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[PATCH openEuler-22.03-LTS-SP1] ALSA: scarlett2: Add missing error checks to *_ctl_get()
by Yu Liao 11 Jun '24

11 Jun '24

From: "Geoffrey D. Bennett" <g(a)b4.vu> stable inclusion from stable-v5.15.148 commit 3a09488f4f67f7ade59b8ac62a6c7fb29439cf51 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9Q9F0 CVE: CVE-2023-52680 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 50603a67daef161c78c814580d57f7f0be57167e ] The *_ctl_get() functions which call scarlett2_update_*() were not checking the return value. Fix to check the return value and pass to the caller. Signed-off-by: Geoffrey D. Bennett <g(a)b4.vu> Fixes: 9e4d5c1be21f ("ALSA: usb-audio: Scarlett Gen 2 mixer interface") Link: https://lore.kernel.org/r/32a5fdc83b05fa74e0fcdd672fbf71d75c5f0a6d.17030010… Signed-off-by: Takashi Iwai <tiwai(a)suse.de> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Conflicts: sound/usb/mixer_scarlett_gen2.c [Follow the patch logic and adapt the patch.] Signed-off-by: Yu Liao <liaoyu15(a)huawei.com> --- sound/usb/mixer_scarlett_gen2.c | 43 +++++++++++++++++++++++---------- 1 file changed, 30 insertions(+), 13 deletions(-) diff --git a/sound/usb/mixer_scarlett_gen2.c b/sound/usb/mixer_scarlett_gen2.c index 6b7c8b8d7111..d1c0d2bf4b6f 100644 --- a/sound/usb/mixer_scarlett_gen2.c +++ b/sound/usb/mixer_scarlett_gen2.c @@ -1032,14 +1032,20 @@ static int scarlett2_master_volume_ctl_get(struct snd_kcontrol *kctl, struct usb_mixer_elem_info *elem = kctl->private_data; struct usb_mixer_interface *mixer = elem->head.mixer; struct scarlett2_mixer_data *private = mixer->private_data; + int err = 0; mutex_lock(&private->data_mutex); - if (private->vol_updated) - scarlett2_update_volumes(mixer); - mutex_unlock(&private->data_mutex); + if (private->vol_updated) { + err = scarlett2_update_volumes(mixer); + if (err < 0) + goto unlock; + } ucontrol->value.integer.value[0] = private->master_vol; - return 0; + +unlock: + mutex_unlock(&private->data_mutex); + return err; } static int scarlett2_volume_ctl_get(struct snd_kcontrol *kctl, @@ -1049,14 +1055,19 @@ static int scarlett2_volume_ctl_get(struct snd_kcontrol *kctl, struct usb_mixer_interface *mixer = elem->head.mixer; struct scarlett2_mixer_data *private = mixer->private_data; int index = elem->control; + int err = 0; mutex_lock(&private->data_mutex); - if (private->vol_updated) - scarlett2_update_volumes(mixer); - mutex_unlock(&private->data_mutex); - + if (private->vol_updated) { + err = scarlett2_update_volumes(mixer); + if (err < 0) + goto unlock; + } ucontrol->value.integer.value[0] = private->vol[index]; - return 0; + +unlock: + mutex_unlock(&private->data_mutex); + return err; } static int scarlett2_volume_ctl_put(struct snd_kcontrol *kctl, @@ -1322,14 +1333,20 @@ static int scarlett2_button_ctl_get(struct snd_kcontrol *kctl, struct usb_mixer_elem_info *elem = kctl->private_data; struct usb_mixer_interface *mixer = elem->head.mixer; struct scarlett2_mixer_data *private = mixer->private_data; + int err = 0; mutex_lock(&private->data_mutex); - if (private->vol_updated) - scarlett2_update_volumes(mixer); - mutex_unlock(&private->data_mutex); + if (private->vol_updated) { + err = scarlett2_update_volumes(mixer); + if (err < 0) + goto unlock; + } ucontrol->value.enumerated.item[0] = private->buttons[elem->control]; - return 0; + +unlock: + mutex_unlock(&private->data_mutex); + return err; } static int scarlett2_button_ctl_put(struct snd_kcontrol *kctl, -- 2.33.0

2 1

[PATCH OLK-5.10] ALSA: scarlett2: Add missing error checks to *_ctl_get()
by Yu Liao 11 Jun '24

