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[PATCH OLK-5.10] NFSv4/flexfiles: reject zero filehandle version count
by Zhou Minqiang 14 Aug '26

14 Aug '26

mainline inclusion from mainline-v7.2-rc1 commit 2c6bb3c40bc24f6aa8dfbe6fe98c3ad6389203f2 category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/16112 CVE: CVE-2026-53392 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- ff_layout_alloc_lseg() decodes the filehandle-version array count from the flexfiles layout body. The value is used as the count for kzalloc_objs(), and the current code only rejects NULL. A zero count yields ZERO_SIZE_PTR, which can be stored in dss_info->fh_versions even though later flexfiles paths assume that at least one filehandle version exists. Reject fh_count == 0 before the allocation, matching the existing zero version_count validation in the flexfiles GETDEVICEINFO parser. A QEMU/KASAN run with a malformed flexfiles layout hit: KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] RIP: 0010:ff_layout_encode_ff_layoutupdate.isra.0+0x15f/0x750 ff_layout_encode_layoutreturn+0x683/0x970 nfs4_xdr_enc_layoutreturn+0x278/0x3a0 Kernel panic - not syncing: Fatal exception The patched kernel rejects the malformed layout without KASAN/oops/panic, and a valid fh_count=1 regression still opens, reads, and unmounts cleanly. Cc: stable(a)vger.kernel.org Fixes: d67ae825a59d ("pnfs/flexfiles: Add the FlexFile Layout Driver") Assisted-by: Claude:claude-opus-4-7 Signed-off-by: Michael Bommarito <michael.bommarito(a)gmail.com> Signed-off-by: Anna Schumaker <anna.schumaker(a)hammerspace.com> Signed-off-by: Zhou Minqiang <zhouminqiang2(a)huawei.com> --- fs/nfs/flexfilelayout/flexfilelayout.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c index e4f2820ba5a5..2a9226fe7f36 100644 --- a/fs/nfs/flexfilelayout/flexfilelayout.c +++ b/fs/nfs/flexfilelayout/flexfilelayout.c @@ -454,6 +454,10 @@ ff_layout_alloc_lseg(struct pnfs_layout_hdr *lh, if (!p) goto out_err_free; fh_count = be32_to_cpup(p); + if (fh_count == 0) { + rc = -EINVAL; + goto out_err_free; + } fls->mirror_array[i]->fh_versions = kcalloc(fh_count, sizeof(struct nfs_fh), -- 2.52.0

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[PATCH OLK-5.10] pNFS: Fix use-after-free in pnfs_update_layout()
by Zhou Minqiang 14 Aug '26

14 Aug '26

mainline inclusion from mainline-v7.2-rc1 commit 13e198a90ca4050f4bee8a3f23680389a6563ccc category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/16131 CVE: CVE-2026-63800 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- When hitting the NFS_LAYOUT_RETURN branch in pnfs_update_layout(), the code calls pnfs_prepare_to_retry_layoutget(lo). If it succeeds, pnfs_put_layout_hdr(lo) is called before trace_pnfs_update_layout(), which still references 'lo'. This results in a use-after-free when the tracepoint accesses lo's fields. Fix this by moving the tracepoint call before pnfs_put_layout_hdr(lo). Fixes: 2c8d5fc37fe2 ("pNFS: Stricter ordering of layoutget and layoutreturn") Cc: stable(a)vger.kernel.org Signed-off-by: Wentao Liang <vulab(a)iscas.ac.cn> Signed-off-by: Anna Schumaker <anna.schumaker(a)hammerspace.com> Signed-off-by: Zhou Minqiang <zhouminqiang2(a)huawei.com> --- fs/nfs/pnfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index de00ef7484d8..e1fb295b4f22 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -2078,11 +2078,11 @@ pnfs_update_layout(struct inode *ino, dprintk("%s wait for layoutreturn\n", __func__); lseg = ERR_PTR(pnfs_prepare_to_retry_layoutget(lo)); if (!IS_ERR(lseg)) { - pnfs_put_layout_hdr(lo); dprintk("%s retrying\n", __func__); trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, PNFS_UPDATE_LAYOUT_RETRY); + pnfs_put_layout_hdr(lo); goto lookup_again; } trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg, -- 2.52.0

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[PATCH OLK-5.10] smb/client: fix chown/chgrp with SMB3 POSIX Extensions
by Zhou Minqiang 14 Aug '26

