general protection fault, probably for non-canonical address 0xdffffc00000000bd: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000005e8-0x00000000000005ef]
CPU: 1 PID: 9829 Comm: kworker/u4:12 Not tainted 5.14.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: writeback wb_workfn (flush-8:0)
RIP: 0010:mm_has_notifiers include/linux/mmu_notifier.h:283 [inline]
RIP: 0010:mmu_notifier_invalidate_range_start+0x7e/0xf0 include/linux/mmu_notifier.h:457
Code: 08 4d 8d 7e 08 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 61 ba 0c 00 bb e8 05 00 00 49 03 1f 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 43 ba 0c 00 48 83 3b 00 74 27 e8
RSP: 0018:ffffc9000492e778 EFLAGS: 00010206
RAX: 00000000000000bd RBX: 00000000000005e8 RCX: ffff8880197789f0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000492e988 R08: dffffc0000000000 R09: fffffbfff1fa2fc3
R10: fffffbfff1fa2fc3 R11: 0000000000000000 R12: dffffc0000000000
R13: ffffc9000492e890 R14: ffffc9000492e8e0 R15: ffffc9000492e8e8
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000034a15000 CR4: 00000000001526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
page_mkclean_one+0x325/0x7a0 mm/rmap.c:921
rmap_walk_file+0x413/0x610 mm/rmap.c:2352
rmap_walk mm/rmap.c:2370 [inline]
page_mkclean+0x32c/0x460 mm/rmap.c:1003
clear_page_dirty_for_io+0x392/0x960 mm/page-writeback.c:2727
mpage_submit_page fs/ext4/inode.c:2086 [inline]
mpage_process_page_bufs+0x7cf/0xae0 fs/ext4/inode.c:2220
mpage_prepare_extent_to_map+0xa4e/0xe90 fs/ext4/inode.c:2632
ext4_writepages+0xc2d/0x4080 fs/ext4/inode.c:2760
do_writepages+0x49d/0x760 mm/page-writeback.c:2364
__writeback_single_inode+0xd4/0x590 fs/fs-writeback.c:1616
writeback_sb_inodes+0xd29/0x29e0 fs/fs-writeback.c:1881
__writeback_inodes_wb fs/fs-writeback.c:1950 [inline]
wb_writeback+0x515/0x9b0 fs/fs-writeback.c:2055
wb_check_old_data_flush fs/fs-writeback.c:2155 [inline]
wb_do_writeback fs/fs-writeback.c:2208 [inline]
wb_workfn+0xad5/0x1430 fs/fs-writeback.c:2237
process_one_work+0x853/0x1140 kernel/workqueue.c:2297
worker_thread+0xac1/0x1320 kernel/workqueue.c:2444
kthread+0x453/0x480 kernel/kthread.c:319
ret_from_fork+0x1f/0x30
Modules linked in:
---[ end trace 93924d210b7cb848 ]---
RIP: 0010:mm_has_notifiers include/linux/mmu_notifier.h:283 [inline]
RIP: 0010:mmu_notifier_invalidate_range_start+0x7e/0xf0 include/linux/mmu_notifier.h:457
Code: 08 4d 8d 7e 08 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 61 ba 0c 00 bb e8 05 00 00 49 03 1f 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 43 ba 0c 00 48 83 3b 00 74 27 e8
RSP: 0018:ffffc9000492e778 EFLAGS: 00010206
RAX: 00000000000000bd RBX: 00000000000005e8 RCX: ffff8880197789f0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000492e988 R08: dffffc0000000000 R09: fffffbfff1fa2fc3
R10: fffffbfff1fa2fc3 R11: 0000000000000000 R12: dffffc0000000000
R13: ffffc9000492e890 R14: ffffc9000492e8e0 R15: ffffc9000492e8e8
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f033bde8718 CR3: 0000000150dca000 CR4: 00000000001526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 08 4d 8d or %cl,-0x73(%rbp)
3: 7e 08 jle 0xd
5: 4c 89 f8 mov %r15,%rax
8: 48 c1 e8 03 shr $0x3,%rax
c: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1)
11: 74 08 je 0x1b
13: 4c 89 ff mov %r15,%rdi
16: e8 61 ba 0c 00 callq 0xcba7c
1b: bb e8 05 00 00 mov $0x5e8,%ebx
20: 49 03 1f add (%r15),%rbx
23: 48 89 d8 mov %rbx,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction
2f: 74 08 je 0x39
31: 48 89 df mov %rbx,%rdi
34: e8 43 ba 0c 00 callq 0xcba7c
39: 48 83 3b 00 cmpq $0x0,(%rbx)
3d: 74 27 je 0x66
3f: e8 .byte 0xe8