syzbot


general protection fault in free_swap_cache

Status: auto-closed as invalid on 2021/01/19 22:14
Reported-by: syzbot+10e0e0681594086f6872@syzkaller.appspotmail.com
First crash: 789d, last: 734d
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream general protection fault in free_swap_cache (2) 5 291d 471d 0/24 auto-closed as invalid on 2022/04/07 21:42

Sample crash report:
general protection fault, probably for non-canonical address 0xdffffc0000467899: 0000 [#1] PREEMPT SMP KASAN
KASAN: probably user-memory-access in range [0x000000000233c4c8-0x000000000233c4cf]
CPU: 1 PID: 1812 Comm: syz-executor.1 Not tainted 5.9.0-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:182 [inline]
RIP: 0010:PageSwapCache include/linux/page-flags.h:391 [inline]
RIP: 0010:free_swap_cache+0x28/0x300 mm/swap_state.c:325
Code: c3 90 41 57 41 56 41 55 41 54 49 89 fc 55 4d 8d 6c 24 08 53 e8 89 5e c6 ff 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 85 02 00 00 4d 8b 74 24 08 31 ff 4c 89 e5 4c 89
RSP: 0018:ffffc9000927f6d0 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff888000184518 RCX: ffffffff81b019f2
RDX: 0000000000467899 RSI: ffffffff81afdfb7 RDI: 000000000233c4c0
RBP: 00000000000000a1 R08: 0000000000000000 R09: ffffea000233c487
R10: 00000000000001fe R11: 0000000000000000 R12: 000000000233c4c0
R13: 000000000233c4c8 R14: dffffc0000000000 R15: ffffc9000927fa80
FS:  0000000000000000(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000748d58 CR3: 00000000a05c4000 CR4: 00000000001526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 free_pages_and_swap_cache+0x58/0x90 mm/swap_state.c:353
 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:1159 [inline]
 zap_pmd_range mm/memory.c:1197 [inline]
 zap_pud_range mm/memory.c:1226 [inline]
 zap_p4d_range mm/memory.c:1247 [inline]
 unmap_page_range+0x1e97/0x2bf0 mm/memory.c:1268
 unmap_single_vma+0x198/0x300 mm/memory.c:1313
 unmap_vmas+0x168/0x2e0 mm/memory.c:1345
 exit_mmap+0x2b1/0x530 mm/mmap.c:3183
 __mmput+0x122/0x470 kernel/fork.c:1076
 mmput+0x53/0x60 kernel/fork.c:1097
 exit_mm kernel/exit.c:483 [inline]
 do_exit+0xa8b/0x29f0 kernel/exit.c:793
 do_group_exit+0x125/0x310 kernel/exit.c:903
 get_signal+0x428/0x1f00 kernel/signal.c:2757
 arch_do_signal+0x82/0x2520 arch/x86/kernel/signal.c:811
 exit_to_user_mode_loop kernel/entry/common.c:161 [inline]
 exit_to_user_mode_prepare+0x1ae/0x200 kernel/entry/common.c:192
 syscall_exit_to_user_mode+0x7e/0x2e0 kernel/entry/common.c:267
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d5f9
Code: Bad RIP value.
RSP: 002b:00007f1b9241dcf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000118cfe8 RCX: 000000000045d5f9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000118cfe8
RBP: 000000000118cfe0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cfec
R13: 000000000169fb6f R14: 00007f1b9241e9c0 R15: 000000000118cfec
Modules linked in:
---[ end trace ba252f16d0b46d75 ]---
RIP: 0010:compound_head include/linux/page-flags.h:182 [inline]
RIP: 0010:PageSwapCache include/linux/page-flags.h:391 [inline]
RIP: 0010:free_swap_cache+0x28/0x300 mm/swap_state.c:325
Code: c3 90 41 57 41 56 41 55 41 54 49 89 fc 55 4d 8d 6c 24 08 53 e8 89 5e c6 ff 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 85 02 00 00 4d 8b 74 24 08 31 ff 4c 89 e5 4c 89
RSP: 0018:ffffc9000927f6d0 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff888000184518 RCX: ffffffff81b019f2
RDX: 0000000000467899 RSI: ffffffff81afdfb7 RDI: 000000000233c4c0
RBP: 00000000000000a1 R08: 0000000000000000 R09: ffffea000233c487
R10: 00000000000001fe R11: 0000000000000000 R12: 000000000233c4c0
R13: 000000000233c4c8 R14: dffffc0000000000 R15: ffffc9000927fa80
FS:  0000000000000000(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd0ac782000 CR3: 000000009f070000 CR4: 00000000001526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (5):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce 2020/09/21 22:13 upstream ba4f184e126b 9e1fa68e .config log report info
ci-upstream-kasan-gce-selinux-root 2020/09/08 05:41 upstream f4d51dffc6c0 abf9ba4f .config log report
ci-upstream-kasan-gce-root 2020/08/28 17:26 upstream 15bc20c6af4c d5a3ae1f .config log report
ci-upstream-kasan-gce 2020/08/24 13:31 upstream d012a7190fc1 67b599d1 .config log report
ci-upstream-kasan-gce-386 2020/07/28 19:22 upstream 92ed30191993 cb93dc6a .config log report
* Struck through repros no longer work on HEAD.