INFO: task kworker/u4:2:13785 blocked for more than 430 seconds. Not tainted 6.8.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:2 state:D stack:0 pid:13785 tgid:13785 ppid:2 flags:0x00000000 Workqueue: nfc2_nci_rx_wq nci_rx_work Backtrace: [<8185964c>] (__schedule) from [<8185a284>] (__schedule_loop kernel/sched/core.c:6802 [inline]) [<8185964c>] (__schedule) from [<8185a284>] (schedule+0x2c/0xb8 kernel/sched/core.c:6817) r10:84683205 r9:00000000 r8:85196060 r7:00000002 r6:eb1a9dac r5:83641800 r4:83641800 [<8185a258>] (schedule) from [<8185a850>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:6874) r5:83641800 r4:8519605c [<8185a838>] (schedule_preempt_disabled) from [<8185d138>] (__mutex_lock_common kernel/locking/mutex.c:684 [inline]) [<8185a838>] (schedule_preempt_disabled) from [<8185d138>] (__mutex_lock.constprop.0+0x2e8/0xae0 kernel/locking/mutex.c:752) [<8185ce50>] (__mutex_lock.constprop.0) from [<8185da04>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1040) r10:84683205 r9:83641800 r8:00000001 r7:8519605c r6:00000000 r5:85a710fc r4:85196000 [<8185d9f0>] (__mutex_lock_slowpath) from [<8185da44>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:286) [<8185da08>] (mutex_lock) from [<817ad6a0>] (device_lock include/linux/device.h:990 [inline]) [<8185da08>] (mutex_lock) from [<817ad6a0>] (nfc_targets_found+0x5c/0x124 net/nfc/core.c:778) [<817ad644>] (nfc_targets_found) from [<817bdb9c>] (nci_rf_discover_ntf_packet net/nfc/nci/ntf.c:390 [inline]) [<817ad644>] (nfc_targets_found) from [<817bdb9c>] (nci_ntf_packet+0xa3c/0xe88 net/nfc/nci/ntf.c:798) r8:00000001 r7:00000000 r6:85a71000 r5:858d7a80 r4:00000103 [<817bd160>] (nci_ntf_packet) from [<817ba8e4>] (nci_rx_work+0x64/0xe4 net/nfc/nci/core.c:1526) r10:84683205 r9:83641800 r8:00000100 r7:85a710a4 r6:85a71070 r5:85a71000 r4:858d7a80 [<817ba880>] (nci_rx_work) from [<80267028>] (process_one_work+0x19c/0x4a4 kernel/workqueue.c:2633) r7:82c0e400 r6:84683200 r5:85a71070 r4:85899f00 [<80266e8c>] (process_one_work) from [<80267570>] (process_scheduled_works kernel/workqueue.c:2706 [inline]) [<80266e8c>] (process_one_work) from [<80267570>] (worker_thread+0x240/0x48c kernel/workqueue.c:2787) r10:61c88647 r9:83641800 r8:82c0e420 r7:82604d40 r6:82c0e400 r5:85899f2c r4:85899f00 [<80267330>] (worker_thread) from [<8026e84c>] (kthread+0x104/0x134 kernel/kthread.c:388) r10:00000000 r9:df845e90 r8:858852c0 r7:85899f00 r6:80267330 r5:83641800 r4:85863040 [<8026e748>] (kthread) from [<80200104>] (ret_from_fork+0x14/0x30 arch/arm/kernel/entry-common.S:134) Exception stack(0xeb1a9fb0 to 0xeb1a9ff8) 9fa0: 00000000 00000000 00000000 00000000 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:8026e748 r4:85863040 INFO: task syz-executor.0:14193 blocked for more than 430 seconds. Not tainted 6.8.