bisecting fixing commit since c98875d930e915d01e8c40c7d3c16f00b3c8abe1 building syzkaller on 53199d6e8aee5f0ebd3775d2b1c674f4e6e64e2b testing commit c98875d930e915d01e8c40c7d3c16f00b3c8abe1 with gcc (GCC) 8.1.0 kernel signature: 70785ccb75947649f05a746a328dd15792660f2b2f728e347f7f75485e1f3b66 all runs: crashed: INFO: task hung in aead_recvmsg testing current HEAD fdc072324f3c66190a20f57490b4842a391d8233 testing commit fdc072324f3c66190a20f57490b4842a391d8233 with gcc (GCC) 8.1.0 kernel signature: 552a29f893089ac29b372bbd253fe91b92a5e92f54f186e0ae3eb72317c11c28 all runs: crashed: INFO: task hung in aead_recvmsg revisions tested: 2, total time: 30m33.054315902s (build: 17m59.989235566s, test: 11m27.020251791s) the crash still happens on HEAD commit msg: Linux 4.19.120 crash: INFO: task hung in aead_recvmsg 8021q: adding VLAN 0 to HW filter on device batadv0 8021q: adding VLAN 0 to HW filter on device batadv0 IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready 8021q: adding VLAN 0 to HW filter on device batadv0 INFO: task syz-executor.5:7314 blocked for more than 140 seconds. Not tainted 4.19.120-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D27624 7314 6255 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x792/0x1c20 kernel/sched/core.c:3515 schedule+0x7f/0x1b0 kernel/sched/core.c:3559 schedule_timeout+0x6d7/0xda0 kernel/time/timer.c:1782 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+0x282/0x460 kernel/sched/completion.c:136 crypto_wait_req include/linux/crypto.h:517 [inline] _aead_recvmsg crypto/algif_aead.c:313 [inline] aead_recvmsg+0x1182/0x1fb0 crypto/algif_aead.c:334 sock_recvmsg_nosec net/socket.c:795 [inline] sock_recvmsg+0xb9/0xf0 net/socket.c:802 sock_read_iter+0x252/0x430 net/socket.c:879 call_read_iter include/linux/fs.h:1815 [inline] do_iter_readv_writev+0x3f2/0x960 fs/read_write.c:679 do_iter_read+0x1db/0x580 fs/read_write.c:923 vfs_readv+0xc9/0x130 fs/read_write.c:987 do_readv+0x110/0x330 fs/read_write.c:1020 __do_sys_readv fs/read_write.c:1107 [inline] __se_sys_readv fs/read_write.c:1104 [inline] __x64_sys_readv+0x70/0xb0 fs/read_write.c:1104 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: 08 48 c7 44 24 10 04 00 00 00 e8 62 d8 fa ff 48 8b 44 24 18 48 8b 4c 24 30 48 83 c1 08 48 89 0c 24 48 89 44 24 08 48 c7 44 24 <10> 10 00 00 00 e8 3d d8 fa ff 48 8b 44 24 18 48 89 44 24 40 48 8b RSP: 002b:00007f91cb075c78 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: 00007f91cb0766d4 R13: 00000000004c5985 R14: 00000000004d9fe0 R15: 00000000ffffffff INFO: task syz-executor.5:7326 blocked for more than 140 seconds. Not tainted 4.19.120-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D27880 7326 6255 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x792/0x1c20 kernel/sched/core.c:3515 schedule+0x7f/0x1b0 kernel/sched/core.c:3559 schedule_timeout+0x6d7/0xda0 kernel/time/timer.c:1782 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+0x282/0x460 kernel/sched/completion.c:136 crypto_wait_req include/linux/crypto.h:517 [inline] _aead_recvmsg crypto/algif_aead.c:313 [inline] aead_recvmsg+0x1182/0x1fb0 crypto/algif_aead.c:334 sock_recvmsg_nosec net/socket.c:795 [inline] sock_recvmsg+0xb9/0xf0 net/socket.c:802 sock_read_iter+0x252/0x430 net/socket.c:879 call_read_iter include/linux/fs.h:1815 [inline] do_iter_readv_writev+0x3f2/0x960 fs/read_write.c:679 do_iter_read+0x1db/0x580 fs/read_write.c:923 vfs_readv+0xc9/0x130 fs/read_write.c:987 do_readv+0x110/0x330 fs/read_write.c:1020 __do_sys_readv fs/read_write.c:1107 [inline] __se_sys_readv fs/read_write.c:1104 [inline] __x64_sys_readv+0x70/0xb0 fs/read_write.c:1104 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: 08 48 c7 44 24 10 04 00 00 00 e8 62 d8 fa ff 48 8b 44 24 18 48 8b 4c 24 30 48 83 c1 08 48 89 0c 24 48 89 44 24 08 48 c7 44 24 <10> 10 00 00 00 e8 3d d8 fa ff 48 8b 44 24 18 48 89 44 24 40 48 8b RSP: 002b:00007f91cb054c78 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: 00007f91cb0556d4 R13: 00000000004c5985 R14: 00000000004d9fe0 R15: 00000000ffffffff INFO: task syz-executor.1:7312 blocked for more than 140 seconds. Not tainted 4.19.120-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28120 7312 6248 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x792/0x1c20 kernel/sched/core.c:3515 schedule+0x7f/0x1b0 kernel/sched/core.c:3559 schedule_timeout+0x6d7/0xda0 kernel/time/timer.c:1782 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+0x282/0x460 kernel/sched/completion.c:136 crypto_wait_req include/linux/crypto.h:517 [inline] _aead_recvmsg crypto/algif_aead.c:313 [inline] aead_recvmsg+0x1182/0x1fb0 crypto/algif_aead.c:334 sock_recvmsg_nosec net/socket.c:795 [inline] sock_recvmsg+0xb9/0xf0 net/socket.c:802 sock_read_iter+0x252/0x430 net/socket.c:879 call_read_iter include/linux/fs.h:1815 [inline] do_iter_readv_writev+0x3f2/0x960 fs/read_write.c:679 do_iter_read+0x1db/0x580 fs/read_write.c:923 vfs_readv+0xc9/0x130 fs/read_write.c:987 do_readv+0x110/0x330 fs/read_write.c:1020 __do_sys_readv fs/read_write.c:1107 [inline] __se_sys_readv fs/read_write.c:1104 [inline] __x64_sys_readv+0x70/0xb0 fs/read_write.c:1104 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: 08 48 c7 44 24 10 04 00 00 00 e8 62 d8 fa ff 48 8b 44 24 18 48 8b 4c 24 30 48 83 c1 08 48 89 0c 24 48 89 44 24 08 48 c7 44 24 <10> 10 00 00 00 e8 3d d8 fa ff 48 8b 44 24 18 48 89 44 24 40 48 8b RSP: 002b:00007f6ad653dc78 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: 00007f6ad653e6d4 R13: 00000000004c5985 R14: 00000000004d9fe0 R15: 00000000ffffffff INFO: task syz-executor.1:7321 blocked for more than 140 seconds. Not tainted 4.19.120-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D27880 7321 6248 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x792/0x1c20 kernel/sched/core.c:3515 schedule+0x7f/0x1b0 kernel/sched/core.c:3559 schedule_timeout+0x6d7/0xda0 kernel/time/timer.c:1782 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+0x282/0x460 kernel/sched/completion.c:136 crypto_wait_req include/linux/crypto.h:517 [inline] _aead_recvmsg crypto/algif_aead.c:313 [inline] aead_recvmsg+0x1182/0x1fb0 crypto/algif_aead.c:334 