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[PATCH OLK-6.6] ext4: fix slab-out-of-bounds in ext4_mb_find_good_group_avg_frag_lists()
by Yifan Qiao 15 Jul '24

15 Jul '24

From: Baokun Li <libaokun1(a)huawei.com> stable inclusion from stable-v6.6.36 commit 677ff4589f1501578fa903a25bb14831d0607992 category: bugfix bugzilla: 190177 CVE: CVE-2024-40955 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- commit 13df4d44a3aaabe61cd01d277b6ee23ead2a5206 upstream. We can trigger a slab-out-of-bounds with the following commands: mkfs.ext4 -F /dev/$disk 10G mount /dev/$disk /tmp/test echo 2147483647 > /sys/fs/ext4/$disk/mb_group_prealloc echo test > /tmp/test/file && sync ================================================================== BUG: KASAN: slab-out-of-bounds in ext4_mb_find_good_group_avg_frag_lists+0x8a/0x200 [ext4] Read of size 8 at addr ffff888121b9d0f0 by task kworker/u2:0/11 CPU: 0 PID: 11 Comm: kworker/u2:0 Tainted: GL 6.7.0-next-20240118 #521 Call Trace: dump_stack_lvl+0x2c/0x50 kasan_report+0xb6/0xf0 ext4_mb_find_good_group_avg_frag_lists+0x8a/0x200 [ext4] ext4_mb_regular_allocator+0x19e9/0x2370 [ext4] ext4_mb_new_blocks+0x88a/0x1370 [ext4] ext4_ext_map_blocks+0x14f7/0x2390 [ext4] ext4_map_blocks+0x569/0xea0 [ext4] ext4_do_writepages+0x10f6/0x1bc0 [ext4] [...] ================================================================== The flow of issue triggering is as follows: // Set s_mb_group_prealloc to 2147483647 via sysfs ext4_mb_new_blocks ext4_mb_normalize_request ext4_mb_normalize_group_request ac->ac_g_ex.fe_len = EXT4_SB(sb)->s_mb_group_prealloc ext4_mb_regular_allocator ext4_mb_choose_next_group ext4_mb_choose_next_group_best_avail mb_avg_fragment_size_order order = fls(len) - 2 = 29 ext4_mb_find_good_group_avg_frag_lists frag_list = &sbi->s_mb_avg_fragment_size[order] if (list_empty(frag_list)) // Trigger SOOB! At 4k block size, the length of the s_mb_avg_fragment_size list is 14, but an oversized s_mb_group_prealloc is set, causing slab-out-of-bounds to be triggered by an attempt to access an element at index 29. Add a new attr_id attr_clusters_in_group with values in the range [0, sbi->s_clusters_per_group] and declare mb_group_prealloc as that type to fix the issue. In addition avoid returning an order from mb_avg_fragment_size_order() greater than MB_NUM_ORDERS(sb) and reduce some useless loops. Fixes: 7e170922f06b ("ext4: Add allocation criteria 1.5 (CR1_5)") CC: stable(a)vger.kernel.org Signed-off-by: Baokun Li <libaokun1(a)huawei.com> Reviewed-by: Jan Kara <jack(a)suse.cz> Reviewed-by: Ojaswin Mujoo <ojaswin(a)linux.ibm.com> Link: https://lore.kernel.org/r/20240319113325.3110393-5-libaokun1@huawei.com Signed-off-by: Theodore Ts'o <tytso(a)mit.edu> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Yifan Qiao <qiaoyifan4(a)huawei.com> --- fs/ext4/mballoc.c | 4 ++++ fs/ext4/sysfs.c | 13 ++++++++++++- 2 files changed, 16 insertions(+), 1 deletion(-) diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index f6e02978d0e6..9a65cdcc6417 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -834,6 +834,8 @@ static int mb_avg_fragment_size_order(struct super_block *sb, ext4_grpblk_t len) return 0; if (order == MB_NUM_ORDERS(sb)) order--; + if (WARN_ON_ONCE(order > MB_NUM_ORDERS(sb))) + order = MB_NUM_ORDERS(sb) - 1; return order; } @@ -1011,6 +1013,8 @@ static void ext4_mb_choose_next_group_best_avail(struct ext4_allocation_context * goal length. */ order = fls(ac->ac_g_ex.fe_len) - 1; + if (WARN_ON_ONCE(order - 1 > MB_NUM_ORDERS(ac->ac_sb))) + order = MB_NUM_ORDERS(ac->ac_sb); min_order = order - sbi->s_mb_best_avail_max_trim_order; if (min_order < 0) min_order = 0; diff --git a/fs/ext4/sysfs.c b/fs/ext4/sysfs.c index 6d332dff79dd..5f3df2931643 100644 --- a/fs/ext4/sysfs.c +++ b/fs/ext4/sysfs.c @@ -29,6 +29,7 @@ typedef enum { attr_trigger_test_error, attr_first_error_time, attr_last_error_time, + attr_clusters_in_group, attr_feature, attr_pointer_ui, attr_pointer_ul, @@ -207,13 +208,14 @@ EXT4_ATTR_FUNC(sra_exceeded_retry_limit, 0444); EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, inode_readahead, ext4_sb_info, s_inode_readahead_blks); +EXT4_ATTR_OFFSET(mb_group_prealloc, 0644, clusters_in_group, + ext4_sb_info, s_mb_group_prealloc); EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); -EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); EXT4_RW_ATTR_SBI_UI(mb_max_linear_groups, s_mb_max_linear_groups); EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb); EXT4_ATTR(trigger_fs_error, 0200, trigger_test_error); @@ -392,6 +394,7 @@ static ssize_t ext4_attr_show(struct kobject *kobj, (unsigned long long) percpu_counter_sum(&sbi->s_sra_exceeded_retry_limit)); case attr_inode_readahead: + case attr_clusters_in_group: case attr_pointer_ui: if (!ptr) return 0; @@ -468,6 +471,14 @@ static ssize_t ext4_attr_store(struct kobject *kobj, else *((unsigned int *) ptr) = t; return len; + case attr_clusters_in_group: + ret = kstrtouint(skip_spaces(buf), 0, &t); + if (ret) + return ret; + if (t > sbi->s_clusters_per_group) + return -EINVAL; + *((unsigned int *) ptr) = t; + return len; case attr_pointer_ul: if (!ptr) return 0; -- 2.39.2