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:0 pid:14193 tgid:14177 ppid:2988 flags:0x00000005 Backtrace: [<8185964c>] (__schedule) from [<8185a284>] (__schedule_loop kernel/sched/core.c:6802 [inline]) [<8185964c>] (__schedule) from [<8185a284>] (schedule+0x2c/0xb8 kernel/sched/core.c:6817) r10:828f71c0 r9:00000000 r8:85a710c8 r7:00000002 r6:ecaf1a8c r5:83690000 r4:83690000 [<8185a258>] (schedule) from [<8185a850>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:6874) r5:83690000 r4:85a710c4 [<8185a838>] (schedule_preempt_disabled) from [<8185d138>] (__mutex_lock_common kernel/locking/mutex.c:684 [inline]) [<8185a838>] (schedule_preempt_disabled) from [<8185d138>] (__mutex_lock.constprop.0+0x2e8/0xae0 kernel/locking/mutex.c:752) [<8185ce50>] (__mutex_lock.constprop.0) from [<8185da04>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1040) r10:828f71c0 r9:85a710c4 r8:85196000 r7:ffffffff r6:00000000 r5:00000000 r4:85a71000 [<8185d9f0>] (__mutex_lock_slowpath) from [<8185da44>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:286) [<8185da08>] (mutex_lock) from [<817bbf64>] (nci_request net/nfc/nci/core.c:149 [inline]) [<8185da08>] (mutex_lock) from [<817bbf64>] (nci_start_poll+0x108/0x394 net/nfc/nci/core.c:831) [<817bbe5c>] (nci_start_poll) from [<817ae5dc>] (nfc_start_poll+0x74/0xd8 net/nfc/core.c:225) r10:828f71c0 r9:ecaf1c4c r8:ffffffff r7:8519605c r6:00000000 r5:ffffffff r4:85196000 [<817ae568>] (nfc_start_poll) from [<817af8a8>] (nfc_genl_start_poll+0x70/0xfc net/nfc/netlink.c:828) r7:85196210 r6:ecaf1bec r5:00000000 r4:85196000 [<817af838>] (nfc_genl_start_poll) from [<81465e1c>] (genl_family_rcv_msg_doit net/netlink/genetlink.c:1113 [inline]) [<817af838>] (nfc_genl_start_poll) from [<81465e1c>] (genl_family_rcv_msg net/netlink/genetlink.c:1193 [inline]) [<817af838>] (nfc_genl_start_poll) from [<81465e1c>] (genl_rcv_msg+0x280/0x3d4 net/netlink/genetlink.c:1208) r9:ecaf1c4c r8:85899a80 r7:00000000 r6:858d7780 r5:85126490 r4:821954c0 [<81465b9c>] (genl_rcv_msg) from [<81464458>] (netlink_rcv_skb+0xc0/0x120 net/netlink/af_netlink.c:2543) r10:00000000 r9:8519497c r8:828f71c0 r7:00000024 r6:85126480 r5:81465b9c r4:858d7780 [<81464398>] (netlink_rcv_skb) from [<81465580>] (genl_rcv+0x2c/0x3c net/netlink/genetlink.c:1217) r7:858d7780 r6:82f23500 r5:827c45c0 r4:858d7780 [<81465554>] (genl_rcv) from [<81463990>] (netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline]) [<81465554>] (genl_rcv) from [<81463990>] (netlink_unicast+0x194/0x290 net/netlink/af_netlink.c:1367) r5:00000024 r4:82e08400 [<814637fc>] (netlink_unicast) from [<81463c68>] (netlink_sendmsg+0x1dc/0x434 net/netlink/af_netlink.c:1908) r9:00000000 r8:00000000 r7:85194800 r6:00000024 r5:858d7780 r4:ecaf1f38 [<81463a8c>] (netlink_sendmsg) from [<8134ca38>] (sock_sendmsg_nosec net/socket.c:730 [inline]) [<81463a8c>] (netlink_sendmsg) from [<8134ca38>] (__sock_sendmsg+0x44/0x78 net/socket.c:745) r10:00000000 r9:ecaf1dd4 r8:ecaf1dd4 r7:00000000 r6:84992280 r5:ecaf1f38 r4:00000000 [<8134c9f4>] (__sock_sendmsg) from [<8134d8e4>] (____sys_sendmsg+0x22c/0x2a8 net/socket.c:2584) r7:00000000 r6:00000000 r5:84992280 r4:ecaf1f38 [<8134d6b8>] (____sys_sendmsg) from [<8134f640>] (___sys_sendmsg+0x9c/0xd0 