syzbot


general protection fault in __bfs

Status: closed as dup on 2018/12/12 11:02
Reported-by: syzbot+9af93090b1662f253d62@syzkaller.appspotmail.com
First crash: 1508d, last: 1479d
Duplicate of (1):
Title Repro Cause bisect Fix bisect Count Last Reported
KASAN: use-after-free Read in kfree_skb (2) C 66 1500d 1510d
similar bugs (3):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 general protection fault in __bfs 4 687d 831d 0/1 auto-closed as invalid on 2021/07/10 18:06
linux-4.14 general protection fault in __bfs (2) C 2 1d11h 104d 0/1 upstream: reported C repro on 2022/10/16 12:07
upstream general protection fault in __bfs (2) C done done 16 987d 1467d 0/24 auto-obsoleted due to no activity on 2022/09/16 03:13

Sample crash report:
Enabling of bearer <udp:syz1> rejected, already enabled
Enabling of bearer <udp:syz1> rejected, already enabled
Enabling of bearer <udp:syz1> rejected, already enabled
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: 9250 Comm: syz-executor424 Not tainted 4.20.0-rc6+ #274
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:lock_accessed kernel/locking/lockdep.c:964 [inline]
RIP: 0010:__bfs+0x3d9/0x780 kernel/locking/lockdep.c:1032
Code: 7c 24 c0 41 c6 45 00 f8 74 7c 49 8d 7f 10 4c 89 fe 4c 8b 0d 89 8a aa 09 48 89 f8 48 81 ee 20 55 eb 8a 48 c1 e8 03 48 c1 fe 06 <42> 80 3c 30 00 0f 85 d4 01 00 00 4d 8b 47 10 49 8d 40 2c 48 89 c7
RSP: 0018:ffff8881dae06c88 EFLAGS: 00010003
RAX: 0000000000000002 RBX: ffffffff8ae100d0 RCX: 1ffff1103b5c0db1
RDX: 1ffffffff15c201a RSI: 0000000001d452ab RDI: 0000000000000010
RBP: ffff8881dae06df0 R08: 0000000000000001 R09: 0000000000001b46
R10: ffffed103b5c5b5f R11: ffff8881c3dba240 R12: ffff8881dae06dc8
R13: ffffed103b5c0db1 R14: dffffc0000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881dae00000(0063) knlGS:0000000009355840
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000008100000 CR3: 00000001c34e9000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __bfs_forwards kernel/locking/lockdep.c:1060 [inline]
 find_usage_forwards kernel/locking/lockdep.c:1360 [inline]
 check_usage_forwards+0x163/0x3d0 kernel/locking/lockdep.c:2572
 mark_lock_irq kernel/locking/lockdep.c:2687 [inline]
 mark_lock+0x9b5/0x1cd0 kernel/locking/lockdep.c:3059
 mark_irqflags kernel/locking/lockdep.c:2937 [inline]
 __lock_acquire+0x155f/0x4c20 kernel/locking/lockdep.c:3298
 lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3844
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:144
 spin_lock include/linux/spinlock.h:329 [inline]
 __queue_work+0xc1b/0x1440 kernel/workqueue.c:1414
 delayed_work_timer_fn+0x5d/0x90 kernel/workqueue.c:1500
 call_timer_fn+0x272/0x920 kernel/time/timer.c:1326
 expire_timers kernel/time/timer.c:1359 [inline]
 __run_timers+0x723/0xc70 kernel/time/timer.c:1682
 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1695
 __do_softirq+0x308/0xb7e kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x17f/0x1c0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:761 [inline]
RIP: 0010:console_unlock+0xf41/0x1190 kernel/printk/printk.c:2422
Code: 48 89 f8 48 c1 e8 03 42 80 3c 30 00 0f 85 54 02 00 00 48 83 3d 9f 84 ec 07 00 74 72 e8 18 08 1a 00 48 8b bd b0 fe ff ff 57 9d <0f> 1f 44 00 00 e9 f3 f2 ff ff e8 00 08 1a 00 0f 0b e8 f9 07 1a 00
RSP: 0018:ffff8881d9246d08 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: ffff8881c3dba240 RBX: 0000000000000200 RCX: 1ffff110387b756b
