On Fri, Jan 4, 2019 at 11:58 PM syzbot <syzbot+c950a368703778078dc8@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > syzbot has found a reproducer for the following crash on: > > HEAD commit: 96d4f267e40f Remove 'type' argument from access_ok() funct.. > git tree: net > console output: https://syzkaller.appspot.com/x/log.txt?x=160c9a80c00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=7308e68273924137 > dashboard link: https://syzkaller.appspot.com/bug?extid=c950a368703778078dc8 > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=125376bb400000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=121d85ab400000 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+c950a368703778078dc8@xxxxxxxxxxxxxxxxxxxxxxxxx Based on the repro looks like another incarnation of: #syz dup: kernel panic: stack is corrupted in udp4_lib_lookup2 https://syzkaller.appspot.com/bug?id=4821de869e3d78a255a034bf212a4e009f6125a7 > ------------[ cut here ]------------ > kasan: CONFIG_KASAN_INLINE enabled > mem_cgroup_update_lru_size(00000000d6ca43c5, 1, 1): lru_size -2032898272 > kasan: GPF could be caused by NULL-ptr deref or user memory access > WARNING: CPU: 0 PID: 11430 at mm/memcontrol.c:1160 > mem_cgroup_update_lru_size+0xb2/0xe0 mm/memcontrol.c:1160 > general protection fault: 0000 [#1] PREEMPT SMP KASAN > Kernel panic - not syncing: panic_on_warn set ... > CPU: 1 PID: 4 Comm: Not tainted 4.20.0+ #8 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > RIP: 0010:__read_once_size include/linux/compiler.h:191 [inline] > RIP: 0010:get_running_cputimer include/linux/sched/cputime.h:85 [inline] > RIP: 0010:account_group_system_time include/linux/sched/cputime.h:149 > [inline] > RIP: 0010:account_system_index_time+0xe8/0x5f0 kernel/sched/cputime.c:168 > Code: 04 00 00 49 8b 84 24 00 07 00 00 48 ba 00 00 00 00 00 fc ff df 48 8d > b8 40 01 00 00 48 8d 88 28 01 00 00 48 89 fe 48 c1 ee 03 <0f> b6 14 16 48 > 89 fe 83 e6 07 40 38 f2 7f 08 84 d2 0f 85 93 03 00 > RSP: 0018:ffff8880ae707a80 EFLAGS: 00010006 > RAX: 0000000041b58ab3 RBX: 1ffff11015ce0f54 RCX: 0000000041b58bdb > RDX: dffffc0000000000 RSI: 000000000836b17e RDI: 0000000041b58bf3 > RBP: ffff8880ae707b48 R08: ffff8880ae71f5f0 R09: ffffffff8a9a805d > R10: ffffffff8a9a8050 R11: 0000000000000001 R12: ffff8880a94bc440 > R13: 0000000000981859 R14: 0000000000000003 R15: ffff8880ae707b20 > FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00000000006dae70 CR3: 0000000086205000 CR4: 00000000001406e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > <IRQ> > irqtime_account_process_tick.isra.0+0x3a2/0x490 kernel/sched/cputime.c:380 > account_process_tick+0x27f/0x350 kernel/sched/cputime.c:483 > update_process_times+0x25/0x80 kernel/time/timer.c:1633 > tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:161 > tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1271 > __run_hrtimer kernel/time/hrtimer.c:1389 [inline] > __hrtimer_run_queues+0x3a7/0x1050 kernel/time/hrtimer.c:1451 > hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 > local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline] > smp_apic_timer_interrupt+0x18d/0x760 arch/x86/kernel/apic/apic.c:1060 > apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 > </IRQ> > Modules linked in: > ---[ end trace 42848964955b563b ]--- > RIP: 0010:__read_once_size include/linux/compiler.h:191 [inline] > RIP: 0010:get_running_cputimer include/linux/sched/cputime.h:85 [inline] > RIP: 0010:account_group_system_time include/linux/sched/cputime.h:149 > [inline] > RIP: 0010:account_system_index_time+0xe8/0x5f0 kernel/sched/cputime.c:168 > Code: 04 00 00 49 8b 84 24 00 07 00 00 48 ba 00 00 00 00 00 fc ff df 48 8d > b8 40 01 00 00 48 8d 88 28 01 00 00 48 89 fe 48 c1 ee 03 <0f> b6 14 16 48 > 89 fe 83 e6 07 40 38 f2 7f 08 84 d2 0f 85 93 03 00 > RSP: 0018:ffff8880ae707a80 EFLAGS: 00010006 > RAX: 0000000041b58ab3 RBX: 1ffff11015ce0f54 RCX: 0000000041b58bdb > RDX: dffffc0000000000 RSI: 000000000836b17e RDI: 0000000041b58bf3 > RBP: ffff8880ae707b48 R08: ffff8880ae71f5f0 R09: ffffffff8a9a805d > R10: ffffffff8a9a8050 R11: 0000000000000001 R12: ffff8880a94bc440 > R13: 0000000000981859 R14: 0000000000000003 R15: ffff8880ae707b20 > FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00000000006dae70 CR3: 0000000086205000 CR4: 00000000001406e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Shutting down cpus with NMI > Kernel Offset: disabled > Rebooting in 86400 seconds.. > > -- > You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@xxxxxxxxxxxxxxxx. > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/000000000000b65931057ea9cf82%40google.com. > For more options, visit https://groups.google.com/d/optout.
