bisecting fixing commit since c98875d930e915d01e8c40c7d3c16f00b3c8abe1 building syzkaller on 53199d6e8aee5f0ebd3775d2b1c674f4e6e64e2b testing commit c98875d930e915d01e8c40c7d3c16f00b3c8abe1 with gcc (GCC) 8.1.0 kernel signature: 7d665ffd6ace03ded408e3274e4cf34a7445357befb460e6a370ad5eb5b87732 all runs: crashed: INFO: task hung in aead_recvmsg testing current HEAD 10ad6cfd57360760116cde00a8ef756e121367a9 testing commit 10ad6cfd57360760116cde00a8ef756e121367a9 with gcc (GCC) 8.1.0 kernel signature: 87aad71743b9326fb21cffd505ac51ce842c15e9f280a36b90eafd0882c38092 all runs: crashed: INFO: task hung in aead_recvmsg revisions tested: 2, total time: 29m54.097152566s (build: 17m32.637011945s, test: 11m24.224523662s) the crash still happens on HEAD commit msg: Linux 4.19.148 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.0:7207 blocked for more than 140 seconds. Not tainted 4.19.148-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28584 7207 6235 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x792/0x1c20 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 schedule_timeout+0x6e3/0xe00 kernel/time/timer.c:1801 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: 0033:0x458ca9 Code: 48 83 ec 20 48 89 6c 24 18 48 8d 6c 24 18 83 3d 34 33 ff 00 00 76 2e 48 8d 05 e3 bd 29 00 48 8b 0d c4 8e fc 00 48 89 0c 24 48 <8b> 4c 24 28 48 89 4c 24 08 48 8b 08 48 89 c2 ff d1 48 8b 6c 24 18 RSP: 002b:00007f2594b2cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458ca9 RDX: 0000000000000001 RSI: 00000000200007c0 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2594b2d6d4 R13: 00000000004c5a05 R14: 00000000004da060 R15: 00000000ffffffff INFO: task syz-executor.0:7213 blocked for more than 140 seconds. Not tainted 4.19.148-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28120 7213 6235 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x792/0x1c20 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 schedule_timeout+0x6e3/0xe00 kernel/time/timer.c:1801 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: 0033:0x458ca9 Code: 48 83 ec 20 48 89 6c 24 18 48 8d 6c 24 18 83 3d 34 33 ff 00 00 76 2e 48 8d 05 e3 bd 29 00 48 8b 0d c4 8e fc 00 48 89 0c 24 48 <8b> 4c 24 28 48 89 4c 24 08 48 8b 08 48 89 c2 ff d1 48 8b 6c 24 18 RSP: 002b:00007f2594b0bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458ca9 RDX: 0000000000000001 RSI: 00000000200007c0 RDI: 0000000000000004 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2594b0c6d4 R13: 00000000004c5a05 R14: 00000000004da060 R15: 00000000ffffffff INFO: task syz-executor.3:7211 blocked for more than 140 seconds. Not tainted 4.19.148-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D28584 7211 6239 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x792/0x1c20 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 schedule_timeout+0x6e3/0xe00 kernel/time/timer.c:1801 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: 0033:0x458ca9 Code: 48 83 ec 20 48 89 6c 24 18 48 8d 6c 24 18 83 3d 34 33 ff 00 00 76 2e 48 8d 05 e3 bd 29 00 48 8b 0d c4 8e fc 00 48 89 0c 24 48 <8b> 4c 24 28 48 89 4c 24 08 48 8b 08 48 89 c2 ff d1 48 8b 6c 24 18 RSP: 002b:00007fe44d8e0c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458ca9 RDX: 0000000000000001 RSI: 00000000200007c0 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe44d8e16d4 R13: 00000000004c5a05 R14: 00000000004da060 R15: 00000000ffffffff INFO: task syz-executor.3:7218 blocked for more than 140 seconds. Not tainted 4.19.148-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D27880 7218 6239 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x792/0x1c20 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 