RDX: 0000000000000000 RSI: ffffffff81657c58 RDI: 0000000000000293
RBP: ffff8881d9246e78 R08: ffff8881c3dbab58 R09: 0000000000000006
R10: 0000000000000000 R11: ffff8881c3dba240 R12: 0000000000000000
R13: ffffffff849c4410 R14: dffffc0000000000 R15: ffffffff89b639d0
 vprintk_emit+0x391/0x990 kernel/printk/printk.c:1922
 vprintk_default+0x28/0x30 kernel/printk/printk.c:1964
 vprintk_func+0x7e/0x181 kernel/printk/printk_safe.c:398
 printk+0xa7/0xcf kernel/printk/printk.c:1997
 tipc_enable_bearer+0x4ad/0xf10 net/tipc/bearer.c:338
 __tipc_nl_bearer_enable+0x37c/0x4a0 net/tipc/bearer.c:897
 tipc_nl_bearer_enable+0x22/0x30 net/tipc/bearer.c:905
 genl_family_rcv_msg+0x8a7/0x11a0 net/netlink/genetlink.c:601
 genl_rcv_msg+0xc6/0x168 net/netlink/genetlink.c:626
 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2477
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:637
 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
 netlink_unicast+0x5a5/0x760 net/netlink/af_netlink.c:1336
 netlink_sendmsg+0xa18/0xfc0 net/netlink/af_netlink.c:1917
 sock_sendmsg_nosec net/socket.c:621 [inline]
 sock_sendmsg+0xd5/0x120 net/socket.c:631
 ___sys_sendmsg+0x7fd/0x930 net/socket.c:2116
 __sys_sendmsg+0x11d/0x280 net/socket.c:2154
 __compat_sys_sendmsg net/compat.c:754 [inline]
 __do_compat_sys_sendmsg net/compat.c:761 [inline]
 __se_compat_sys_sendmsg net/compat.c:758 [inline]
 __ia32_compat_sys_sendmsg+0x7a/0xb0 net/compat.c:758
 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
 do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7f0fa29
Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:000000000820fd6c EFLAGS: 00000213 ORIG_RAX: 0000000000000172
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020001e40
RDX: 0000000000000080 RSI: 0000000000000000 RDI: 0000000000000122
RBP: 0000000000010b54 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace fc7927d741510429 ]---
RIP: 0010:lock_accessed kernel/locking/lockdep.c:964 [inline]
RIP: 0010:__bfs+0x3d9/0x780 kernel/locking/lockdep.c:1032
Code: 7c 24 c0 41 c6 45 00 f8 74 7c 49 8d 7f 10 4c 89 fe 4c 8b 0d 89 8a aa 09 48 89 f8 48 81 ee 20 55 eb 8a 48 c1 e8 03 48 c1 fe 06 <42> 80 3c 30 00 0f 85 d4 01 00 00 4d 8b 47 10 49 8d 40 2c 48 89 c7
RSP: 0018:ffff8881dae06c88 EFLAGS: 00010003
RAX: 0000000000000002 RBX: ffffffff8ae100d0 RCX: 1ffff1103b5c0db1
RDX: 1ffffffff15c201a RSI: 0000000001d452ab RDI: 0000000000000010
RBP: ffff8881dae06df0 R08: 0000000000000001 R09: 0000000000001b46
R10: ffffed103b5c5b5f R11: ffff8881c3dba240 R12: ffff8881dae06dc8
R13: ffffed103b5c0db1 R14: dffffc0000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881dae00000(0063) knlGS:0000000009355840
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000008100000 CR3: 00000001c34e9000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (4):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Title
ci-upstream-kasan-gce-386 2018/12/12 01:01 upstream f5d582777bcb 7795ae03 .config console log report syz C
ci-upstream-kasan-gce-selinux-root 2019/01/09 00:58 upstream 7b5585136713 010ed08b .config console log report
ci-upstream-kasan-gce-smack-root 2019/01/06 20:24 upstream b5aef86e089a 94f8adb5 .config console log report
ci-upstream-net-kasan-gce 2019/01/10 05:38 net-next b71acb0e3721 45c0c1b1 .config console log report
* Struck through repros no longer work on HEAD.