INFO: task syz-executor.4:16909 blocked for more than 143 seconds. Not tainted 5.15.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:25944 pid:16909 ppid: 6536 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4969 [inline] __schedule+0xa9a/0x4940 kernel/sched/core.c:6250 schedule+0xd2/0x260 kernel/sched/core.c:6323 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x174/0x270 kernel/sched/completion.c:138 kthread_stop+0x17a/0x710 kernel/kthread.c:648 gfs2_make_fs_ro+0x118/0x610 fs/gfs2/super.c:528 signal_our_withdraw fs/gfs2/util.c:166 [inline] gfs2_withdraw.cold+0x495/0xf44 fs/gfs2/util.c:343 gfs2_meta_check_ii+0x68/0xa0 fs/gfs2/util.c:501 gfs2_metatype_check_i fs/gfs2/util.h:126 [inline] gfs2_metatype_check_i fs/gfs2/util.h:116 [inline] gfs2_quota_init+0xca3/0xf70 fs/gfs2/quota.c:1387 gfs2_make_fs_rw+0x470/0x640 fs/gfs2/super.c:153 gfs2_fill_super+0x2376/0x28a0 fs/gfs2/ops_fstype.c:1271 get_tree_bdev+0x440/0x760 fs/super.c:1295 gfs2_get_tree+0x4a/0x270 fs/gfs2/ops_fstype.c:1327 vfs_get_tree+0x89/0x2f0 fs/super.c:1500 do_new_mount fs/namespace.c:2988 [inline] path_mount+0x1320/0x1fa0 fs/namespace.c:3318 do_mount fs/namespace.c:3331 [inline] __do_sys_mount fs/namespace.c:3539 [inline] __se_sys_mount fs/namespace.c:3516 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3516 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f65a019f01a RSP: 002b:00007f659d712fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f65a019f01a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f659d713000 RBP: 00007f659d713040 R08: 00007f659d713040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f659d713000 R15: 0000000020047a20 INFO: task gfs2_quotad:16954 blocked for more than 143 seconds. Not tainted 5.15.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:gfs2_quotad state:D stack:27856 pid:16954 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4969 [inline] __schedule+0xa9a/0x4940 kernel/sched/core.c:6250 schedule+0xd2/0x260 kernel/sched/core.c:6323 bit_wait+0x12/0xd0 kernel/sched/wait_bit.c:199 __wait_on_bit+0x60/0x190 kernel/sched/wait_bit.c:49 out_of_line_wait_on_bit+0xd5/0x110 kernel/sched/wait_bit.c:64 wait_on_bit include/linux/wait_bit.h:76 [inline] wait_on_bit include/linux/wait_bit.h:71 [inline] __gfs2_glock_dq+0x73a/0xa90 fs/gfs2/glock.c:1637 gfs2_glock_dq fs/gfs2/glock.c:1701 [inline] gfs2_glock_dq_uninit+0x45/0x160 fs/gfs2/glock.c:1721 gfs2_statfs_sync+0x3c7/0x540 fs/gfs2/super.c:306 gfs2_quotad+0x5d1/0x830 fs/gfs2/quota.c:1557 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8b983a20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458 1 lock held by in:imklog/6213: 2 locks held by agetty/6218: #0: ffff888015d6c098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252 #1: ffffc900029f82e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113 2 locks held by agetty/6443: #0: ffff88807aa4c098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252 #1: ffffc9000298c2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113 1 lock held by syz-executor.4/16909: #0: ffff8880b0e220e0 (&type->s_umount_key#89/1){+.+.}-{3:3}, at: alloc_super+0x1dd/0xac0 fs/super.c:229 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xc1d/0xf50 kernel/hung_task.c:295 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 8392 Comm: kworker/1:5 Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events nsim_dev_trap_report_work RIP: 0010:rol32 include/linux/bitops.h:109 [inline] RIP: 0010:chacha_permute+0x495/0x6e0 lib/crypto/chacha.c:32 Code: 45 01 e7 44 31 d2 01 f0 44 31 f9 c1 c2 0c 31 c7 89 44 24 0c c1 c1 0c 41 31 dd 89 f8 8b 7c 24 08 41 01 c8 41 c1 c5 08 45 31 c4 c0 0c 41 c1 c4 08 01 d7 31 fd 41 01 c3 45 01 e7 c1 c5 08 44 31 RSP: 0018:ffffc9001809f9c0 EFLAGS: 00000086 RAX: 00000000c337f390 RBX: 00000000e5cb320a RCX: 000000006142fc09 RDX: 00000000af07845b RSI: 000000006f1ea0b3 RDI: 00000000cb58d50b RBP: 0000000022039c04 R08: 000000008df62639 R09: 000000006a2bdc54 R10: 00000000a328b89a R11: 0000000030870351 R12: 000000009019cb5c R13: 00000000ce49e48a R14: 0000000092470dc7 R15: 0000000077b5e8f1 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007facd4da7000 CR3: 000000001a02b000 CR4: 0000000000350ee0 Call Trace: chacha_block_generic+0x98/0x250 lib/crypto/chacha.c:83 chacha20_block include/crypto/chacha.h:36 [inline] _extract_crng+0x12f/0x250 drivers/char/random.c:1000 extract_crng drivers/char/random.c:1016 [inline] _get_random_bytes+0x229/0x670 drivers/char/random.c:1538 nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:772 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:802 [inline] nsim_dev_trap_report_work+0x72e/0xbc0 drivers/net/netdevsim/dev.c:843 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298 worker_thread+0x658/0x11f0 kernel/workqueue.c:2445 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ---------------- Code disassembly (best guess): 0: 45 01 e7 add %r12d,%r15d 3: 44 31 d2 xor %r10d,%edx 6: 01 f0 add %esi,%eax 8: 44 31 f9 xor %r15d,%ecx b: c1 c2 0c rol $0xc,%edx e: 31 c7 xor %eax,%edi 10: 89 44 24 0c mov %eax,0xc(%rsp) 14: c1 c1 0c rol $0xc,%ecx 17: 41 31 dd xor %ebx,%r13d 1a: 89 f8 mov %edi,%eax 1c: 8b 7c 24 08 mov 0x8(%rsp),%edi 20: 41 01 c8 add %ecx,%r8d 23: 41 c1 c5 08 rol $0x8,%r13d 27: 45 31 c4 xor %r8d,%r12d * 2a: c1 c0 0c rol $0xc,%eax <-- trapping instruction 2d: 41 c1 c4 08 rol $0x8,%r12d 31: 01 d7 add %edx,%edi 33: 31 fd xor %edi,%ebp 35: 41 01 c3 add %eax,%r11d 38: 45 01 e7 add %r12d,%r15d 3b: c1 c5 08 rol $0x8,%ebp 3e: 44 rex.R 3f: 31 .byte 0x31