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[PATCH OLK-6.6 0/1] fix CVE-2024-40934
by Hongbo Li 15 Jul '24

15 Jul '24

Fix CVE-2024-40934. José Expósito (1): HID: logitech-dj: Fix memory leak in logi_dj_recv_switch_to_dj_mode() drivers/hid/hid-logitech-dj.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) -- 2.34.1

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[PATCH openEuler-22.03-LTS-SP1] media: gspca: cpia1: shift-out-of-bounds in set_flicker
by felix 15 Jul '24

15 Jul '24

From: Rajeshwar R Shinde <coolrrsh(a)gmail.com> stable inclusion from stable-v5.10.202 commit c6b6b8692218da73b33b310d7c1df90f115bdd9a category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I9DZOS Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 099be1822d1f095433f4b08af9cc9d6308ec1953 ] Syzkaller reported the following issue: UBSAN: shift-out-of-bounds in drivers/media/usb/gspca/cpia1.c:1031:27 shift exponent 245 is too large for 32-bit type 'int' When the value of the variable "sd->params.exposure.gain" exceeds the number of bits in an integer, a shift-out-of-bounds error is reported. It is triggered because the variable "currentexp" cannot be left-shifted by more than the number of bits in an integer. In order to avoid invalid range during left-shift, the conditional expression is added. Reported-by: syzbot+e27f3dbdab04e43b9f73(a)syzkaller.appspotmail.com Closes: https://lore.kernel.org/all/20230818164522.12806-1-coolrrsh@gmail.com Link: https://syzkaller.appspot.com/bug?extid=e27f3dbdab04e43b9f73 Signed-off-by: Rajeshwar R Shinde <coolrrsh(a)gmail.com> Signed-off-by: Hans Verkuil <hverkuil-cisco(a)xs4all.nl> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: sanglipeng <sanglipeng1(a)jd.com> Signed-off-by: Felix Fu <fuzhen5(a)huawei.com> --- drivers/media/usb/gspca/cpia1.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/media/usb/gspca/cpia1.c b/drivers/media/usb/gspca/cpia1.c index d93d384286c1..de945e13c7c6 100644 --- a/drivers/media/usb/gspca/cpia1.c +++ b/drivers/media/usb/gspca/cpia1.c @@ -18,6 +18,7 @@ #include <linux/input.h> #include <linux/sched/signal.h> +#include <linux/bitops.h> #include "gspca.h" @@ -1027,6 +1028,8 @@ static int set_flicker(struct gspca_dev *gspca_dev, int on, int apply) sd->params.exposure.expMode = 2; sd->exposure_status = EXPOSURE_NORMAL; } + if (sd->params.exposure.gain >= BITS_PER_TYPE(currentexp)) + return -EINVAL; currentexp = currentexp << sd->params.exposure.gain; sd->params.exposure.gain = 0; /* round down current exposure to nearest value */ -- 2.34.1

