syzbot


general protection fault in j1939_jsk_del (2)

Status: fixed on 2020/02/14 01:19
Subsystems: can
[Documentation on labels]
Reported-by: syzbot+99e9e1b200a1e363237d@syzkaller.appspotmail.com
Fix commit: 00d4e14d2e4c can: j1939: j1939_sk_bind(): take priv after lock is held
First crash: 1581d, last: 1563d
Discussions (4)
Title Replies (including bot) Last reply
[PATCH 5.4 000/434] 5.4.7-stable review 465 (465) 2020/01/03 16:53
[PATCH 03/13] can: j1939: j1939_sk_bind(): take priv after lock is held 1 (1) 2019/12/09 16:32
[PATCH v1] can: j1939: j1939_sk_bind(): take priv after lock is held 2 (2) 2019/12/07 13:05
general protection fault in j1939_jsk_del (2) 0 (2) 2019/11/30 08:46
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream general protection fault in j1939_jsk_del syz done 132 1581d 1605d 14/26 fixed on 2019/11/29 15:48

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: 9844 Comm: syz-executor.0 Not tainted 5.4.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__lock_acquire+0x1254/0x4a00 kernel/locking/lockdep.c:3828
Code: 00 0f 85 96 24 00 00 48 81 c4 f0 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 0b 28 00 00 49 81 3e 20 19 78 8a 0f 84 5f ee ff
RSP: 0018:ffff888099c3fb48 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000218 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffff888099c3fc60 R08: 0000000000000001 R09: 0000000000000001
R10: fffffbfff146e1d0 R11: ffff888098720400 R12: 00000000000010c0
R13: 0000000000000000 R14: 00000000000010c0 R15: 0000000000000000
FS:  00007f0559e98700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe4d89e0000 CR3: 0000000099606000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4485
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
 _raw_spin_lock_bh+0x33/0x50 kernel/locking/spinlock.c:175
 spin_lock_bh include/linux/spinlock.h:343 [inline]
 j1939_jsk_del+0x32/0x210 net/can/j1939/socket.c:89
 j1939_sk_bind+0x2ea/0x8f0 net/can/j1939/socket.c:448
 __sys_bind+0x239/0x290 net/socket.c:1648
 __do_sys_bind net/socket.c:1659 [inline]
 __se_sys_bind net/socket.c:1657 [inline]
 __x64_sys_bind+0x73/0xb0 net/socket.c:1657
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45a679
Code: ad b6 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f0559e97c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000031
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a679
RDX: 0000000000000018 RSI: 0000000020000240 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0559e986d4
R13: 00000000004c09e9 R14: 00000000004d37d0 R15: 00000000ffffffff
Modules linked in:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 9844 at kernel/locking/mutex.c:1419 mutex_trylock+0x279/0x2f0 kernel/locking/mutex.c:1427

Crashes (21):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/12/01 11:57 upstream 32ef9553635a a76bf83f .config console log report syz ci-upstream-kasan-gce-selinux-root
2019/12/01 07:43 upstream 32ef9553635a a76bf83f .config console log report syz ci-upstream-kasan-gce-selinux-root
2019/11/30 20:17 upstream 81b6b96475ac 3a75be00 .config console log report syz ci-upstream-kasan-gce-root
2019/11/30 17:47 upstream 81b6b96475ac 3a75be00 .config console log report syz ci-upstream-kasan-gce-root
2019/11/30 12:42 upstream 81b6b96475ac 3a75be00 .config console log report syz ci-upstream-kasan-gce
2019/11/30 09:45 upstream 81b6b96475ac 3a75be00 .config console log report syz ci-upstream-kasan-gce
2019/12/01 04:58 upstream 32ef9553635a a76bf83f .config console log report syz ci-upstream-kasan-gce-386
2019/11/30 09:27 net-old 2745aea6750f 3a75be00 .config console log report syz ci-upstream-net-this-kasan-gce
2019/11/30 08:59 net-old 2745aea6750f 3a75be00 .config console log report syz ci-upstream-net-this-kasan-gce
2019/11/30 09:20 net-next-old 81b6b96475ac 3a75be00 .config console log report syz ci-upstream-net-kasan-gce
2019/11/30 08:45 net-next-old 81b6b96475ac 3a75be00 .config console log report syz ci-upstream-net-kasan-gce
2019/12/16 20:59 upstream 7de7de7ca0ae d13d7958 .config console log report ci-qemu-upstream
2019/12/08 05:52 upstream ad910e36da4c 1508f453 .config console log report ci-upstream-kasan-gce
2019/12/02 17:47 upstream 596cf45cbf6e ab342da3 .config console log report ci-qemu-upstream
2019/12/02 00:37 upstream ceb307474506 f879db37 .config console log report ci-qemu-upstream
2019/12/01 05:09 upstream b94ae8ad9fe7 a76bf83f .config console log report ci-qemu-upstream
2019/12/16 21:05 upstream 7de7de7ca0ae d13d7958 .config console log report ci-qemu-upstream-386
2019/11/29 16:01 upstream 81b6b96475ac d29b9e84 .config console log report ci-upstream-kasan-gce-386
2019/11/30 08:15 net-old 2745aea6750f 3a75be00 .config console log report ci-upstream-net-this-kasan-gce
2019/12/02 11:31 net-next-old 81b6b96475ac f879db37 .config console log report ci-upstream-net-kasan-gce
2019/12/08 19:49 linux-next c34be716fb37 1508f453 .config console log report ci-upstream-linux-next-kasan-gce-root
* Struck through repros no longer work on HEAD.