14 Aug '26

mainline inclusion from mainline-v7.2-rc1 commit 760ef2c579c2609cf17fb1cd5392f64d42d43d33 category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/16820 CVE: CVE-2026-64388 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- Ownership (chown) and group (chgrp) modifications were being ignored when mounting with SMB3 POSIX Extensions unless CIFS_MOUNT_CIFS_ACL or CIFS_MOUNT_MODE_FROM_SID were also explicitly set. Fix this by checking for posix_extensions in cifs_setattr_nounix() when updating UID and GID, ensuring that id_mode_to_cifs_acl() is called to map and set the ownership/group information on the server. Cc: stable(a)vger.kernel.org Signed-off-by: Ralph Boehme <slow(a)samba.org> Signed-off-by: Steve French <stfrench(a)microsoft.com> Conflicts: fs/smb/client/inode.c fs/cifs/inode.c [cxt conflicts] Signed-off-by: Zhou Minqiang <zhouminqiang2(a)huawei.com> --- fs/cifs/inode.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index 3f33cdd14b1a..045d77a929df 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -2835,8 +2835,8 @@ cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) if (attrs->ia_valid & ATTR_GID) gid = attrs->ia_gid; - if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) || - (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) { + if ((cifs_sb->mnt_cifs_flags & (CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_MODE_FROM_SID)) || + cifs_sb_master_tcon(cifs_sb)->posix_extensions) { if (uid_valid(uid) || gid_valid(gid)) { rc = id_mode_to_cifs_acl(inode, full_path, NO_CHANGE_64, uid, gid); -- 2.52.0

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[PATCH OLK-6.6] smb/client: fix chown/chgrp with SMB3 POSIX Extensions
by Zhou Minqiang 14 Aug '26

14 Aug '26

mainline inclusion from mainline-v7.2-rc1 commit 760ef2c579c2609cf17fb1cd5392f64d42d43d33 category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/16820 CVE: CVE-2026-64388 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- Ownership (chown) and group (chgrp) modifications were being ignored when mounting with SMB3 POSIX Extensions unless CIFS_MOUNT_CIFS_ACL or CIFS_MOUNT_MODE_FROM_SID were also explicitly set. Fix this by checking for posix_extensions in cifs_setattr_nounix() when updating UID and GID, ensuring that id_mode_to_cifs_acl() is called to map and set the ownership/group information on the server. Cc: stable(a)vger.kernel.org Signed-off-by: Ralph Boehme <slow(a)samba.org> Signed-off-by: Steve French <stfrench(a)microsoft.com> Conflicts: fs/smb/client/inode.c [cxt conflicts] Signed-off-by: Zhou Minqiang <zhouminqiang2(a)huawei.com> --- fs/smb/client/inode.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/smb/client/inode.c b/fs/smb/client/inode.c index cca480ab7e64..f5b50cb65360 100644 --- a/fs/smb/client/inode.c +++ b/fs/smb/client/inode.c @@ -3237,8 +3237,8 @@ cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) if (attrs->ia_valid & ATTR_GID) gid = attrs->ia_gid; - if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) || - (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) { + if ((cifs_sb->mnt_cifs_flags & (CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_MODE_FROM_SID)) || + cifs_sb_master_tcon(cifs_sb)->posix_extensions) { if (uid_valid(uid) || gid_valid(gid)) { mode = NO_CHANGE_64; rc = id_mode_to_cifs_acl(inode, full_path, &mode, -- 2.52.0

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[PATCH OLK-6.6 0/2] CVE-2026-64137
by Yifan Qiao 13 Aug '26

13 Aug '26

Ido Schimmel (1): genetlink: Use internal flags for multicast groups Michael Bommarito (1): smb: client: require net admin for CIFS SWN netlink include/net/genetlink.h | 7 ++++++- fs/smb/client/netlink.c | 6 +++++- net/core/drop_monitor.c | 2 +- net/mptcp/pm_netlink.c | 2 +- net/netlink/genetlink.c | 4 ++-- net/psample/psample.c | 2 +- 6 files changed, 16 insertions(+), 7 deletions(-) -- 2.52.0

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[PATCH OLK-5.10 0/2] fix CVE-2026-45893
by Gu Bowen 13 Aug '26

13 Aug '26

CVE-2026-45893 Helge Deller (2): AppArmor: Allow apparmor to handle unaligned dfa tables apparmor: Fix & Optimize table creation from possibly unaligned memory security/apparmor/include/match.h | 12 +++++++----- security/apparmor/match.c | 22 +++++++++++----------- 2 files changed, 18 insertions(+), 16 deletions(-) -- 2.43.0

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[PATCH OLK-6.6 0/2] CVE-2026-64137
by Yifan Qiao 13 Aug '26