sock_recvmsg_nosec net/socket.c:795 [inline] sock_recvmsg+0xb9/0xf0 net/socket.c:802 sock_read_iter+0x252/0x430 net/socket.c:879 call_read_iter include/linux/fs.h:1815 [inline] do_iter_readv_writev+0x3f2/0x960 fs/read_write.c:679 do_iter_read+0x1db/0x580 fs/read_write.c:923 vfs_readv+0xc9/0x130 fs/read_write.c:987 do_readv+0x110/0x330 fs/read_write.c:1020 __do_sys_readv fs/read_write.c:1107 [inline] __se_sys_readv fs/read_write.c:1104 [inline] __x64_sys_readv+0x70/0xb0 fs/read_write.c:1104 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: 08 48 c7 44 24 10 04 00 00 00 e8 62 d8 fa ff 48 8b 44 24 18 48 8b 4c 24 30 48 83 c1 08 48 89 0c 24 48 89 44 24 08 48 c7 44 24 <10> 10 00 00 00 e8 3d d8 fa ff 48 8b 44 24 18 48 89 44 24 40 48 8b RSP: 002b:00007f6ad651cc78 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: 00007f6ad651d6d4 R13: 00000000004c5985 R14: 00000000004d9fe0 R15: 00000000ffffffff INFO: task syz-executor.2:7311 blocked for more than 140 seconds. Not tainted 4.19.120-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28120 7311 6254 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x792/0x1c20 kernel/sched/core.c:3515 schedule+0x7f/0x1b0 kernel/sched/core.c:3559 schedule_timeout+0x6d7/0xda0 kernel/time/timer.c:1782 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+0x282/0x460 kernel/sched/completion.c:136 crypto_wait_req include/linux/crypto.h:517 [inline] _aead_recvmsg crypto/algif_aead.c:313 [inline] aead_recvmsg+0x1182/0x1fb0 crypto/algif_aead.c:334 sock_recvmsg_nosec net/socket.c:795 [inline] sock_recvmsg+0xb9/0xf0 net/socket.c:802 sock_read_iter+0x252/0x430 net/socket.c:879 call_read_iter include/linux/fs.h:1815 [inline] do_iter_readv_writev+0x3f2/0x960 fs/read_write.c:679 do_iter_read+0x1db/0x580 fs/read_write.c:923 vfs_readv+0xc9/0x130 fs/read_write.c:987 do_readv+0x110/0x330 fs/read_write.c:1020 __do_sys_readv fs/read_write.c:1107 [inline] __se_sys_readv fs/read_write.c:1104 [inline] __x64_sys_readv+0x70/0xb0 fs/read_write.c:1104 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: 08 48 c7 44 24 10 04 00 00 00 e8 62 d8 fa ff 48 8b 44 24 18 48 8b 4c 24 30 48 83 c1 08 48 89 0c 24 48 89 44 24 08 48 c7 44 24 <10> 10 00 00 00 e8 3d d8 fa ff 48 8b 44 24 18 48 89 44 24 40 48 8b RSP: 002b:00007fdc13c92c78 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: 00007fdc13c936d4 R13: 00000000004c5985 R14: 00000000004d9fe0 R15: 00000000ffffffff INFO: task syz-executor.0:7313 blocked for more than 140 seconds. Not tainted 4.19.120-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28120 7313 6246 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x792/0x1c20 kernel/sched/core.c:3515 schedule+0x7f/0x1b0 kernel/sched/core.c:3559 schedule_timeout+0x6d7/0xda0 kernel/time/timer.c:1782 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+0x282/0x460 kernel/sched/completion.c:136 crypto_wait_req include/linux/crypto.h:517 [inline] _aead_recvmsg crypto/algif_aead.c:313 [inline] aead_recvmsg+0x1182/0x1fb0 crypto/algif_aead.c:334 sock_recvmsg_nosec net/socket.c:795 [inline] sock_recvmsg+0xb9/0xf0 