INFO: task syz-executor.0:21690 blocked for more than 430 seconds. Not tainted 6.2.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:0 pid:21690 ppid:2951 flags:0x00000001 Backtrace: [<817b0428>] (__schedule) from [<817b0f50>] (schedule+0x5c/0xac kernel/sched/core.c:6631) r10:dfd51d34 r9:ffffff91 r8:00000000 r7:8500a580 r6:8532b504 r5:8532b480 r4:83e86780 [<817b0ef4>] (schedule) from [<812d6da4>] (__lock_sock+0x70/0xb8 net/core/sock.c:2904) r5:8532b480 r4:8532b4fc [<812d6d34>] (__lock_sock) from [<812d6e30>] (lock_sock_nested+0x44/0x48 net/core/sock.c:3475) r6:85038e00 r5:8532b4fc r4:8532b480 [<812d6dec>] (lock_sock_nested) from [<8174fe30>] (__mptcp_close_ssk+0x6c/0x25c net/mptcp/protocol.c:2322) r5:00000004 r4:8532b480 [<8174fdc4>] (__mptcp_close_ssk) from [<81751188>] (mptcp_destroy_common+0x70/0x194 net/mptcp/protocol.c:3152) r9:ffffff91 r8:dfd51dd4 r7:00000004 r6:8500aa48 r5:8500aa48 r4:8500a580 [<81751118>] (mptcp_destroy_common) from [<8175135c>] (mptcp_disconnect+0x50/0xc4 net/mptcp/protocol.c:3003) r7:dfd51ca8 r6:00000800 r5:00000000 r4:8500a580 [<8175130c>] (mptcp_disconnect) from [<814f1d1c>] (__inet_stream_connect+0x248/0x390 net/ipv4/af_inet.c:717) r5:845dd180 r4:8500a580 [<814f1ad4>] (__inet_stream_connect) from [<814b1f04>] (tcp_sendmsg_fastopen+0xe0/0x188 net/ipv4/tcp.c:1200) r10:dfd51d34 r9:00000000 r8:dfd51dd4 r7:dfd51ca8 r6:00000000 r5:dfd51e90 r4:8532b480 [<814b1e24>] (tcp_sendmsg_fastopen) from [<8174fcf0>] (mptcp_sendmsg_fastopen net/mptcp/protocol.c:1676 [inline]) [<814b1e24>] (tcp_sendmsg_fastopen) from [<8174fcf0>] (mptcp_sendmsg+0x5b4/0x688 net/mptcp/protocol.c:1715) r8:dfd51e90 r7:8532b480 r6:2000c040 r5:00000000 r4:8500a580 [<8174f73c>] (mptcp_sendmsg) from [<815827a8>] (inet6_sendmsg+0x40/0x4c net/ipv6/af_inet6.c:660) r10:dfd51d34 r9:00000000 r8:dfd51ed8 r7:00000000 r6:8500a580 r5:00000000 r4:dfd51e90 [<81582768>] (inet6_sendmsg) from [<812cf5c0>] (sock_sendmsg_nosec net/socket.c:714 [inline]) [<81582768>] (inet6_sendmsg) from [<812cf5c0>] (sock_sendmsg+0x3c/0x4c net/socket.c:734) r7:00000000 r6:845dd180 r5:845dd180 r4:dfd51e90 [<812cf584>] (sock_sendmsg) from [<812d025c>] (____sys_sendmsg+0x98/0x2a4 net/socket.c:2476) r5:2000c850 r4:dfd51e90 [<812d01c4>] (____sys_sendmsg) from [<812d2048>] (___sys_sendmsg+0x74/0xac net/socket.c:2530) r10:2000c850 r9:00000000 r8:dfd51ed8 r7:2000c850 r6:845dd180 r5:dfd51e90 r4:00000000 [<812d1fd4>] (___sys_sendmsg) from [<812d2574>] (__sys_sendmmsg+0x90/0x124 net/socket.c:2616) r8:2000c850 r7:845dd180 r6:00000001 r5:20003500 r4:00000000 [<812d24e4>] (__sys_sendmmsg) from [<812d2624>] (__do_sys_sendmmsg net/socket.c:2645 [inline]) [<812d24e4>] (__sys_sendmmsg) from [<812d2624>] (sys_sendmmsg+0x1c/0x24 net/socket.c:2642) r10:00000176 r9:83e86780 r8:80200288 r7:00000176 r6:0014c3dc r5:00000000 r4:00000000 [<812d2608>] (sys_sendmmsg) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66) Exception stack(0xdfd51fa8 to 0xdfd51ff0) 1fa0: 00000000 00000000 00000003 20003500 00000001 2000c850 1fc0: 00000000 00000000 0014c3dc 00000176 7efc53d2 76b476d0 7efc5544 76b4720c 1fe0: 76b47020 76b47010 00016f9c 0004df20 NMI backtrace for cpu 1 CPU: 1 PID: 26 Comm: khungtaskd Not tainted 6.2.0-rc1-syzkaller #0 Hardware name: ARM-Versatile Express Backtrace: [<817917d8>] (dump_backtrace) from [<817918cc>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:256) r7:00000000 r6:8240c5e0 r5:600f0093 