11 Jun '24

From: "Geoffrey D. Bennett" <g(a)b4.vu> stable inclusion from stable-v5.15.148 commit 3a09488f4f67f7ade59b8ac62a6c7fb29439cf51 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9Q9F0 CVE: CVE-2023-52680 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 50603a67daef161c78c814580d57f7f0be57167e ] The *_ctl_get() functions which call scarlett2_update_*() were not checking the return value. Fix to check the return value and pass to the caller. Signed-off-by: Geoffrey D. Bennett <g(a)b4.vu> Fixes: 9e4d5c1be21f ("ALSA: usb-audio: Scarlett Gen 2 mixer interface") Link: https://lore.kernel.org/r/32a5fdc83b05fa74e0fcdd672fbf71d75c5f0a6d.17030010… Signed-off-by: Takashi Iwai <tiwai(a)suse.de> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Conflicts: sound/usb/mixer_scarlett_gen2.c [Follow the patch logic and adapt the patch.] Signed-off-by: Yu Liao <liaoyu15(a)huawei.com> --- sound/usb/mixer_scarlett_gen2.c | 43 +++++++++++++++++++++++---------- 1 file changed, 30 insertions(+), 13 deletions(-) diff --git a/sound/usb/mixer_scarlett_gen2.c b/sound/usb/mixer_scarlett_gen2.c index 6b7c8b8d7111..d1c0d2bf4b6f 100644 --- a/sound/usb/mixer_scarlett_gen2.c +++ b/sound/usb/mixer_scarlett_gen2.c @@ -1032,14 +1032,20 @@ static int scarlett2_master_volume_ctl_get(struct snd_kcontrol *kctl, struct usb_mixer_elem_info *elem = kctl->private_data; struct usb_mixer_interface *mixer = elem->head.mixer; struct scarlett2_mixer_data *private = mixer->private_data; + int err = 0; mutex_lock(&private->data_mutex); - if (private->vol_updated) - scarlett2_update_volumes(mixer); - mutex_unlock(&private->data_mutex); + if (private->vol_updated) { + err = scarlett2_update_volumes(mixer); + if (err < 0) + goto unlock; + } ucontrol->value.integer.value[0] = private->master_vol; - return 0; + +unlock: + mutex_unlock(&private->data_mutex); + return err; } static int scarlett2_volume_ctl_get(struct snd_kcontrol *kctl, @@ -1049,14 +1055,19 @@ static int scarlett2_volume_ctl_get(struct snd_kcontrol *kctl, struct usb_mixer_interface *mixer = elem->head.mixer; struct scarlett2_mixer_data *private = mixer->private_data; int index = elem->control; + int err = 0; mutex_lock(&private->data_mutex); - if (private->vol_updated) - scarlett2_update_volumes(mixer); - mutex_unlock(&private->data_mutex); - + if (private->vol_updated) { + err = scarlett2_update_volumes(mixer); + if (err < 0) + goto unlock; + } ucontrol->value.integer.value[0] = private->vol[index]; - return 0; + +unlock: + mutex_unlock(&private->data_mutex); + return err; } static int scarlett2_volume_ctl_put(struct snd_kcontrol *kctl, @@ -1322,14 +1333,20 @@ static int scarlett2_button_ctl_get(struct snd_kcontrol *kctl, struct usb_mixer_elem_info *elem = kctl->private_data; struct usb_mixer_interface *mixer = elem->head.mixer; struct scarlett2_mixer_data *private = mixer->private_data; + int err = 0; mutex_lock(&private->data_mutex); - if (private->vol_updated) - scarlett2_update_volumes(mixer); - mutex_unlock(&private->data_mutex); + if (private->vol_updated) { + err = scarlett2_update_volumes(mixer); + if (err < 0) + goto unlock; + } ucontrol->value.enumerated.item[0] = private->buttons[elem->control]; - return 0; + +unlock: + mutex_unlock(&private->data_mutex); + return err; } static int scarlett2_button_ctl_put(struct snd_kcontrol *kctl, -- 2.33.0

2 1

[OLK-5.10 PATCH] ALSA: scarlett2: Add missing error checks to *_ctl_get()
by Yu Liao 11 Jun '24

11 Jun '24

From: "Geoffrey D. Bennett" <g(a)b4.vu> stable inclusion from stable-v5.15.148 commit 3a09488f4f67f7ade59b8ac62a6c7fb29439cf51 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9Q9F0 CVE: CVE-2023-52680 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 50603a67daef161c78c814580d57f7f0be57167e ] The *_ctl_get() functions which call scarlett2_update_*() were not checking the return value. Fix to check the return value and pass to the caller. Signed-off-by: Geoffrey D. Bennett <g(a)b4.vu> Fixes: 9e4d5c1be21f ("ALSA: usb-audio: Scarlett Gen 2 mixer interface") Link: https://lore.kernel.org/r/32a5fdc83b05fa74e0fcdd672fbf71d75c5f0a6d.17030010… Signed-off-by: Takashi Iwai <tiwai(a)suse.de> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Conflicts: sound/usb/mixer_scarlett_gen2.c [Follow the patch logic and adapt the patch.] Signed-off-by: Yu Liao <liaoyu15(a)huawei.com> --- sound/usb/mixer_scarlett_gen2.c | 43 +++++++++++++++++++++++---------- 1 file changed, 30 insertions(+), 13 deletions(-) diff --git a/sound/usb/mixer_scarlett_gen2.c b/sound/usb/mixer_scarlett_gen2.c index 6b7c8b8d7111..d1c0d2bf4b6f 100644 --- a/sound/usb/mixer_scarlett_gen2.c +++ b/sound/usb/mixer_scarlett_gen2.c @@ -1032,14 +1032,20 @@ static int scarlett2_master_volume_ctl_get(struct snd_kcontrol *kctl, struct usb_mixer_elem_info *elem = kctl->private_data; struct usb_mixer_interface *mixer = elem->head.mixer; struct scarlett2_mixer_data *private = mixer->private_data; + int err = 0; mutex_lock(&private->data_mutex); - if (private->vol_updated) - scarlett2_update_volumes(mixer); - mutex_unlock(&private->data_mutex); + if (private->vol_updated) { + err = scarlett2_update_volumes(mixer); + if (err < 0) + goto unlock; + } ucontrol->value.integer.value[0] = private->master_vol; - return 0; + +unlock: + mutex_unlock(&private->data_mutex); + return err; } static int scarlett2_volume_ctl_get(struct snd_kcontrol *kctl, @@ -1049,14 +1055,19 @@ static int scarlett2_volume_ctl_get(struct snd_kcontrol *kctl, struct usb_mixer_interface *mixer = elem->head.mixer; struct scarlett2_mixer_data *private = mixer->private_data; int index = elem->control; + int err = 0; mutex_lock(&private->data_mutex); - if (private->vol_updated) - scarlett2_update_volumes(mixer); - mutex_unlock(&private->data_mutex); - + if (private->vol_updated) { + err = scarlett2_update_volumes(mixer); + if (err < 0) + goto unlock; + } ucontrol->value.integer.value[0] = private->vol[index]; - return 0; + +unlock: + mutex_unlock(&private->data_mutex); + return err; } static int scarlett2_volume_ctl_put(struct snd_kcontrol *kctl, @@ -1322,14 +1333,20 @@ static int scarlett2_button_ctl_get(struct snd_kcontrol *kctl, struct usb_mixer_elem_info *elem = kctl->private_data; struct usb_mixer_interface *mixer = elem->head.mixer; struct scarlett2_mixer_data *private = mixer->private_data; + int err = 0; mutex_lock(&private->data_mutex); - if (private->vol_updated) - scarlett2_update_volumes(mixer); - mutex_unlock(&private->data_mutex); + if (private->vol_updated) { + err = scarlett2_update_volumes(mixer); + if (err < 0) + goto unlock; + } ucontrol->value.enumerated.item[0] = private->buttons[elem->control]; - return 0; + +unlock: + mutex_unlock(&private->data_mutex); + return err; } static int scarlett2_button_ctl_put(struct snd_kcontrol *kctl, -- 2.33.0

