bisecting fixing commit since 68d7a45eec101bc1550294c0e675a490c047b2e5 building syzkaller on b0e8efcb4b0aac61f4647a76bbe54a5d38a370ba testing commit 68d7a45eec101bc1550294c0e675a490c047b2e5 with gcc (GCC) 8.1.0 kernel signature: f65a5de5710ba88acccd1bb5dfcee762b8c1557faedbce6a387cc0c529af609f all runs: crashed: INFO: task hung in aead_recvmsg testing current HEAD a41ba30d9df20fe141c92aacbb56b6b077f19716 testing commit a41ba30d9df20fe141c92aacbb56b6b077f19716 with gcc (GCC) 8.1.0 kernel signature: c749ffa1c2d188241b2fa906eb16730cc51267f391144b44c9ae7ec4cb0f145d all runs: crashed: INFO: task hung in aead_recvmsg revisions tested: 2, total time: 30m36.22244925s (build: 16m2.034008322s, test: 14m0.193370406s) the crash still happens on HEAD commit msg: Linux 4.14.181 crash: INFO: task hung in aead_recvmsg IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready 8021q: adding VLAN 0 to HW filter on device batadv0 INFO: task syz-executor.2:7074 blocked for more than 140 seconds. Not tainted 4.14.181-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D27976 7074 6108 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x786/0x1d30 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 schedule_timeout+0x6ea/0xcc0 kernel/time/timer.c:1723 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common kernel/sched/completion.c:123 [inline] wait_for_completion+0x263/0x440 kernel/sched/completion.c:144 af_alg_wait_for_completion+0x1f/0x90 crypto/af_alg.c:495 _aead_recvmsg crypto/algif_aead.c:314 [inline] aead_recvmsg+0x1193/0x2680 crypto/algif_aead.c:335 sock_recvmsg_nosec net/socket.c:819 [inline] sock_recvmsg+0xb9/0xf0 net/socket.c:826 sock_read_iter+0x237/0x410 net/socket.c:903 call_read_iter include/linux/fs.h:1772 [inline] do_iter_readv_writev+0x3c9/0x910 fs/read_write.c:673 do_iter_read+0x1de/0x5a0 fs/read_write.c:917 vfs_readv+0xb6/0x110 fs/read_write.c:981 do_readv+0x10d/0x320 fs/read_write.c:1014 SYSC_readv fs/read_write.c:1101 [inline] SyS_readv+0xb/0x10 fs/read_write.c:1098 do_syscall_64+0x1c9/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x458c29 RSP: 002b:00007f8195e8cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458c29 RDX: 0000000000000001 RSI: 00000000200007c0 RDI: 0000000000000004 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8195e8d6d4 R13: 00000000004c5985 R14: 00000000004d9fe0 R15: 00000000ffffffff INFO: task syz-executor.4:7087 blocked for more than 140 seconds. Not tainted 4.14.181-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D28200 7087 6110 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x786/0x1d30 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 schedule_timeout+0x6ea/0xcc0 kernel/time/timer.c:1723 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common kernel/sched/completion.c:123 [inline] wait_for_completion+0x263/0x440 kernel/sched/completion.c:144 af_alg_wait_for_completion+0x1f/0x90 crypto/af_alg.c:495 _aead_recvmsg crypto/algif_aead.c:314 [inline] aead_recvmsg+0x1193/0x2680 crypto/algif_aead.c:335 sock_recvmsg_nosec net/socket.c:819 [inline] sock_recvmsg+0xb9/0xf0 net/socket.c:826 sock_read_iter+0x237/0x410 net/socket.c:903 call_read_iter include/linux/fs.h:1772 [inline] do_iter_readv_writev+0x3c9/0x910 fs/read_write.c:673 do_iter_read+0x1de/0x5a0 fs/read_write.c:917 vfs_readv+0xb6/0x110 fs/read_write.c:981 do_readv+0x10d/0x320 fs/read_write.c:1014 SYSC_readv fs/read_write.c:1101 [inline] SyS_readv+0xb/0x10 fs/read_write.c:1098 do_syscall_64+0x1c9/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x458c29 RSP: 002b:00007f00d3ce8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458c29 RDX: 0000000000000001 RSI: 00000000200007c0 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f00d3ce96d4 R13: 00000000004c5985 R14: 00000000004d9fe0 R15: 00000000ffffffff INFO: task syz-executor.4:7090 blocked for more than 140 seconds. Not tainted 4.14.181-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D26920 7090 6110 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x786/0x1d30 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 schedule_timeout+0x6ea/0xcc0 kernel/time/timer.c:1723 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common kernel/sched/completion.c:123 [inline] wait_for_completion+0x263/0x440 kernel/sched/completion.c:144 af_alg_wait_for_completion+0x1f/0x90 crypto/af_alg.c:495 _aead_recvmsg crypto/algif_aead.c:314 [inline] aead_recvmsg+0x1193/0x2680 crypto/algif_aead.c:335 sock_recvmsg_nosec net/socket.c:819 [inline] sock_recvmsg+0xb9/0xf0 net/socket.c:826 sock_read_iter+0x237/0x410 net/socket.c:903 call_read_iter include/linux/fs.h:1772 [inline] do_iter_readv_writev+0x3c9/0x910 fs/read_write.c:673 do_iter_read+0x1de/0x5a0 fs/read_write.c:917 vfs_readv+0xb6/0x110 fs/read_write.c:981 do_readv+0x10d/0x320 fs/read_write.c:1014 SYSC_readv fs/read_write.c:1101 [inline] SyS_readv+0xb/0x10 fs/read_write.c:1098 do_syscall_64+0x1c9/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x458c29 RSP: 002b:00007f00d3cc7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458c29 RDX: 0000000000000001 RSI: 00000000200007c0 RDI: 0000000000000004 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f00d3cc86d4 R13: 00000000004c5985 R14: 00000000004d9fe0 R15: 00000000ffffffff INFO: task syz-executor.1:7103 blocked for more than 140 seconds. Not tainted 4.14.181-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D27976 7103 6117 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x786/0x1d30 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 schedule_timeout+0x6ea/0xcc0 kernel/time/timer.c:1723 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common kernel/sched/completion.c:123 [inline] wait_for_completion+0x263/0x440 kernel/sched/completion.c:144 af_alg_wait_for_completion+0x1f/0x90 crypto/af_alg.c:495 _aead_recvmsg crypto/algif_aead.c:314 [inline] aead_recvmsg+0x1193/0x2680 crypto/algif_aead.c:335 sock_recvmsg_nosec net/socket.c:819 [inline] sock_recvmsg+0xb9/0xf0 net/socket.c:826 sock_read_iter+0x237/0x410 net/socket.c:903 call_read_iter include/linux/fs.h:1772 [inline] do_iter_readv_writev+0x3c9/0x910 fs/read_write.c:673 do_iter_read+0x1de/0x5a0 fs/read_write.c:917 vfs_readv+0xb6/0x110 fs/read_write.c:981 do_readv+0x10d/0x320 fs/read_write.c:1014 SYSC_readv fs/read_write.c:1101 [inline] SyS_readv+0xb/0x10 fs/read_write.c:1098 do_syscall_64+0x1c9/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x458c29 RSP: 002b:00007fc0e6d1ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458c29 RDX: 0000000000000001 RSI: 00000000200007c0 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc0e6d1f6d4 R13: 00000000004c5985 R14: 00000000004d9fe0 R15: 00000000ffffffff INFO: task syz-executor.1:7110 blocked for more than 140 seconds. Not tainted 4.14.181-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D27048 7110 6117 