syzbot


WARNING in untrack_pfn

Status: premoderation: reported C repro on 2025/06/19 03:53
Reported-by: syzbot+f25bf7dc5c1889fcc642@syzkaller.appspotmail.com
First crash: 1d21h, last: 1d21h
Similar bugs (10)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in untrack_pfn kernel C done error 128 452d 2524d 0/29 auto-obsoleted due to no activity on 2024/07/03 15:42
android-49 WARNING in untrack_pfn syz 35 2026d 2259d 0/3 public: reported syz repro on 2019/04/14 09:28
linux-5.15 WARNING in untrack_pfn origin:lts-only C done 9 19d 702d 0/3 upstream: reported C repro on 2023/07/19 07:05
linux-4.19 WARNING in untrack_pfn C error 24 885d 2146d 0/1 upstream: reported C repro on 2019/08/05 09:38
linux-4.14 WARNING in untrack_pfn C inconclusive 27 877d 2138d 0/1 upstream: reported C repro on 2019/08/13 08:40
android-44 WARNING in untrack_pfn C 211 2292d 2665d 0/2 closed as invalid on 2019/03/16 01:21
android-414 WARNING in untrack_pfn syz 1 2372d 2261d 0/1 public: reported syz repro on 2019/04/13 00:01
linux-6.1 WARNING in untrack_pfn (2) origin:lts-only C done 4 532d 655d 0/3 upstream: reported C repro on 2023/09/04 06:46
linux-6.1 WARNING in untrack_pfn 2 789d 797d 0/3 auto-obsoleted due to no activity on 2023/08/21 02:48
android-44 WARNING in untrack_pfn (2) C 71 2026d 2262d 0/2 public: reported C repro on 2019/04/11 08:44

Sample crash report:
R10: 0000000000000011 R11: 0000000000000246 R12: 0000000000005271
R13: 00007ffdb0a26554 R14: 00007ffdb0a26580 R15: 00007ffdb0a26570
 </TASK>
------------[ cut here ]------------
WARNING: CPU: 0 PID: 307 at arch/x86/mm/pat/memtype.c:983 get_pat_info arch/x86/mm/pat/memtype.c:983 [inline]
WARNING: CPU: 0 PID: 307 at arch/x86/mm/pat/memtype.c:983 untrack_pfn+0x450/0x540 arch/x86/mm/pat/memtype.c:1098
Modules linked in:
CPU: 0 UID: 0 PID: 307 Comm: syz-executor176 Not tainted 6.12.23-syzkaller-g30b14cdad458 #0 c708c6bafa1314b3e84c64b9f03b67766970ebbd
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:get_pat_info arch/x86/mm/pat/memtype.c:983 [inline]
RIP: 0010:untrack_pfn+0x450/0x540 arch/x86/mm/pat/memtype.c:1098
Code: 00 00 fc ff df 0f 84 a8 00 00 00 e8 7a 5f 3f 00 4c 8b 74 24 10 4d 85 f6 0f 85 bf fe ff ff e8 67 5f 3f 00 eb 47 e8 60 5f 3f 00 <0f> 0b 49 bd 00 00 00 00 00 fc ff df eb 34 e8 4d 5f 3f 00 4c 8b 7c
RSP: 0018:ffffc9000112f380 EFLAGS: 00010293
RAX: ffffffff81461df0 RBX: 1ffff92000225e74 RCX: ffff8881072f1300
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000020
RBP: ffffc9000112f490 R08: ffffc9000112f417 R09: 0000000000000000
R10: ffffc9000112f3f0 R11: fffff52000225e83 R12: ffffc9000112f3e0
R13: 1ffff11023e8a2f0 R14: 0000000000000000 R15: 0000000000000000
FS:  000055557e6d4380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff99b363589 CR3: 0000000106ea2000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 unmap_single_vma mm/memory.c:1857 [inline]
 zap_page_range_single+0x462/0x470 mm/memory.c:1958
 remap_pfn_range_notrack+0x9be/0xb00 mm/memory.c:2732
 remap_pfn_range+0xf1/0x170 mm/memory.c:2757
 sel_mmap_handle_status+0x2d8/0x3c0 security/selinux/selinuxfs.c:260
 call_mmap include/linux/fs.h:2188 [inline]
 mmap_file mm/internal.h:124 [inline]
 __mmap_region mm/mmap.c:1471 [inline]
 mmap_region+0x1371/0x1bd0 mm/mmap.c:1634
 do_mmap+0xb6d/0x13c0 mm/mmap.c:508
 vm_mmap_pgoff+0x38f/0x4e0 mm/util.c:594
 ksys_mmap_pgoff+0x166/0x1e0 mm/mmap.c:557
 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:86 [inline]
 __se_sys_mmap arch/x86/kernel/sys_x86_64.c:79 [inline]
 __x64_sys_mmap+0x121/0x140 arch/x86/kernel/sys_x86_64.c:79
 x64_sys_call+0x13bf/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:10
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7ff99b30dd79
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 31 1b 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdb0a26538 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007ff99b30dd79
RDX: 0000000000000001 RSI: 0000000000001000 RDI: 0000200000ffd000
RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000000
R10: 0000000000000011 R11: 0000000000000246 R12: 0000000000005271
R13: 00007ffdb0a26554 R14: 00007ffdb0a26580 R15: 00007ffdb0a26570
 </TASK>
---[ end trace 0000000000000000 ]---

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/06/19 04:16 android16-6.12 30b14cdad458 ed3e87f7 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in untrack_pfn
2025/06/19 04:16 android16-6.12 30b14cdad458 ed3e87f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in untrack_pfn
2025/06/19 03:52 android16-6.12 30b14cdad458 ed3e87f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in untrack_pfn
* Struck through repros no longer work on HEAD.