audit: type=1400 audit(1556176623.238:247): avc:  denied  { map } for  pid=15042 comm="syz-executor.5" path="/root/syzkaller-testdir884044855/syzkaller.4LKcXm/365/bus" dev="sda1" ino=16540 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1
------------[ cut here ]------------
WARNING: CPU: 0 PID: 15044 at fs/direct-io.c:293 dio_complete+0x671/0x800 fs/direct-io.c:293
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 15044 Comm: syz-executor.5 Not tainted 4.14.113 #3
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x138/0x19c lib/dump_stack.c:53
 panic+0x1f2/0x438 kernel/panic.c:182
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
 __warn.cold+0x2f/0x34 kernel/panic.c:546
 report_bug+0x216/0x254 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x1bb/0x310 arch/x86/kernel/traps.c:295
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:944
RIP: 0010:dio_complete+0x671/0x800 fs/direct-io.c:293
RSP: 0018:ffff88808ac37678 EFLAGS: 00010216
RAX: 0000000000040000 RBX: 00000000000bfe00 RCX: ffffc90005e3d000
RDX: 0000000000012f49 RSI: ffffffff819ae051 RDI: ffff888050dd37bc
RBP: ffff88808ac376c0 R08: ffff88809fbd8680 R09: 0000000000000003
R10: 0000000000000000 R11: ffff88809fbd8680 R12: ffff8880a5e5bb40
R13: 00000000000bfe00 R14: ffff888050dd39b8 R15: 0000000000000000
 do_blockdev_direct_IO+0x530e/0x7fc0 fs/direct-io.c:1374
 __blockdev_direct_IO+0xa1/0xd0 fs/direct-io.c:1400
 ext4_direct_IO_write fs/ext4/inode.c:3697 [inline]
 ext4_direct_IO+0x70d/0x1890 fs/ext4/inode.c:3827
 generic_file_direct_write+0x1ec/0x430 mm/filemap.c:2927
 __generic_file_write_iter+0x2bc/0x5b0 mm/filemap.c:3106
 ext4_file_write_iter+0x2c0/0xfd0 fs/ext4/file.c:264
 call_write_iter include/linux/fs.h:1774 [inline]
 new_sync_write fs/read_write.c:469 [inline]
 __vfs_write+0x4ae/0x6c0 fs/read_write.c:482
 vfs_write+0x198/0x500 fs/read_write.c:544
 SYSC_write fs/read_write.c:589 [inline]
 SyS_write+0xb8/0x180 fs/read_write.c:581
 do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x458d99
RSP: 002b:00007efef6942c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458d99
RDX: 00000000000bfe00 RSI: 0000000020000200 RDI: 0000000000000006
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007efef69436d4
R13: 00000000004c8825 R14: 00000000004defa0 R15: 00000000ffffffff
CPU: 1 PID: 15064 Comm: syz-executor.1 Not tainted 4.14.113 #3
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x138/0x19c lib/dump_stack.c:53
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail.cold+0x10f/0x159 lib/fault-inject.c:149
 should_failslab+0xdb/0x130 mm/failslab.c:32
 slab_pre_alloc_hook mm/slab.h:421 [inline]
 slab_alloc mm/slab.c:3376 [inline]
 kmem_cache_alloc+0x2d9/0x780 mm/slab.c:3550
 kmem_cache_zalloc include/linux/slab.h:651 [inline]
 alloc_buffer_head+0x24/0xe0 fs/buffer.c:3425
 alloc_page_buffers+0xb7/0x200 fs/buffer.c:874
 create_empty_buffers+0x39/0x480 fs/buffer.c:1579
 create_page_buffers+0x153/0x1c0 fs/buffer.c:1696
 __block_write_begin_int+0x195/0x1100 fs/buffer.c:2006
 __block_write_begin fs/buffer.c:2077 [inline]
 block_write_begin+0x5f/0x190 fs/buffer.c:2136
 cont_write_begin+0x430/0x770 fs/buffer.c:2486
 fat_write_begin+0x8d/0x120 fs/fat/inode.c:222
 generic_perform_write+0x1ff/0x490 mm/filemap.c:3024
 __generic_file_write_iter+0x239/0x5b0 mm/filemap.c:3149
 generic_file_write_iter+0x303/0x660 mm/filemap.c:3177
 call_write_iter include/linux/fs.h:1774 [inline]
 new_sync_write fs/read_write.c:469 [inline]
 __vfs_write+0x4ae/0x6c0 fs/read_write.c:482
 vfs_write+0x198/0x500 fs/read_write.c:544
 SYSC_write fs/read_write.c:589 [inline]
 SyS_write+0xb8/0x180 fs/read_write.c:581
 do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x458d99
RSP: 002b:00007f74eb33cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f74eb33cc90 RCX: 0000000000458d99
RDX: 00000000ffffff35 RSI: 0000000020000140 RDI: 0000000000000005
RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f74eb33d6d4
R13: 00000000004c87ee R14: 00000000004def58 R15: 0000000000000007
Kernel Offset: disabled
Rebooting in 86400 seconds..