WARNING in untrack_pfn

Status: upstream: reported C repro on 2019/08/13 08:40
Reported-by: syzbot+828439ed929a21ca9cad@syzkaller.appspotmail.com
First crash: 2544d, last: 1283d
Fix bisection the fix commit could be any of (bisect log):
  01fd1694b93c Linux 4.14.141
  56dfe6252c68 Linux 4.14.188
   
▶ ▼ Similar bugs (10)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in untrack_pfn kernel -1 syz, C done error 128 857d 2929d 0/29 auto-obsoleted due to no activity on 2024/07/03 15:42
android-49 WARNING in untrack_pfn -1 syz 35 2431d 2665d 0/3 public: reported syz repro on 2019/04/14 09:28
linux-5.15 WARNING in untrack_pfn origin:lts-only -1 syz, C done 10 42d 1108d 0/3 upstream: reported C repro on 2023/07/19 07:05
linux-4.19 WARNING in untrack_pfn -1 syz, C error 24 1290d 2552d 0/1 upstream: reported C repro on 2019/08/05 09:38
android-6-12 WARNING in untrack_pfn origin:downstream -1 syz, C 9 10d 407d 0/1 premoderation: reported C repro on 2025/06/19 03:53
android-44 WARNING in untrack_pfn -1 syz, C 211 2697d 3070d 0/2 closed as invalid on 2019/03/16 01:21
android-414 WARNING in untrack_pfn -1 syz 1 2777d 2666d 0/1 public: reported syz repro on 2019/04/13 00:01
linux-6.1 WARNING in untrack_pfn (2) origin:lts-only -1 syz, C done 6 242d 1061d 0/3 upstream: reported C repro on 2023/09/04 06:46
linux-6.1 WARNING in untrack_pfn -1 2 1195d 1203d 0/3 auto-obsoleted due to no activity on 2023/08/21 02:48
android-44 WARNING in untrack_pfn (2) -1 syz, C 71 2431d 2668d 0/2 public: reported C repro on 2019/04/11 08:44
▶ ▼ Fix bisection attempts (8)
Created Duration User Patch Repo Result
2020/07/15 04:06 32m bisect fix linux-4.14.y OK (2) job log
2020/06/15 03:18 25m bisect fix linux-4.14.y OK (0) job log log
2020/05/15 23:11 26m bisect fix linux-4.14.y OK (0) job log log
2020/04/15 22:46 24m bisect fix linux-4.14.y OK (0) job log log
2020/03/16 22:22 24m bisect fix linux-4.14.y OK (0) job log log
2020/02/15 21:57 24m bisect fix linux-4.14.y OK (0) job log log
2020/01/16 20:56 25m bisect fix linux-4.14.y OK (0) job log log
2019/12/17 20:32 24m bisect fix linux-4.14.y OK (0) job log log

