KMSAN: uninit-value in xlog

ID	Workflow	Result	Correct	Bug	Created	Started	Finished	Revision	Error
28ec2f9b-3e97-4147-8445-0d831c2987ae	assessment-security	DenialOfService: ❌ Exploitable: ❌ FilesystemTrigger: ✅ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ✅ UserNamespace: ✅ VMGuestTrigger: ❌ VMHostTrigger: ❌	❓	KMSAN: uninit-value in xlog_sync	2026/05/30 19:04	2026/05/30 19:04	2026/05/30 19:43	6b4a844333e83556da95d61d7f207e7ef5cd4bc6
ec04954e-3d3a-4425-b106-ab1ff874471c	assessment-security		💥	KMSAN: uninit-value in xlog_sync	2026/05/14 11:33	2026/05/14 11:33	2026/05/14 11:34	6ccb967e465e832a7bfd7a116ad00d52a0923a5d	failed to run ["git" "pull" "origin" "HEAD" "--depth=1" "--allow-unrelated-histories"]: exit status 128 From /app/workdir/repo/linux * branch HEAD -> FETCH_HEAD Updating files: ... truncated to first 200 bytes; open job for full error
ae25e52d-30d3-4288-8edb-a0cfb27adaf8	repro		❓	KMSAN: uninit-value in xlog_sync	2026/03/06 14:52	2026/03/06 14:52	2026/03/06 15:02	31e9c887f7dc24e04b3ca70d0d54fc34141844b0

Title	Replies (including bot)	Last reply
[syzbot] Monthly xfs report (Jun 2026)	0 (1)	2026/06/11 12:32
[syzbot] [xfs?] KMSAN: uninit-value in xlog_sync	0 (1)	2026/01/08 02:14

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[syzbot] Monthly xfs report (Jun 2026)

0 (1)

2026/06/11 12:32

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

0 (1)