net/socket.c:2638) r10:ecaf1e34 r9:20000440 r8:00000000 r7:00000000 r6:84992280 r5:ecaf1f38 r4:00000000 [<8134f5a4>] (___sys_sendmsg) from [<8134fb3c>] (__sys_sendmsg net/socket.c:2667 [inline]) [<8134f5a4>] (___sys_sendmsg) from [<8134fb3c>] (__do_sys_sendmsg net/socket.c:2676 [inline]) [<8134f5a4>] (___sys_sendmsg) from [<8134fb3c>] (sys_sendmsg+0x78/0xbc net/socket.c:2674) r10:00000128 r9:83690000 r8:80200288 r7:00000000 r6:20000440 r5:84992280 r4:00000000 [<8134fac4>] (sys_sendmsg) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66) Exception stack(0xecaf1fa8 to 0xecaf1ff0) 1fa0: 00000000 00000000 00000005 20000440 00000000 00000000 1fc0: 00000000 00000000 0014c3e8 00000128 7e8b532e 7e8b532f 003d0f00 76b2d0fc 1fe0: 76b2cf08 76b2cef8 000167e8 00050bb0 r7:00000128 r6:0014c3e8 r5:00000000 r4:00000000 INFO: task syz-executor.0:14206 blocked for more than 430 seconds. Not tainted 6.8.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:0 pid:14206 tgid:14177 ppid:2988 flags:0x00000005 Backtrace: [<8185964c>] (__schedule) from [<8185a284>] (__schedule_loop kernel/sched/core.c:6802 [inline]) [<8185964c>] (__schedule) from [<8185a284>] (schedule+0x2c/0xb8 kernel/sched/core.c:6817) r10:00000000 r9:00000000 r8:827c45b0 r7:00000002 r6:ecaedb2c r5:83e19800 r4:83e19800 [<8185a258>] (schedule) from [<8185a850>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:6874) r5:83e19800 r4:827c45ac [<8185a838>] (schedule_preempt_disabled) from [<8185d138>] (__mutex_lock_common kernel/locking/mutex.c:684 [inline]) [<8185a838>] (schedule_preempt_disabled) from [<8185d138>] (__mutex_lock.constprop.0+0x2e8/0xae0 kernel/locking/mutex.c:752) [<8185ce50>] (__mutex_lock.constprop.0) from [<8185da04>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1040) r10:00000000 r9:ecaedc4c r8:00000000 r7:0000002c r6:858d79c0 r5:851278c0 r4:821954c0 [<8185d9f0>] (__mutex_lock_slowpath) from [<8185da44>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:286) [<8185da08>] (mutex_lock) from [<81465ea4>] (genl_lock net/netlink/genetlink.c:33 [inline]) [<8185da08>] (mutex_lock) from [<81465ea4>] (genl_op_lock net/netlink/genetlink.c:58 [inline]) [<8185da08>] (mutex_lock) from [<81465ea4>] (genl_op_lock net/netlink/genetlink.c:55 [inline]) [<8185da08>] (mutex_lock) from [<81465ea4>] (genl_rcv_msg+0x308/0x3d4 net/netlink/genetlink.c:1207) [<81465b9c>] (genl_rcv_msg) from [<81464458>] (netlink_rcv_skb+0xc0/0x120 net/netlink/af_netlink.c:2543) r10:00000000 r9:8519497c r8:828f71c0 r7:0000002c r6:851278c0 r5:81465b9c r4:858d79c0 [<81464398>] (netlink_rcv_skb) from [<81465580>] (genl_rcv+0x2c/0x3c net/netlink/genetlink.c:1217) r7:858d79c0 r6:82f23500 r5:827c45c0 r4:858d79c0 [<81465554>] (genl_rcv) from [<81463990>] (netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline]) [<81465554>] (genl_rcv) from [<81463990>] (netlink_unicast+0x194/0x290 net/netlink/af_netlink.c:1367) r5:0000002c r4:82e08400 [<814637fc>] (netlink_unicast) from [<81463c68>] (netlink_sendmsg+0x1dc/0x434 net/netlink/af_netlink.c:1908) r9:00000000 