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x786/0x1d30 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 schedule_timeout+0x6ea/0xcc0 kernel/time/timer.c:1723 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common kernel/sched/completion.c:123 [inline] wait_for_completion+0x263/0x440 kernel/sched/completion.c:144 af_alg_wait_for_completion+0x1f/0x90 crypto/af_alg.c:495 _aead_recvmsg crypto/algif_aead.c:314 [inline] aead_recvmsg+0x1193/0x2680 crypto/algif_aead.c:335 sock_recvmsg_nosec net/socket.c:819 [inline] sock_recvmsg+0xb9/0xf0 net/socket.c:826 sock_read_iter+0x237/0x410 net/socket.c:903 call_read_iter include/linux/fs.h:1772 [inline] do_iter_readv_writev+0x3c9/0x910 fs/read_write.c:673 do_iter_read+0x1de/0x5a0 fs/read_write.c:917 vfs_readv+0xb6/0x110 fs/read_write.c:981 do_readv+0x10d/0x320 fs/read_write.c:1014 SYSC_readv fs/read_write.c:1101 [inline] SyS_readv+0xb/0x10 fs/read_write.c:1098 do_syscall_64+0x1c9/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x458c29 RSP: 002b:00007fc0e6cfdc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458c29 RDX: 0000000000000001 RSI: 00000000200007c0 RDI: 0000000000000004 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc0e6cfe6d4 R13: 00000000004c5985 R14: 00000000004d9fe0 R15: 00000000ffffffff INFO: task syz-executor.3:7119 blocked for more than 140 seconds. Not tainted 4.14.181-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D27736 7119 6116 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x786/0x1d30 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 schedule_timeout+0x6ea/0xcc0 kernel/time/timer.c:1723 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common kernel/sched/completion.c:123 [inline] wait_for_completion+0x263/0x440 kernel/sched/completion.c:144 af_alg_wait_for_completion+0x1f/0x90 crypto/af_alg.c:495 _aead_recvmsg crypto/algif_aead.c:314 [inline] aead_recvmsg+0x1193/0x2680 crypto/algif_aead.c:335 sock_recvmsg_nosec net/socket.c:819 [inline] sock_recvmsg+0xb9/0xf0 net/socket.c:826 sock_read_iter+0x237/0x410 net/socket.c:903 call_read_iter include/linux/fs.h:1772 [inline] do_iter_readv_writev+0x3c9/0x910 fs/read_write.c:673 do_iter_read+0x1de/0x5a0 fs/read_write.c:917 vfs_readv+0xb6/0x110 fs/read_write.c:981 do_readv+0x10d/0x320 fs/read_write.c:1014 SYSC_readv fs/read_write.c:1101 [inline] SyS_readv+0xb/0x10 fs/read_write.c:1098 do_syscall_64+0x1c9/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x458c29 RSP: 002b:00007f1d43e0ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458c29 RDX: 0000000000000001 RSI: 00000000200007c0 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1d43e0b6d4 R13: 00000000004c5985 R14: 00000000004d9fe0 R15: 00000000ffffffff INFO: task syz-executor.3:7122 blocked for more than 140 seconds. Not tainted 4.14.181-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D27048 7122 6116 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x786/0x1d30 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 schedule_timeout+0x6ea/0xcc0 kernel/time/timer.c:1723 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common kernel/sched/completion.c:123 [inline] wait_for_completion+0x263/0x440 kernel/sched/completion.c:144 af_alg_wait_for_completion+0x1f/0x90 crypto/af_alg.c:495 _aead_recvmsg crypto/algif_aead.c:314 [inline] aead_recvmsg+0x1193/0x2680 crypto/algif_aead.c:335 sock_recvmsg_nosec net/socket.c:819 [inline] sock_recvmsg+0xb9/0xf0 