2026/01/08 02:14

===================================================== BUG: KMSAN: uninit-value in crc32c_arch lib/crc/x86/crc32.h:90 [inline] BUG: KMSAN: uninit-value in crc32c+0x131/0x540 lib/crc/crc32-main.c:86 crc32c_arch lib/crc/x86/crc32.h:90 [inline] crc32c+0x131/0x540 lib/crc/crc32-main.c:86 xfs_start_cksum_update fs/xfs/libxfs/xfs_cksum.h:41 [inline] xlog_cksum fs/xfs/xfs_log.c:1513 [inline] xlog_sync+0x924/0xdb0 fs/xfs/xfs_log.c:1751 xlog_state_release_iclog+0x30b/0x6d0 fs/xfs/xfs_log.c:518 xlog_force_iclog fs/xfs/xfs_log.c:753 [inline] xlog_force_and_check_iclog fs/xfs/xfs_log.c:2751 [inline] xlog_force_lsn+0x8eb/0xbc0 fs/xfs/xfs_log.c:2923 xfs_log_force_seq+0x236/0x6d0 fs/xfs/xfs_log.c:2988 xfs_fsync_flush_log fs/xfs/xfs_file.c:120 [inline] xfs_file_fsync+0x68e/0xe00 fs/xfs/xfs_file.c:163 vfs_fsync_range+0x135/0x1c0 fs/sync.c:186 generic_write_sync include/linux/fs.h:2654 [inline] iomap_dio_complete+0xf01/0x13a0 fs/iomap/direct-io.c:152 iomap_dio_rw+0x13c/0x180 fs/iomap/direct-io.c:905 xfs_file_dio_write_aligned+0x506/0x840 fs/xfs/xfs_file.c:780 xfs_file_dio_write fs/xfs/xfs_file.c:989 [inline] xfs_file_write_iter+0xff0/0x1090 fs/xfs/xfs_file.c:1201 iter_file_splice_write+0x12d8/0x20c0 fs/splice.c:736 do_splice_from fs/splice.c:936 [inline] direct_splice_actor+0x31a/0x7d0 fs/splice.c:1159 splice_direct_to_actor+0x9a3/0x1560 fs/splice.c:1103 do_splice_direct_actor fs/splice.c:1202 [inline] do_splice_direct+0x1e0/0x350 fs/splice.c:1228 do_sendfile+0x9fc/0x1130 fs/read_write.c:1372 __do_sys_sendfile64 fs/read_write.c:1433 [inline] __se_sys_sendfile64+0x1ea/0x290 fs/read_write.c:1419 __x64_sys_sendfile64+0xbd/0x120 fs/read_write.c:1419 x64_sys_call+0x3aa4/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:41 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15d/0x3c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was stored to memory at: xlog_pack_data+0x257/0x450 fs/xfs/xfs_log.c:1487 xlog_sync+0x175/0xdb0 fs/xfs/xfs_log.c:1733 xlog_state_release_iclog+0x30b/0x6d0 fs/xfs/xfs_log.c:518 xlog_force_iclog fs/xfs/xfs_log.c:753 [inline] xlog_force_and_check_iclog fs/xfs/xfs_log.c:2751 [inline] xlog_force_lsn+0x8eb/0xbc0 fs/xfs/xfs_log.c:2923 xfs_log_force_seq+0x236/0x6d0 fs/xfs/xfs_log.c:2988 xfs_fsync_flush_log fs/xfs/xfs_file.c:120 [inline] xfs_file_fsync+0x68e/0xe00 fs/xfs/xfs_file.c:163 vfs_fsync_range+0x135/0x1c0 fs/sync.c:186 generic_write_sync include/linux/fs.h:2654 [inline] iomap_dio_complete+0xf01/0x13a0 fs/iomap/direct-io.c:152 iomap_dio_rw+0x13c/0x180 fs/iomap/direct-io.c:905 xfs_file_dio_write_aligned+0x506/0x840 fs/xfs/xfs_file.c:780 xfs_file_dio_write fs/xfs/xfs_file.c:989 [inline] xfs_file_write_iter+0xff0/0x1090 fs/xfs/xfs_file.c:1201 iter_file_splice_write+0x12d8/0x20c0 fs/splice.c:736 do_splice_from fs/splice.c:936 [inline] direct_splice_actor+0x31a/0x7d0 fs/splice.c:1159 splice_direct_to_actor+0x9a3/0x1560 fs/splice.c:1103 do_splice_direct_actor fs/splice.c:1202 [inline] do_splice_direct+0x1e0/0x350 fs/splice.c:1228 do_sendfile+0x9fc/0x1130 fs/read_write.c:1372 __do_sys_sendfile64 fs/read_write.c:1433 [inline] __se_sys_sendfile64+0x1ea/0x290 fs/read_write.c:1419 __x64_sys_sendfile64+0xbd/0x120 fs/read_write.c:1419 x64_sys_call+0x3aa4/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:41 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15d/0x3c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was stored to memory at: xlog_write_iovec fs/xfs/xfs_log.c:1913 [inline] xlog_write_full fs/xfs/xfs_log.c:1940 [inline] xlog_write+0x1a75/0x20f0 fs/xfs/xfs_log.c:2180 xlog_cil_write_chain fs/xfs/xfs_log_cil.c:1175 [inline] xlog_cil_push_work+0x355c/0x5080 fs/xfs/xfs_log_cil.c:1518 process_one_work kernel/workqueue.c:3314 [inline] process_scheduled_works+0xb65/0x1e40 kernel/workqueue.c:3397 worker_thread+0xee4/0x1590 kernel/workqueue.c:3478 kthread+0x53a/0x5f0 kernel/kthread.c:436 ret_from_fork+0x20f/0x8d0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Uninit was stored to memory at: xlog_format_copy fs/xfs/xfs_log.h:78 [inline] xfs_inode_item_format_data_fork+0x3ba/0xc00 