syzbot


general protection fault in free_swap_cache (2)

Status: auto-closed as invalid on 2022/04/07 21:42
Reported-by: syzbot+f86560273c0c1c455aa7@syzkaller.appspotmail.com
First crash: 426d, last: 241d
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream general protection fault in free_swap_cache 5 684d 736d 0/23 auto-closed as invalid on 2021/01/19 22:14

Sample crash report:
general protection fault, probably for non-canonical address 0xdffffc000013a4c9: 0000 [#1] PREEMPT SMP KASAN
KASAN: probably user-memory-access in range [0x00000000009d2648-0x00000000009d264f]
CPU: 1 PID: 13564 Comm: syz-executor.3 Not tainted 5.15.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:_compound_head include/linux/page-flags.h:187 [inline]
RIP: 0010:PageSwapCache include/linux/page-flags.h:404 [inline]
RIP: 0010:free_swap_cache+0x28/0x310 mm/swap_state.c:291
Code: 00 00 41 57 41 56 41 55 41 54 49 89 fc 55 4d 8d 6c 24 08 53 e8 f9 5c c0 ff 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 8f 02 00 00 49 8b 6c 24 08 31 ff 48 89 eb 83 e3
RSP: 0018:ffffc9000cccf6f8 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff888000112128 RCX: 0000000000000000
RDX: 000000000013a4c9 RSI: ffffffff81b67b27 RDI: 00000000009d2640
RBP: 0000000000000023 R08: 00000000000001fe R09: 0000000000000000
R10: ffffffff81b680f2 R11: 0000000000000000 R12: 00000000009d2640
R13: 00000000009d2648 R14: dffffc0000000000 R15: ffffc9000cccfab0
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2c02a000 CR3: 00000000894d6000 CR4: 00000000003526e0
Call Trace:
 free_pages_and_swap_cache+0x58/0x90 mm/swap_state.c:319
 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:242 [inline]
 tlb_flush_mmu+0xe9/0x6b0 mm/mmu_gather.c:249
 zap_pte_range mm/memory.c:1432 [inline]
 zap_pmd_range mm/memory.c:1481 [inline]
 zap_pud_range mm/memory.c:1510 [inline]
 zap_p4d_range mm/memory.c:1531 [inline]
 unmap_page_range+0x1c58/0x2a10 mm/memory.c:1552
 unmap_single_vma+0x198/0x310 mm/memory.c:1597
 unmap_vmas+0x16d/0x2f0 mm/memory.c:1629
 exit_mmap+0x1d0/0x630 mm/mmap.c:3171
 __mmput+0x122/0x4b0 kernel/fork.c:1115
 mmput+0x58/0x60 kernel/fork.c:1136
 exit_mm kernel/exit.c:501 [inline]
 do_exit+0xabc/0x2a30 kernel/exit.c:812
 do_group_exit+0x125/0x310 kernel/exit.c:922
 get_signal+0x47f/0x2160 kernel/signal.c:2868
 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:865
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f1033a7aa39
Code: Unable to access opcode bytes at RIP 0x7f1033a7aa0f.
RSP: 002b:00007f1030ff0218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f1033b7df68 RCX: 00007f1033a7aa39
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f1033b7df68
RBP: 00007f1033b7df60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1033b7df6c
R13: 00007f10340b1b2f R14: 00007f1030ff0300 R15: 0000000000022000
Modules linked in:
---[ end trace f66a07ef667bfbb2 ]---
RIP: 0010:_compound_head include/linux/page-flags.h:187 [inline]
RIP: 0010:PageSwapCache include/linux/page-flags.h:404 [inline]
RIP: 0010:free_swap_cache+0x28/0x310 mm/swap_state.c:291
Code: 00 00 41 57 41 56 41 55 41 54 49 89 fc 55 4d 8d 6c 24 08 53 e8 f9 5c c0 ff 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 8f 02 00 00 49 8b 6c 24 08 31 ff 48 89 eb 83 e3
RSP: 0018:ffffc9000cccf6f8 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff888000112128 RCX: 0000000000000000
RDX: 000000000013a4c9 RSI: ffffffff81b67b27 RDI: 00000000009d2640
RBP: 0000000000000023 R08: 00000000000001fe R09: 0000000000000000
R10: ffffffff81b680f2 R11: 0000000000000000 R12: 00000000009d2640
R13: 00000000009d2648 R14: dffffc0000000000 R15: ffffc9000cccfab0
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f31a2e28000 CR3: 000000006fd46000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	41 57                	push   %r15
   4:	41 56                	push   %r14
   6:	41 55                	push   %r13
   8:	41 54                	push   %r12
   a:	49 89 fc             	mov    %rdi,%r12
   d:	55                   	push   %rbp
   e:	4d 8d 6c 24 08       	lea    0x8(%r12),%r13
  13:	53                   	push   %rbx
  14:	e8 f9 5c c0 ff       	callq  0xffc05d12
  19:	4c 89 ea             	mov    %r13,%rdx
  1c:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  23:	fc ff df
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 8f 02 00 00    	jne    0x2c3
  34:	49 8b 6c 24 08       	mov    0x8(%r12),%rbp
  39:	31 ff                	xor    %edi,%edi
  3b:	48 89 eb             	mov    %rbp,%rbx
  3e:	83                   	.byte 0x83
  3f:	e3                   	.byte 0xe3

Crashes (5):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce 2021/10/22 05:05 upstream 2f111a6fd5b5 55f90bc6 .config log report info general protection fault in free_swap_cache
ci-upstream-kasan-gce-root 2021/07/09 16:59 upstream 3dbdb38e2869 281e815f .config log report info general protection fault in free_swap_cache
ci-upstream-kasan-gce-386 2021/06/07 13:01 upstream 614124bea77e e59537be .config log report info general protection fault in free_swap_cache
ci-upstream-linux-next-kasan-gce-root 2021/12/08 21:41 linux-next 4eee8d0b64ec a4a2a501 .config log report info general protection fault in free_swap_cache
ci-upstream-linux-next-kasan-gce-root 2021/12/03 02:59 linux-next f81e94e91878 61f86278 .config log report info general protection fault in free_swap_cache