net/socket.c:826 sock_read_iter+0x237/0x410 net/socket.c:903 call_read_iter include/linux/fs.h:1772 [inline] do_iter_readv_writev+0x3c9/0x910 fs/read_write.c:673 do_iter_read+0x1de/0x5a0 fs/read_write.c:917 vfs_readv+0xb6/0x110 fs/read_write.c:981 do_readv+0x10d/0x320 fs/read_write.c:1014 SYSC_readv fs/read_write.c:1101 [inline] SyS_readv+0xb/0x10 fs/read_write.c:1098 do_syscall_64+0x1c9/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x458c29 RSP: 002b:00007f1d43de9c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458c29 RDX: 0000000000000001 RSI: 00000000200007c0 RDI: 0000000000000004 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1d43dea6d4 R13: 00000000004c5985 R14: 00000000004d9fe0 R15: 00000000ffffffff INFO: task syz-executor.0:7131 blocked for more than 140 seconds. Not tainted 4.14.181-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D27512 7131 6118 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x786/0x1d30 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 schedule_timeout+0x6ea/0xcc0 kernel/time/timer.c:1723 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common kernel/sched/completion.c:123 [inline] wait_for_completion+0x263/0x440 kernel/sched/completion.c:144 af_alg_wait_for_completion+0x1f/0x90 crypto/af_alg.c:495 _aead_recvmsg crypto/algif_aead.c:314 [inline] aead_recvmsg+0x1193/0x2680 crypto/algif_aead.c:335 sock_recvmsg_nosec net/socket.c:819 [inline] sock_recvmsg+0xb9/0xf0 net/socket.c:826 sock_read_iter+0x237/0x410 net/socket.c:903 call_read_iter include/linux/fs.h:1772 [inline] do_iter_readv_writev+0x3c9/0x910 fs/read_write.c:673 do_iter_read+0x1de/0x5a0 fs/read_write.c:917 vfs_readv+0xb6/0x110 fs/read_write.c:981 do_readv+0x10d/0x320 fs/read_write.c:1014 SYSC_readv fs/read_write.c:1101 [inline] SyS_readv+0xb/0x10 fs/read_write.c:1098 do_syscall_64+0x1c9/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x458c29 RSP: 002b:00007f8d5ed7dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458c29 RDX: 0000000000000001 RSI: 00000000200007c0 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8d5ed7e6d4 R13: 00000000004c5985 R14: 00000000004d9fe0 R15: 00000000ffffffff INFO: task syz-executor.0:7138 blocked for more than 140 seconds. Not tainted 4.14.181-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D27048 7138 6118 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x786/0x1d30 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 schedule_timeout+0x6ea/0xcc0 kernel/time/timer.c:1723 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common kernel/sched/completion.c:123 [inline] wait_for_completion+0x263/0x440 kernel/sched/completion.c:144 af_alg_wait_for_completion+0x1f/0x90 crypto/af_alg.c:495 _aead_recvmsg crypto/algif_aead.c:314 [inline] aead_recvmsg+0x1193/0x2680 crypto/algif_aead.c:335 sock_recvmsg_nosec net/socket.c:819 [inline] sock_recvmsg+0xb9/0xf0 net/socket.c:826 sock_read_iter+0x237/0x410 net/socket.c:903 call_read_iter include/linux/fs.h:1772 [inline] do_iter_readv_writev+0x3c9/0x910 fs/read_write.c:673 do_iter_read+0x1de/0x5a0 fs/read_write.c:917 vfs_readv+0xb6/0x110 fs/read_write.c:981 do_readv+0x10d/0x320 fs/read_write.c:1014 SYSC_readv fs/read_write.c:1101 [inline] SyS_readv+0xb/0x10 fs/read_write.c:1098 do_syscall_64+0x1c9/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x458c29 RSP: 002b:00007f8d5ed5cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458c29 RDX: 