syzbot


general protection fault in futex_wake (2)

Status: auto-closed as invalid on 2021/10/21 19:26
Reported-by: syzbot+8485ec8c243eb5b89373@syzkaller.appspotmail.com
First crash: 398d, last: 390d
similar bugs (5):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream general protection fault in futex_wake 1 726d 722d 0/23 auto-closed as invalid on 2020/10/20 15:46
linux-4.14 general protection fault in futex_wake 1 976d 976d 0/1 auto-closed as invalid on 2020/04/13 04:56
linux-4.19 general protection fault in futex_wake 1 726d 726d 0/1 auto-closed as invalid on 2020/12/19 07:00
linux-4.19 general protection fault in futex_wake (2) 1 508d 508d 0/1 auto-closed as invalid on 2021/07/25 11:26
upstream KASAN: null-ptr-deref Read in futex_wake 1 7d14h 3d14h 0/23 moderation: reported on 2022/08/14 08:45

Sample crash report:
general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 454 Comm: syz-executor.4 Not tainted 5.14.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:futex_wake+0x22c/0x490 kernel/futex.c:1615
Code: 39 64 24 08 48 8d 58 e8 0f 84 06 02 00 00 49 bc 00 00 00 00 00 fc ff df eb 34 e8 1f e2 0b 00 4c 8d 73 18 4c 89 f0 48 c1 e8 03 <42> 80 3c 20 00 0f 85 e4 01 00 00 48 8b 43 18 48 89 dd 48 83 e8 18
RSP: 0018:ffffc9001af6fb58 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffffffffffffe8 RCX: 0000000000000000
RDX: ffff8880352cb880 RSI: ffffffff8169a6b1 RDI: 0000000000000003
RBP: ffffc9000ac1fb70 R08: 0000000000000000 R09: 0000000000000003
R10: ffffffff8169a721 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 000000000056b000
FS:  0000000002b7f400(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000002b80808 CR3: 000000015603b000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_futex+0x2a0/0x1770 kernel/futex.c:3735
 __do_sys_futex+0xdc/0x3b0 kernel/futex.c:3807
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665e9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:0000000000a9fb98 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00000000004665e9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 000000000056bf88
RBP: 000000000056bf80 R08: 00007f0fd65f8700 R09: 0000000000000000
R10: 00007f0fd65f8700 R11: 0000000000000246 R12: 0000000000570a68
R13: 0000000000a9fca0 R14: 000000000056bf80 R15: 00000000000ccea2
Modules linked in:
---[ end trace 169c33dbe1bb7d74 ]---
RIP: 0010:futex_wake+0x22c/0x490 kernel/futex.c:1615
Code: 39 64 24 08 48 8d 58 e8 0f 84 06 02 00 00 49 bc 00 00 00 00 00 fc ff df eb 34 e8 1f e2 0b 00 4c 8d 73 18 4c 89 f0 48 c1 e8 03 <42> 80 3c 20 00 0f 85 e4 01 00 00 48 8b 43 18 48 89 dd 48 83 e8 18
RSP: 0018:ffffc9001af6fb58 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffffffffffffe8 RCX: 0000000000000000
RDX: ffff8880352cb880 RSI: ffffffff8169a6b1 RDI: 0000000000000003
RBP: ffffc9000ac1fb70 R08: 0000000000000000 R09: 0000000000000003
R10: ffffffff8169a721 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 000000000056b000
FS:  0000000002b7f400(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000002b80808 CR3: 000000015603b000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (2):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce 2021/07/23 19:25 upstream 9bead1b58c4c bc5f1d88 .config log report info general protection fault in futex_wake
ci-upstream-kasan-gce 2021/07/15 19:00 upstream 8096acd7442e b9a2f64e .config log report info general protection fault in futex_wake