1 0

[openEuler-22.03-LTS-SP1 PATCH] ALSA: scarlett2: Add missing error checks to *_ctl_get()
by Yu Liao 11 Jun '24

11 Jun '24

From: "Geoffrey D. Bennett" <g(a)b4.vu> stable inclusion from stable-v5.15.148 commit 3a09488f4f67f7ade59b8ac62a6c7fb29439cf51 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9Q9F0 CVE: CVE-2023-52680 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 50603a67daef161c78c814580d57f7f0be57167e ] The *_ctl_get() functions which call scarlett2_update_*() were not checking the return value. Fix to check the return value and pass to the caller. Signed-off-by: Geoffrey D. Bennett <g(a)b4.vu> Fixes: 9e4d5c1be21f ("ALSA: usb-audio: Scarlett Gen 2 mixer interface") Link: https://lore.kernel.org/r/32a5fdc83b05fa74e0fcdd672fbf71d75c5f0a6d.17030010… Signed-off-by: Takashi Iwai <tiwai(a)suse.de> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Conflicts: sound/usb/mixer_scarlett_gen2.c [Follow the patch logic and adapt the patch.] Signed-off-by: Yu Liao <liaoyu15(a)huawei.com> --- sound/usb/mixer_scarlett_gen2.c | 43 +++++++++++++++++++++++---------- 1 file changed, 30 insertions(+), 13 deletions(-) diff --git a/sound/usb/mixer_scarlett_gen2.c b/sound/usb/mixer_scarlett_gen2.c index 6b7c8b8d7111..d1c0d2bf4b6f 100644 --- a/sound/usb/mixer_scarlett_gen2.c +++ b/sound/usb/mixer_scarlett_gen2.c @@ -1032,14 +1032,20 @@ static int scarlett2_master_volume_ctl_get(struct snd_kcontrol *kctl, struct usb_mixer_elem_info *elem = kctl->private_data; struct usb_mixer_interface *mixer = elem->head.mixer; struct scarlett2_mixer_data *private = mixer->private_data; + int err = 0; mutex_lock(&private->data_mutex); - if (private->vol_updated) - scarlett2_update_volumes(mixer); - mutex_unlock(&private->data_mutex); + if (private->vol_updated) { + err = scarlett2_update_volumes(mixer); + if (err < 0) + goto unlock; + } ucontrol->value.integer.value[0] = private->master_vol; - return 0; + +unlock: + mutex_unlock(&private->data_mutex); + return err; } static int scarlett2_volume_ctl_get(struct snd_kcontrol *kctl, @@ -1049,14 +1055,19 @@ static int scarlett2_volume_ctl_get(struct snd_kcontrol *kctl, struct usb_mixer_interface *mixer = elem->head.mixer; struct scarlett2_mixer_data *private = mixer->private_data; int index = elem->control; + int err = 0; mutex_lock(&private->data_mutex); - if (private->vol_updated) - scarlett2_update_volumes(mixer); - mutex_unlock(&private->data_mutex); - + if (private->vol_updated) { + err = scarlett2_update_volumes(mixer); + if (err < 0) + goto unlock; + } ucontrol->value.integer.value[0] = private->vol[index]; - return 0; + +unlock: + mutex_unlock(&private->data_mutex); + return err; } static int scarlett2_volume_ctl_put(struct snd_kcontrol *kctl, @@ -1322,14 +1333,20 @@ static int scarlett2_button_ctl_get(struct snd_kcontrol *kctl, struct usb_mixer_elem_info *elem = kctl->private_data; struct usb_mixer_interface *mixer = elem->head.mixer; struct scarlett2_mixer_data *private = mixer->private_data; + int err = 0; mutex_lock(&private->data_mutex); - if (private->vol_updated) - scarlett2_update_volumes(mixer); - mutex_unlock(&private->data_mutex); + if (private->vol_updated) { + err = scarlett2_update_volumes(mixer); + if (err < 0) + goto unlock; + } ucontrol->value.enumerated.item[0] = private->buttons[elem->control]; - return 0; + +unlock: + mutex_unlock(&private->data_mutex); + return err; } static int scarlett2_button_ctl_put(struct snd_kcontrol *kctl, -- 2.33.0

