KMSAN: uninit-value in xlog_verify

ID	Workflow	Result	Correct	Bug	Created	Started	Finished	Revision	Error
54e54d68	assessment-security	DenialOfService: ❌ Exploitable: ❌ FilesystemTrigger: ✅ NetworkTrigger: ❌ PeripheralTrigger: ✅ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌	❓	KMSAN: uninit-value in xlog_verify_head	2026/05/30 21:38	2026/05/30 21:38	2026/05/30 22:36	6b4a8443
8d464bff	assessment-security		💥	KMSAN: uninit-value in xlog_verify_head	2026/05/14 11:54	2026/05/14 11:54	2026/05/14 11:56	6ccb967e	failed to run ["make" "KERNELVERSION=syzkaller" "KERNELRELEASE=syzkaller" "LOCALVERSION=-syzkaller" "-j" "32" "ARCH=x86_64" "CC=ccache clang" "LD=ld.lld" "O=/app/workdir/cache/build/09d1caa061cb53c83a... truncated to first 200 bytes; open job for full error

Title	Replies (including bot)	Last reply
[PATCH v2] xfs: use null daddr for unset first bad log block	4 (4)	2026/07/01 12:50
[PATCH] xfs: initialize first bad log block in head verification	3 (3)	2026/06/30 10:01
[PATCH] xfs: reject CRC validation when the log header cannot be retrieved	4 (4)	2026/04/07 07:47
[syzbot] [xfs?] KMSAN: uninit-value in xlog_verify_head	0 (1)	2026/04/02 18:55

Title

Replies (including bot)

Last reply

[PATCH v2] xfs: use null daddr for unset first bad log block

4 (4)

2026/07/01 12:50

[PATCH] xfs: initialize first bad log block in head verification

3 (3)

2026/06/30 10:01

[PATCH] xfs: reject CRC validation when the log header cannot be retrieved

4 (4)

2026/04/07 07:47

[syzbot] [xfs?] KMSAN: uninit-value in xlog_verify_head

0 (1)

2026/04/02 18:55

XFS (loop4): Mounting V5 Filesystem d7dc424e-7990-42cb-9f91-9cb7200a101d ===================================================== BUG: KMSAN: uninit-value in xlog_verify_head+0x6c3/0x910 fs/xfs/xfs_log_recover.c:1058 xlog_verify_head+0x6c3/0x910 fs/xfs/xfs_log_recover.c:1058 xlog_find_tail+0xc2e/0x1a50 fs/xfs/xfs_log_recover.c:1315 xlog_recover+0x6d/0x800 fs/xfs/xfs_log_recover.c:3426 xfs_log_mount+0x4da/0x880 fs/xfs/xfs_log.c:617 xfs_mountfs+0x1599/0x2d00 fs/xfs/xfs_mount.c:1034 xfs_fs_fill_super+0x2603/0x2be0 fs/xfs/xfs_super.c:1938 get_tree_bdev_flags+0x6e6/0x920 fs/super.c:1694 get_tree_bdev+0x38/0x50 fs/super.c:1717 xfs_fs_get_tree+0x35/0x40 fs/xfs/xfs_super.c:1985 vfs_get_tree+0xb3/0x5d0 fs/super.c:1754 fc_mount fs/namespace.c:1193 [inline] do_new_mount_fc fs/namespace.c:3763 [inline] do_new_mount+0x885/0x1dd0 fs/namespace.c:3839 path_mount+0x7a2/0x20b0 fs/namespace.c:4159 do_mount fs/namespace.c:4172 [inline] __do_sys_mount fs/namespace.c:4361 [inline] __se_sys_mount+0x704/0x7f0 fs/namespace.c:4338 __ia32_sys_mount+0xe2/0x150 fs/namespace.c:4338 ia32_sys_call+0x27fe/0x4360 arch/x86/include/generated/asm/syscalls_32.h:22 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0x17f/0x3f0 arch/x86/entry/syscall_32.c:307 do_fast_syscall_32+0x37/0x80 arch/x86/entry/syscall_32.c:332 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:370 entry_SYSENTER_compat_after_hwframe+0x84/0x8e Uninit was stored to memory at: xlog_verify_head+0x6bc/0x910 fs/xfs/xfs_log_recover.c:1058 xlog_find_tail+0xc2e/0x1a50 fs/xfs/xfs_log_recover.c:1315 xlog_recover+0x6d/0x800 fs/xfs/xfs_log_recover.c:3426 xfs_log_mount+0x4da/0x880 fs/xfs/xfs_log.c:617 xfs_mountfs+0x1599/0x2d00 fs/xfs/xfs_mount.c:1034 xfs_fs_fill_super+0x2603/0x2be0 fs/xfs/xfs_super.c:1938 get_tree_bdev_flags+0x6e6/0x920 fs/super.c:1694 get_tree_bdev+0x38/0x50 fs/super.c:1717 xfs_fs_get_tree+0x35/0x40 fs/xfs/xfs_super.c:1985 vfs_get_tree+0xb3/0x5d0 fs/super.c:1754 fc_mount fs/namespace.c:1193 [inline] do_new_mount_fc fs/namespace.c:3763 [inline] do_new_mount+0x885/0x1dd0 fs/namespace.c:3839 path_mount+0x7a2/0x20b0 fs/namespace.c:4159 do_mount fs/namespace.c:4172 [inline] __do_sys_mount fs/namespace.c:4361 [inline] __se_sys_mount+0x704/0x7f0 fs/namespace.c:4338 __ia32_sys_mount+0xe2/0x150 fs/namespace.c:4338 ia32_sys_call+0x27fe/0x4360 arch/x86/include/generated/asm/syscalls_32.h:22 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0x17f/0x3f0 arch/x86/entry/syscall_32.c:307 do_fast_syscall_32+0x37/0x80 arch/x86/entry/syscall_32.c:332 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:370 entry_SYSENTER_compat_after_hwframe+0x84/0x8e Local variable tmp_rhead_blk created at: xlog_verify_head+0x81/0x910 fs/xfs/xfs_log_recover.c:1032 xlog_find_tail+0xc2e/0x1a50 fs/xfs/xfs_log_recover.c:1315 CPU: 1 UID: 0 PID: 7664 Comm: syz.4.285 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 =====================================================

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2026/03/29 18:48	upstream	cbfffcca2bf0	356bdfc9	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-kmsan-gce-386-root	KMSAN: uninit-value in xlog_verify_head

Crashes (1):

Assets (help?)