13 Aug '26

Ido Schimmel (1): genetlink: Use internal flags for multicast groups Michael Bommarito (1): smb: client: require net admin for CIFS SWN netlink include/net/genetlink.h | 9 ++++++--- fs/smb/client/netlink.c | 6 +++++- net/core/drop_monitor.c | 2 +- net/mptcp/pm_netlink.c | 2 +- net/netlink/genetlink.c | 4 ++-- net/psample/psample.c | 2 +- 6 files changed, 16 insertions(+), 9 deletions(-) -- 2.52.0

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[PATCH OLK-5.10] ksmbd: defer destroy_previous_session() until after NTLM authentication
by Lai Zewei 12 Aug '26

12 Aug '26

mainline inclusion from mainline-v7.2-rc5 commit c74801ee524f477c174a1899782b6c3b6918d407 category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/16939 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- In ntlm_authenticate(), destroy_previous_session() is called using a user pointer resolved from the client-supplied NTLM blob username field before the NTLMv2 response is validated. An authenticated attacker can set the NTLM blob username to match a victim account and set PreviousSessionId to the victim's session ID; destroy_previous_session() destroys the victim's session while ksmbd_decode_ntlmssp_auth_blob() subsequently rejects the request with -EPERM. Move destroy_previous_session() and the prev_id assignment to after ksmbd_decode_ntlmssp_auth_blob() returns success and use sess->user rather than the pre-authentication lookup result. This matches the ordering already used by krb5_authenticate(), where destroy_previous_session() is called only after ksmbd_krb5_authenticate() returns success. Fixes: e2f34481b24d ("cifsd: add server-side procedures for SMB3") Cc: stable(a)vger.kernel.org Link: https://lore.kernel.org/linux-cifs/20260702155449.3639773-1-james_montgomer… Signed-off-by: James Montgomery <james_montgomery(a)disroot.org> Acked-by: Namjae Jeon <linkinjeon(a)kernel.org> Signed-off-by: Steve French <stfrench(a)microsoft.com> Conflicts: fs/ksmbd/smb2pdu.c [ctx conflicts] Signed-off-by: Lai Zewei <laizewei3(a)huawei.com> --- fs/ksmbd/smb2pdu.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c index ff3bcd2f7c46..d8262429e31b 100644 --- a/fs/ksmbd/smb2pdu.c +++ b/fs/ksmbd/smb2pdu.c @@ -1487,11 +1487,6 @@ static int ntlm_authenticate(struct ksmbd_work *work, return -EPERM; } - /* Check for previous session */ - prev_id = le64_to_cpu(req->PreviousSessionId); - if (prev_id && prev_id != sess->id) - destroy_previous_session(conn, user, prev_id); - if (sess->state == SMB2_SESSION_VALID) { /* * Reuse session if anonymous try to connect @@ -1526,6 +1521,10 @@ static int ntlm_authenticate(struct ksmbd_work *work, } } + prev_id = le64_to_cpu(req->PreviousSessionId); + if (prev_id && prev_id != sess->id) + destroy_previous_session(conn, sess->user, prev_id); + /* * If session state is SMB2_SESSION_VALID, We can assume * that it is reauthentication. And the user/password -- 2.52.0

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[PATCH OLK-6.6] sctp: fix auth_hmacs array size in struct sctp_cookie
by Pu Lehui 12 Aug '26

12 Aug '26

From: Xin Long <lucien.xin(a)gmail.com> stable inclusion from stable-v6.6.148 commit 0b4414e43e0861d67276031cc21401d7e87de3da category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/17108 CVE: CVE-2026-68376 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit e0b5252a59383b77d1b8dbeda00b7184dd95f4d3 ] The auth_hmacs array in struct sctp_cookie is supposed to store a complete SCTP_AUTH_HMAC_ALGO parameter, which consists of a struct sctp_paramhdr followed by N HMAC identifiers. However, the array size was calculated using an extra 2 bytes instead of sizeof(struct sctp_paramhdr), which is 4 bytes. When four HMAC identifiers are configured, the HMAC-ALGO parameter stored in the endpoint is larger than the auth_hmacs buffer in the cookie. As a result, sctp_association_init() copies beyond the end of auth_hmacs when initializing the association, corrupting the adjacent auth_chunks field. This can lead to an invalid HMAC identifier being accepted and later cause an out-of-bounds read in sctp_auth_get_hmac(). Fix the array size calculation by including the full SCTP parameter header size. Fixes: 1f485649f529 ("[SCTP]: Implement SCTP-AUTH internals") Reported-by: Yuan Tan <yuantan098(a)gmail.com> Reported-by: Xin Liu <dstsmallbird(a)foxmail.com> Reported-by: Zihan Xi <xizh2024(a)lzu.edu.cn> Reported-by: Ren Wei <enjou1224z(a)gmail.com> Signed-off-by: Xin Long <lucien.xin(a)gmail.com> Link: https://patch.msgid.link/634a0de0d5de29532915e6d47c92a0cbc206e03f.178370715… Signed-off-by: Paolo Abeni <pabeni(a)redhat.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Pu Lehui <pulehui(a)huawei.com> --- include/net/sctp/structs.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h index d943bb454b17..5baf98eac3db 100644 --- a/include/net/sctp/structs.h +++ b/include/net/sctp/structs.h @@ -322,7 +322,8 @@ struct sctp_cookie { __u8 auth_random[sizeof(struct sctp_paramhdr) + SCTP_AUTH_RANDOM_LENGTH]; - __u8 auth_hmacs[SCTP_AUTH_NUM_HMACS * sizeof(__u16) + 2]; + __u8 auth_hmacs[sizeof(struct sctp_paramhdr) + + SCTP_AUTH_NUM_HMACS * sizeof(__u16)]; __u8 auth_chunks[sizeof(struct sctp_paramhdr) + SCTP_AUTH_MAX_CHUNKS]; /* This is a shim for my peer's INIT packet, followed by -- 2.34.1

