On Sun, May 20, 2018 at 4:03 AM, syzbot <syzbot+4006516aae0b06e7050f@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > syzbot has found a reproducer for the following crash on: > > HEAD commit: eb38401c779d net: stmmac: Populate missing callbacks in HW.. > git tree: net-next > console output: https://syzkaller.appspot.com/x/log.txt?x=16d0820f800000 > kernel config: https://syzkaller.appspot.com/x/.config?x=b632d8e2c2ab2c1 > dashboard link: https://syzkaller.appspot.com/bug?extid=4006516aae0b06e7050f > compiler: gcc (GCC) 8.0.1 20180413 (experimental) > syzkaller repro:https://syzkaller.appspot.com/x/repro.syz?x=10f6927b800000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15b7a20f800000 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+4006516aae0b06e7050f@xxxxxxxxxxxxxxxxxxxxxxxxx Still happens. Perhaps this is crypto-related, not net-related? That's why net maintainers are not looking at this? +crypto maintainers > INFO: task syz-executor793:4489 blocked for more than 120 seconds. > Not tainted 4.17.0-rc4+ #52 > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > syz-executor793 D23464 4489 4486 0x00000000 > Call Trace: > context_switch kernel/sched/core.c:2848 [inline] > __schedule+0x801/0x1e30 kernel/sched/core.c:3490 > schedule+0xef/0x430 kernel/sched/core.c:3549 > schedule_timeout+0x1b5/0x240 kernel/time/timer.c:1777 > do_wait_for_common kernel/sched/completion.c:83 [inline] > __wait_for_common kernel/sched/completion.c:104 [inline] > wait_for_common kernel/sched/completion.c:115 [inline] > wait_for_completion+0x3e7/0x870 kernel/sched/completion.c:136 > crypto_wait_req include/linux/crypto.h:512 [inline] > tls_do_encryption net/tls/tls_sw.c:217 [inline] > tls_push_record+0xedc/0x13e0 net/tls/tls_sw.c:248 > tls_sw_sendmsg+0x8d7/0x12b0 net/tls/tls_sw.c:440 > inet_sendmsg+0x19f/0x690 net/ipv4/af_inet.c:798 > sock_sendmsg_nosec net/socket.c:629 [inline] > sock_sendmsg+0xd5/0x120 net/socket.c:639 > __sys_sendto+0x3d7/0x670 net/socket.c:1789 > __do_sys_sendto net/socket.c:1801 [inline] > __se_sys_sendto net/socket.c:1797 [inline] > __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1797 > do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 > entry_SYSCALL_64_after_hwframe+0x49/0xbe > RIP: 0033:0x4457d9 > RSP: 002b:00007fa388d06da8 EFLAGS: 00000216 ORIG_RAX: 000000000000002c > RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 00000000004457d9 > RDX: 00000000fffffdef RSI: 00000000200005c0 RDI: 0000000000000022 > RBP: 00000000006dac20 R08: 0000000020000000 R09: 000000000000001c > R10: 0000000000000000 R11: 0000000000000216 R12: 0000000000000000 > R13: 00007ffd5148ecaf R14: 00007fa388d079c0 R15: 0000000000000001 > > Showing all locks held in the system: > 2 locks held by khungtaskd/892: > #0: 000000009dfaae0c (rcu_read_lock){....}, at: > check_hung_uninterruptible_tasks kernel/hung_task.c:175 [inline] > #0: 000000009dfaae0c (rcu_read_lock){....}, at: watchdog+0x1ff/0xf60 > kernel/hung_task.c:249 > #1: 0000000058f79a8d (tasklist_lock){.+.+}, at: > debug_show_all_locks+0xde/0x34a kernel/locking/lockdep.c:4470 > 1 lock held by rsyslogd/4370: > #0: 0000000059c3c7ae (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1a9/0x1e0 > fs/file.c:766 > 2 locks held by getty/4460: > #0: 00000000e25a52c3 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 > drivers/tty/tty_ldsem.c:365 > #1: 000000002caea50f (&ldata->atomic_read_lock){+.+.}, at: > n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 > 2 locks held by getty/4461: > #0: 00000000d38c9806 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 > drivers/tty/tty_ldsem.c:365 > #1: 00000000eaffe99d (&ldata->atomic_read_lock){+.+.}, at: > n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 > 2 locks held by getty/4462: > #0: 00000000cec6abe7 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 > drivers/tty/tty_ldsem.c:365 > #1: 0000000000afd91c (&ldata->atomic_read_lock){+.+.