schedule_timeout+0x6e3/0xe00 kernel/time/timer.c:1801 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: 0033:0x458ca9 Code: 48 83 ec 20 48 89 6c 24 18 48 8d 6c 24 18 83 3d 34 33 ff 00 00 76 2e 48 8d 05 e3 bd 29 00 48 8b 0d c4 8e fc 00 48 89 0c 24 48 <8b> 4c 24 28 48 89 4c 24 08 48 8b 08 48 89 c2 ff d1 48 8b 6c 24 18 RSP: 002b:00007fe44d8bfc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458ca9 RDX: 0000000000000001 RSI: 00000000200007c0 RDI: 0000000000000004 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe44d8c06d4 R13: 00000000004c5a05 R14: 00000000004da060 R15: 00000000ffffffff INFO: task syz-executor.1:7225 blocked for more than 140 seconds. Not tainted 4.19.148-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28344 7225 6246 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x792/0x1c20 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 schedule_timeout+0x6e3/0xe00 kernel/time/timer.c:1801 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: 0033:0x458ca9 Code: 48 83 ec 20 48 89 6c 24 18 48 8d 6c 24 18 83 3d 34 33 ff 00 00 76 2e 48 8d 05 e3 bd 29 00 48 8b 0d c4 8e fc 00 48 89 0c 24 48 <8b> 4c 24 28 48 89 4c 24 08 48 8b 08 48 89 c2 ff d1 48 8b 6c 24 18 RSP: 002b:00007fdb1be91c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458ca9 RDX: 0000000000000001 RSI: 00000000200007c0 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fdb1be926d4 R13: 00000000004c5a05 R14: 00000000004da060 R15: 00000000ffffffff INFO: task syz-executor.1:7228 blocked for more than 140 seconds. Not tainted 4.19.148-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D27880 7228 6246 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x792/0x1c20 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 schedule_timeout+0x6e3/0xe00 kernel/time/timer.c:1801 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: 0033:0x458ca9 Code: 48 83 ec 20 48 89 6c 24 18 48 8d 6c 24 18 83 3d 34 33 ff 00 00 76 2e 48 8d 05 e3 bd 29 00 48 8b 0d c4 8e fc 00 48 89 0c 24 48 <8b> 4c 24 28 48 89 4c 24 08 48 8b 08 48 89 c2 ff d1 48 8b 6c 24 18 RSP: 002b:00007fdb1be70c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458ca9 RDX: 0000000000000001 RSI: 00000000200007c0 RDI: 0000000000000004 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fdb1be716d4 R13: 00000000004c5a05 R14: 00000000004da060 R15: 00000000ffffffff INFO: task syz-executor.4:7247 blocked for more than 140 seconds. Not tainted 4.19.148-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D28120 7247 6237 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x792/0x1c20 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 schedule_timeout+0x6e3/0xe00 kernel/time/timer.c:1801 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: 0033:0x458ca9 Code: 48 83 ec 20 48 89 6c 24 18 48 8d 6c 24 18 83 3d 34 33 ff 00 00 76 2e 48 8d 05 e3 bd 29 00 48 8b 0d c4 8e fc 00 48 89 0c 24 48 <8b> 4c 24 28 48 89 4c 24 08 48 8b 08 48 89 c2 ff d1 48 8b 6c 24 18 RSP: 002b:00007f2b3609ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458ca9 RDX: 0000000000000001 RSI: 00000000200007c0 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2b3609b6d4 R13: 00000000004c5a05 R14: 00000000004da060 R15: 00000000ffffffff INFO: task syz-executor.4:7256 blocked for more than 140 seconds. Not tainted 4.19.148-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D27880 7256 6237 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x792/0x1c20 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 schedule_timeout+0x6e3/0xe00 kernel/time/timer.c:1801 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: 0033:0x458ca9 Code: 48 83 ec 20 48 89 6c 24 18 48 8d 6c 24 18 83 3d 34 33 ff 00 00 76 2e 48 8d 05 e3 bd 29 00 48 