net/socket.c:802 sock_read_iter+0x252/0x430 net/socket.c:879 call_read_iter include/linux/fs.h:1815 [inline] do_iter_readv_writev+0x3f2/0x960 fs/read_write.c:679 do_iter_read+0x1db/0x580 fs/read_write.c:923 vfs_readv+0xc9/0x130 fs/read_write.c:987 do_readv+0x110/0x330 fs/read_write.c:1020 __do_sys_readv fs/read_write.c:1107 [inline] __se_sys_readv fs/read_write.c:1104 [inline] __x64_sys_readv+0x70/0xb0 fs/read_write.c:1104 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: 08 48 c7 44 24 10 04 00 00 00 e8 62 d8 fa ff 48 8b 44 24 18 48 8b 4c 24 30 48 83 c1 08 48 89 0c 24 48 89 44 24 08 48 c7 44 24 <10> 10 00 00 00 e8 3d d8 fa ff 48 8b 44 24 18 48 89 44 24 40 48 8b RSP: 002b:00007f031948bc78 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: 00007f031948c6d4 R13: 00000000004c5985 R14: 00000000004d9fe0 R15: 00000000ffffffff INFO: task syz-executor.0:7327 blocked for more than 140 seconds. Not tainted 4.19.120-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D27880 7327 6246 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x792/0x1c20 kernel/sched/core.c:3515 schedule+0x7f/0x1b0 kernel/sched/core.c:3559 schedule_timeout+0x6d7/0xda0 kernel/time/timer.c:1782 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+0x282/0x460 kernel/sched/completion.c:136 crypto_wait_req include/linux/crypto.h:517 [inline] _aead_recvmsg crypto/algif_aead.c:313 [inline] aead_recvmsg+0x1182/0x1fb0 crypto/algif_aead.c:334 sock_recvmsg_nosec net/socket.c:795 [inline] sock_recvmsg+0xb9/0xf0 net/socket.c:802 sock_read_iter+0x252/0x430 net/socket.c:879 call_read_iter include/linux/fs.h:1815 [inline] do_iter_readv_writev+0x3f2/0x960 fs/read_write.c:679 do_iter_read+0x1db/0x580 fs/read_write.c:923 vfs_readv+0xc9/0x130 fs/read_write.c:987 do_readv+0x110/0x330 fs/read_write.c:1020 __do_sys_readv fs/read_write.c:1107 [inline] __se_sys_readv fs/read_write.c:1104 [inline] __x64_sys_readv+0x70/0xb0 fs/read_write.c:1104 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: 08 48 c7 44 24 10 04 00 00 00 e8 62 d8 fa ff 48 8b 44 24 18 48 8b 4c 24 30 48 83 c1 08 48 89 0c 24 48 89 44 24 08 48 c7 44 24 <10> 10 00 00 00 e8 3d d8 fa ff 48 8b 44 24 18 48 89 44 24 40 48 8b RSP: 002b:00007f031946ac78 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: 00007f031946b6d4 R13: 00000000004c5985 R14: 00000000004d9fe0 R15: 00000000ffffffff INFO: task syz-executor.3:7315 blocked for more than 140 seconds. Not tainted 4.19.120-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D28120 7315 6250 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x792/0x1c20 kernel/sched/core.c:3515 schedule+0x7f/0x1b0 kernel/sched/core.c:3559 schedule_timeout+0x6d7/0xda0 kernel/time/timer.c:1782 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+0x282/0x460 kernel/sched/completion.c:136 crypto_wait_req include/linux/crypto.h:517 [inline] _aead_recvmsg crypto/algif_aead.c:313 [inline] aead_recvmsg+0x1182/0x1fb0 crypto/algif_aead.c:334 sock_recvmsg_nosec net/socket.c:795 [inline] sock_recvmsg+0xb9/0xf0 net/socket.c:802 sock_read_iter+0x252/0x430 net/socket.c:879 