Hello, syzbot found the following issue on: HEAD commit: 81af97bdef5e printk: Export console trace point for kcsan/.. git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=178eaf77c80000 kernel config: https://syzkaller.appspot.com/x/.config?x=60f9227cd7ef4e36 dashboard link: https://syzkaller.appspot.com/bug?extid=a6d6b8fffa294705dbd8 compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/959cdbc34509/disk-81af97bd.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/21bf12585d87/vmlinux-81af97bd.xz kernel image: https://storage.googleapis.com/syzbot-assets/d46348c365bd/bzImage-81af97bd.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a6d6b8fffa294705dbd8@xxxxxxxxxxxxxxxxxxxxxxxxx XFS: attr2 mount option is deprecated. XFS (loop3): Mounting V5 Filesystem a2f82aab-77f8-4286-afd4-a8f747a74bab XFS (loop3): Ending clean mount XFS (loop3): Quotacheck needed: Please wait. ===================================================== BUG: KMSAN: uninit-value in crc32_body lib/crc32.c:112 [inline] BUG: KMSAN: uninit-value in crc32_le_generic lib/crc32.c:179 [inline] BUG: KMSAN: uninit-value in __crc32c_le_base+0x467/0xd80 lib/crc32.c:201 crc32_body lib/crc32.c:112 [inline] crc32_le_generic lib/crc32.c:179 [inline] __crc32c_le_base+0x467/0xd80 lib/crc32.c:201 chksum_update+0x5b/0xd0 crypto/crc32c_generic.c:88 crypto_shash_update+0x28f/0x400 crypto/shash.c:121 crc32c+0xd9/0x1a0 lib/libcrc32c.c:47 xlog_cksum fs/xfs/xfs_log.c:1867 [inline] xlog_sync+0xf66/0x11e0 fs/xfs/xfs_log.c:2111 xlog_state_release_iclog+0x3d0/0x7e0 fs/xfs/xfs_log.c:619 xlog_force_iclog fs/xfs/xfs_log.c:888 [inline] xlog_force_and_check_iclog fs/xfs/xfs_log.c:3172 [inline] xfs_log_force+0x9d3/0xf20 fs/xfs/xfs_log.c:3249 xfs_qm_dqflush+0x11d9/0x17f0 fs/xfs/xfs_dquot.c:1293 xfs_qm_flush_one+0x148/0x5b0 fs/xfs/xfs_qm.c:1260 xfs_qm_dquot_walk+0x2be/0x7b0 fs/xfs/xfs_qm.c:87 xfs_qm_quotacheck+0x4e1/0xb20 fs/xfs/xfs_qm.c:1338 xfs_qm_mount_quotas+0x3ef/0x890 fs/xfs/xfs_qm.c:1457 xfs_mountfs+0x2184/0x2410 fs/xfs/xfs_mount.c:959 xfs_fs_fill_super+0x1fb3/0x22b0 fs/xfs/xfs_super.c:1677 get_tree_bdev+0x890/0xd10 fs/super.c:1303 xfs_fs_get_tree+0x34/0x40 fs/xfs/xfs_super.c:1724 vfs_get_tree+0xa5/0x500 fs/super.c:1510 do_new_mount+0x69a/0x1580 fs/namespace.c:3042 path_mount+0x725/0x1ee0 fs/namespace.c:3372 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount+0x734/0x840 fs/namespace.c:3571 __ia32_sys_mount+0xe3/0x150 fs/namespace.c:3571 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246 entry_SYSENTER_compat_after_hwframe+0x70/0x82 Uninit was stored to memory at: xlog_write_iovec fs/xfs/xfs_log.c:2259 [inline] xlog_write_full fs/xfs/xfs_log.c:2294 [inline] xlog_write+0x1c3c/0x21a0 fs/xfs/xfs_log.c:2563 xlog_cil_write_chain fs/xfs/xfs_log_cil.c:973 [inline] xlog_cil_push_work+0x30c7/0x4430 fs/xfs/xfs_log_cil.c:1318 process_one_work+0xb0d/0x1410 kernel/workqueue.c:2390 worker_thread+0x107e/0x1d60 kernel/workqueue.c:2537 kthread+0x31f/0x430 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Uninit was created at: slab_post_alloc_hook+0x12d/0xb60 mm/slab.h:774 slab_alloc_node mm/slub.c:3452 [inline] __kmem_cache_alloc_node+0x518/0x920 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:966 [inline] __kmalloc+0x121/0x3c0 mm/slab_common.c:980 kmalloc include/linux/slab.h:584 [inline] xlog_kvmalloc fs/xfs/xfs_log_priv.h:700 [inline] xlog_cil_alloc_shadow_bufs fs/xfs/xfs_log_cil.c:338 [inline] xlog_cil_commit+0x493/0x4c80 fs/xfs/xfs_log_cil.c:1629 __xfs_trans_commit+0x78e/0x13d0 fs/xfs/xfs_trans.c:1005 xfs_trans_roll+0x10a/0x6e0 fs/xfs/xfs_trans.c:1153 xfs_defer_trans_roll+0x10f/0x590 fs/xfs/libxfs/xfs_defer.c:366 xfs_defer_finish_noroll+0x49d/0x2d40 fs/xfs/libxfs/xfs_defer.c:551 __xfs_trans_commit+0x979/0x13d0 fs/xfs/xfs_trans.c:970 xfs_trans_commit+0x2f/0x40 fs/xfs/xfs_trans.c:1049 xfs_dquot_disk_alloc+0xd4f/0x11a0 fs/xfs/xfs_dquot.c:384 xfs_qm_dqread+0x149/0x950 fs/xfs/xfs_dquot.c:665 xfs_qm_dqget+0x32c/0xb40 fs/xfs/xfs_dquot.c:870 xfs_qm_quotacheck_dqadjust+0xc4/0x860 fs/xfs/xfs_qm.c:1085 xfs_qm_dqusage_adjust+0x51b/0x910 fs/xfs/xfs_qm.c:1190 xfs_iwalk_ag_recs+0x5ca/0xa50 fs/xfs/xfs_iwalk.c:220 xfs_iwalk_run_callbacks+0x27f/0x590 fs/xfs/xfs_iwalk.c:376 xfs_iwalk_ag+0xee3/0x1080 fs/xfs/xfs_iwalk.c:482 xfs_iwalk_ag_work+0x207/0x300 fs/xfs/xfs_iwalk.c:624 xfs_pwork_work+0x97/0x2b0 fs/xfs/xfs_pwork.c:47 process_one_work+0xb0d/0x1410 kernel/workqueue.c:2390 worker_thread+0x107e/0x1d60 kernel/workqueue.c:2537 kthread+0x31f/0x430 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 CPU: 1 PID: 5349 Comm: syz-executor.3 Not tainted 6.3.0-syzkaller-g81af97bdef5e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 ===================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to change bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
