syzbot


general protection fault in rcu_process_callbacks

Status: auto-closed as invalid on 2020/07/09 05:25
Reported-by: syzbot+28db516b065947d066b3@syzkaller.appspotmail.com
First crash: 835d, last: 835d
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 general protection fault in rcu_process_callbacks 1 386d 386d 0/1 auto-closed as invalid on 2021/10/01 13:59

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
Modules linked in:
CPU: 1 PID: 20010 Comm: syz-executor.5 Not tainted 4.14.172-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880954ae400 task.stack: ffff88821b7a0000
RIP: 0010:__rcu_reclaim kernel/rcu/rcu.h:195 [inline]
RIP: 0010:rcu_do_batch kernel/rcu/tree.c:2699 [inline]
RIP: 0010:invoke_rcu_callbacks kernel/rcu/tree.c:2962 [inline]
RIP: 0010:__rcu_process_callbacks kernel/rcu/tree.c:2929 [inline]
RIP: 0010:rcu_process_callbacks+0x78f/0x1190 kernel/rcu/tree.c:2946
RSP: 0018:ffff8880aeb07e38 EFLAGS: 00010246
RAX: ffffffff814be896 RBX: ffff8880001a8598 RCX: 000000008de37c64
RDX: 1ffff110000350b4 RSI: ffff8880954aed48 RDI: ffff8880001a8598
RBP: ffffffff87d16710 R08: 0000000000000000 R09: 00000000000220d1
R10: ffff8880954aed48 R11: ffff8880954ae400 R12: ffff8880001a85a0
R13: ffff8880aeb07eb0 R14: 7777777770077700 R15: dffffc0000000000
FS:  00007fadb5e23700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f342737cdb8 CR3: 00000000a9770000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __do_softirq+0x254/0x9bf kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x15b/0x1a0 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0010:__sanitizer_cov_trace_pc+0x3d/0x50 kernel/kcov.c:87
RSP: 0018:ffff88821b7a74d0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: 0000000000040000 RBX: ffffffff881defc0 RCX: ffffc90008a42000
RDX: 000000000003ffff RSI: ffffffff813ccb3c RDI: ffffffff881defc0
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: ffff8880954aed48 R11: ffff8880954ae400 R12: 0000000000000003
R13: ffff88821b7a7608 R14: 00000000ffffffff R15: ffff88804bb89990
 rcu_read_lock include/linux/rcupdate.h:627 [inline]
 __atomic_notifier_call_chain+0x1c/0x140 kernel/notifier.c:182
 notify_write drivers/tty/vt/vt.c:268 [inline]
 do_con_write.part.0+0xc9c/0x1a20 drivers/tty/vt/vt.c:2419
 do_con_write drivers/tty/vt/vt.c:2205 [inline]
 con_write+0x33/0xc0 drivers/tty/vt/vt.c:2787
 process_output_block drivers/tty/n_tty.c:595 [inline]
 n_tty_write+0x375/0xe30 drivers/tty/n_tty.c:2333
 do_tty_write drivers/tty/tty_io.c:959 [inline]
 tty_write+0x3f0/0x700 drivers/tty/tty_io.c:1043
 __vfs_write+0xe4/0x630 fs/read_write.c:480
 __kernel_write+0xf5/0x330 fs/read_write.c:501
 write_pipe_buf+0x143/0x1b0 fs/splice.c:797
 splice_from_pipe_feed fs/splice.c:502 [inline]
 __splice_from_pipe+0x332/0x740 fs/splice.c:626
 splice_from_pipe+0xc6/0x120 fs/splice.c:661
 default_file_splice_write+0x37/0x80 fs/splice.c:809
 do_splice_from fs/splice.c:851 [inline]
 direct_splice_actor+0x115/0x160 fs/splice.c:1018
 splice_direct_to_actor+0x27e/0x730 fs/splice.c:973
 do_splice_direct+0x164/0x210 fs/splice.c:1061
 do_sendfile+0x469/0xaf0 fs/read_write.c:1441
 SYSC_sendfile64 fs/read_write.c:1502 [inline]
 SyS_sendfile64+0xff/0x110 fs/read_write.c:1488
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45c4a9
RSP: 002b:00007fadb5e22c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fadb5e236d4 RCX: 000000000045c4a9
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000005
RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0800000080004103 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000008d1 R14: 00000000004cb3b0 R15: 000000000076bf2c
Code: 8b 6c 24 28 48 89 c3 4c 89 74 24 38 4c 89 64 24 48 e9 b1 00 00 00 4c 89 e2 48 c1 ea 03 42 80 3c 3a 00 0f 85 5c 07 00 00 48 89 df <ff> 53 08 48 c7 c2 bc e7 4b 81 be 01 00 00 00 48 c7 c7 20 43 d8 
RIP: __rcu_reclaim kernel/rcu/rcu.h:195 [inline] RSP: ffff8880aeb07e38
RIP: rcu_do_batch kernel/rcu/tree.c:2699 [inline] RSP: ffff8880aeb07e38
RIP: invoke_rcu_callbacks kernel/rcu/tree.c:2962 [inline] RSP: ffff8880aeb07e38
RIP: __rcu_process_callbacks kernel/rcu/tree.c:2929 [inline] RSP: ffff8880aeb07e38
RIP: rcu_process_callbacks+0x78f/0x1190 kernel/rcu/tree.c:2946 RSP: ffff8880aeb07e38
---[ end trace dccd1b4177169e3f ]---

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-linux-4-14 2020/03/11 05:25 linux-4.14.y 78d697fc93f9 35f53e45 .config log report