f2fs_msg: 1 callbacks suppressed
F2FS-fs (loop4): Magic Mismatch, valid(0xf2f52010) - read(0x0)
------------[ cut here ]------------
F2FS-fs (loop4): Can't find valid F2FS filesystem in 1th superblock
WARNING: CPU: 0 PID: 27922 at fs/overlayfs/file.c:58 ovl_change_flags fs/overlayfs/file.c:58 [inline]
WARNING: CPU: 0 PID: 27922 at fs/overlayfs/file.c:58 ovl_real_fdget_meta.cold+0x11/0x1e fs/overlayfs/file.c:109
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 27922 Comm: syz-executor.0 Not tainted 4.19.105-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+0x197/0x210 lib/dump_stack.c:118
 panic+0x26a/0x50e kernel/panic.c:186
 __warn.cold+0x20/0x53 kernel/panic.c:541
 report_bug+0x263/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x204/0x360 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
F2FS-fs (loop4): Wrong segment_count / block_count (22 > 8192)
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1037
RIP: 0010:ovl_change_flags fs/overlayfs/file.c:58 [inline]
RIP: 0010:ovl_real_fdget_meta.cold+0x11/0x1e fs/overlayfs/file.c:109
Code: e9 b3 fd ff ff e8 ac bc 3f ff e9 fb fd ff ff e8 a2 bc 3f ff e9 15 fe ff ff e8 e8 1e 08 ff 48 c7 c7 60 f1 d4 87 e8 30 7f f2 fe <0f> 0b 41 bc fb ff ff ff e9 98 c6 ff ff e8 ca 1e 08 ff 48 c7 c7 60
RSP: 0018:ffff88802b417ba0 EFLAGS: 00010282
RAX: 0000000000000024 RBX: 0000000004048000 RCX: 0000000000000000
F2FS-fs (loop4): Can't find valid F2FS filesystem in 2th superblock
RDX: 0000000000000000 RSI: ffffffff81554f86 RDI: ffffed1005682f66
RBP: ffff88802b417bd0 R08: 0000000000000024 R09: ffffed1015d05079
R10: ffffed1015d05078 R11: ffff8880ae8283c7 R12: 000000000000a000
R13: ffff8880455440c0 R14: ffff888045544138 R15: ffff888055da04f0
 ovl_real_fdget fs/overlayfs/file.c:116 [inline]
 ovl_read_iter+0x11a/0x363 fs/overlayfs/file.c:241
 call_read_iter include/linux/fs.h:1814 [inline]
 new_sync_read fs/read_write.c:406 [inline]
 __vfs_read+0x584/0x800 fs/read_write.c:418
F2FS-fs (loop4): Magic Mismatch, valid(0xf2f52010) - read(0x0)
 vfs_read+0x194/0x3d0 fs/read_write.c:452
 ksys_read+0x14f/0x2d0 fs/read_write.c:579
F2FS-fs (loop4): Can't find valid F2FS filesystem in 1th superblock
 __do_sys_read fs/read_write.c:589 [inline]
 __se_sys_read fs/read_write.c:587 [inline]
 __x64_sys_read+0x73/0xb0 fs/read_write.c:587
F2FS-fs (loop4): Wrong segment_count / block_count (22 > 8192)
 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c429
F2FS-fs (loop4): Can't find valid F2FS filesystem in 2th superblock
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f59cb397c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f59cb3986d4 RCX: 000000000045c429
RDX: 0000000000000008 RSI: 0000000020000040 RDI: 0000000000000003
RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000000000000087b R14: 00000000004caed7 R15: 000000000076bf2c
Kernel Offset: disabled
Rebooting in 86400 seconds..