Sample crash report:
RDX: 0000000000000000 RSI: 0000000000000060 RDI: 0000000000000000
RBP: 00007fff4c651ef0 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
------------[ cut here ]------------
WARNING: CPU: 0 PID: 7999 at arch/x86/mm/pat.c:1020 untrack_pfn+0x203/0x250 arch/x86/mm/pat.c:1020
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 7999 Comm: syz-executor168 Not tainted 4.14.304-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x20/0x44 kernel/panic.c:547
 report_bug+0x208/0x250 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:967
RIP: 0010:untrack_pfn+0x203/0x250 arch/x86/mm/pat.c:1020
RSP: 0018:ffff888095adf9c0 EFLAGS: 00010297
RAX: ffff8880974f0100 RBX: ffff8880b3159108 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000020000000 RDI: ffff888095adf880
RBP: 1ffff11012b5bf38 R08: ffff888095adf948 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8880b3159158
 unmap_single_vma+0x16b/0x2b0 mm/memory.c:1579
 unmap_vmas+0x9d/0x160 mm/memory.c:1630
 exit_mmap+0x270/0x4d0 mm/mmap.c:3078
 __mmput kernel/fork.c:931 [inline]
 mmput kernel/fork.c:952 [inline]
 mmput+0xfa/0x420 kernel/fork.c:947
 dup_mm kernel/fork.c:1216 [inline]
 copy_mm kernel/fork.c:1255 [inline]
 copy_process.part.0+0x4dc5/0x71c0 kernel/fork.c:1791
 copy_process kernel/fork.c:1606 [inline]
 _do_fork+0x184/0xc80 kernel/fork.c:2092
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7ff2d6a7c6b9
RSP: 002b:00007fff4c651ed8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007ff2d6a7c6b9
RDX: 0000000000000000 RSI: 0000000000000060 RDI: 0000000000000000
RBP: 00007fff4c651ef0 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (27):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/01/25 06:06 linux-4.14.y 3949d1610004 9dfcf09c .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-4-14 WARNING in untrack_pfn
2022/10/09 19:28 linux-4.14.y 9d5c0b3a8e1a aea5da89 .config console log report syz C [disk image] [vmlinux] ci2-linux-4-14 WARNING in untrack_pfn
2022/06/15 07:31 linux-4.14.y 1ccc597f801c 127d1faf .config console log report syz C ci2-linux-4-14 WARNING in untrack_pfn
2019/09/05 11:37 linux-4.14.y 01fd1694b93c 040fda58 .config console log report syz ci2-linux-4-14
2019/09/03 22:31 linux-4.14.y 01fd1694b93c 48448e71 .config console log report syz ci2-linux-4-14
2019/08/26 10:18 linux-4.14.y b5260801526c d21c5d9d .config console log report syz ci2-linux-4-14
2019/08/25 19:10 linux-4.14.y b5260801526c d21c5d9d .config console log report syz ci2-linux-4-14
2019/08/25 08:04 linux-4.14.y 45f092f9e9cb d21c5d9d .config console log report syz ci2-linux-4-14
2019/08/24 17:23 linux-4.14.y 45f092f9e9cb 78ded196 .config console log report syz ci2-linux-4-14
2019/08/21 21:29 linux-4.14.y 45f092f9e9cb 4ea67ff8 .config console log report syz ci2-linux-4-14
2019/08/20 15:38 linux-4.14.y 45f092f9e9cb cfc9868f .config console log report syz ci2-linux-4-14
2019/08/16 23:44 linux-4.14.y 45f092f9e9cb 8fd428a1 .config console log report syz ci2-linux-4-14
2019/08/13 08:06 linux-4.14.y 3ffe1e79c174 8620c2c2 .config console log report syz ci2-linux-4-14
2022/03/13 09:37 linux-4.14.y af48f51cb593 9e8eaa75 .config console log report info ci2-linux-4-14 WARNING in untrack_pfn
2019/10/11 09:15 linux-4.14.y 42327896f194 1a3bad90 .config console log report ci2-linux-4-14
2019/09/27 07:23 linux-4.14.y f6e27dbb1afa 2f1548bc .config console log report ci2-linux-4-14
2019/09/14 02:57 linux-4.14.y e2cd24b62938 32d59357 .config console log report ci2-linux-4-14
2019/09/05 11:10 linux-4.14.y 01fd1694b93c 040fda58 .config console log report ci2-linux-4-14
2019/09/03 22:05 linux-4.14.y 01fd1694b93c 48448e71 .config console log report ci2-linux-4-14
2019/08/26 09:52 linux-4.14.y b5260801526c d21c5d9d .config console log report ci2-linux-4-14
2019/08/25 07:37 linux-4.14.y 45f092f9e9cb d21c5d9d .config console log report ci2-linux-4-14
2019/08/24 16:54 linux-4.14.y 45f092f9e9cb 78ded196 .config console log report ci2-linux-4-14
2019/08/23 11:54 linux-4.14.y 45f092f9e9cb ca6f3cfa .config console log report ci2-linux-4-14
2019/08/21 21:07 linux-4.14.y 45f092f9e9cb 4ea67ff8 .config console log report ci2-linux-4-14
2019/08/20 15:15 linux-4.14.y 45f092f9e9cb cfc9868f .config console log report ci2-linux-4-14
2019/08/16 23:16 linux-4.14.y 45f092f9e9cb 8fd428a1 .config console log report ci2-linux-4-14
2019/08/13 07:39 linux-4.14.y 3ffe1e79c174 8620c2c2 .config console log report ci2-linux-4-14
* Struck through repros no longer work on HEAD.