r4:81d875f0 [<817918b4>] (show_stack) from [<817adcc8>] (__dump_stack lib/dump_stack.c:88 [inline]) [<817918b4>] (show_stack) from [<817adcc8>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<817adc80>] (dump_stack_lvl) from [<817adcec>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:00000001 r4:00000001 [<817adcd4>] (dump_stack) from [<8177f1c0>] (nmi_cpu_backtrace+0x170/0x18c lib/nmi_backtrace.c:111) [<8177f050>] (nmi_cpu_backtrace) from [<8177f35c>] (nmi_trigger_cpumask_backtrace+0x180/0x228 lib/nmi_backtrace.c:62) r9:00000002 r8:8020fdd4 r7:00000001 r6:8240c5e0 r5:8240c49c r4:00000000 [<8177f1dc>] (nmi_trigger_cpumask_backtrace) from [<80211058>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:854) r10:00000064 r9:000614c1 r8:82404d40 r7:00007f4f r6:8268d9a8 r5:8240c5fc r4:832cb264 r3:00000001 [<80211040>] (arch_trigger_cpumask_backtrace) from [<80332b98>] (trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]) [<80211040>] (arch_trigger_cpumask_backtrace) from [<80332b98>] (check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]) [<80211040>] (arch_trigger_cpumask_backtrace) from [<80332b98>] (watchdog+0x4a8/0x590 kernel/hung_task.c:377) [<803326f0>] (watchdog) from [<8026a030>] (kthread+0xec/0x11c kernel/kthread.c:376) r10:00000000 r9:df819e4c r8:82aa06c0 r7:00000000 r6:803326f0 r5:828fae00 r4:82a32280 [<80269f44>] (kthread) from [<80200100>] (ret_from_fork+0x14/0x34 arch/arm/kernel/entry-common.S:148) Exception stack(0xdf8c9fb0 to 0xdf8c9ff8) 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 r5:80269f44 r4:82a32280 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 2729 Comm: syslogd Not tainted 6.2.0-rc1-syzkaller #0 Hardware name: ARM-Versatile Express PC is at iocb_is_dsync include/linux/fs.h:2871 [inline] PC is at generic_write_sync include/linux/fs.h:2881 [inline] PC is at generic_file_write_iter+0xe8/0x100 mm/filemap.c:3936 LR is at __up_write kernel/locking/rwsem.c:1366 [inline] LR is at up_write+0x48/0x88 kernel/locking/rwsem.c:1615 pc : [<803f7c80>] lr : [<802a11e0>] psr: 600f0013 sp : ec3bdea8 ip : 00000010 fp : ec3bded4 r10: 00004004 r9 : 83205c00 r8 : 01a8d4b8 r7 : ec3bdef0 r6 : ec3bdf08 r5 : 874c18d8 r4 : 00000050 r3 : 874c1850 r2 : 70818000 r1 : 00000000 r0 : 850ffd80 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 8417d880 DAC: fffffffd Backtrace: [<803f7b98>] (generic_file_write_iter) from [<804b165c>] (call_write_iter include/linux/fs.h:2186 [inline]) [<803f7b98>] (generic_file_write_iter) from [<804b165c>] (new_sync_write fs/read_write.c:491 [inline]) [<803f7b98>] (generic_file_write_iter) from [<804b165c>] (vfs_write+0x2c4/0x3bc fs/read_write.c:584) r7:ec3bdf68 r6:00000050 r5:850ffd80 r4:803f7b98 [<804b1398>] (vfs_write) from [<804b18bc>] (ksys_write+0x68/0xec fs/read_write.c:637) r10:00000004 r9:83205c00 r8:80200288 r7:00000000 r6:000027d5 r5:850ffd80 r4:850ffd80 [<804b1854>] (ksys_write) from [<804b1950>] (__do_sys_write fs/read_write.c:649 [inline]) [<804b1854>] (ksys_write) from [<804b1950>] (sys_write+0x10/0x14 fs/read_write.c:646) r7:00000004 r6:76f3a080 r5:01a8d4b8 r4:00000003 [<804b1940>] (sys_write) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66) Exception stack(0xec3bdfa8 to 0xec3bdff0) dfa0: 00000003 01a8d4b8 00000003 01a8d4b8 00000050 00000000 dfc0: 00000003 01a8d4b8 76f3a080 00000004 000d6c84 000d6cb0 000d6c90 7e9e6c9c dfe0: 000d63bc 7e9e6bb0 00019aa8 76e5e7bc