INFO: task syz.4.1485:11923 blocked for more than 143 seconds. Not tainted 6.12.0-rc6-syzkaller-00005-g557329bcecc2 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.4.1485 state:D stack:26816 pid:11923 tgid:11921 ppid:10299 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5328 [inline] __schedule+0xe55/0x5740 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6782 schedule_timeout+0x258/0x2a0 kernel/time/timer.c:2591 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common+0x3e1/0x600 kernel/sched/completion.c:116 wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion_state+0x1c/0x40 kernel/sched/completion.c:264 coredump_wait fs/coredump.c:418 [inline] do_coredump+0x82f/0x4160 fs/coredump.c:575 get_signal+0x237c/0x26d0 kernel/signal.c:2902 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5dc557e719 RSP: 002b:00007f5dc6403038 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 RAX: ffffffffffffffda RBX: 00007f5dc5736058 RCX: 00007f5dc557e719 RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000020000040 RBP: 00007f5dc55f139e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f5dc5736058 R15: 00007ffcdbf47ea8 Showing all locks held in the system: 2 locks held by kworker/u8:2/29: #0: ffff8880b873ee98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:598 #1: ffff8880b8728a48 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x2c1/0x8e0 kernel/sched/psi.c:987 1 lock held by khungtaskd/31: #0: ffffffff8ddb7800 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8ddb7800 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8ddb7800 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6720 2 locks held by kworker/u8:10/2999: #0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x1212/0x1b30 kernel/workqueue.c:3204 #1: ffffc9000bc7fd80 (connector_reaper_work){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205 2 locks held by getty/5599: #0: ffff8880314350a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211 2 locks held by kworker/u8:13/10271: 2 locks held by syz.3.1206/10914: 1 lock held by syz.4.1485/11922: 1 lock held by syz.0.1752/13060: 3 locks held by syz.0.1826/13417: #0: ffffffff8faaf690 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x292/0x6b0 net/core/net_namespace.c:490 #1: ffffffff8fac5328 (rtnl_mutex){+.+.}-{3:3}, at: setup_net+0x40b/0x860 net/core/net_namespace.c:378 #2: ffffffff8ddc30f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:329 2 locks held by syz.3.1829/13436: #0: ffff88807c872008 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline] #0: ffff88807c872008 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release+0x86/0x270 net/socket.c:657 #1: ffff88801ad59258 (sk_lock-AF_CAN){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1611 [inline] #1: ffff88801ad59258 (sk_lock-AF_CAN){+.+.}-{0:0}, at: bcm_release+0x200/0x8d0 net/can/bcm.c:1575 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.12.0-rc6-syzkaller-00005-g557329bcecc2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] watchdog+0xf0c/0x1240 kernel/hung_task.c:379 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 11922 Comm: syz.4.1485 Not tainted 6.12.0-rc6-syzkaller-00005-g557329bcecc2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:sha256_transform_rorx+0x4bf/0x1120 arch/x86/crypto/sha256-avx2-asm.S:600 Code: f3 89 de c4 43 7b f0 e9 19 c4 43 7b f0 f1 0b 03 44 3c 2c 44 09 c6 c5 a5 72 d2 0a 45 89 d7 c4 63 7b f0 e3 0d 45 31 f5 45 31 df e5 73 d2 13 c4 43 7b f0 f1 06 45 21 cf 01 c2 21 ce c5 ed 73 d2 RSP: 0018:ffffc900131df200 EFLAGS: 00000286 RAX: 00000000f17f7c70 RBX: 0000000069dd3130 RCX: 00000000bde58029 RDX: 00000000606a06b4 RSI: 0000000069dff539 RDI: 0000000000000080 RBP: ffffc900131df420 R08: 0000000061cbc539 R09: 00000000a5eda0d7 R10: 000000009267eb52 R11: 00000000218f9938 R12: 0000000089834ee9 R13: 00000000ec24d666 R14: 000000001af4bdb4 R15: 00000000b3e8726a FS: 00007f5dc64246c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055557a46c588 CR3: 0000000033ffa000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline] sha256_base_do_update include/crypto/sha256_base.h:81 [inline] _sha256_update arch/x86/crypto/sha256_ssse3_glue.c:74 [inline] _sha256_update+0x17e/0x220 arch/x86/crypto/sha256_ssse3_glue.c:58 ima_calc_file_hash_tfm+0x302/0x3e0 security/integrity/ima/ima_crypto.c:491 ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline] ima_calc_file_hash+0x1ba/0x490 security/integrity/ima/ima_crypto.c:568 ima_collect_measurement+0x8a7/0xa10 security/integrity/ima/ima_api.c:293 process_measurement+0x1271/0x2370 security/integrity/ima/ima_main.c:372 ima_file_mmap+0x1b1/0x1d0 security/integrity/ima/ima_main.c:462 security_mmap_file+0x8bd/0x990 security/security.c:2979 vm_mmap_pgoff+0xdb/0x360 mm/util.c:584 ksys_mmap_pgoff+0x1c8/0x5c0 mm/mmap.c:542 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:86 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:79 [inline] __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:79 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5dc557e719 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5dc6424038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007f5dc5735f80 RCX: 00007f5dc557e719 RDX: 00004000000000df RSI: 2000000000000004 RDI: 0000000000000000 RBP: 00007f5dc55f139e R08: 0000000000000004 R09: 0000300000000000 R10: 0000000000040eb2 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f5dc5735f80 R15: 00007ffcdbf47ea8