8b 0d c4 8e fc 00 48 89 0c 24 48 <8b> 4c 24 28 48 89 4c 24 08 48 8b 08 48 89 c2 ff d1 48 8b 6c 24 18 RSP: 002b:00007f2b36079c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458ca9 RDX: 0000000000000001 RSI: 00000000200007c0 RDI: 0000000000000004 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2b3607a6d4 R13: 00000000004c5a05 R14: 00000000004da060 R15: 00000000ffffffff INFO: task syz-executor.5:7250 blocked for more than 140 seconds. Not tainted 4.19.148-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28120 7250 6242 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x792/0x1c20 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 schedule_timeout+0x6e3/0xe00 kernel/time/timer.c:1801 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: 0033:0x458ca9 Code: 48 83 ec 20 48 89 6c 24 18 48 8d 6c 24 18 83 3d 34 33 ff 00 00 76 2e 48 8d 05 e3 bd 29 00 48 8b 0d c4 8e fc 00 48 89 0c 24 48 <8b> 4c 24 28 48 89 4c 24 08 48 8b 08 48 89 c2 ff d1 48 8b 6c 24 18 RSP: 002b:00007fe92e642c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458ca9 RDX: 0000000000000001 RSI: 00000000200007c0 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe92e6436d4 R13: 00000000004c5a05 R14: 00000000004da060 R15: 00000000ffffffff INFO: task syz-executor.2:7252 blocked for more than 140 seconds. Not tainted 4.19.148-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28120 7252 6252 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x792/0x1c20 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 schedule_timeout+0x6e3/0xe00 kernel/time/timer.c:1801 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: 0033:0x458ca9 Code: 48 83 ec 20 48 89 6c 24 18 48 8d 6c 24 18 83 3d 34 33 ff 00 00 76 2e 48 8d 05 e3 bd 29 00 48 8b 0d c4 8e fc 00 48 89 0c 24 48 <8b> 4c 24 28 48 89 4c 24 08 48 8b 08 48 89 c2 ff d1 48 8b 6c 24 18 RSP: 002b:00007fd21b72dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458ca9 RDX: 0000000000000001 RSI: 00000000200007c0 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd21b72e6d4 R13: 00000000004c5a05 R14: 00000000004da060 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1023: #0: 000000004a71840a (rcu_read_lock){....}, at: debug_show_all_locks+0x5b/0x27a kernel/locking/lockdep.c:4442 1 lock held by syz-executor.0/7207: #0: 00000000095fe02e (sk_lock-AF_ALG){+.+.}, at: lock_sock include/net/sock.h:1510 [inline] #0: 00000000095fe02e (sk_lock-AF_ALG){+.+.}, at: af_alg_wait_for_data+0x1b3/0x440 crypto/af_alg.c:770 1 lock held by syz-executor.0/7213: #0: 000000000073b16a (sk_lock-AF_ALG){+.+.}, at: lock_sock include/net/sock.h:1510 [inline] #0: 000000000073b16a (sk_lock-AF_ALG){+.+.}, at: af_alg_wait_for_data+0x1b3/0x440 crypto/af_alg.c:770 1 lock held by syz-executor.3/7211: #0: 000000004e0b08e7 (sk_lock-AF_ALG){+.+.}, at: lock_sock include/net/sock.h:1510 [inline] #0: 000000004e0b08e7 (sk_lock-AF_ALG){+.+.}, at: af_alg_wait_for_data+0x1b3/0x440 crypto/af_alg.c:770 1 lock held by syz-executor.3/7218: #0: 00000000f7b5d371 (sk_lock-AF_ALG){+.+.}, at: lock_sock include/net/sock.h:1510 [inline] #0: 00000000f7b5d371 (sk_lock-AF_ALG){+.+.}, at: af_alg_wait_for_data+0x1b3/0x440 crypto/af_alg.c:770 1 lock held by syz-executor.1/7225: #0: 00000000836e5e2e (sk_lock-AF_ALG){+.+.}, at: lock_sock include/net/sock.h:1510 [inline] #0: 00000000836e5e2e (sk_lock-AF_ALG){+.+.}, at: af_alg_wait_for_data+0x1b3/0x440 crypto/af_alg.c:770 1 lock held by syz-executor.1/7228: #0: 00000000761ef238 (sk_lock-AF_ALG){+.+.}, at: lock_sock include/net/sock.h:1510 [inline] #0: 00000000761ef238 (sk_lock-AF_ALG){+.+.}, at: af_alg_wait_for_data+0x1b3/0x440 crypto/af_alg.c:770 1 lock held by syz-executor.4/7247: #0: 000000007327d673 (sk_lock-AF_ALG){+.