audit: type=1400 audit(1601534726.524:8): avc:  denied  { execmem } for  pid=6361 comm="syz-executor065" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0)
F2FS-fs (loop0): Can't find valid F2FS filesystem in 2th superblock
F2FS-fs (loop0): invalid crc value
------------[ cut here ]------------
kernel BUG at fs/f2fs/node.c:1031!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 6361 Comm: syz-executor065 Not tainted 4.14.198-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880974da680 task.stack: ffff8880978e0000
RIP: 0010:remove_inode_page+0x578/0x610 fs/f2fs/node.c:1031
RSP: 0018:ffff8880978e7918 EFLAGS: 00010297
RAX: ffff8880974da680 RBX: 1ffff11012f1cf23 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffea00022d1540 RDI: ffff8880826c58c0
RBP: ffff8880826c57f0 R08: 0000000000000000 R09: 0000000000000003
R10: 0000000000000000 R11: ffff8880974da680 R12: 0000000000000000
R13: ffff8880978e7948 R14: 0000000000006000 R15: dffffc0000000000
FS:  0000000001ba4880(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000043f010 CR3: 000000008911c000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 f2fs_evict_inode+0xc2e/0x1070 fs/f2fs/inode.c:576
 evict+0x2c8/0x700 fs/inode.c:555
 iput_final fs/inode.c:1524 [inline]
 iput+0x458/0x7e0 fs/inode.c:1551
 f2fs_fill_super+0x4084/0x56a0 fs/f2fs/super.c:2629
 mount_bdev+0x2b3/0x360 fs/super.c:1134
 mount_fs+0x92/0x2a0 fs/super.c:1237
 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2549 [inline]
 do_mount+0xe53/0x2a00 fs/namespace.c:2879
 SYSC_mount fs/namespace.c:3095 [inline]
 SyS_mount+0xa8/0x120 fs/namespace.c:3072
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x4471fa
RSP: 002b:00007ffc92946db8 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffc92946e10 RCX: 00000000004471fa
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffc92946dd0
RBP: 00007ffc92946dd0 R08: 00007ffc92946e10 R09: 00007ffc00000015
R10: 0000000000000000 R11: 0000000000000297 R12: 000000000000000f
R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003
Code: 0f 0b e8 dc bc a4 fe 49 8d 6d ff e9 0f fd ff ff e8 ce bc a4 fe 48 c7 c6 60 f6 db 86 48 89 ef e8 5f 0b c3 fe 0f 0b e8 b8 bc a4 fe <0f> 0b e8 f1 8f ce fe e9 f2 fa ff ff e8 e7 8f ce fe e9 d0 fc ff 
RIP: remove_inode_page+0x578/0x610 fs/f2fs/node.c:1031 RSP: ffff8880978e7918
---[ end trace ba39d18b5e1a08aa ]---