0000000000000001 RSI: 00000000200007c0 RDI: 0000000000000004 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8d5ed5d6d4 R13: 00000000004c5985 R14: 00000000004d9fe0 R15: 00000000ffffffff INFO: task syz-executor.5:7133 blocked for more than 140 seconds. Not tainted 4.14.181-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D27512 7133 6113 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x786/0x1d30 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 schedule_timeout+0x6ea/0xcc0 kernel/time/timer.c:1723 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common kernel/sched/completion.c:123 [inline] wait_for_completion+0x263/0x440 kernel/sched/completion.c:144 af_alg_wait_for_completion+0x1f/0x90 crypto/af_alg.c:495 _aead_recvmsg crypto/algif_aead.c:314 [inline] aead_recvmsg+0x1193/0x2680 crypto/algif_aead.c:335 sock_recvmsg_nosec net/socket.c:819 [inline] sock_recvmsg+0xb9/0xf0 net/socket.c:826 sock_read_iter+0x237/0x410 net/socket.c:903 call_read_iter include/linux/fs.h:1772 [inline] do_iter_readv_writev+0x3c9/0x910 fs/read_write.c:673 do_iter_read+0x1de/0x5a0 fs/read_write.c:917 vfs_readv+0xb6/0x110 fs/read_write.c:981 do_readv+0x10d/0x320 fs/read_write.c:1014 SYSC_readv fs/read_write.c:1101 [inline] SyS_readv+0xb/0x10 fs/read_write.c:1098 do_syscall_64+0x1c9/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x458c29 RSP: 002b:00007f8a0c31cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458c29 RDX: 0000000000000001 RSI: 00000000200007c0 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8a0c31d6d4 R13: 00000000004c5985 R14: 00000000004d9fe0 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1012: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4548 1 lock held by syz-executor.2/7074: #0: (sk_lock-AF_ALG){+.+.}, at: [] lock_sock include/net/sock.h:1467 [inline] #0: (sk_lock-AF_ALG){+.+.}, at: [] af_alg_wait_for_data+0x1ab/0x420 crypto/af_alg.c:802 1 lock held by syz-executor.4/7087: #0: (sk_lock-AF_ALG){+.+.}, at: [] lock_sock include/net/sock.h:1467 [inline] #0: (sk_lock-AF_ALG){+.+.}, at: [] af_alg_wait_for_data+0x1ab/0x420 crypto/af_alg.c:802 1 lock held by syz-executor.4/7090: #0: (sk_lock-AF_ALG){+.+.}, at: [] lock_sock include/net/sock.h:1467 [inline] #0: (sk_lock-AF_ALG){+.+.}, at: [] af_alg_wait_for_data+0x1ab/0x420 crypto/af_alg.c:802 1 lock held by syz-executor.1/7103: #0: (sk_lock-AF_ALG){+.+.}, at: [] lock_sock include/net/sock.h:1467 [inline] #0: (sk_lock-AF_ALG){+.+.}, at: [] af_alg_wait_for_data+0x1ab/0x420 crypto/af_alg.c:802 1 lock held by syz-executor.1/7110: #0: (sk_lock-AF_ALG){+.+.}, at: [] lock_sock include/net/sock.h:1467 [inline] #0: (sk_lock-AF_ALG){+.+.}, at: [] af_alg_wait_for_data+0x1ab/0x420 crypto/af_alg.c:802 1 lock held by syz-executor.3/7119: #0: (sk_lock-AF_ALG){+.+.}, at: [] lock_sock include/net/sock.h:1467 [inline] #0: (sk_lock-AF_ALG){+.+.}, at: [] af_alg_wait_for_data+0x1ab/0x420 crypto/af_alg.c:802 1 lock held by syz-executor.3/7122: #0: (sk_lock-AF_ALG){+.+.}, at: [] lock_sock include/net/sock.h:1467 [inline] #0: (sk_lock-AF_ALG){+.+.}, at: [] af_alg_wait_for_data+0x1ab/0x420 crypto/af_alg.c:802 1 lock held by syz-executor.0/7131: #0: (sk_lock-AF_ALG){+.+.}, at: [] lock_sock include/net/sock.h:1467 [inline] #0: (sk_lock-AF_ALG){+.+.}, at: [] af_alg_wait_for_data+0x1ab/0x420 crypto/af_alg.c:802 1 lock held by syz-executor.0/7138: #0: (sk_lock-AF_ALG){+.+.