loop0: detected capacity change from 0 to 128
=======================================================
WARNING: The mand mount option has been deprecated and
and is ignored by this kernel. Remove the mand
option from the mount to silence this warning.
=======================================================
EXT4-fs (loop0): Test dummy encryption mode enabled
EXT4-fs (loop0): mounted filesystem 76b65be2-f6da-4727-8c75-0525a5b65a09 r/w without journal. Quota mode: none.
ext4 filesystem being mounted at /0/mnt supports timestamps until 2038-01-19 (0x7fffffff)
fscrypt: AES-256-XTS using implementation "xts-aes-aesni-avx"
fscrypt: AES-256-CBC-CTS using implementation "cts-cbc-aes-aesni"
loop0: detected capacity change from 128 to 64
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5321 at mm/page-writeback.c:2716 __folio_mark_dirty+0x202/0xe30 mm/page-writeback.c:2716
Modules linked in:
CPU: 0 UID: 0 PID: 5321 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__folio_mark_dirty+0x202/0xe30 mm/page-writeback.c:2716
Code: 3c 20 00 74 08 48 89 df e8 7b be 2a 00 4c 8b 33 4c 89 f6 48 83 e6 08 31 ff e8 6a 84 c3 ff 49 83 e6 08 75 20 e8 7f 7f c3 ff 90 <0f> 0b 90 eb 1a e8 74 7f c3 ff 48 8b 2c 24 e9 74 07 00 00 e8 66 7f
RSP: 0018:ffffc9000d41ed90 EFLAGS: 00010093
RAX: ffffffff81fc9421 RBX: ffffea000000fdc0 RCX: ffff888000558000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8880120f97d8 R08: ffffea000000fdc7 R09: 1ffffd4000001fb8
R10: dffffc0000000000 R11: fffff94000001fb9 R12: dffffc0000000000
R13: ffff8880120f97e0 R14: 0000000000000000 R15: 0000000000000001
FS: 00007fde3e4526c0(0000) GS:ffff88808d733000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000008cc CR3: 0000000011b22000 CR4: 0000000000352ef0
Call Trace:
<TASK>
block_dirty_folio+0x17a/0x1d0 fs/buffer.c:754
ext4_block_page_mkwrite fs/ext4/inode.c:6649 [inline]
ext4_page_mkwrite+0xf07/0x1190 fs/ext4/inode.c:6746
do_page_mkwrite+0x14d/0x310 mm/memory.c:3488
wp_page_shared mm/memory.c:3889 [inline]
do_wp_page+0x268d/0x5800 mm/memory.c:4108
handle_pte_fault mm/memory.c:6193 [inline]
__handle_mm_fault+0x1033/0x5400 mm/memory.c:6318
handle_mm_fault+0x40a/0x8e0 mm/memory.c:6487
do_user_addr_fault+0x764/0x1380 arch/x86/mm/fault.c:1387
handle_page_fault arch/x86/mm/fault.c:1476 [inline]
exc_page_fault+0x82/0x100 arch/x86/mm/fault.c:1532
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0010:rep_movs_alternative+0x11/0x90 arch/x86/lib/copy_user_64.S:47
Code: e9 04 32 04 00 cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 83 f9 40 73 44 83 f9 08 73 25 85 c9 74 0f 8a 06 <88> 07 48 ff c7 48 ff c6 48 ff c9 75 f1 e9 cd 31 04 00 66 2e 0f 1f
RSP: 0018:ffffc9000d41f5a8 EFLAGS: 00050202
RAX: ffffffff848b144d RBX: 0000000000000004 RCX: 0000000000000004
RDX: 0000000000000000 RSI: ffffc9000d41fac0 RDI: 00002000000008cc
RBP: ffffc9000d41fb30 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52001a83f58 R12: 00002000000008d0
R13: 00007ffffffff000 R14: ffffc9000d41fac0 R15: 00002000000008cc
copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline]
raw_copy_to_user arch/x86/include/asm/uaccess_64.h:147 [inline]
_inline_copy_to_user include/linux/uaccess.h:197 [inline]
_copy_to_user+0x8a/0xb0 lib/usercopy.c:26
copy_to_user include/linux/uaccess.h:225 [inline]
copy_to_sockptr_offset include/linux/sockptr.h:114 [inline]
copy_to_bpfptr_offset include/linux/bpfptr.h:65 [inline]
bpf_check+0x131d7/0x1d720 kernel/bpf/verifier.c:24710
bpf_prog_load+0x13ba/0x19e0 kernel/bpf/syscall.c:3077
__sys_bpf+0x507/0x860 kernel/bpf/syscall.c:6149
__do_sys_bpf kernel/bpf/syscall.c:6259 [inline]
__se_sys_bpf kernel/bpf/syscall.c:6257 [inline]
__x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6257
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fde3d58efc9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fde3e452038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fde3d7e5fa0 RCX: 00007fde3d58efc9
RDX: 0000000000000094 RSI: 0000200000000840 RDI: 0000000000000005
RBP: 00007fde3d611f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fde3d7e6038 R14: 00007fde3d7e5fa0 R15: 00007fffae89b978
</TASK>
----------------
Code disassembly (best guess):
0: e9 04 32 04 00 jmp 0x43209
5: cc int3
6: cc int3
7: cc int3
8: cc int3
9: 90 nop
a: 90 nop
b: 90 nop
c: 90 nop
d: 90 nop
e: 90 nop
f: 90 nop
10: 90 nop
11: 90 nop
12: 90 nop
13: 90 nop
14: 90 nop
15: 90 nop
16: 90 nop
17: 90 nop
18: 90 nop
19: 48 83 f9 40 cmp $0x40,%rcx
1d: 73 44 jae 0x63
1f: 83 f9 08 cmp $0x8,%ecx
22: 73 25 jae 0x49
24: 85 c9 test %ecx,%ecx
26: 74 0f je 0x37
28: 8a 06 mov (%rsi),%al
* 2a: 88 07 mov %al,(%rdi) <-- trapping instruction
2c: 48 ff c7 inc %rdi
2f: 48 ff c6 inc %rsi
32: 48 ff c9 dec %rcx
35: 75 f1 jne 0x28
37: e9 cd 31 04 00 jmp 0x43209
3c: 66 data16
3d: 2e cs
3e: 0f .byte 0xf
3f: 1f (bad)