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[PATCH OLK-5.10] drm/edid: fix OOB read in drm_parse_tiled_block()
by Hongtao Zhang 12 Aug '26

12 Aug '26

From: Xiang Mei <xmei5(a)asu.edu> stable inclusion from stable-v5.10.261 commit c4ab04ca1bbf87eefa9fec5c80e1880450d2e7c0 category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/16848 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit faaa1e1155833e7d4ce7e3cfaf64c0d636b190db ] drm_parse_tiled_block() casts the DisplayID block to a struct displayid_tiled_block and reads the full fixed layout up to tile->topology_id[7] without checking block->num_bytes. The DisplayID iterator only validates the declared payload length, so a crafted EDID can advertise a tiled-display block (tag DATA_BLOCK_TILED_DISPLAY, or DATA_BLOCK_2_TILED_DISPLAY_TOPOLOGY for v2.0) with a small num_bytes at the end of a DisplayID extension. The read then runs past the end of the exact-sized kmemdup()'d EDID allocation, a heap out-of-bounds read. Reject blocks shorter than the spec's 22-byte tiled payload before reading the fixed struct, as drm_parse_vesa_mso_data() already does. BUG: KASAN: slab-out-of-bounds in drm_edid_connector_update Read of size 2 at addr ffff888010077700 by task exploit/147 dump_stack_lvl (lib/dump_stack.c:94 ...) print_report (mm/kasan/report.c:378 ...) kasan_report (mm/kasan/report.c:595) drm_edid_connector_update (drivers/gpu/drm/drm_edid.c:7581) bochs_connector_helper_get_modes (drivers/gpu/drm/tiny/bochs.c:574) drm_helper_probe_single_connector_modes (drivers/gpu/drm/drm_probe_helper.c:426) status_store (drivers/gpu/drm/drm_sysfs.c:219) ... vfs_write (fs/read_write.c:595 fs/read_write.c:688) ksys_write (fs/read_write.c:740) Fixes: 40d9b043a89e ("drm/connector: store tile information from displayid (v3)") Reported-by: Weiming Shi <bestswngs(a)gmail.com> Assisted-by: Claude:claude-opus-4-8 Signed-off-by: Xiang Mei <xmei5(a)asu.edu> Reviewed-by: Jani Nikula <jani.nikula(a)intel.com> Link: https://patch.msgid.link/20260615184737.899892-1-xmei5@asu.edu Signed-off-by: Jani Nikula <jani.nikula(a)intel.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Zhang Hongtao <zhanghongtao35(a)huawei.com> --- drivers/gpu/drm/drm_edid.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 39eb39e78d7a2..cbe7f79fd0e1e 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -5895,6 +5895,14 @@ static void drm_parse_tiled_block(struct drm_connector *connector, u8 num_v_tile, num_h_tile; struct drm_tile_group *tg; + /* tiled block payload per spec: cap 1 + topo 3 + size 4 + bezel 5 + id 9 = 22 */ + if (block->num_bytes < 22) { + drm_dbg_kms(connector->dev, + "[CONNECTOR:%d:%s] Unexpected tiled block size %u\n", + connector->base.id, connector->name, block->num_bytes); + return; + } + w = tile->tile_size[0] | tile->tile_size[1] << 8; h = tile->tile_size[2] | tile->tile_size[3] << 8; -- 2.43.0

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