syzbot


WARNING in unmap_single_vma

Status: upstream: reported syz repro on 2019/08/23 13:21
Reported-by: syzbot+701d4b51fdc3355fe2b9@syzkaller.appspotmail.com
First crash: 1767d, last: 1471d
Fix bisection the fix commit could be any of (bisect log):
  45f092f9e9cb Linux 4.14.139
  56dfe6252c68 Linux 4.14.188
  
Last patch testing requests (2)
Created Duration User Patch Repo Result
2023/01/26 07:32 10m retest repro linux-4.14.y report log
2022/09/08 04:27 8m retest repro linux-4.14.y report log
Fix bisection attempts (8)
Created Duration User Patch Repo Result
2020/07/14 08:35 37m bisect fix linux-4.14.y job log (2)
2020/06/14 07:59 36m bisect fix linux-4.14.y job log (0) log
2020/05/15 07:19 39m bisect fix linux-4.14.y job log (0) log
2020/04/15 06:17 37m bisect fix linux-4.14.y job log (0) log
2020/03/16 05:39 37m bisect fix linux-4.14.y job log (0) log
2020/02/15 01:10 37m bisect fix linux-4.14.y job log (0) log
2020/01/15 23:18 38m bisect fix linux-4.14.y job log (0) log
2019/12/16 17:03 37m bisect fix linux-4.14.y job log (0) log

Sample crash report:
 should_failslab+0xdb/0x130 mm/failslab.c:32
 slab_pre_alloc_hook mm/slab.h:421 [inline]
 slab_alloc mm/slab.c:3376 [inline]
 kmem_cache_alloc+0x2d7/0x780 mm/slab.c:3550
 ptlock_alloc+0x20/0x70 mm/memory.c:4741
------------[ cut here ]------------
 ptlock_init include/linux/mm.h:1757 [inline]
 pgtable_page_ctor include/linux/mm.h:1791 [inline]
 pte_alloc_one+0x60/0x100 arch/x86/mm/pgtable.c:33
WARNING: CPU: 0 PID: 6742 at arch/x86/mm/pat.c:1020 untrack_pfn+0x1dc/0x220 arch/x86/mm/pat.c:1020
 __pte_alloc+0x2a/0x2d0 mm/memory.c:656
Kernel panic - not syncing: panic_on_warn set ...

 copy_pte_range mm/memory.c:1081 [inline]
 copy_pmd_range mm/memory.c:1157 [inline]
 copy_pud_range mm/memory.c:1191 [inline]
 copy_p4d_range mm/memory.c:1213 [inline]
 copy_page_range+0x11ba/0x1bd0 mm/memory.c:1275
 dup_mmap kernel/fork.c:714 [inline]
 dup_mm kernel/fork.c:1208 [inline]
 copy_mm kernel/fork.c:1263 [inline]
 copy_process.part.0+0x4764/0x6a00 kernel/fork.c:1780
 copy_process kernel/fork.c:1595 [inline]
 _do_fork+0x19e/0xce0 kernel/fork.c:2085
 SYSC_clone kernel/fork.c:2195 [inline]
 SyS_clone+0x37/0x50 kernel/fork.c:2189
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x459829
RSP: 002b:00007f768a0f8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f768a0f8c90 RCX: 0000000000459829
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f768a0f96d4
R13: 00000000004bfce6 R14: 00000000004d1a58 R15: 0000000000000005
CPU: 0 PID: 6742 Comm: syz-executor.1 Not tainted 4.14.139 #35
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x138/0x19c lib/dump_stack.c:53
 panic+0x1f2/0x426 kernel/panic.c:182
 __warn.cold+0x2f/0x36 kernel/panic.c:546
 report_bug+0x216/0x254 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x1bb/0x310 arch/x86/kernel/traps.c:295
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:963
RIP: 0010:untrack_pfn+0x1dc/0x220 arch/x86/mm/pat.c:1020
RSP: 0018:ffff8880925ef948 EFLAGS: 00010297
RAX: ffff88808a88e3c0 RBX: ffff8880956bada8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffff8880925ef9d8 R08: ffff88808a88e3c0 R09: 0000000000000000
R10: 0000000000000000 R11: ffff88808a88e3c0 R12: 1ffff110124bdf2a
R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880925ef9b0
 unmap_single_vma+0x182/0x2c0 mm/memory.c:1539
 unmap_vmas+0xac/0x170 mm/memory.c:1590
 exit_mmap+0x285/0x4e0 mm/mmap.c:3062
 __mmput kernel/fork.c:935 [inline]
 mmput+0x114/0x440 kernel/fork.c:956
 dup_mm kernel/fork.c:1224 [inline]
 copy_mm kernel/fork.c:1263 [inline]
 copy_process.part.0+0x4743/0x6a00 kernel/fork.c:1780
 copy_process kernel/fork.c:1595 [inline]
 _do_fork+0x19e/0xce0 kernel/fork.c:2085
 SYSC_clone kernel/fork.c:2195 [inline]
 SyS_clone+0x37/0x50 kernel/fork.c:2189
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x459829
RSP: 002b:00007f37d3880c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f37d3880c90 RCX: 0000000000459829
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f37d38816d4
R13: 00000000004bfce6 R14: 00000000004d1a58 R15: 0000000000000005
CPU: 1 PID: 6749 Comm: syz-executor.5 Not tainted 4.14.139 #35
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x138/0x19c lib/dump_stack.c:53
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail.cold+0x10f/0x159 lib/fault-inject.c:149
 should_failslab+0xdb/0x130 mm/failslab.c:32
 slab_pre_alloc_hook mm/slab.h:421 [inline]
 slab_alloc mm/slab.c:3376 [inline]
 kmem_cache_alloc+0x2d7/0x780 mm/slab.c:3550
 dup_mmap kernel/fork.c:652 [inline]
 dup_mm kernel/fork.c:1208 [inline]
 copy_mm kernel/fork.c:1263 [inline]
 copy_process.part.0+0x444f/0x6a00 kernel/fork.c:1780
 copy_process kernel/fork.c:1595 [inline]
 _do_fork+0x19e/0xce0 kernel/fork.c:2085
 SYSC_clone kernel/fork.c:2195 [inline]
 SyS_clone+0x37/0x50 kernel/fork.c:2189
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x459829
RSP: 002b:00007f5de3de9c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f5de3de9c90 RCX: 0000000000459829
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5de3dea6d4
R13: 00000000004bfce6 R14: 00000000004d1a58 R15: 0000000000000005
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/08/23 12:20 linux-4.14.y 45f092f9e9cb ca6f3cfa .config console log report syz ci2-linux-4-14
2019/08/25 18:44 linux-4.14.y b5260801526c d21c5d9d .config console log report ci2-linux-4-14
* Struck through repros no longer work on HEAD.