syzbot


general protection fault in futex_wake

Status: auto-closed as invalid on 2020/12/19 07:00
Reported-by: syzbot+5a78edccf21cb34b5239@syzkaller.appspotmail.com
First crash: 832d, last: 832d
similar bugs (4):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream general protection fault in futex_wake 1 831d 827d 0/24 auto-closed as invalid on 2020/10/20 15:46
upstream general protection fault in futex_wake (2) 2 495d 499d 0/24 auto-closed as invalid on 2021/10/21 19:26
linux-4.14 general protection fault in futex_wake 1 1082d 1082d 0/1 auto-closed as invalid on 2020/04/13 04:56
linux-4.19 general protection fault in futex_wake (2) 1 613d 613d 0/1 auto-closed as invalid on 2021/07/25 11:26

Sample crash report:
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 6848 Comm: syz-executor.0 Not tainted 4.19.140-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:futex_wake+0x22f/0x480 kernel/futex.c:1618
Code: 4c 39 24 24 48 8d 58 e8 0f 84 b7 01 00 00 49 bc 00 00 00 00 00 fc ff df eb 33 e8 4c a4 0a 00 4c 8d 6b 18 4c 89 e8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 c5 01 00 00 48 8b 43 18 48 89 dd 48 83 e8 18
RSP: 0018:ffff88821372f7b0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffffffffffffe8 RCX: ffffffff815f0c2f
RDX: 0000000000000000 RSI: ffffffff815f0bc4 RDI: 0000000000000006
RBP: ffff88800013fb40 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000006 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 00007f4dd7b9f000
FS:  0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000007454d8 CR3: 000000004f1f3000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 do_futex+0x351/0x1c40 kernel/futex.c:3714
 mm_release+0x322/0x470 kernel/fork.c:1256
 exit_mm kernel/exit.c:501 [inline]
 do_exit+0x6c8/0x2b70 kernel/exit.c:874
 do_group_exit+0x125/0x310 kernel/exit.c:990
 get_signal+0x3f2/0x1f70 kernel/signal.c:2588
 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:821
 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
 do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45d4d9
Code: 5d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f4dd7b9ecf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000118cf48 RCX: 000000000045d4d9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000118cf48
RBP: 000000000118cf40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007fff259a55ef R14: 00007f4dd7b9f9c0 R15: 000000000118cf4c
Modules linked in:
---[ end trace 240b1da468d0d85e ]---
RIP: 0010:futex_wake+0x22f/0x480 kernel/futex.c:1618
Code: 4c 39 24 24 48 8d 58 e8 0f 84 b7 01 00 00 49 bc 00 00 00 00 00 fc ff df eb 33 e8 4c a4 0a 00 4c 8d 6b 18 4c 89 e8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 c5 01 00 00 48 8b 43 18 48 89 dd 48 83 e8 18
RSP: 0018:ffff88821372f7b0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffffffffffffe8 RCX: ffffffff815f0c2f
RDX: 0000000000000000 RSI: ffffffff815f0bc4 RDI: 0000000000000006
RBP: ffff88800013fb40 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000006 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 00007f4dd7b9f000
FS:  0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000007454d8 CR3: 000000004f1f3000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-linux-4-19 2020/08/21 06:59 linux-4.19.y a834132bd465 1d75fe45 .config log report
* Struck through repros no longer work on HEAD.