r8:00000000 r7:85194800 r6:0000002c r5:858d79c0 r4:ecaedf38 [<81463a8c>] (netlink_sendmsg) from [<8134ca38>] (sock_sendmsg_nosec net/socket.c:730 [inline]) [<81463a8c>] (netlink_sendmsg) from [<8134ca38>] (__sock_sendmsg+0x44/0x78 net/socket.c:745) r10:00000000 r9:ecaeddd4 r8:ecaeddd4 r7:00000000 r6:84992280 r5:ecaedf38 r4:00000000 [<8134c9f4>] (__sock_sendmsg) from [<8134d8e4>] (____sys_sendmsg+0x22c/0x2a8 net/socket.c:2584) r7:00000000 r6:00000000 r5:84992280 r4:ecaedf38 [<8134d6b8>] (____sys_sendmsg) from [<8134f640>] (___sys_sendmsg+0x9c/0xd0 net/socket.c:2638) r10:ecaede34 r9:20000780 r8:00000000 r7:00000000 r6:84992280 r5:ecaedf38 r4:00000000 [<8134f5a4>] (___sys_sendmsg) from [<8134fb3c>] (__sys_sendmsg net/socket.c:2667 [inline]) [<8134f5a4>] (___sys_sendmsg) from [<8134fb3c>] (__do_sys_sendmsg net/socket.c:2676 [inline]) [<8134f5a4>] (___sys_sendmsg) from [<8134fb3c>] (sys_sendmsg+0x78/0xbc net/socket.c:2674) r10:00000128 r9:83e19800 r8:80200288 r7:00000000 r6:20000780 r5:84992280 r4:00000000 [<8134fac4>] (sys_sendmsg) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66) Exception stack(0xecaedfa8 to 0xecaedff0) dfa0: 00000000 00000000 00000005 20000780 00000000 00000000 dfc0: 00000000 00000000 0014c598 00000128 7e8b532e 7e8b532f 003d0f00 76aca0fc dfe0: 76ac9f08 76ac9ef8 000167e8 00050bb0 r7:00000128 r6:0014c598 r5:00000000 r4:00000000 INFO: task syz-executor.0:14210 blocked for more than 430 seconds. Not tainted 6.8.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:0 pid:14210 tgid:14177 ppid:2988 flags:0x00000005 Backtrace: [<8185964c>] (__schedule) from [<8185a284>] (__schedule_loop kernel/sched/core.c:6802 [inline]) [<8185964c>] (__schedule) from [<8185a284>] (schedule+0x2c/0xb8 kernel/sched/core.c:6817) r10:00000000 r9:00000000 r8:827c45b0 r7:00000002 r6:ecc19b2c r5:83642400 r4:83642400 [<8185a258>] (schedule) from [<8185a850>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:6874) r5:83642400 r4:827c45ac [<8185a838>] (schedule_preempt_disabled) from [<8185d138>] (__mutex_lock_common kernel/locking/mutex.c:684 [inline]) [<8185a838>] (schedule_preempt_disabled) from [<8185d138>] (__mutex_lock.constprop.0+0x2e8/0xae0 kernel/locking/mutex.c:752) [<8185ce50>] (__mutex_lock.constprop.0) from [<8185da04>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1040) r10:00000000 r9:ecc19c4c r8:00000000 r7:0000002c r6:858d7b40 r5:85127680 r4:821954c0 [<8185d9f0>] (__mutex_lock_slowpath) from [<8185da44>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:286) [<8185da08>] (mutex_lock) from [<81465ea4>] (genl_lock net/netlink/genetlink.c:33 [inline]) [<8185da08>] (mutex_lock) from [<81465ea4>] (genl_op_lock net/netlink/genetlink.c:58 [inline]) [<8185da08>] (mutex_lock) from [<81465ea4>] (genl_op_lock net/netlink/genetlink.c:55 [inline]) [<8185da08>] (mutex_lock) from [<81465ea4>] (genl_rcv_msg+0x308/0x3d4 net/netlink/genetlink.c:1207) [<81465b9c>] (genl_rcv_msg) from [<81464458>] (netlink_rcv_skb+0xc0/0x120 net/netlink/af_netlink.c:2543) r10:00000000 