general protection fault in release_pages

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 66eee64b2354 Add linux-next specific files for 20230201
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=16945263480000
kernel config: https://syzkaller.appspot.com/x/.config?x=e14cff5442dd778f
dashboard link: https://syzkaller.appspot.com/bug?extid=4ad3b163a657be4e4007
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
CC: [ak...@linux-foundation.org linux-...@vger.kernel.org linu...@kvack.org]

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/4c0a2e6bd806/disk-66eee64b.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/f943ad925f61/vmlinux-66eee64b.xz
kernel image: https://storage.googleapis.com/syzbot-assets/5783dedaf307/bzImage-66eee64b.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4ad3b1...@syzkaller.appspotmail.com

general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 1 PID: 9815 Comm: syz-executor.1 Not tainted 6.2.0-rc6-next-20230201-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
RIP: 0010:_compound_head include/linux/page-flags.h:251 [inline]
RIP: 0010:release_pages+0x226/0x1330 mm/swap.c:1003
Code: ce d0 ff 48 89 d8 48 c1 e8 03 42 80 3c 30 00 0f 85 52 0e 00 00 48 8b 2b 49 89 ed 49 83 e5 fc 49 8d 7d 08 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 50 0e 00 00 49 8b 45 08 31 ff 49 89 c4 48 89
RSP: 0018:ffffc9000459f578 EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffff88807949e2c8 RCX: 0000000000000000
RDX: ffff88803f4bd7c0 RSI: ffffffff81b3fc9f RDI: 0000000000000008
RBP: 0000000000000000 R08: 0000000000000004 R09: 00000000000001fe
R10: 0000000000000057 R11: 0000000000000000 R12: 0000000000000007
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000057
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020049030 CR3: 0000000029993000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
tlb_batch_pages_flush+0xa8/0x1a0 mm/mmu_gather.c:97
zap_pte_range mm/memory.c:1487 [inline]
zap_pmd_range mm/memory.c:1536 [inline]
zap_pud_range mm/memory.c:1565 [inline]
zap_p4d_range mm/memory.c:1586 [inline]
unmap_page_range+0x2605/0x3ce0 mm/memory.c:1607
unmap_single_vma+0x194/0x2a0 mm/memory.c:1653
unmap_vmas+0x234/0x380 mm/memory.c:1692
exit_mmap+0x190/0x7d0 mm/mmap.c:3036
__mmput+0x128/0x4c0 kernel/fork.c:1209
mmput+0x60/0x70 kernel/fork.c:1231
exit_mm kernel/exit.c:563 [inline]
do_exit+0x9d7/0x2b60 kernel/exit.c:856
do_group_exit+0xd4/0x2a0 kernel/exit.c:1019
get_signal+0x2321/0x25b0 kernel/signal.c:2859
arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:306
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297
do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f34b2c8beb7
Code: Unable to access opcode bytes at 0x7f34b2c8be8d.
RSP: 002b:00007f34b3a4e1e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f34b2c8beb7
RDX: 0000000000000000 RSI: 0000000000006364 RDI: 00000000000000d8
RBP: 0000000000000000 R08: 00007f34b3a4e700 R09: 00007f34b3a4e700
R10: 00007f34b3a4e9d0 R11: 0000000000000246 R12: 00007ffd3b4d4d5e
R13: 00007ffd3b4d4d5f R14: 00007f34b3a4e300 R15: 0000000000022000
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:_compound_head include/linux/page-flags.h:251 [inline]
RIP: 0010:release_pages+0x226/0x1330 mm/swap.c:1003
Code: ce d0 ff 48 89 d8 48 c1 e8 03 42 80 3c 30 00 0f 85 52 0e 00 00 48 8b 2b 49 89 ed 49 83 e5 fc 49 8d 7d 08 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 50 0e 00 00 49 8b 45 08 31 ff 49 89 c4 48 89
RSP: 0018:ffffc9000459f578 EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffff88807949e2c8 RCX: 0000000000000000
RDX: ffff88803f4bd7c0 RSI: ffffffff81b3fc9f RDI: 0000000000000008
RBP: 0000000000000000 R08: 0000000000000004 R09: 00000000000001fe
R10: 0000000000000057 R11: 0000000000000000 R12: 0000000000000007
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000057
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020389030 CR3: 000000007d998000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
0: d0 ff sar %bh
2: 48 89 d8 mov %rbx,%rax
5: 48 c1 e8 03 shr $0x3,%rax
9: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1)
e: 0f 85 52 0e 00 00 jne 0xe66
14: 48 8b 2b mov (%rbx),%rbp
17: 49 89 ed mov %rbp,%r13
1a: 49 83 e5 fc and $0xfffffffffffffffc,%r13
1e: 49 8d 7d 08 lea 0x8(%r13),%rdi
22: 48 89 f8 mov %rdi,%rax
25: 48 c1 e8 03 shr $0x3,%rax
* 29: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction
2e: 0f 85 50 0e 00 00 jne 0xe84
34: 49 8b 45 08 mov 0x8(%r13),%rax
38: 31 ff xor %edi,%edi
3a: 49 89 c4 mov %rax,%r12
3d: 48 rex.W
3e: 89 .byte 0x89


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.