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[PATCH OLK-5.10 0/1] fix CVE-2024-40934
by Hongbo Li 15 Jul '24

15 Jul '24

Fix CVE-2024-40934. José Expósito (1): HID: logitech-dj: Fix memory leak in logi_dj_recv_switch_to_dj_mode() drivers/hid/hid-logitech-dj.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) -- 2.34.1

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[PATCH OLK-6.6] ALSA: hda: cs35l41: Possible null pointer dereference in cs35l41_hda_unbind()
by Xiongfeng Wang 15 Jul '24

15 Jul '24

From: Simon Trimmer <simont(a)opensource.cirrus.com> mainline inclusion from mainline-v6.10-rc5 commit 6386682cdc8b41319c92fbbe421953e33a28840c category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IACS5R CVE: CVE-2024-40964 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- The cs35l41_hda_unbind() function clears the hda_component entry matching it's index and then dereferences the codec pointer held in the first element of the hda_component array, this is an issue when the device index was 0. Instead use the codec pointer stashed in the cs35l41_hda structure as it will still be valid. Fixes: 7cf5ce66dfda ("ALSA: hda: cs35l41: Add device_link between HDA and cs35l41_hda") Signed-off-by: Simon Trimmer <simont(a)opensource.cirrus.com> Link: https://lore.kernel.org/r/20240531120820.35367-1-simont@opensource.cirrus.c… Signed-off-by: Takashi Iwai <tiwai(a)suse.de> Signed-off-by: Xiongfeng Wang <wangxiongfeng2(a)huawei.com> --- sound/pci/hda/cs35l41_hda.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sound/pci/hda/cs35l41_hda.c b/sound/pci/hda/cs35l41_hda.c index 3c157b006a5a..b437beae9b51 100644 --- a/sound/pci/hda/cs35l41_hda.c +++ b/sound/pci/hda/cs35l41_hda.c @@ -1187,7 +1187,7 @@ static void cs35l41_hda_unbind(struct device *dev, struct device *master, void * if (comps[cs35l41->index].dev == dev) { memset(&comps[cs35l41->index], 0, sizeof(*comps)); sleep_flags = lock_system_sleep(); - device_link_remove(&comps->codec->core.dev, cs35l41->dev); + device_link_remove(&cs35l41->codec->core.dev, cs35l41->dev); unlock_system_sleep(sleep_flags); } } -- 2.20.1

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[PATCH openEuler-22.03-LTS-SP1] selinux: avoid dereference of garbage after mount failure
by felix 15 Jul '24

15 Jul '24

From: Christian Göttsche <cgzones(a)googlemail.com> stable inclusion from stable-v6.6.26 commit 477ed6789eb9f3f4d3568bb977f90c863c12724e category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9QG73 CVE: CVE-2024-35904 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- commit 37801a36b4d68892ce807264f784d818f8d0d39b upstream. In case kern_mount() fails and returns an error pointer return in the error branch instead of continuing and dereferencing the error pointer. While on it drop the never read static variable selinuxfs_mount. Cc: stable(a)vger.kernel.org Fixes: 0619f0f5e36f ("selinux: wrap selinuxfs state") Signed-off-by: Christian Göttsche <cgzones(a)googlemail.com> Signed-off-by: Paul Moore <paul(a)paul-moore.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Conflicts: security/selinux/selinuxfs.c [selinuxfs_mount still in use because of SECURITY_SELINUX_DISABLE, so we reserve it, only deal with kern_mount failure issue] Signed-off-by: Felix Fu <fuzhen5(a)huawei.com> --- security/selinux/selinuxfs.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c index d893c2280f59..97d169679265 100644 --- a/security/selinux/selinuxfs.c +++ b/security/selinux/selinuxfs.c @@ -2232,13 +2232,17 @@ static int __init init_sel_fs(void) pr_err("selinuxfs: could not mount!\n"); err = PTR_ERR(selinuxfs_mount); selinuxfs_mount = NULL; + selinux_null.mnt = NULL; + return err; } + selinux_null.dentry = d_hash_and_lookup(selinux_null.mnt->mnt_root, &null_name); if (IS_ERR(selinux_null.dentry)) { pr_err("selinuxfs: could not lookup null!\n"); err = PTR_ERR(selinux_null.dentry); selinux_null.dentry = NULL; + return err; } return err; -- 2.34.1