r9:8519497c r8:828f71c0 r7:0000002c r6:85127680 r5:81465b9c r4:858d7b40 [<81464398>] (netlink_rcv_skb) from [<81465580>] (genl_rcv+0x2c/0x3c net/netlink/genetlink.c:1217) r7:858d7b40 r6:82f23500 r5:827c45c0 r4:858d7b40 [<81465554>] (genl_rcv) from [<81463990>] (netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline]) [<81465554>] (genl_rcv) from [<81463990>] (netlink_unicast+0x194/0x290 net/netlink/af_netlink.c:1367) r5:0000002c r4:82e08400 [<814637fc>] (netlink_unicast) from [<81463c68>] (netlink_sendmsg+0x1dc/0x434 net/netlink/af_netlink.c:1908) r9:00000000 r8:00000000 r7:85194800 r6:0000002c r5:858d7b40 r4:ecc19f38 [<81463a8c>] (netlink_sendmsg) from [<8134ca38>] (sock_sendmsg_nosec net/socket.c:730 [inline]) [<81463a8c>] (netlink_sendmsg) from [<8134ca38>] (__sock_sendmsg+0x44/0x78 net/socket.c:745) r10:00000000 r9:ecc19dd4 r8:ecc19dd4 r7:00000000 r6:84992280 r5:ecc19f38 r4:00000000 [<8134c9f4>] (__sock_sendmsg) from [<8134d8e4>] (____sys_sendmsg+0x22c/0x2a8 net/socket.c:2584) r7:00000000 r6:00000000 r5:84992280 r4:ecc19f38 [<8134d6b8>] (____sys_sendmsg) from [<8134f640>] (___sys_sendmsg+0x9c/0xd0 net/socket.c:2638) r10:ecc19e34 r9:20000780 r8:00000000 r7:00000000 r6:84992280 r5:ecc19f38 r4:00000000 [<8134f5a4>] (___sys_sendmsg) from [<8134fb3c>] (__sys_sendmsg net/socket.c:2667 [inline]) [<8134f5a4>] (___sys_sendmsg) from [<8134fb3c>] (__do_sys_sendmsg net/socket.c:2676 [inline]) [<8134f5a4>] (___sys_sendmsg) from [<8134fb3c>] (sys_sendmsg+0x78/0xbc net/socket.c:2674) r10:00000128 r9:83642400 r8:80200288 r7:00000000 r6:20000780 r5:84992280 r4:00000000 [<8134fac4>] (sys_sendmsg) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66) Exception stack(0xecc19fa8 to 0xecc19ff0) 9fa0: 00000000 00000000 00000005 20000780 00000000 00000000 9fc0: 00000000 00000000 0014c6b8 00000128 7e8b532e 7e8b532f 003d0f00 76a880fc 9fe0: 76a87f08 76a87ef8 000167e8 00050bb0 r7:00000128 r6:0014c6b8 r5:00000000 r4:00000000 INFO: task syz-executor.0:14214 blocked for more than 430 seconds. Not tainted 6.8.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:0 pid:14214 tgid:14177 ppid:2988 flags:0x00000005 Backtrace: [<8185964c>] (__schedule) from [<8185a284>] (__schedule_loop kernel/sched/core.c:6802 [inline]) [<8185964c>] (__schedule) from [<8185a284>] (schedule+0x2c/0xb8 kernel/sched/core.c:6817) r10:ecc49e3c r9:00000002 r8:ecc49de4 r7:83e1b000 r6:ecc49e34 r5:00000000 r4:83e1b000 [<8185a258>] (schedule) from [<8186182c>] (schedule_timeout+0xe4/0x114 kernel/time/timer.c:2159) r5:00000000 r4:7fffffff [<81861748>] (schedule_timeout) from [<8185b188>] (do_wait_for_common kernel/sched/completion.c:95 [inline]) [<81861748>] (schedule_timeout) from [<8185b188>] (__wait_for_common kernel/sched/completion.c:116 [inline]) [<81861748>] (schedule_timeout) from [<8185b188>] (wait_for_common kernel/sched/completion.c:127 [inline]) [<81861748>] (schedule_timeout) from [<8185b188>] (wait_for_completion+0x6c/0x144 kernel/sched/completion.c:148) r7:83e1b000 r6:ecc49e34 r5:ecc49e38 