+.}, at: lock_sock include/net/sock.h:1510 [inline] #0: 000000007327d673 (sk_lock-AF_ALG){+.+.}, at: af_alg_wait_for_data+0x1b3/0x440 crypto/af_alg.c:770 1 lock held by syz-executor.4/7256: #0: 0000000048e9407c (sk_lock-AF_ALG){+.+.}, at: lock_sock include/net/sock.h:1510 [inline] #0: 0000000048e9407c (sk_lock-AF_ALG){+.+.}, at: af_alg_wait_for_data+0x1b3/0x440 crypto/af_alg.c:770 1 lock held by syz-executor.5/7250: #0: 000000006fd4f311 (sk_lock-AF_ALG){+.+.}, at: lock_sock include/net/sock.h:1510 [inline] #0: 000000006fd4f311 (sk_lock-AF_ALG){+.+.}, at: af_alg_wait_for_data+0x1b3/0x440 crypto/af_alg.c:770 1 lock held by syz-executor.2/7252: #0: 000000002846d066 (sk_lock-AF_ALG){+.+.}, at: lock_sock include/net/sock.h:1510 [inline] #0: 000000002846d066 (sk_lock-AF_ALG){+.+.}, at: af_alg_wait_for_data+0x1b3/0x440 crypto/af_alg.c:770 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1023 Comm: khungtaskd Not tainted 4.19.148-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+0x34a/0x410 kernel/kthread.c:259 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: 3520 Comm: systemd-journal Not tainted 4.19.148-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:debug_lockdep_rcu_enabled+0x6e/0x90 kernel/rcu/update.c:253 Code: 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 1c 8b 05 d2 d7 fc 06 <85> c0 74 07 e8 29 ff ff ff 5d c3 31 c0 5d c3 e8 fe f3 40 00 eb ad RSP: 0018:ffff8880949475d8 EFLAGS: 00000097 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000004 RSI: 0000000000000000 RDI: ffffffff884f0440 RBP: ffff8880949475d8 R08: 0000000000000000 R09: 0000000000000000 R10: ffffed1015d44732 R11: ffff8880aea23993 R12: 0000000000000000 R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fecb1f1b8c0(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fecaf30b000 CR3: 0000000094a67000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: trace_lock_acquire include/trace/events/lock.h:13 [inline] lock_acquire+0x2f6/0x3d0 kernel/locking/lockdep.c:3906 rcu_lock_acquire include/linux/rcupdate.h:242 [inline] rcu_read_lock include/linux/rcupdate.h:627 [inline] is_bpf_text_address+0x2d/0xe0 kernel/bpf/core.c:545 kernel_text_address+0x79/0xf0 kernel/extable.c:152 __kernel_text_address+0xd/0x40 kernel/extable.c:107 unwind_get_return_address+0x61/0xa0 arch/x86/kernel/unwind_frame.c:18 __save_stack_trace+0x9c/0x100 arch/x86/kernel/stacktrace.c:45 save_stack_trace+0x1a/0x20 arch/x86/kernel/stacktrace.c:60 save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:553 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:490 kmem_cache_alloc+0x12e/0x730 mm/slab.c:3559 kmem_cache_zalloc include/linux/slab.h:699 [inline] file_alloc_security security/selinux/hooks.c:390 [inline] selinux_file_alloc_security+0xb7/0x1a0 security/selinux/hooks.c:3600 security_file_alloc+0x40/0x80 security/security.c:880 __alloc_file+0xbf/0x2f0 fs/file_table.c:105 alloc_empty_file+0x45/0x110 fs/file_table.c:150 path_openat+0x106/0x3c60 fs/namei.c:3526 do_filp_open+0x177/0x250 fs/namei.c:3567 do_sys_open+0x1dd/0x350 fs/open.c:1085 __do_sys_open fs/open.c:1103 [inline] __se_sys_open fs/open.c:1098 [inline] __x64_sys_open+0x79/0xb0 fs/open.c:1098 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fecb14ab840 Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 RSP: 002b:00007fff85fb7348 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007fff85fb7650 RCX: 00007fecb14ab840 RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000055d5bfffcfb0 RBP: 000000000000000d R08: 00000000000001e0 R09: 00000000ffffffff R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff R13: 000055d5bffef060 R14: 00007fff85fb7610 R15: 000055d5bfffaa80