call_read_iter include/linux/fs.h:1815 [inline] do_iter_readv_writev+0x3f2/0x960 fs/read_write.c:679 do_iter_read+0x1db/0x580 fs/read_write.c:923 vfs_readv+0xc9/0x130 fs/read_write.c:987 do_readv+0x110/0x330 fs/read_write.c:1020 __do_sys_readv fs/read_write.c:1107 [inline] __se_sys_readv fs/read_write.c:1104 [inline] __x64_sys_readv+0x70/0xb0 fs/read_write.c:1104 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: 08 48 c7 44 24 10 04 00 00 00 e8 62 d8 fa ff 48 8b 44 24 18 48 8b 4c 24 30 48 83 c1 08 48 89 0c 24 48 89 44 24 08 48 c7 44 24 <10> 10 00 00 00 e8 3d d8 fa ff 48 8b 44 24 18 48 89 44 24 40 48 8b RSP: 002b:00007ff390490c78 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: 00007ff3904916d4 R13: 00000000004c5985 R14: 00000000004d9fe0 R15: 00000000ffffffff INFO: task syz-executor.3:7335 blocked for more than 140 seconds. Not tainted 4.19.120-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D27880 7335 6250 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x792/0x1c20 kernel/sched/core.c:3515 schedule+0x7f/0x1b0 kernel/sched/core.c:3559 schedule_timeout+0x6d7/0xda0 kernel/time/timer.c:1782 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+0x282/0x460 kernel/sched/completion.c:136 crypto_wait_req include/linux/crypto.h:517 [inline] _aead_recvmsg crypto/algif_aead.c:313 [inline] aead_recvmsg+0x1182/0x1fb0 crypto/algif_aead.c:334 sock_recvmsg_nosec net/socket.c:795 [inline] sock_recvmsg+0xb9/0xf0 net/socket.c:802 sock_read_iter+0x252/0x430 net/socket.c:879 call_read_iter include/linux/fs.h:1815 [inline] do_iter_readv_writev+0x3f2/0x960 fs/read_write.c:679 do_iter_read+0x1db/0x580 fs/read_write.c:923 vfs_readv+0xc9/0x130 fs/read_write.c:987 do_readv+0x110/0x330 fs/read_write.c:1020 __do_sys_readv fs/read_write.c:1107 [inline] __se_sys_readv fs/read_write.c:1104 [inline] __x64_sys_readv+0x70/0xb0 fs/read_write.c:1104 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: 08 48 c7 44 24 10 04 00 00 00 e8 62 d8 fa ff 48 8b 44 24 18 48 8b 4c 24 30 48 83 c1 08 48 89 0c 24 48 89 44 24 08 48 c7 44 24 <10> 10 00 00 00 e8 3d d8 fa ff 48 8b 44 24 18 48 89 44 24 40 48 8b RSP: 002b:00007ff39046fc78 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: 00007ff3904706d4 R13: 00000000004c5985 R14: 00000000004d9fe0 R15: 00000000ffffffff INFO: task syz-executor.4:7316 blocked for more than 140 seconds. Not tainted 4.19.120-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D28120 7316 6252 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x792/0x1c20 kernel/sched/core.c:3515 schedule+0x7f/0x1b0 kernel/sched/core.c:3559 schedule_timeout+0x6d7/0xda0 kernel/time/timer.c:1782 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+0x282/0x460 kernel/sched/completion.c:136 crypto_wait_req include/linux/crypto.h:517 [inline] _aead_recvmsg crypto/algif_aead.c:313 [inline] aead_recvmsg+0x1182/0x1fb0 crypto/algif_aead.c:334 sock_recvmsg_nosec net/socket.c:795 [inline] sock_recvmsg+0xb9/0xf0 net/socket.c:802 sock_read_iter+0x252/0x430 net/socket.c:879 call_read_iter include/linux/fs.h:1815 [inline] do_iter_readv_writev+0x3f2/0x960 fs/read_write.c:679 do_iter_read+0x1db/0x580 fs/read_write.c:923 vfs_readv+0xc9/0x130 fs/read_write.c:987 do_readv+0x110/0x330 fs/read_write.c:1020 __do_sys_readv fs/read_write.c:1107 [inline] __se_sys_readv fs/read_write.c:1104 [inline] __x64_sys_readv+0x70/0xb0 fs/read_write.c:1104 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: 08 48 c7 44 24 10 04 00 00 00 e8 62 d8 fa ff 48 8b 44 24 18 48 8b 4c 24 30 48 83 c1 08 48 89 0c 24 48 89 44 24 08 48 c7 44 24 <10> 10 00 00 00 e8 3d d8 fa ff 48 8b 44 24 18 48 89 44 24 40 48 8b RSP: 002b:00007f4845177c78 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: 00007f48451786d4 R13: 00000000004c5985 R14: 00000000004d9fe0 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1036: #0: 000000004596ad4b (rcu_read_lock){....}, at: debug_show_all_locks+0x5b/0x27a kernel/locking/lockdep.c:4442 1 lock held by in:imklog/5788: #0: 00000000846e943b (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xa7/0xd0 fs/file.c:767 1 lock held by syz-executor.5/7314: #0: 00000000162da67f (sk_lock-AF_ALG){+.+.}, at: lock_sock include/net/sock.h:1506 [inline] #0: 00000000162da67f (sk_lock-AF_ALG){+.+.}, at: af_alg_wait_for_data+0x1b3/0x440 crypto/af_alg.c:774 1 lock held by syz-executor.5/7326: #0: 000000005967c880 (sk_lock-AF_ALG){+.+.}, at: lock_sock include/net/sock.h:1506 [inline] #0: 000000005967c880 (sk_lock-AF_ALG){+.+.}, at: af_alg_wait_for_data+0x1b3/0x440 crypto/af_alg.c:774 1 lock held by syz-executor.1/7312: #0: 000000005c9f970d (sk_lock-AF_ALG){+.+.}, at: lock_sock include/net/sock.h:1506 [inline] #0: 000000005c9f970d (sk_lock-AF_ALG){+.+.}, at: af_alg_wait_for_data+0x1b3/0x440 crypto/af_alg.c:774 1 lock held by syz-executor.1/7321: #0: 0000000003d6a664 (sk_lock-AF_ALG){+.+.}, at: lock_sock include/net/sock.h:1506 [inline] #0: 0000000003d6a664 (sk_lock-AF_ALG){+.+.}, at: af_alg_wait_for_data+0x1b3/0x440 crypto/af_alg.c:774 1 lock held by syz-executor.2/7311: #0: 00000000d839b553 (sk_lock-AF_ALG){+.+.}, at: lock_sock include/net/sock.h:1506 [inline] #0: 00000000d839b553 (sk_lock-AF_ALG){+.+.}, at: af_alg_wait_for_data+0x1b3/0x440 crypto/af_alg.c:774 1 lock held by syz-executor.0/7313: #0: 00000000a17cdb19 (sk_lock-AF_ALG){+.+.}, at: lock_sock include/net/sock.h:1506 [inline] #0: 00000000a17cdb19 (sk_lock-AF_ALG){+.+.}, at: af_alg_wait_for_data+0x1b3/0x440 crypto/af_alg.c:774 1 lock held by syz-executor.0/7327: #0: 00000000a3701910 (sk_lock-AF_ALG){+.+.}, at: lock_sock include/net/sock.h:1506 [inline] #0: 00000000a3701910 (sk_lock-AF_ALG){+.+.}, at: af_alg_wait_for_data+0x1b3/0x440 crypto/af_alg.c:774 1 lock held by syz-executor.3/7315: #0: 00000000fb9ed873 (sk_lock-AF_ALG){+.+.}, at: lock_sock include/net/sock.h:1506 [inline] #0: 00000000fb9ed873 (sk_lock-AF_ALG){+.+.}, at: af_alg_wait_for_data+0x1b3/0x440 crypto/af_alg.c:774 1 lock held by syz-executor.3/7335: #0: 00000000d717a202 (sk_lock-AF_ALG){+.+.}, at: lock_sock include/net/sock.h:1506 [inline] #0: 00000000d717a202 (sk_lock-AF_ALG){+.+.