1 0

[PATCH OLK-5.10] cvm_tsi: Fix security issue for Confidential cVM TSI
by Shengjie Li 11 Jun '24

11 Jun '24

virtcca inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IA45I1 -------------------------------- Fix security issue for Confidential cVM TSI: 1. Init TSI driver when config cvm_guest. 2. Modify the token structure to reduce the variables that are exposed to the user state. 3. Add a lock for obtaining the remote attestation report. Fixes: 31071f4b2a0b ("cvm_tsi: add cvm tsi interface") Signed-off-by: Shengjie Li <lishengjie12(a)huawei.com> --- arch/arm64/include/asm/cvm_smc.h | 22 +++---- arch/arm64/include/uapi/asm/cvm_tsi.h | 11 ++-- arch/arm64/kernel/cvm_tsi.c | 89 ++++++++++++++------------- 3 files changed, 64 insertions(+), 58 deletions(-) diff --git a/arch/arm64/include/asm/cvm_smc.h b/arch/arm64/include/asm/cvm_smc.h index c4d56333e3..91688bc169 100644 --- a/arch/arm64/include/asm/cvm_smc.h +++ b/arch/arm64/include/asm/cvm_smc.h @@ -124,30 +124,30 @@ static inline unsigned long tsi_measurement_read(struct cvm_measurement *cvm_mea return res.a0; } -static inline unsigned long tsi_attestation_token_init(struct cvm_attestation_cmd *attest_cmd) +static inline unsigned long tsi_attestation_token_init(unsigned char *challenge) { struct arm_smccc_res res; - unsigned char *challenge; + unsigned char *buf; - challenge = kmalloc(CHALLENGE_SIZE, GFP_KERNEL); - if (!challenge) + buf = kmalloc(CHALLENGE_SIZE, GFP_KERNEL); + if (!buf) return -ENOMEM; - memcpy(challenge, attest_cmd->challenge, CHALLENGE_SIZE); + memcpy(buf, challenge, CHALLENGE_SIZE); - arm_smccc_1_1_smc(SMC_TSI_ATTESTATION_TOKEN_INIT, virt_to_phys(challenge), &res); - kfree(challenge); + arm_smccc_1_1_smc(SMC_TSI_ATTESTATION_TOKEN_INIT, virt_to_phys(buf), &res); + kfree(buf); return res.a0; } -static inline unsigned long tsi_attestation_token_continue(struct cvm_attestation_cmd *attest_cmd) +static inline unsigned long tsi_attestation_token_continue(struct cvm_token_granule *token_granule) { struct arm_smccc_res res; - arm_smccc_1_1_smc(SMC_TSI_ATTESTATION_TOKEN_CONTINUE, virt_to_phys(attest_cmd->granule_ipa), - attest_cmd->offset, attest_cmd->size, &res); + arm_smccc_1_1_smc(SMC_TSI_ATTESTATION_TOKEN_CONTINUE, virt_to_phys(token_granule->ipa), + token_granule->offset, token_granule->size, &res); - attest_cmd->num_wr_bytes = res.a1; + token_granule->num_wr_bytes = res.a1; return res.a0; } diff --git a/arch/arm64/include/uapi/asm/cvm_tsi.h b/arch/arm64/include/uapi/asm/cvm_tsi.h index 43e17a0da0..1ed4386db2 100644 --- a/arch/arm64/include/uapi/asm/cvm_tsi.h +++ b/arch/arm64/include/uapi/asm/cvm_tsi.h @@ -55,10 +55,13 @@ struct cvm_measurement_extend { struct cvm_attestation_cmd { unsigned char challenge[CHALLENGE_SIZE]; /* input: challenge value */ - unsigned long token_size; /* return: challenge value */ - void *granule_head; - void *granule_ipa; /* IPA of the Granule to which the token will be written */ - unsigned long granule_count; + unsigned long token_size; /* return: token size */ +}; + +struct cvm_token_granule { + void *head; + void *ipa; /* IPA of the Granule to which the token will be written */ + unsigned long count; unsigned long offset; /* Offset within Granule to start of buffer in bytes */ unsigned long size; /* Size of buffer in bytes */ unsigned long num_wr_bytes; /* Number of bytes written to buffer */ diff --git a/arch/arm64/kernel/cvm_tsi.c b/arch/arm64/kernel/cvm_tsi.c index b48e5b17f4..252fe5352a 100644 --- a/arch/arm64/kernel/cvm_tsi.c +++ b/arch/arm64/kernel/cvm_tsi.c @@ -4,6 +4,7 @@ #include <linux/slab.h> #include <linux/miscdevice.h> #include <linux/preempt.h> +#include <asm/cvm_guest.h> #include <asm/cvm_smc.h> #include <asm/cvm_tsi.h> @@ -16,20 +17,19 @@ struct attestation_token { static struct attestation_token token; +static DEFINE_SPINLOCK(lock); + static long tmm_tsi_ioctl(struct file *file, unsigned int cmd, unsigned long arg); -static int tmm_tsi_release(struct inode *inode, struct file *file); static ssize_t tmm_token_read(struct file *file, char __user *user_buffer, size_t size, loff_t *offset); static int tmm_get_tsi_version(struct cvm_tsi_version __user *arg); -static int tmm_get_attestation_token(struct cvm_attestation_cmd __user *arg, - struct attestation_token *attest_token); +static int tmm_get_attestation_token(struct cvm_attestation_cmd __user *arg); static int tmm_get_device_cert(struct cca_device_cert __user *arg); static const struct file_operations tmm_tsi_fops = { .owner = THIS_MODULE, .read = tmm_token_read, - .release = tmm_tsi_release, .unlocked_ioctl = tmm_tsi_ioctl }; @@ -44,6 +44,9 @@ static int __init tmm_tsi_init(void) unsigned long ver; int ret; + if (!is_cvm_world()) + return -EIO; + ver = tsi_get_version(); if (ver == SMCCC_RET_NOT_SUPPORTED) { pr_err("tmm_tsi: SMC return not supported!