fs/xfs/xfs_inode_item.c:376 xfs_inode_item_format+0x1fb4/0x2280 fs/xfs/xfs_inode_item.c:672 xlog_cil_insert_format_items fs/xfs/xfs_log_cil.c:603 [inline] xlog_cil_insert_items fs/xfs/xfs_log_cil.c:654 [inline] xlog_cil_commit+0x18ad/0x47d0 fs/xfs/xfs_log_cil.c:1841 __xfs_trans_commit+0x55a/0xf40 fs/xfs/xfs_trans.c:868 xfs_trans_commit+0x227/0x270 fs/xfs/xfs_trans.c:926 xfs_iomap_write_unwritten+0x921/0x10e0 fs/xfs/xfs_iomap.c:700 xfs_dio_write_end_io+0x7fc/0xc40 fs/xfs/xfs_file.c:682 iomap_dio_complete+0x183/0x13a0 fs/iomap/direct-io.c:112 iomap_dio_rw+0x13c/0x180 fs/iomap/direct-io.c:905 xfs_file_dio_write_aligned+0x506/0x840 fs/xfs/xfs_file.c:780 xfs_file_dio_write fs/xfs/xfs_file.c:989 [inline] xfs_file_write_iter+0xff0/0x1090 fs/xfs/xfs_file.c:1201 iter_file_splice_write+0x12d8/0x20c0 fs/splice.c:736 do_splice_from fs/splice.c:936 [inline] direct_splice_actor+0x31a/0x7d0 fs/splice.c:1159 splice_direct_to_actor+0x9a3/0x1560 fs/splice.c:1103 do_splice_direct_actor fs/splice.c:1202 [inline] do_splice_direct+0x1e0/0x350 fs/splice.c:1228 do_sendfile+0x9fc/0x1130 fs/read_write.c:1372 __do_sys_sendfile64 fs/read_write.c:1433 [inline] __se_sys_sendfile64+0x1ea/0x290 fs/read_write.c:1419 __x64_sys_sendfile64+0xbd/0x120 fs/read_write.c:1419 x64_sys_call+0x3aa4/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:41 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15d/0x3c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: slab_post_alloc_hook mm/slub.c:4577 [inline] slab_alloc_node mm/slub.c:4899 [inline] __do_kmalloc_node mm/slub.c:5295 [inline] __kmalloc_node_track_caller_noprof+0x4f6/0x1750 mm/slub.c:5408 __do_krealloc mm/slub.c:6711 [inline] krealloc_node_align_noprof+0x515/0xf20 mm/slub.c:6770 xfs_broot_realloc+0x361/0x480 fs/xfs/libxfs/xfs_inode_fork.c:431 xfs_bmap_broot_realloc+0x243/0x650 fs/xfs/libxfs/xfs_bmap_btree.c:-1 xfs_bmap_extents_to_btree+0x1f8/0x1430 fs/xfs/libxfs/xfs_bmap.c:660 xfs_bmap_add_extent_hole_real+0x2267/0x3040 fs/xfs/libxfs/xfs_bmap.c:2791 xfs_bmapi_allocate+0x48d2/0x4f50 fs/xfs/libxfs/xfs_bmap.c:3977 xfs_bmapi_write+0x10a9/0x26f0 fs/xfs/libxfs/xfs_bmap.c:4267 xfs_iomap_write_direct+0x6f0/0xa50 fs/xfs/xfs_iomap.c:338 xfs_direct_write_iomap_begin+0x1a37/0x2570 fs/xfs/xfs_iomap.c:1012 iomap_iter+0x9a6/0x14a0 fs/iomap/iter.c:110 __iomap_dio_rw+0x14e8/0x3990 fs/iomap/direct-io.c:806 iomap_dio_rw+0x5d/0x180 fs/iomap/direct-io.c:901 xfs_file_dio_write_aligned+0x506/0x840 fs/xfs/xfs_file.c:780 xfs_file_dio_write fs/xfs/xfs_file.c:989 [inline] xfs_file_write_iter+0xff0/0x1090 fs/xfs/xfs_file.c:1201 iter_file_splice_write+0x12d8/0x20c0 fs/splice.c:736 do_splice_from fs/splice.c:936 [inline] direct_splice_actor+0x31a/0x7d0 fs/splice.c:1159 splice_direct_to_actor+0x9a3/0x1560 fs/splice.c:1103 do_splice_direct_actor fs/splice.c:1202 [inline] do_splice_direct+0x1e0/0x350 fs/splice.c:1228 do_sendfile+0x9fc/0x1130 fs/read_write.c:1372 __do_sys_sendfile64 fs/read_write.c:1433 [inline] __se_sys_sendfile64+0x1ea/0x290 fs/read_write.c:1419 __x64_sys_sendfile64+0xbd/0x120 fs/read_write.c:1419 x64_sys_call+0x3aa4/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:41 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15d/0x3c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 0 UID: 0 PID: 11335 Comm: syz.7.876 Tainted: G L syzkaller #0 PREEMPT(lazy) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 =====================================================

Crashes (3):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Assets (help?)	Manager	Title
2026/06/07 20:15	upstream	979c294509f9	cc095639	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci-upstream-kmsan-gce-root	KMSAN: uninit-value in xlog_sync
2026/03/16 04:09	upstream	f338e7738378	ee8d34d6	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci-upstream-kmsan-gce-root	KMSAN: uninit-value in xlog_sync
2026/01/04 02:11	upstream	aacb0a6d604a	d6526ea3	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci-upstream-kmsan-gce-root	KMSAN: uninit-value in xlog_sync

Crashes (3):

Assets (help?)