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[PATCH OLK-6.6 0/2] nvdimm: Backport some bugfixs
by Zhihao Cheng 15 Jul '24

15 Jul '24

Mathieu Desnoyers (2): nvdimm/pmem: fix leak on dax_add_host() failure dax: alloc_dax() return ERR_PTR(-EOPNOTSUPP) for CONFIG_DAX=n drivers/dax/super.c | 5 +++++ drivers/nvdimm/pmem.c | 3 +-- include/linux/dax.h | 6 +----- 3 files changed, 7 insertions(+), 7 deletions(-) -- 2.31.1

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[PATCH openEuler-22.03-LTS-SP1 0/2] nvdimm: Backport some bugfixs
by Zhihao Cheng 15 Jul '24

15 Jul '24

Luis Chamberlain (1): nvdimm/pmem: use add_disk() error handling Mathieu Desnoyers (1): dax: alloc_dax() return ERR_PTR(-EOPNOTSUPP) for CONFIG_DAX=n drivers/dax/super.c | 5 +++++ drivers/nvdimm/pmem.c | 8 +++++++- include/linux/dax.h | 6 +----- 3 files changed, 13 insertions(+), 6 deletions(-) -- 2.31.1

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[PATCH OLK-5.10 0/2] nvdimm: Backport some bugfixs
by Zhihao Cheng 15 Jul '24

15 Jul '24

Luis Chamberlain (1): nvdimm/pmem: use add_disk() error handling Mathieu Desnoyers (1): dax: alloc_dax() return ERR_PTR(-EOPNOTSUPP) for CONFIG_DAX=n drivers/dax/super.c | 5 +++++ drivers/nvdimm/pmem.c | 8 +++++++- include/linux/dax.h | 6 +----- 3 files changed, 13 insertions(+), 6 deletions(-) -- 2.31.1

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[PATCH openEuler-22.03-LTS-SP1] ALSA: scarlett2: Add clamp() in scarlett2_mixer_ctl_put()
by felix 15 Jul '24

15 Jul '24

From: "Geoffrey D. Bennett" <g(a)b4.vu> stable inclusion from stable-v5.15.148 commit e517645ead5ea22c69d2a44694baa23fe1ce7c2b category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9Q9ID CVE: CVE-2023-52674 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 04f8f053252b86c7583895c962d66747ecdc61b7 ] Ensure the value passed to scarlett2_mixer_ctl_put() is between 0 and SCARLETT2_MIXER_MAX_VALUE so we don't attempt to access outside scarlett2_mixer_values[]. 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/3b19fb3da641b587749b85fe1daa1b4e696c0c1b.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 [Some context inconsistencies exist in the scarlett2_mixer_ctl_put function, which does not affect the patch] Signed-off-by: Felix Fu <fuzhen5(a)huawei.com> --- sound/usb/mixer_scarlett_gen2.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/sound/usb/mixer_scarlett_gen2.c b/sound/usb/mixer_scarlett_gen2.c index 1b7c7b754c38..6b7c8b8d7111 100644 --- a/sound/usb/mixer_scarlett_gen2.c +++ b/sound/usb/mixer_scarlett_gen2.c @@ -1509,7 +1509,8 @@ static int scarlett2_mixer_ctl_put(struct snd_kcontrol *kctl, mutex_lock(&private->data_mutex); oval = private->mix[elem->control]; - val = ucontrol->value.integer.value[0]; + val = clamp(ucontrol->value.integer.value[0], + 0L, (long)SCARLETT2_MIXER_MAX_VALUE); num_mixer_in = ports[SCARLETT2_PORT_TYPE_MIX].num[SCARLETT2_PORT_OUT]; mix_num = elem->control / num_mixer_in; -- 2.34.1

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