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BUG: KMSAN: uninit-value in f2fs_lookup+0xe05/0x1a80 fs/f2fs/namei.c:503
CPU: 1 PID: 10868 Comm: syz-executor.4 Not tainted 5.9.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x21c/0x280 lib/dump_stack.c:118
 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:122
 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:219
 f2fs_lookup+0xe05/0x1a80 fs/f2fs/namei.c:503
 __lookup_slow+0x616/0x810 fs/namei.c:1544
 lookup_slow fs/namei.c:1561 [inline]
 walk_component+0x70a/0xbb0 fs/namei.c:1860
 lookup_last fs/namei.c:2309 [inline]
 path_lookupat+0x34f/0x1100 fs/namei.c:2333
 filename_lookup+0x313/0xc40 fs/namei.c:2366
 kern_path+0xd1/0xe0 fs/namei.c:2453
 unix_find_other+0x178/0x1050 net/unix/af_unix.c:938
 unix_stream_connect+0x89a/0x2980 net/unix/af_unix.c:1275
 p9_fd_create_unix+0x322/0x700 net/9p/trans_fd.c:1045
 p9_client_create+0x10e5/0x1640 net/9p/client.c:1039
 v9fs_session_init+0x2ae/0x2cd0 fs/9p/v9fs.c:406
 v9fs_mount+0x186/0x1340 fs/9p/vfs_super.c:124
 legacy_get_tree+0x163/0x2e0 fs/fs_context.c:592
 vfs_get_tree+0xd8/0x5d0 fs/super.c:1547
 do_new_mount fs/namespace.c:2875 [inline]
 path_mount+0x3d1a/0x5d40 fs/namespace.c:3192
 do_mount+0x1c6/0x220 fs/namespace.c:3205
 __do_compat_sys_mount fs/compat.c:122 [inline]
 __se_compat_sys_mount+0x7b5/0xaa0 fs/compat.c:89
 __ia32_compat_sys_mount+0x62/0x80 fs/compat.c:89
 do_syscall_32_irqs_on arch/x86/entry/common.c:80 [inline]
 __do_fast_syscall_32+0x129/0x180 arch/x86/entry/common.c:139
 do_fast_syscall_32+0x6a/0xc0 arch/x86/entry/common.c:162
 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:205
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf7f55549
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000f552e0cc EFLAGS: 00000296 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00000000200000c0 RCX: 0000000020000400
RDX: 0000000020000440 RSI: 0000000000000008 RDI: 0000000020000480
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000

Local variable ----page@f2fs_lookup created at:
 f2fs_lookup+0x8f/0x1a80 fs/f2fs/namei.c:477
 f2fs_lookup+0x8f/0x1a80 fs/f2fs/namei.c:477
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