}, at: > n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 > 2 locks held by getty/4463: > #0: 000000003456fca5 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 > drivers/tty/tty_ldsem.c:365 > #1: 0000000038a65d91 (&ldata->atomic_read_lock){+.+.}, at: > n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 > 2 locks held by getty/4464: > #0: 0000000001e783b1 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 > drivers/tty/tty_ldsem.c:365 > #1: 000000003ecd2e34 (&ldata->atomic_read_lock){+.+.}, at: > n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 > 2 locks held by getty/4465: > #0: 000000007ef8b451 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 > drivers/tty/tty_ldsem.c:365 > #1: 000000006996c3ed (&ldata->atomic_read_lock){+.+.}, at: > n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 > 2 locks held by getty/4466: > #0: 00000000d15d9a92 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 > drivers/tty/tty_ldsem.c:365 > #1: 00000000ee44bcf4 (&ldata->atomic_read_lock){+.+.}, at: > n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 > 1 lock held by syz-executor793/4489: > #0: 0000000008c84b0d (sk_lock-AF_INET6){+.+.}, at: lock_sock > include/net/sock.h:1474 [inline] > #0: 0000000008c84b0d (sk_lock-AF_INET6){+.+.}, at: > tls_sw_sendmsg+0x1b9/0x12b0 net/tls/tls_sw.c:384 > 1 lock held by syz-executor793/4494: > #0: 00000000f2de7555 (sk_lock-AF_INET6){+.+.}, at: lock_sock > include/net/sock.h:1474 [inline] > #0: 00000000f2de7555 (sk_lock-AF_INET6){+.+.}, at: > tls_sw_sendmsg+0x1b9/0x12b0 net/tls/tls_sw.c:384 > 1 lock held by syz-executor793/4499: > #0: 0000000058a54751 (sk_lock-AF_INET6){+.+.}, at: lock_sock > include/net/sock.h:1474 [inline] > #0: 0000000058a54751 (sk_lock-AF_INET6){+.+.}, at: > tls_sw_sendmsg+0x1b9/0x12b0 net/tls/tls_sw.c:384 > 1 lock held by syz-executor793/4504: > #0: 0000000045694cb9 (sk_lock-AF_INET6){+.+.}, at: lock_sock > include/net/sock.h:1474 [inline] > #0: 0000000045694cb9 (sk_lock-AF_INET6){+.+.}, at: > tls_sw_sendmsg+0x1b9/0x12b0 net/tls/tls_sw.c:384 > 1 lock held by syz-executor793/4509: > #0: 00000000b663e61f (sk_lock-AF_INET6){+.+.}, at: lock_sock > include/net/sock.h:1474 [inline] > #0: 00000000b663e61f (sk_lock-AF_INET6){+.+.}, at: > tls_sw_sendmsg+0x1b9/0x12b0 net/tls/tls_sw.c:384 > 1 lock held by syz-executor793/4514: > #0: 00000000603baf06 (sk_lock-AF_INET6){+.+.}, at: lock_sock > include/net/sock.h:1474 [inline] > #0: 00000000603baf06 (sk_lock-AF_INET6){+.+.}, at: > tls_sw_sendmsg+0x1b9/0x12b0 net/tls/tls_sw.c:384 > 1 lock held by syz-executor793/4519: > #0: 00000000344afb7e (sk_lock-AF_INET6){+.+.}, at: lock_sock > include/net/sock.h:1474 [inline] > #0: 00000000344afb7e (sk_lock-AF_INET6){+.+.}, at: > tls_sw_sendmsg+0x1b9/0x12b0 net/tls/tls_sw.c:384 > 1 lock held by syz-executor793/4524: > #0: 000000004aa3e1ce (sk_lock-AF_INET6){+.+.}, at: lock_sock > include/net/sock.h:1474 [inline] > #0: 000000004aa3e1ce (sk_lock-AF_INET6){+.+.}, at: > tls_sw_sendmsg+0x1b9/0x12b0 net/tls/tls_sw.c:384 > 1 lock held by syz-executor793/4529: > #0: 00000000b6c4b2ea (sk_lock-AF_INET6){+.+.}, at: lock_sock > include/net/sock.h:1474 [inline] > #0: 00000000b6c4b2ea (sk_lock-AF_INET6){+.+.}, at: > tls_sw_sendmsg+0x1b9/0x12b0 net/tls/tls_sw.c:384 > 1 lock held by syz-executor793/4534: > #0: 000000005bae881e (sk_lock-AF_INET6){+.+.}, at: lock_sock > include/net/sock.h:1474 [inline] > #0: 000000005bae881e (sk_lock-AF_INET6){+.+.}, at: > tls_sw_sendmsg+0x1b9/0x12b0 net/tls/tls_sw.c:384 > 1 lock held by syz-executor793/4539: > #0: 000000004b04f235 (sk_lock-AF_INET6){+.+.}, at: lock_sock > include/net/sock.h:1474 [inline] > #0: 000000004b04f235 (sk_lock-AF_INET6){+.+.}, at: > tls_sw_sendmsg+0x1b9/0x12b0 net/tls/tls_sw.c:384 > 1 lock held by syz-executor793/4544: > #0: 00000000b5888be7 (sk_lock-AF_INET6){+.+.}, at: lock_sock > include/net/sock.h:1474 [inline] > #0: 00000000b5888be7 (sk_lock-AF_INET6){+.+.