\n"); @@ -56,6 +59,11 @@ static int __init tmm_tsi_init(void) return ret; } + /* Allocate a large memory */ + token.buf = kmalloc(GRANULE_SIZE * MAX_TOKEN_GRANULE_PAGE, GFP_KERNEL); + if (!token.buf) + return -ENOMEM; + pr_warn("tmm_tsi: module loaded (version %lu.%lu).\n", TSI_ABI_VERSION_GET_MAJOR(ver), TSI_ABI_VERSION_GET_MINOR(ver)); @@ -65,8 +73,10 @@ static int __init tmm_tsi_init(void) static void __exit tmm_tsi_exit(void) { - if (token.buf != NULL) + if (token.buf != NULL) { + memset(token.buf, 0, GRANULE_SIZE * MAX_TOKEN_GRANULE_PAGE); kfree(token.buf); + } misc_deregister(&ioctl_dev); pr_warn("tmm_tsi: module unloaded.\n"); } @@ -80,7 +90,7 @@ static long tmm_tsi_ioctl(struct file *file, unsigned int cmd, unsigned long arg ret = tmm_get_tsi_version((struct cvm_tsi_version *)arg); break; case TMM_GET_ATTESTATION_TOKEN: - ret = tmm_get_attestation_token((struct cvm_attestation_cmd *)arg, &token); + ret = tmm_get_attestation_token((struct cvm_attestation_cmd *)arg); break; case TMM_GET_DEVICE_CERT: ret = tmm_get_device_cert((struct cca_device_cert *)arg); @@ -99,28 +109,25 @@ static ssize_t tmm_token_read(struct file *file, char __user *user_buffer, int ret; int to_copy; - if (*offset >= token.size) + spin_lock(&lock); + if (*offset >= token.size) { + spin_unlock(&lock); return 0; + } to_copy = min((int)size, (int)(token.size - *offset)); ret = copy_to_user(user_buffer, token.buf + *offset, to_copy); if (ret) { pr_err("tmm_tsi: copy token to user failed (%d)!\n", ret); + spin_unlock(&lock); return -1; } *offset += to_copy; + spin_unlock(&lock); return to_copy; } -static int tmm_tsi_release(struct inode *inode, struct file *file) -{ - if (token.buf != NULL) { - memset(token.buf, 0, GRANULE_SIZE * MAX_TOKEN_GRANULE_PAGE); - kfree(token.buf); - } - return 0; -} static int tmm_get_tsi_version(struct cvm_tsi_version __user *arg) { @@ -141,65 +148,61 @@ static int tmm_get_tsi_version(struct cvm_tsi_version __user *arg) return 0; } -static int tmm_get_attestation_token(struct cvm_attestation_cmd __user *arg, - struct attestation_token *attest_token) +static int tmm_get_attestation_token(struct cvm_attestation_cmd __user *arg) { unsigned long ret; - struct cvm_attestation_cmd cmd = {0}; + struct cvm_token_granule token_granule = {0}; + unsigned char challenge[CHALLENGE_SIZE]; - ret = copy_from_user(&(cmd.challenge), &(arg->challenge), sizeof(cmd.challenge)); + ret = copy_from_user(challenge, &(arg->challenge), CHALLENGE_SIZE); if (ret) { pr_err("tmm_tsi: copy data from user failed (%lu)!\n", ret); return -EFAULT; } - /* Allocate a large memory */ - attest_token->buf = kmalloc(GRANULE_SIZE * MAX_TOKEN_GRANULE_PAGE, GFP_KERNEL); - if (!attest_token->buf) - return -ENOMEM; - cmd.granule_head = attest_token->buf; - cmd.granule_ipa = cmd.granule_head; + spin_lock(&lock); + token_granule.head = token.buf; + token_granule.ipa = token_granule.head; - /* preempt_disable(); */ - - ret = tsi_attestation_token_init(&cmd); + ret = tsi_attestation_token_init(challenge); if (ret) { pr_err("tmm_tsi: tsi call tsi_attestation_token_init failed (%lu)!\n", ret); + spin_unlock(&lock); return -EIO; } do { /* Retrieve one Granule of data per loop iteration */ - cmd.granule_ipa = cmd.granule_head + - (unsigned long)(cmd.granule_count * GRANULE_SIZE); - cmd.offset = 0; + token_granule.ipa = token_granule.head + + (unsigned long)(token_granule.count * GRANULE_SIZE); + token_granule.offset = 0; do { /* Retrieve sub-Granule chunk of data per loop iteration */ - cmd.size = GRANULE_SIZE - cmd.offset; - ret = tsi_attestation_token_continue(&cmd); - cmd.offset += cmd.num_wr_bytes; - } while (ret == TSI_INCOMPLETE && cmd.offset < GRANULE_SIZE); + token_granule.size = GRANULE_SIZE - token_granule.offset; + ret = tsi_attestation_token_continue(&token_granule); + token_granule.offset += token_granule.num_wr_bytes; + } while (ret == TSI_INCOMPLETE && token_granule.offset < GRANULE_SIZE); - cmd.granule_count += 1; - if (cmd.granule_count >= MAX_TOKEN_GRANULE_PAGE && ret == TSI_INCOMPLETE) { + token_granule.count += 1; + if (token_granule.count >= MAX_TOKEN_GRANULE_PAGE && ret == TSI_INCOMPLETE) { pr_err("tmm_tsi: macro MAX_TOKEN_GRANULE_PAGE (%d) is too small!\n", MAX_TOKEN_GRANULE_PAGE); + spin_unlock(&lock); return -ENOMEM; } } while (ret == TSI_INCOMPLETE); - /* preempt_enable(); */ - /* Send to user space the total size of the token */ - cmd.granule_count = cmd.granule_count - 1; - cmd.token_size = (unsigned long)(GRANULE_SIZE * cmd.granule_count) + cmd.offset; - attest_token->size = cmd.token_size; + token_granule.count = token_granule.count - 1; + token.size = (unsigned long)(GRANULE_SIZE * token_granule.count) + token_granule.offset; - ret = copy_to_user(&(arg->token_size), &(cmd.token_size), sizeof(cmd.token_size)); + ret = copy_to_user(&(arg->token_size), &(token.size), sizeof(token.size)); if (ret) { pr_err("tmm_tsi: copy data to user failed (%lu)!\n", ret); + spin_unlock(&lock); return -EFAULT; } + spin_unlock(&lock); return 0; } -- 2.37.2.windows.2