}, at: [] lock_sock include/net/sock.h:1467 [inline] #0: (sk_lock-AF_ALG){+.+.}, at: [] af_alg_wait_for_data+0x1ab/0x420 crypto/af_alg.c:802 1 lock held by syz-executor.5/7133: #0: (sk_lock-AF_ALG){+.+.}, at: [] lock_sock include/net/sock.h:1467 [inline] #0: (sk_lock-AF_ALG){+.+.}, at: [] af_alg_wait_for_data+0x1ab/0x420 crypto/af_alg.c:802 1 lock held by syz-executor.5/7146: #0: (sk_lock-AF_ALG){+.+.}, at: [] lock_sock include/net/sock.h:1467 [inline] #0: (sk_lock-AF_ALG){+.+.}, at: [] af_alg_wait_for_data+0x1ab/0x420 crypto/af_alg.c:802 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1012 Comm: khungtaskd Not tainted 4.14.181-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xf7/0x13b lib/dump_stack.c:58 nmi_cpu_backtrace.cold.4+0x3e/0x76 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0xe6/0x11a 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:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x522/0xb40 kernel/hung_task.c:274 kthread+0x33b/0x410 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:404 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 3442 Comm: systemd-journal Not tainted 4.14.181-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880949d06c0 task.stack: ffff8880949d8000 RIP: 0010:bytes_is_nonzero mm/kasan/kasan.c:167 [inline] RIP: 0010:memory_is_nonzero mm/kasan/kasan.c:184 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/kasan.c:210 [inline] RIP: 0010:memory_is_poisoned mm/kasan/kasan.c:241 [inline] RIP: 0010:check_memory_region_inline mm/kasan/kasan.c:257 [inline] RIP: 0010:check_memory_region+0x11e/0x1b0 mm/kasan/kasan.c:267 RSP: 0018:ffff8880949df7b0 EFLAGS: 00000246 RAX: ffffed101293bf23 RBX: ffffed101293bf24 RCX: ffffffff829924ed RDX: 0000000000000001 RSI: 0000000000000014 RDI: ffff8880949df910 RBP: ffff8880949df7c8 R08: ffffed101293bf25 R09: ffffed101293bf22 R10: ffffed101293bf24 R11: ffff8880949df923 R12: ffffed101293bf25 R13: ffff888089c65e44 R14: 0000000000000061 R15: 0000000000800000 FS: 00007fc178baf8c0(0000) GS:ffff8880aee00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc175f9d000 CR3: 00000000950ec000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: memcpy+0x37/0x50 mm/kasan/kasan.c:303 memcpy include/linux/string.h:347 [inline] avc_has_perm_noaudit+0x1dd/0x400 security/selinux/avc.c:1112 selinux_inode_permission+0x2b3/0x450 security/selinux/hooks.c:3106 security_inode_permission+0x99/0xd0 security/security.c:698 __inode_permission+0xae/0x2a0 fs/namei.c:434 inode_permission+0x1c/0xf0 fs/namei.c:476 may_lookup fs/namei.c:1711 [inline] link_path_walk+0x161/0x1550 fs/namei.c:2097 path_openat+0x176/0x3bd0 fs/namei.c:3568 do_filp_open+0x16b/0x220 fs/namei.c:3603 do_sys_open+0x1c2/0x340 fs/open.c:1081 SYSC_open fs/open.c:1099 [inline] SyS_open+0x19/0x20 fs/open.c:1094 do_syscall_64+0x1c9/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7fc17813f840 RSP: 002b:00007fffc6db6728 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007fffc6db6a30 RCX: 00007fc17813f840 RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000055df34a1c150 RBP: 000000000000000d R08: 0000000000000000 R09: 00000000ffffffff R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff R13: 000055df34a10060 R14: 00007fffc6db69f0 R15: 000055df34a1be80 Code: 4d 89 e0 49 29 c0 e9 6c ff ff ff 4d 85 c0 74 ba 48 b8 01 00 00 00 00 fc ff df 4d 01 c8 48 01 d8 41 80 39 00 74 08 e9 8c 00 00 00 <48> 89 d8 4c 39 c0 74 97 80 38 00 48 8d 58 01 74 ef eb 87 4c 89