r4:7fffffff [<8185b11c>] (wait_for_completion) from [<8026375c>] (__flush_workqueue+0x118/0x5d0 kernel/workqueue.c:3198) r10:00000003 r9:84f1d410 r8:84f1d43c r7:85a71030 r6:84f1d400 r5:ecc49e28 r4:00000001 [<80263644>] (__flush_workqueue) from [<817ba1cc>] (nci_close_device+0x8c/0x130 net/nfc/nci/core.c:579) r10:00000003 r9:83e1b000 r8:84455250 r7:85a71030 r6:85a71018 r5:85a710c4 r4:85a71000 [<817ba140>] (nci_close_device) from [<817ba988>] (nci_unregister_device+0x24/0x98 net/nfc/nci/core.c:1301) r7:85a71000 r6:830d3990 r5:000e001b r4:8511d500 [<817ba964>] (nci_unregister_device) from [<80a84ef8>] (virtual_ncidev_close+0x18/0x30 drivers/nfc/virtual_ncidev.c:168) r9:83e1b000 r8:84455250 r7:838cca80 r6:830d3990 r5:000e001b r4:8511d500 [<80a84ee0>] (virtual_ncidev_close) from [<804eb340>] (__fput+0x84/0x2d4 fs/file_table.c:376) r5:000e001b r4:84ff9600 [<804eb2bc>] (__fput) from [<804eb60c>] (____fput+0x10/0x14 fs/file_table.c:404) r9:83e1b000 r8:82851628 r7:83e1b000 r6:83e1b874 r5:83e1b844 r4:00000000 [<804eb5fc>] (____fput) from [<8026aee4>] (task_work_run+0x90/0xb8 kernel/task_work.c:180) [<8026ae54>] (task_work_run) from [<8020bed8>] (resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]) [<8026ae54>] (task_work_run) from [<8020bed8>] (do_work_pending+0x400/0x4b0 arch/arm/kernel/signal.c:631) r9:83e1b000 r8:80200288 r7:00000003 r6:80200288 r5:ecc49fb0 r4:83e1b000 [<8020bad8>] (do_work_pending) from [<80200088>] (slow_work_pending+0xc/0x24) Exception stack(0xecc49fb0 to 0xecc49ff8) 9fa0: fffffff2 20000840 00000064 00000000 9fc0: 00000000 00000000 0014c748 00000003 7e8b532e 7e8b532f 003d0f00 76a670fc 9fe0: 76a66f08 76a66ef8 000167e8 00050bb0 60000010 00000003 r9:83e1b000 r8:80200288 r7:00000003 r6:0014c748 r5:00000000 r4:00000000 NMI backtrace for cpu 1 CPU: 1 PID: 30 Comm: khungtaskd Not tainted 6.8.0-rc6-syzkaller #0 Hardware name: ARM-Versatile Express Backtrace: [<8183816c>] (dump_backtrace) from [<81838268>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:256) r7:00000000 r6:00000013 r5:60000093 r4:81fbd5bc [<81838250>] (show_stack) from [<81855784>] (__dump_stack lib/dump_stack.c:88 [inline]) [<81838250>] (show_stack) from [<81855784>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<8185573c>] (dump_stack_lvl) from [<818557a8>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:00000001 r4:00000001 [<81855790>] (dump_stack) from [<81825598>] (nmi_cpu_backtrace+0x160/0x17c lib/nmi_backtrace.c:113) [<81825438>] (nmi_cpu_backtrace) from [<818256e4>] (nmi_trigger_cpumask_backtrace+0x130/0x1d8 lib/nmi_backtrace.c:62) r7:00000001 r6:8260c494 r5:8261a7d8 r4:ffffffff [<818255b4>] (nmi_trigger_cpumask_backtrace) from [<80210574>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:851) r9:827d8c5f r8:82895eb8 r7:8260c5ec r6:00007f2c r5:8261adc8 r4:8341d12c [<8021055c>] (arch_trigger_cpumask_backtrace) from [<80347eb4>] (trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]) [<8021055c>] (arch_trigger_cpumask_backtrace) from [<80347eb4>] (check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]) [<8021055c>] (arch_trigger_cpumask_backtrace) from [<80347eb4>] (watchdog+0x48c/0x59c kernel/hung_task.c:379) [<80347a28>] (watchdog) from [<8026e84c>] (kthread+0x104/0x134 kernel/kthread.c:388) r10:00000000 r9:df819e58 r8:82e9f3c0 r7:00000000 r6:80347a28 r5:82ee8c00 r4:82f458c0 [<8026e748>] (kthread) from [<80200104>] (ret_from_fork+0x14/0x30 arch/arm/kernel/entry-common.S:134) Exception stack(0xdf8d9fb0 to 0xdf8d9ff8) 9fa0: 00000000 00000000 00000000 00000000 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:8026e748 r4:82f458c0 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 2796 Comm: klogd Not tainted 6.8.0-rc6-syzkaller #0 Hardware name: ARM-Versatile Express PC is at __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] PC is at _raw_spin_unlock_irqrestore+0x28/0x54 kernel/locking/spinlock.c:194 LR is at spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] LR is at __wake_up_common_lock kernel/sched/wait.c:108 [inline] LR is at __wake_up_sync_key+0x4c/0x54 kernel/sched/wait.c:173 pc : [<8186284c>] lr : [<802a3638>] psr: 60000013 sp : ecaa1da0 ip : ecaa1db0 fp : ecaa1dac r10: 00000000 r9 : ecaa1e98 r8 : 82fbf000 r7 : a0000013 r6 : 00000001 r5 : 000000c3 r4 : 831502c0 r3 : 0000054a r2 : 00000000 r1 : a0000013 r0 : 831502c0 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 843ff300 DAC: fffffffd Backtrace: [<81862824>] (_raw_spin_unlock_irqrestore) from [<802a3638>] (spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]) [<81862824>] (_raw_spin_unlock_irqrestore) from [<802a3638>] (__wake_up_common_lock kernel/sched/wait.c:108 [inline]) [<81862824>] (_raw_spin_unlock_irqrestore) from [<802a3638>] (__wake_up_sync_key+0x4c/0x54 kernel/sched/wait.c:173) [<802a35ec>] (__wake_up_sync_key) from [<8135215c>] (sock_def_readable+0x44/0x11c net/core/sock.c:3342) r7:82fbcc00 r6:0000007a r5:83150000 r4:82fbcc00 [<81352118>] (sock_def_readable) from [<815f6768>] (unix_dgram_sendmsg+0x52c/0x9d4 net/unix/af_unix.c:2099) r7:82fbcc00 r6:0000007a r5:83150000 r4:82fbcc00 [<815f623c>] (unix_dgram_sendmsg) from [<8134ca38>] (sock_sendmsg_nosec net/socket.c:730 [inline]) [<815f623c>] (unix_dgram_sendmsg) from [<8134ca38>] (__sock_sendmsg+0x44/0x78 net/socket.c:745) r10:00000121 r9:836b8c00 r8:00000003 r7:83150000 r6:83150000 r5:ecaa1e98 r4:00000000 [<8134c9f4>] (__sock_sendmsg) from [<8134ed48>] (__sys_sendto+0x108/0x14c net/socket.c:2191) r7:83150000 r6:00000000 r5:00004000 r4:00000000 [<8134ec40>] (__sys_sendto) from [<8134edd0>] (__do_sys_send net/socket.c:2213 [inline]) [<8134ec40>] (__sys_sendto) from [<8134edd0>] (sys_send+0x20/0x28 net/socket.c:2210) r8:80200288 r7:00000121 r6:76fc95a0 r5:76fc95a0 r4:017d5be0 [<8134edb0>] (sys_send) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66) Exception stack(0xecaa1fa8 to 0xecaa1ff0) 1fa0: 017d5be0 76fc95a0 00000003 017d61e8 0000007a 00004000 1fc0: 017d5be0 76fc95a0 76fc95a0 00000121 00000000 00000013 76ea0e60 017d61eb 1fe0: 00000000 7ef92bc8 76e28460 76e2d918