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[PATCH OLK-6.6] block: fix module reference leakage from bdev_open_by_dev error path
by Li Lingfeng 11 Jun '24

11 Jun '24

From: Yu Kuai <yukuai3(a)huawei.com> mainline inclusion from mainline-v6.9-rc6 commit 9617cd6f24b294552a817f80f5225431ef67b540 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9Q9I0 CVE: CVE-2024-35859 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- At the time bdev_may_open() is called, module reference is grabbed already, hence module reference should be released if bdev_may_open() failed. This problem is found by code review. Fixes: ed5cc702d311 ("block: Add config option to not allow writing to mounted devices") Signed-off-by: Yu Kuai <yukuai3(a)huawei.com> Link: https://lore.kernel.org/r/20240406090930.2252838-22-yukuai1@huaweicloud.com Signed-off-by: Christian Brauner <brauner(a)kernel.org> Signed-off-by: Li Lingfeng <lilingfeng3(a)huawei.com> --- block/bdev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/block/bdev.c b/block/bdev.c index b555deef0d76..07e8e3686aea 100644 --- a/block/bdev.c +++ b/block/bdev.c @@ -946,7 +946,7 @@ struct bdev_handle *bdev_open_by_dev(dev_t dev, blk_mode_t mode, void *holder, goto abort_claiming; ret = -EBUSY; if (!bdev_may_open(bdev, mode)) - goto abort_claiming; + goto put_module; if (bdev_is_partition(bdev)) ret = blkdev_get_part(bdev, mode); else -- 2.31.1

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[PATCH OLK-6.6] tipc: fix a possible memleak in tipc_buf_append
by Zhengchao Shao 11 Jun '24

11 Jun '24

From: Xin Long <lucien.xin(a)gmail.com> stable inclusion from stable-v6.6.31 commit 614c5a5ae45a921595952117b2e2bd4d4bf9b574 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9US4T CVE: CVE-2024-36954 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 97bf6f81b29a8efaf5d0983251a7450e5794370d ] __skb_linearize() doesn't free the skb when it fails, so move '*buf = NULL' after __skb_linearize(), so that the skb can be freed on the err path. Fixes: b7df21cf1b79 ("tipc: skb_linearize the head skb when reassembling msgs") Reported-by: Paolo Abeni <pabeni(a)redhat.com> Signed-off-by: Xin Long <lucien.xin(a)gmail.com> Reviewed-by: Simon Horman <horms(a)kernel.org> Reviewed-by: Tung Nguyen <tung.q.nguyen(a)dektech.com.au> Link: https://lore.kernel.org/r/90710748c29a1521efac4f75ea01b3b7e61414cf.17144858… Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Zhengchao Shao <shaozhengchao(a)huawei.com> --- net/tipc/msg.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/tipc/msg.c b/net/tipc/msg.c index 5c9fd4791c4b..c52ab423082c 100644 --- a/net/tipc/msg.c +++ b/net/tipc/msg.c @@ -142,9 +142,9 @@ int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf) if (fragid == FIRST_FRAGMENT) { if (unlikely(head)) goto err; - *buf = NULL; if (skb_has_frag_list(frag) && __skb_linearize(frag)) goto err; + *buf = NULL; frag = skb_unshare(frag, GFP_ATOMIC); if (unlikely(!frag)) goto err; -- 2.34.1

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[PATCH] tipc: fix a possible memleak in tipc_buf_append
by Zhengchao Shao 11 Jun '24

