INFO: task syz-executor.0:3518 blocked for more than 430 seconds. Not tainted 6.8.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:0 pid:3518 tgid:3518 ppid:1 flags:0x00000005 Backtrace: [<81857404>] (__schedule) from [<8185803c>] (__schedule_loop kernel/sched/core.c:6802 [inline]) [<81857404>] (__schedule) from [<8185803c>] (schedule+0x2c/0xb8 kernel/sched/core.c:6817) r10:00000000 r9:00000000 r8:83236238 r7:00000002 r6:df99dbec r5:836d1800 r4:836d1800 [<81858010>] (schedule) from [<81858608>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:6874) r5:836d1800 r4:83236234 [<818585f0>] (schedule_preempt_disabled) from [<8185aef0>] (__mutex_lock_common kernel/locking/mutex.c:684 [inline]) [<818585f0>] (schedule_preempt_disabled) from [<8185aef0>] (__mutex_lock.constprop.0+0x2e8/0xae0 kernel/locking/mutex.c:752) [<8185ac08>] (__mutex_lock.constprop.0) from [<8185b7bc>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1040) r10:00000000 r9:8348b015 r8:83236000 r7:00000000 r6:83254990 r5:83236000 r4:83254990 [<8185b7a8>] (__mutex_lock_slowpath) from [<8185b7fc>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:286) [<8185b7c0>] (mutex_lock) from [<8068bd78>] (fuse_lock_inode+0x34/0x3c fs/fuse/inode.c:544) [<8068bd44>] (fuse_lock_inode) from [<80680368>] (fuse_lookup+0x54/0x160 fs/fuse/dir.c:424) [<80680314>] (fuse_lookup) from [<804f7c80>] (__lookup_slow+0x8c/0x134 fs/namei.c:1693) r8:83236000 r7:00000013 r6:df99de60 r5:830ae630 r4:83254990 [<804f7bf4>] (__lookup_slow) from [<804fbf94>] (lookup_slow fs/namei.c:1710 [inline]) [<804f7bf4>] (__lookup_slow) from [<804fbf94>] (walk_component+0x104/0x170 fs/namei.c:2001) r8:00000013 r7:00000002 r6:df99de58 r5:83236088 r4:830ae630 [<804fbe90>] (walk_component) from [<804fc264>] (link_path_walk.part.0.constprop.0+0x264/0x390 fs/namei.c:2328) r9:8348b015 r8:2f2f2f2f r7:d0d0d0d0 r6:df99de58 r5:fefefeff r4:80808080 [<804fc000>] (link_path_walk.part.0.constprop.0) from [<804fcdac>] (link_path_walk fs/namei.c:2253 [inline]) [<804fc000>] (link_path_walk.part.0.constprop.0) from [<804fcdac>] (path_openat+0x98/0x10e0 fs/namei.c:3794) r10:84c1c600 r9:8348b010 r8:df99de58 r7:df99df20 r6:df99df20 r5:836d1800 r4:8348b000 [<804fcd14>] (path_openat) from [<804fe5d4>] (do_filp_open+0x9c/0x138 fs/namei.c:3825) r10:00000142 r9:836d1800 r8:00000003 r7:df99de58 r6:df99df20 r5:836d1800 r4:8348b000 [<804fe538>] (do_filp_open) from [<804e62a8>] (do_sys_openat2+0xbc/0xe4 fs/open.c:1404) r8:80200288 r7:ffffff9c r6:00000003 r5:df99df58 r4:8348b000 [<804e61ec>] (do_sys_openat2) from [<804e66b0>] (do_sys_open fs/open.c:1419 [inline]) [<804e61ec>] (do_sys_openat2) from [<804e66b0>] (__do_sys_openat fs/open.c:1435 [inline]) [<804e61ec>] (do_sys_openat2) from [<804e66b0>] (sys_openat+0x98/0xd4 fs/open.c:1430) r7:00000142 r6:00000000 r5:00093608 r4:ffffff9c [<804e6618>] (sys_openat) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66) Exception stack(0xdf99dfa8 to 0xdf99dff0) dfa0: 00000002 7e9f161c ffffff9c 00093608 000a4800 00000000 dfc0: 00000002 7e9f161c 00000000 00000142 00140000 00000000 7e9f1670 7e9f1630 dfe0: 0011c000 7e9f1580 0004b8d4 000502b8 r5:7e9f161c r4:00000002 INFO: task syz-executor.0:3923 blocked for more than 430 seconds. Not tainted 6.8.