syzbot

XFS (loop4): Mounting V5 Filesystem d7dc424e-7990-42cb-9f91-9cb7200a101d
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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
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