11 Jun '24

From: Xin Long <lucien.xin(a)gmail.com> [ Upstream commit 97bf6f81b29a8efaf5d0983251a7450e5794370d ] __skb_linearize() doesn't free the skb when it fails, so move '*buf = NULL' after __skb_linearize(), so that the skb can be freed on the err path. Fixes: b7df21cf1b79 ("tipc: skb_linearize the head skb when reassembling msgs") Reported-by: Paolo Abeni <pabeni(a)redhat.com> Signed-off-by: Xin Long <lucien.xin(a)gmail.com> Reviewed-by: Simon Horman <horms(a)kernel.org> Reviewed-by: Tung Nguyen <tung.q.nguyen(a)dektech.com.au> Link: https://lore.kernel.org/r/90710748c29a1521efac4f75ea01b3b7e61414cf.17144858… Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- net/tipc/msg.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/tipc/msg.c b/net/tipc/msg.c index 5c9fd4791c4b..c52ab423082c 100644 --- a/net/tipc/msg.c +++ b/net/tipc/msg.c @@ -142,9 +142,9 @@ int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf) if (fragid == FIRST_FRAGMENT) { if (unlikely(head)) goto err; - *buf = NULL; if (skb_has_frag_list(frag) && __skb_linearize(frag)) goto err; + *buf = NULL; frag = skb_unshare(frag, GFP_ATOMIC); if (unlikely(!frag)) goto err; -- 2.34.1

1 0

[PATCH OLK-6.6] gpiolib: cdev: Fix use after free in lineinfo_changed_notify
by Wupeng Ma 11 Jun '24

11 Jun '24

From: Zhongqiu Han <quic_zhonhan(a)quicinc.com> stable inclusion from stable-v6.6.31 commit 95ca7c90eaf5ea8a8460536535101e3e81160e2a category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9UG5Z CVE: CVE-2024-36899 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 02f6b0e1ec7e0e7d059dddc893645816552039da ] The use-after-free issue occurs as follows: when the GPIO chip device file is being closed by invoking gpio_chrdev_release(), watched_lines is freed by bitmap_free(), but the unregistration of lineinfo_changed_nb notifier chain failed due to waiting write rwsem. Additionally, one of the GPIO chip's lines is also in the release process and holds the notifier chain's read rwsem. Consequently, a race condition leads to the use-after-free of watched_lines. Here is the typical stack when issue happened: [free] gpio_chrdev_release() --> bitmap_free(cdev->watched_lines) <-- freed --> blocking_notifier_chain_unregister() --> down_write(&nh->rwsem) <-- waiting rwsem --> __down_write_common() --> rwsem_down_write_slowpath() --> schedule_preempt_disabled() --> schedule() [use] st54spi_gpio_dev_release() --> gpio_free() --> gpiod_free() --> gpiod_free_commit() --> gpiod_line_state_notify() --> blocking_notifier_call_chain() --> down_read(&nh->rwsem); <-- held rwsem --> notifier_call_chain() --> lineinfo_changed_notify() --> test_bit(xxxx, cdev->watched_lines) <-- use after free The side effect of the use-after-free issue is that a GPIO line event is being generated for userspace where it shouldn't. However, since the chrdev is being closed, userspace won't have the chance to read that event anyway. To fix the issue, call the bitmap_free() function after the unregistration of lineinfo_changed_nb notifier chain. Fixes: 51c1064e82e7 ("gpiolib: add new ioctl() for monitoring changes in line info") Signed-off-by: Zhongqiu Han <quic_zhonhan(a)quicinc.com> Link: https://lore.kernel.org/r/20240505141156.2944912-1-quic_zhonhan@quicinc.com Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski(a)linaro.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Ma Wupeng <mawupeng1(a)huawei.com> --- drivers/gpio/gpiolib-cdev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpio/gpiolib-cdev.c b/drivers/gpio/gpiolib-cdev.c index 84125e55de10..ebf5b8ef3b5d 100644 --- a/drivers/gpio/gpiolib-cdev.c +++ b/drivers/gpio/gpiolib-cdev.c @@ -2816,11 +2816,11 @@ static int gpio_chrdev_release(struct inode *inode, struct file *file) struct gpio_chardev_data *cdev = file->private_data; struct gpio_device *gdev = cdev->gdev; - bitmap_free(cdev->watched_lines); blocking_notifier_chain_unregister(&gdev->device_notifier, &cdev->device_unregistered_nb); blocking_notifier_chain_unregister(&gdev->line_state_notifier, &cdev->lineinfo_changed_nb); + bitmap_free(cdev->watched_lines); gpio_device_put(gdev); kfree(cdev); -- 2.25.1

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[PATCH OLK-6.6 v2] bpf, skmsg: Fix NULL pointer dereference in sk_psock_skb_ingress_enqueue
by Liu Jian 11 Jun '24

