slab_pre_alloc_hook mm/slab.h:421 [inline]
 slab_alloc mm/slab.c:3376 [inline]
 kmem_cache_alloc+0x2d7/0x780 mm/slab.c:3550
 kmem_cache_zalloc include/linux/slab.h:651 [inline]
 ext4_init_io_end+0x27/0x100 fs/ext4/page-io.c:253
 ext4_writepages+0x1037/0x2fd0 fs/ext4/inode.c:2837
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5797 at fs/super.c:1163 kill_block_super+0xc9/0xf0 fs/super.c:1163
Kernel panic - not syncing: panic_on_warn set ...

 do_writepages+0xd0/0x250 mm/page-writeback.c:2364
 __filemap_fdatawrite_range+0x23b/0x310 mm/filemap.c:345
 file_write_and_wait_range+0x8d/0xe0 mm/filemap.c:677
 __generic_file_fsync+0x79/0x1a0 fs/libfs.c:977
 ext4_sync_file+0x755/0x12d0 fs/ext4/fsync.c:120
 vfs_fsync_range+0x10e/0x260 fs/sync.c:196
 generic_write_sync include/linux/fs.h:2677 [inline]
 ext4_file_write_iter+0x68a/0xe90 fs/ext4/file.c:279
 call_write_iter include/linux/fs.h:1777 [inline]
 do_iter_readv_writev+0x418/0x670 fs/read_write.c:675
 do_iter_write fs/read_write.c:954 [inline]
 do_iter_write+0x154/0x540 fs/read_write.c:935
 vfs_iter_write+0x77/0xb0 fs/read_write.c:967
 iter_file_splice_write+0x572/0xad0 fs/splice.c:749
 do_splice_from fs/splice.c:851 [inline]
 direct_splice_actor+0x123/0x190 fs/splice.c:1018
 splice_direct_to_actor+0x29e/0x7b0 fs/splice.c:973
 do_splice_direct+0x18d/0x230 fs/splice.c:1061
 do_sendfile+0x4db/0xbd0 fs/read_write.c:1441
 SYSC_sendfile64 fs/read_write.c:1496 [inline]
 SyS_sendfile64+0x9d/0x110 fs/read_write.c:1488
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x459a59
RSP: 002b:00007f6092ba5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f6092ba5c90 RCX: 0000000000459a59
RDX: 0000000020000000 RSI: 0000000000000004 RDI: 0000000000000004
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 00008080fffffffe R11: 0000000000000246 R12: 00007f6092ba66d4
R13: 00000000004c748b R14: 00000000004dd038 R15: 0000000000000005
CPU: 0 PID: 5797 Comm: syz-executor.1 Not tainted 4.14.149 #0
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+0x138/0x197 lib/dump_stack.c:53
 panic+0x1f2/0x426 kernel/panic.c:182
 __warn.cold+0x2f/0x36 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:963
RIP: 0010:kill_block_super+0xc9/0xf0 fs/super.c:1163
RSP: 0018:ffff88805ae07b70 EFLAGS: 00010246
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc9000804e000
RDX: 0000000000040000 RSI: ffffffff818e0379 RDI: ffff88808911fb20
RBP: ffff88805ae07b88 R08: ffff88804ec78080 R09: 0000000000000001
R10: 0000000000000000 R11: ffff88804ec78080 R12: ffff888092e88080
R13: ffff88808911f780 R14: ffff888092e88080 R15: dffffc0000000000
 reiserfs_kill_sb+0x17c/0x1e0 fs/reiserfs/super.c:570
 deactivate_locked_super+0x74/0xe0 fs/super.c:319
 sget_userns+0x9d9/0xc30 fs/super.c:537
 sget+0xd6/0x120 fs/super.c:572
 mount_bdev+0xd5/0x370 fs/super.c:1107
 get_super_block+0x35/0x40 fs/reiserfs/super.c:2605
 mount_fs+0x97/0x2a1 fs/super.c:1237
 vfs_kern_mount.part.0+0x5e/0x3d0 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2549 [inline]
 do_mount+0x417/0x27d0 fs/namespace.c:2879
 SYSC_mount fs/namespace.c:3095 [inline]
 SyS_mount+0xab/0x120 fs/namespace.c:3072
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45c4aa
RSP: 002b:00007fd726182a88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fd726182b40 RCX: 000000000045c4aa
RDX: 00007fd726182ae0 RSI: 0000000020000080 RDI: 00007fd726182b00
RBP: 0000000000000000 R08: 00007fd726182b40 R09: 00007fd726182ae0
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000006
R13: 00000000004c8f13 R14: 00000000004e0398 R15: 0000000000000005
Kernel Offset: disabled
Rebooting in 86400 seconds..