ci2 starts bisection 2023-06-07 22:09:28.845750777 +0000 UTC m=+17241.083392285 bisecting fixing commit since ca48fc16c49388400eddd6c6614593ebf7c7726a building syzkaller on 90c93c40627cb0ac3c2c7cb99d807fd4c137adcb ensuring issue is reproducible on original commit ca48fc16c49388400eddd6c6614593ebf7c7726a testing commit ca48fc16c49388400eddd6c6614593ebf7c7726a gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 0ff41dc4e9d9b0b4fa7f70c8684dad8aa77717b67621b17f9a604528854c87d4 all runs: crashed: INFO: task hung in lock_extent testing current HEAD 76ba310227d2490018c271f1ecabb6c0a3212eb0 testing commit 76ba310227d2490018c271f1ecabb6c0a3212eb0 gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 73cd939c6946a7315f5e9e263555e9b4eb0db68536bfd25a65dc9fa1723e7bec all runs: crashed: INFO: task hung in lock_extent crash still not fixed/happens on the oldest tested release revisions tested: 2, total time: 50m5.55759425s (build: 37m44.306925556s, test: 11m55.172412676s) crash still not fixed on HEAD or HEAD had kernel test errors commit msg: Linux 6.1.32 crash: INFO: task hung in lock_extent INFO: task syz-executor.0:4697 blocked for more than 143 seconds. Not tainted 6.1.32-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:0 pid:4697 ppid:4574 flags:0x00000009 Call trace: __switch_to+0x280/0x5b4 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5241 [inline] __schedule+0xec4/0x1c5c kernel/sched/core.c:6554 schedule+0xc4/0x170 kernel/sched/core.c:6630 wait_on_state fs/btrfs/extent-io-tree.c:709 [inline] wait_extent_bit+0x344/0x428 fs/btrfs/extent-io-tree.c:742 lock_extent+0xb4/0x178 fs/btrfs/extent-io-tree.c:1657 btrfs_page_mkwrite+0x504/0xa60 fs/btrfs/inode.c:8457 do_page_mkwrite+0x128/0x2d8 mm/memory.c:2973 wp_page_shared+0x134/0x428 mm/memory.c:3319 do_wp_page+0x214/0xb6c mm/memory.c:3469 handle_pte_fault mm/memory.c:4982 [inline] __handle_mm_fault mm/memory.c:5106 [inline] handle_mm_fault+0x186c/0x3760 mm/memory.c:5227 __do_page_fault arch/arm64/mm/fault.c:512 [inline] do_page_fault+0x490/0x770 arch/arm64/mm/fault.c:612 do_mem_abort+0x70/0x1e8 arch/arm64/mm/fault.c:831 el1_abort+0x3c/0x5c arch/arm64/kernel/entry-common.c:367 el1h_64_sync_handler+0x60/0xac arch/arm64/kernel/entry-common.c:427 el1h_64_sync+0x64/0x68 arch/arm64/kernel/entry.S:576 __arch_copy_to_user+0x88/0x234 arch/arm64/lib/copy_template.S:90 emit_last_fiemap_cache fs/btrfs/extent_io.c:3598 [inline] extent_fiemap+0x126c/0x1630 fs/btrfs/extent_io.c:4129 btrfs_fiemap+0x108/0x16c fs/btrfs/inode.c:8129 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x1348/0x1e88 fs/ioctl.c:810 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __arm64_sys_ioctl+0xb4/0x14c fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x7c/0x258 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x160/0x1e4 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x54/0x178 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffff80001441c4f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:510 1 lock held by rcu_tasks_trace/13: #0: ffff80001441ccf0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:510 1 lock held by khungtaskd/28: #0: ffff80001441c320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:305 2 locks held by getty/3980: #0: ffff0000d5b4a098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x38/0x48 drivers/tty/tty_ldsem.c:340 #1: ffff80001c16e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x30c/0xe68 drivers/tty/n_tty.c:2177 4 locks held by syz-executor.0/4697: #0: ffff0000e4859920 (&sb->s_type->i_mutex_key#20){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:766 [inline] #0: ffff0000e4859920 (&sb->s_type->i_mutex_key#20){++++}-{3:3}, at: btrfs_inode_lock+0x38/0x74 fs/btrfs/inode.c:147 #1: ffff0000d53a2b48 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #1: ffff0000d53a2b48 (&mm->mmap_lock){++++}-{3:3}, at: do_page_fault+0x234/0x770 arch/arm64/mm/fault.c:593 #2: ffff0000cce3e558 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x128/0x2d8 mm/memory.c:2973 #3: ffff0000e48597a8 (&ei->i_mmap_lock){.+.+}-{3:3}, at: btrfs_page_mkwrite+0x400/0xa60 fs/btrfs/inode.c:8446 1 lock held by syz-executor.0/7086: =============================================