11 Jun '24

From: Jason Xing <kernelxing(a)tencent.com> stable inclusion from stable-v6.6.31 commit b397a0ab8582c533ec0c6b732392f141fc364f87 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9U1UZ CVE: CVE-2024-36938 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… --------------------------- [ Upstream commit 6648e613226e18897231ab5e42ffc29e63fa3365 ] Fix NULL pointer data-races in sk_psock_skb_ingress_enqueue() which syzbot reported [1]. [1] BUG: KCSAN: data-race in sk_psock_drop / sk_psock_skb_ingress_enqueue write to 0xffff88814b3278b8 of 8 bytes by task 10724 on cpu 1: sk_psock_stop_verdict net/core/skmsg.c:1257 [inline] sk_psock_drop+0x13e/0x1f0 net/core/skmsg.c:843 sk_psock_put include/linux/skmsg.h:459 [inline] sock_map_close+0x1a7/0x260 net/core/sock_map.c:1648 unix_release+0x4b/0x80 net/unix/af_unix.c:1048 __sock_release net/socket.c:659 [inline] sock_close+0x68/0x150 net/socket.c:1421 __fput+0x2c1/0x660 fs/file_table.c:422 __fput_sync+0x44/0x60 fs/file_table.c:507 __do_sys_close fs/open.c:1556 [inline] __se_sys_close+0x101/0x1b0 fs/open.c:1541 __x64_sys_close+0x1f/0x30 fs/open.c:1541 do_syscall_64+0xd3/0x1d0 entry_SYSCALL_64_after_hwframe+0x6d/0x75 read to 0xffff88814b3278b8 of 8 bytes by task 10713 on cpu 0: sk_psock_data_ready include/linux/skmsg.h:464 [inline] sk_psock_skb_ingress_enqueue+0x32d/0x390 net/core/skmsg.c:555 sk_psock_skb_ingress_self+0x185/0x1e0 net/core/skmsg.c:606 sk_psock_verdict_apply net/core/skmsg.c:1008 [inline] sk_psock_verdict_recv+0x3e4/0x4a0 net/core/skmsg.c:1202 unix_read_skb net/unix/af_unix.c:2546 [inline] unix_stream_read_skb+0x9e/0xf0 net/unix/af_unix.c:2682 sk_psock_verdict_data_ready+0x77/0x220 net/core/skmsg.c:1223 unix_stream_sendmsg+0x527/0x860 net/unix/af_unix.c:2339 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x140/0x180 net/socket.c:745 ____sys_sendmsg+0x312/0x410 net/socket.c:2584 ___sys_sendmsg net/socket.c:2638 [inline] __sys_sendmsg+0x1e9/0x280 net/socket.c:2667 __do_sys_sendmsg net/socket.c:2676 [inline] __se_sys_sendmsg net/socket.c:2674 [inline] __x64_sys_sendmsg+0x46/0x50 net/socket.c:2674 do_syscall_64+0xd3/0x1d0 entry_SYSCALL_64_after_hwframe+0x6d/0x75 value changed: 0xffffffff83d7feb0 -> 0x0000000000000000 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 10713 Comm: syz-executor.4 Tainted: G W 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 Prior to this, commit 4cd12c6065df ("bpf, sockmap: Fix NULL pointer dereference in sk_psock_verdict_data_ready()") fixed one NULL pointer similarly due to no protection of saved_data_ready. Here is another different caller causing the same issue because of the same reason. So we should protect it with sk_callback_lock read lock because the writer side in the sk_psock_drop() uses "write_lock_bh(&sk->sk_callback_lock);". To avoid errors that could happen in future, I move those two pairs of lock into the sk_psock_data_ready(), which is suggested by John Fastabend. Fixes: 604326b41a6f ("bpf, sockmap: convert to generic sk_msg interface") Reported-by: syzbot+aa8c8ec2538929f18f2d(a)syzkaller.appspotmail.com Signed-off-by: Jason Xing <kernelxing(a)tencent.com> Signed-off-by: Daniel Borkmann <daniel(a)iogearbox.net> Reviewed-by: John Fastabend <john.fastabend(a)gmail.com> Closes: https://syzkaller.appspot.com/bug?extid=aa8c8ec2538929f18f2d Link: https://lore.kernel.org/all/20240329134037.92124-1-kerneljasonxing@gmail.com Link: https://lore.kernel.org/bpf/20240404021001.94815-1-kerneljasonxing@gmail.com Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Liu Jian <liujian56(a)huawei.com> --- v2: update cve id. include/linux/skmsg.h | 2 ++ net/core/skmsg.c | 5 +---- 2 files changed, 3 insertions(+), 4 deletions(-) diff --git a/include/linux/skmsg.h b/include/linux/skmsg.h index f69af3de0da0..fdedb7a29c0e 100644 --- a/include/linux/skmsg.h +++ b/include/linux/skmsg.h @@ -467,10 +467,12 @@ static inline void sk_psock_put(struct sock *sk, struct sk_psock *psock) static inline void sk_psock_data_ready(struct sock *sk, struct sk_psock *psock) { + read_lock_bh(&sk->sk_callback_lock); if (psock->saved_data_ready) psock->saved_data_ready(sk); else sk->sk_data_ready(sk); + read_unlock_bh(&sk->sk_callback_lock); } static inline void psock_set_prog(struct bpf_prog **pprog, diff --git a/net/core/skmsg.c b/net/core/skmsg.c index 6f774de8f6b2..f2e7ce81fef0 100644 --- a/net/core/skmsg.c +++ b/net/core/skmsg.c @@ -1234,11 +1234,8 @@ static void sk_psock_verdict_data_ready(struct sock *sk) rcu_read_lock(); psock = sk_psock(sk); - if (psock) { - read_lock_bh(&sk->sk_callback_lock); + if (psock) sk_psock_data_ready(sk, psock); - read_unlock_bh(&sk->sk_callback_lock); - } rcu_read_unlock(); } } -- 2.34.1

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