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:0 pid:3923 tgid:3917 ppid:3518 flags:0x00000005 Backtrace: [<81857404>] (__schedule) from [<8185803c>] (__schedule_loop kernel/sched/core.c:6802 [inline]) [<81857404>] (__schedule) from [<8185803c>] (schedule+0x2c/0xb8 kernel/sched/core.c:6817) r10:dfffdc74 r9:82fcca3c r8:843ec058 r7:dfffdb60 r6:843ec058 r5:dfffdbe8 r4:83e83c00 [<81858010>] (schedule) from [<8067dbfc>] (request_wait_answer fs/fuse/dev.c:407 [inline]) [<81858010>] (schedule) from [<8067dbfc>] (__fuse_request_send fs/fuse/dev.c:426 [inline]) [<81858010>] (schedule) from [<8067dbfc>] (fuse_simple_request+0x384/0x508 fs/fuse/dev.c:513) r5:dfffdbe8 r4:843ec000 [<8067d878>] (fuse_simple_request) from [<806801dc>] (fuse_lookup_name+0xa4/0x1dc fs/fuse/dir.c:386) r9:844bb440 r8:830ae1c8 r7:00000001 r6:00000000 r5:84406000 r4:dfffdc78 [<80680138>] (fuse_lookup_name) from [<80680394>] (fuse_lookup+0x80/0x160 fs/fuse/dir.c:425) r10:00000000 r9:8348e015 r8:00000001 r7:00000000 r6:830ae1b0 r5:83236000 r4:830ae1b0 [<80680314>] (fuse_lookup) from [<804f7c80>] (__lookup_slow+0x8c/0x134 fs/namei.c:1693) r8:83236000 r7:00000011 r6:dfffde60 r5:830ae630 r4:830ae1b0 [<804f7bf4>] (__lookup_slow) from [<804fbf94>] (lookup_slow fs/namei.c:1710 [inline]) [<804f7bf4>] (__lookup_slow) from [<804fbf94>] (walk_component+0x104/0x170 fs/namei.c:2001) r8:00000011 r7:00000002 r6:dfffde58 r5:83236088 r4:830ae630 [<804fbe90>] (walk_component) from [<804fc264>] (link_path_walk.part.0.constprop.0+0x264/0x390 fs/namei.c:2328) r9:8348e015 r8:2f2f2f2f r7:d0d0d0d0 r6:dfffde58 r5:fefefeff r4:80808080 [<804fc000>] (link_path_walk.part.0.constprop.0) from [<804fcdac>] (link_path_walk fs/namei.c:2253 [inline]) [<804fc000>] (link_path_walk.part.0.constprop.0) from [<804fcdac>] (path_openat+0x98/0x10e0 fs/namei.c:3794) r10:84c1cd80 r9:8348e010 r8:dfffde58 r7:dfffdf20 r6:dfffdf20 r5:83e83c00 r4:8348e000 [<804fcd14>] (path_openat) from [<804fe5d4>] (do_filp_open+0x9c/0x138 fs/namei.c:3825) r10:00000142 r9:83e83c00 r8:00000001 r7:dfffde58 r6:dfffdf20 r5:83e83c00 r4:8348e000 [<804fe538>] (do_filp_open) from [<804e62a8>] (do_sys_openat2+0xbc/0xe4 fs/open.c:1404) r8:80200288 r7:ffffff9c r6:00000005 r5:dfffdf58 r4:8348e000 [<804e61ec>] (do_sys_openat2) from [<804e66b0>] (do_sys_open fs/open.c:1419 [inline]) [<804e61ec>] (do_sys_openat2) from [<804e66b0>] (__do_sys_openat fs/open.c:1435 [inline]) [<804e61ec>] (do_sys_openat2) from [<804e66b0>] (sys_openat+0x98/0xd4 fs/open.c:1430) r7:00000142 r6:00000000 r5:76b62da0 r4:ffffff9c [<804e6618>] (sys_openat) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66) Exception stack(0xdfffdfa8 to 0xdfffdff0) dfa0: 00000002 76b62da0 ffffff9c 76b62da0 00000002 00000000 dfc0: 00000002 76b62da0 00000000 00000142 00000000 6e743000 20000240 20000a40 dfe0: 0000005c 76b62d10 00091144 0004ee98 r5:76b62da0 r4:00000002 NMI backtrace for cpu 0 CPU: 0 PID: 31 Comm: khungtaskd Not tainted 6.8.0-rc2-syzkaller #0 Hardware name: ARM-Versatile Express Backtrace: [<81835fac>] (dump_backtrace) from [<818360a8>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:256) r7:00000000 r6:00000013 r5:60000093 r4:81fbcf44 [<81836090>] (show_stack) from [<8185359c>] (__dump_stack lib/dump_stack.c:88 [inline]) [<81836090>] (show_stack) from [<8185359c>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<81853554>] (dump_stack_lvl) from [<818535c0>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:00000000 r4:00000001 [<818535a8>] (dump_stack) from [<818233d8>] (nmi_cpu_backtrace+0x160/0x17c lib/nmi_backtrace.c:113) [<81823278>] (nmi_cpu_backtrace) from [<81823524>] (nmi_trigger_cpumask_backtrace+0x130/0x1d8 lib/nmi_backtrace.c:62) r7:00000000 r6:8260c494 r5:8261a7d8 r4:ffffffff [<818233f4>] (nmi_trigger_cpumask_backtrace) from [<80210574>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:851) r9:827d8c1f r8:82894eb8 r7:8260c5ec r6:00007f5b r5:8261adc8 r4:84c1512c [<8021055c>] (arch_trigger_cpumask_backtrace) from [<80347e54>] (trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]) [<8021055c>] (arch_trigger_cpumask_backtrace) from [<80347e54>] (check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]) [<8021055c>] (arch_trigger_cpumask_backtrace) from [<80347e54>] (watchdog+0x48c/0x59c kernel/hung_task.c:379) [<803479c8>] (watchdog) from [<8026e888>] (kthread+0x104/0x134 kernel/kthread.c:388) r10:00000000 r9:df819e58 r8:82f23580 r7:00000000 r6:803479c8 r5:82e90c00 r4:82ec78c0 [<8026e784>] (kthread) from [<80200104>] (ret_from_fork+0x14/0x30 arch/arm/kernel/entry-common.S:134) Exception stack(0xdf8ddfb0 to 0xdf8ddff8) dfa0: 00000000 00000000 00000000 00000000 dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 dfe0: 00000000 00000000 00000000 00000000 00000013 00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:8026e784 r4:82ec78c0 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 2797 Comm: klogd Not tainted 6.8.0-rc2-syzkaller #0 Hardware name: ARM-Versatile Express PC is at kmap_local_sched_in kernel/sched/core.c:5180 [inline] PC is at finish_task_switch+0x8c/0x294 kernel/sched/core.c:5282 LR is at __raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline] LR is at _raw_spin_unlock+0x2c/0x50 kernel/locking/spinlock.c:186 pc : [<8027b490>] lr : [<81860518>] psr: 20000013 sp : ec651cb0 ip : ec651ca0 fp : ec651cf4 r10: 00000000 r9 : 83ce1800 r8 : 83cfb000 r7 : a3ec4f70 r6 : 81857808 r5 : ddde4600 r4 : 00000000 r3 : 83ce1800 r2 : 00000001 r1 : 81fbcf44 r0 : 00000001 Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none Control: 30c5387d Table: 846dbc00 DAC: 00000000 Backtrace: [<8027b404>] (finish_task_switch) from [<81857808>] (context_switch kernel/sched/core.c:5403 [inline]) [<8027b404>] (finish_task_switch) from [<81857808>] (__schedule+0x404/0xc0c kernel/sched/core.c:6727) r10:00000000 r9:84124f00 r8:fa227c87 r7:a3ec4f70 r6:83ce1800 r5:ddde4600 r4:83cfb000 [<81857404>] (__schedule) from [<8185803c>] (__schedule_loop kernel/sched/core.c:6802 [inline]) [<81857404>] (__schedule) from [<8185803c>] (schedule+0x2c/0xb8 kernel/sched/core.c:6817) r10:00000000 r9:83ce1800 r8:8368c900 r7:83ce1800 r6:83691780 r5:00000000 r4:83ce1800 [<81858010>] (schedule) from [<8185f5e4>] (schedule_timeout+0xe4/0x114 kernel/time/timer.c:2159) r5:00000000 r4:7fffffff [<8185f500>] (schedule_timeout) from [<815f044c>] (unix_wait_for_peer+0xcc/0xd8 net/unix/af_unix.c:1474) r7:83691500 r6:83691780 r5:83691500 r4:7fffffff [<815f0380>] (unix_wait_for_peer) from [<815f5518>] (unix_dgram_sendmsg+0x97c/0x9e8 net/unix/af_unix.c:2078) r6:0000007b r5:83049400 r4:ec651e98 [<815f4b9c>] (unix_dgram_sendmsg) from [<8134baa8>] (sock_sendmsg_nosec net/socket.c:730 [inline]) [<815f4b9c>] (unix_dgram_sendmsg) from [<8134baa8>] (__sock_sendmsg+0x44/0x78 net/socket.c:745) r10:00000121 r9:83ce1800 r8:00000003 r7:83049400 r6:83049400 r5:ec651e98 r4:00000000 [<8134ba64>] (__sock_sendmsg) from [<8134ddb8>] (__sys_sendto+0x108/0x14c net/socket.c:2191) r7:83049400 r6:00000000 r5:00004000 r4:00000000 [<8134dcb0>] (__sys_sendto) from [<8134de40>] (__do_sys_send net/socket.c:2213 [inline]) [<8134dcb0>] (__sys_sendto) from [<8134de40>] (sys_send+0x20/0x28 net/socket.c:2210) r8:80200288 r7:00000121 r6:76f795a0 r5:76f795a0 r4:004bf1a8 [<8134de20>] (sys_send) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66) Exception stack(0xec651fa8 to 0xec651ff0) 1fa0: 004bf1a8 76f795a0 00000003 004c7a10 0000007b 00004000 1fc0: 004bf1a8 76f795a0 76f795a0 00000121 00000000 00000013 76e50e60 004c7a13 1fe0: 00000000 7ede3bc8 76dd8460 76ddd918