}, at: af_alg_wait_for_data+0x1b3/0x440 crypto/af_alg.c:774 1 lock held by syz-executor.4/7316: #0: 000000006480f51b (sk_lock-AF_ALG){+.+.}, at: lock_sock include/net/sock.h:1506 [inline] #0: 000000006480f51b (sk_lock-AF_ALG){+.+.}, at: af_alg_wait_for_data+0x1b3/0x440 crypto/af_alg.c:774 1 lock held by syz-executor.4/7336: #0: 000000005c0d3905 (sk_lock-AF_ALG){+.+.}, at: lock_sock include/net/sock.h:1506 [inline] #0: 000000005c0d3905 (sk_lock-AF_ALG){+.+.}, at: af_alg_wait_for_data+0x1b3/0x440 crypto/af_alg.c:774 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1036 Comm: khungtaskd Not tainted 4.19.120-syzkaller #0 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+0x123/0x177 lib/dump_stack.c:118 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:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x5c3/0xb40 kernel/hung_task.c:287 kthread+0x327/0x3f0 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5789 Comm: rs:main Q:Reg Not tainted 4.19.120-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:ext4_mark_inode_dirty+0x1dd/0x770 fs/ext4/inode.c:6084 Code: b0 01 00 00 48 8b 95 f0 fe ff ff 4c 89 e6 4c 89 f7 e8 97 c8 ff ff 48 ba 00 00 00 00 00 fc ff df 48 01 d3 48 c7 03 00 00 00 00 <48> c7 43 08 00 00 00 00 48 c7 43 10 00 00 00 00 48 8b 75 d0 65 48 RSP: 0018:ffff8880853cf718 EFLAGS: 00000286 RAX: 0000000000000000 RBX: ffffed1010a79ee8 RCX: ffffffff81d2a14c RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffff88808ef13d80 RBP: ffff8880853cf848 R08: ffffed1011de27b1 R09: ffffed1011de27b0 R10: ffffed1011de27b0 R11: ffff88808ef13d83 R12: ffff888083ccb770 R13: ffff8880853cf820 R14: 0000000000000002 R15: 0000000000000020 FS: 00007f4bff120700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f212a96b000 CR3: 000000008a418000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ext4_dirty_inode+0x63/0x90 fs/ext4/inode.c:6130 __mark_inode_dirty+0x447/0xd80 fs/fs-writeback.c:2176 mark_inode_dirty include/linux/fs.h:2083 [inline] __generic_write_end+0x129/0x190 fs/buffer.c:2129 generic_write_end+0x46/0x70 fs/buffer.c:2174 ext4_da_write_end+0x2ba/0xa10 fs/ext4/inode.c:3193 generic_perform_write+0x349/0x490 mm/filemap.c:3173 __generic_file_write_iter+0x201/0x580 mm/filemap.c:3287 ext4_file_write_iter+0x282/0xe60 fs/ext4/file.c:272 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x44b/0x890 fs/read_write.c:487 vfs_write+0x150/0x4d0 fs/read_write.c:549 ksys_write+0x103/0x260 fs/read_write.c:599 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:608 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f4c01b641cd Code: c2 20 00 00 75 10 b8 01 00 00 00 0f 05 48 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 ae fc ff ff 48 89 04 24 b8 01 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 f7 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007f4bff11f590 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f4bf0027d40 RCX: 00007f4c01b641cd RDX: 00000000000004c6 RSI: 00007f4bf0027d40 RDI: 0000000000000009 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 00007f4bf0027ac0 R13: 00007f4bff11f5b0 R14: 000055e69acca7c0 R15: 00000000000004c6