}, at: > tls_sw_sendmsg+0x1b9/0x12b0 net/tls/tls_sw.c:384 > 1 lock held by syz-executor793/4549: > #0: 00000000e902c819 (sk_lock-AF_INET6){+.+.}, at: lock_sock > include/net/sock.h:1474 [inline] > #0: 00000000e902c819 (sk_lock-AF_INET6){+.+.}, at: > tls_sw_sendmsg+0x1b9/0x12b0 net/tls/tls_sw.c:384 > 1 lock held by syz-executor793/4554: > #0: 000000009cd1d95e (sk_lock-AF_INET6){+.+.}, at: lock_sock > include/net/sock.h:1474 [inline] > #0: 000000009cd1d95e (sk_lock-AF_INET6){+.+.}, at: > tls_sw_sendmsg+0x1b9/0x12b0 net/tls/tls_sw.c:384 > 1 lock held by syz-executor793/4559: > #0: 000000001f3edf17 (sk_lock-AF_INET6){+.+.}, at: lock_sock > include/net/sock.h:1474 [inline] > #0: 000000001f3edf17 (sk_lock-AF_INET6){+.+.}, at: > tls_sw_sendmsg+0x1b9/0x12b0 net/tls/tls_sw.c:384 > 1 lock held by syz-executor793/4563: > #0: 00000000802085f8 (sk_lock-AF_INET6){+.+.}, at: lock_sock > include/net/sock.h:1474 [inline] > #0: 00000000802085f8 (sk_lock-AF_INET6){+.+.}, at: > tls_sw_sendmsg+0x1b9/0x12b0 net/tls/tls_sw.c:384 > > ============================================= > > NMI backtrace for cpu 0 > CPU: 0 PID: 892 Comm: khungtaskd Not tainted 4.17.0-rc4+ #52 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > Call Trace: > __dump_stack lib/dump_stack.c:77 [inline] > dump_stack+0x1b9/0x294 lib/dump_stack.c:113 > nmi_cpu_backtrace.cold.4+0x19/0xce lib/nmi_backtrace.c:103 > nmi_trigger_cpumask_backtrace+0x151/0x192 lib/nmi_backtrace.c:62 > arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 > trigger_all_cpu_backtrace include/linux/nmi.h:138 [inline] > check_hung_task kernel/hung_task.c:132 [inline] > check_hung_uninterruptible_tasks kernel/hung_task.c:190 [inline] > watchdog+0xc10/0xf60 kernel/hung_task.c:249 > kthread+0x345/0x410 kernel/kthread.c:238 > ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 > Sending NMI from CPU 0 to CPUs 1: > NMI backtrace for cpu 1 > CPU: 1 PID: 4486 Comm: sshd Not tainted 4.17.0-rc4+ #52 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > RIP: 0010:__debug_object_init+0x25/0x12c0 lib/debugobjects.c:371 > RSP: 0018:ffff8801b30f73d0 EFLAGS: 00000a02 > RAX: 1ffff1003661ee3d RBX: ffff8801b30f7440 RCX: ffffffff877175fb > RDX: 0000000000000001 RSI: ffffffff88d9a5e0 RDI: ffff8801b30f7440 > RBP: ffff8801b30f73f0 R08: ffff8801b0a10740 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801b30f73c8 > R13: dffffc0000000000 R14: ffff8801b30f74c0 R15: 0000000000000001 > FS: 00007f15863b87c0(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007f38c25af9ce CR3: 00000001d0b17000 CR4: 00000000001406e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > debug_object_init_on_stack+0x19/0x20 lib/debugobjects.c:444 > hrtimer_init_on_stack kernel/time/hrtimer.c:435 [inline] > schedule_hrtimeout_range_clock+0xcc/0x470 kernel/time/hrtimer.c:1936 > schedule_hrtimeout_range+0x2a/0x40 kernel/time/hrtimer.c:1989 > poll_schedule_timeout+0x11a/0x200 fs/select.c:243 > do_select+0x1606/0x1ae0 fs/select.c:581 > core_sys_select+0x768/0xb60 fs/select.c:655 > kern_select+0x1b7/0x250 fs/select.c:696 > __do_sys_select fs/select.c:705 [inline] > __se_sys_select fs/select.c:702 [inline] > __x64_sys_select+0xbe/0x150 fs/select.c:702 > do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 > entry_SYSCALL_64_after_hwframe+0x49/0xbe > RIP: 0033:0x7f1584758dd3 > RSP: 002b:00007ffe596ca1f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000017 > RAX: ffffffffffffffda RBX: 00007ffe596ca280 RCX: 00007f1584758dd3 > RDX: 000055a15612aab0 RSI: 000055a15612aad0 RDI: 000000000000000c > RBP: 000055a1559bf8dc R08: 00007ffe596ca220 R09: 0101010101010101 > R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe596ca288 > R13: 0000000000000000 R14: 00007ffe596ca278 R15: 00007ffe596ca27c > Code: 84 00 00 00 00 00 55 48 89 e5 41 57 41 56 48 8d 85 f8 fd ff ff 41 55 > 48 c1 e8 03 49 bd 00 00 00 00 00 fc ff df 41 54 4c 8d 65 d8 <53> 48 89 fb 48 > 81 ec 30 02 00 00 48 89 85 d8 fd ff ff 4c 01 e8
