syzbot


BUG: scheduling while atomic in simple_recursive_removal

Status: closed as dup on 2022/04/02 10:56
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+2778a29e60b4982065a0@syzkaller.appspotmail.com
First crash: 755d, last: 752d
Duplicate of
Title Repro Cause bisect Fix bisect Count Last Reported
BUG: sleeping function called from invalid context in blk_mq_release block 1 753d 753d
Duplicate bugs (1)
duplicates (1):
Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
BUG: scheduling while atomic: syz-fuzzer/NUM/ADDR fs 2 757d 754d 0/26 closed as dup on 2022/03/31 05:47
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] BUG: scheduling while atomic in simple_recursive_removal 2 (3) 2022/04/05 12:07

Sample crash report:
BUG: scheduling while atomic: syz-fuzzer/2193/0x00000101
Modules linked in:
CPU: 0 PID: 2193 Comm: syz-fuzzer Not tainted 5.17.0-syzkaller-13673-ge8b767f5e040 #0
Hardware name: linux,dummy-virt (DT)
Call trace:
 dump_backtrace.part.0+0xcc/0xe0 arch/arm64/kernel/stacktrace.c:184
 dump_backtrace arch/arm64/kernel/stacktrace.c:190 [inline]
 show_stack+0x18/0x6c arch/arm64/kernel/stacktrace.c:191
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x68/0x84 lib/dump_stack.c:106
 dump_stack+0x18/0x34 lib/dump_stack.c:113
 __schedule_bug+0x60/0x80 kernel/sched/core.c:5617
 schedule_debug kernel/sched/core.c:5644 [inline]
 __schedule+0x74c/0x7f0 kernel/sched/core.c:6273
 schedule+0x54/0xd0 kernel/sched/core.c:6454
 rwsem_down_write_slowpath+0x29c/0x5a0 kernel/locking/rwsem.c:1142
 __down_write_common kernel/locking/rwsem.c:1259 [inline]
 __down_write_common kernel/locking/rwsem.c:1256 [inline]
 __down_write kernel/locking/rwsem.c:1268 [inline]
 down_write+0x58/0x64 kernel/locking/rwsem.c:1515
 inode_lock include/linux/fs.h:777 [inline]
 simple_recursive_removal+0x124/0x270 fs/libfs.c:288
 debugfs_remove fs/debugfs/inode.c:742 [inline]
 debugfs_remove+0x5c/0x80 fs/debugfs/inode.c:736
 blk_release_queue+0x7c/0xf0 block/blk-sysfs.c:784
 kobject_cleanup lib/kobject.c:705 [inline]
 kobject_release lib/kobject.c:736 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x98/0x114 lib/kobject.c:753
 blk_put_queue+0x14/0x20 block/blk-core.c:270
 blkg_free.part.0+0x54/0x80 block/blk-cgroup.c:86
 blkg_free block/blk-cgroup.c:78 [inline]
 __blkg_release+0x44/0x70 block/blk-cgroup.c:102
 rcu_do_batch kernel/rcu/tree.c:2535 [inline]
 rcu_core+0x324/0x590 kernel/rcu/tree.c:2786
 rcu_core_si+0x10/0x20 kernel/rcu/tree.c:2803
 _stext+0x124/0x2a0
 do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
 invoke_softirq kernel/softirq.c:439 [inline]
 __irq_exit_rcu+0xe4/0x100 kernel/softirq.c:637
 irq_exit_rcu+0x10/0x1c kernel/softirq.c:649
 el0_interrupt+0x6c/0x104 arch/arm64/kernel/entry-common.c:693
 __el0_irq_handler_common+0x18/0x2c arch/arm64/kernel/entry-common.c:700
 el0t_64_irq_handler+0x10/0x20 arch/arm64/kernel/entry-common.c:705
 el0t_64_irq+0x198/0x19c arch/arm64/kernel/entry.S:582
------------[ cut here ]------------
WARNING: CPU: 0 PID: 13 at kernel/rcu/tree.c:2592 rcu_do_batch kernel/rcu/tree.c:2592 [inline]
WARNING: CPU: 0 PID: 13 at kernel/rcu/tree.c:2592 rcu_core+0x4d4/0x590 kernel/rcu/tree.c:2786
Modules linked in:
CPU: 0 PID: 13 Comm: ksoftirqd/0 Tainted: G        W         5.17.0-syzkaller-13673-ge8b767f5e040 #0
Hardware name: linux,dummy-virt (DT)
pstate: a04000c9 (NzCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : rcu_do_batch kernel/rcu/tree.c:2592 [inline]
pc : rcu_core+0x4d4/0x590 kernel/rcu/tree.c:2786
lr : rcu_do_batch kernel/rcu/tree.c:2572 [inline]
lr : rcu_core+0x38c/0x590 kernel/rcu/tree.c:2786
sp : ffff80000a68bd00
x29: ffff80000a68bd00 x28: ffff8000081224e8 x27: 0000000000000000
x26: 000000000000000a x25: fffffffffffffffd x24: ffff80000a68bd60
x23: ffff80000a35cc00 x22: ffff00007fbc29b8 x21: 0000000000000000
x20: ffff00007fbc2940 x19: 0000000000000000 x18: 0000000000000000
x17: ffff800075990000 x16: ffff800008004000 x15: 000005d742138530
x14: 00000000000003cb x13: 0000000000000001 x12: 0000000000000001
x11: 0000000000000002 x10: ffff800075990000 x9 : 00000000005b8d80
x8 : ffff8000080102a0 x7 : ffff80000a68b9e4 x6 : 00000000000e7e38
x5 : fcff00000516f900 x4 : ffff00007fbc65a0 x3 : 00000000000e7e40
x2 : 0000000000002710 x1 : ffffffffffffd8f0 x0 : 0000000000000001
Call trace:
 rcu_do_batch kernel/rcu/tree.c:2592 [inline]
 rcu_core+0x4d4/0x590 kernel/rcu/tree.c:2786
 rcu_core_si+0x10/0x20 kernel/rcu/tree.c:2803
 _stext+0x124/0x2a0
 run_ksoftirqd+0x4c/0x60 kernel/softirq.c:921
 smpboot_thread_fn+0x23c/0x270 kernel/smpboot.c:164
 kthread+0x108/0x10c kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:867
---[ end trace 0000000000000000 ]---

Crashes (9):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/04/01 16:01 upstream e8b767f5e040 b183f420 .config console log report info ci-qemu2-arm64-mte BUG: scheduling while atomic in simple_recursive_removal
2022/04/01 13:50 upstream e8b767f5e040 b183f420 .config console log report info ci-qemu2-arm64-mte BUG: scheduling while atomic in simple_recursive_removal
2022/03/30 23:11 upstream 74164d284b29 9d49f3a7 .config console log report info ci-qemu2-arm64-mte BUG: scheduling while atomic in simple_recursive_removal
2022/03/30 11:05 upstream d888c83fcec7 42718dd6 .config console log report info ci-qemu2-arm64-mte BUG: scheduling while atomic in simple_recursive_removal
2022/03/30 08:49 upstream d888c83fcec7 6bdac766 .config console log report info ci-qemu2-arm64-mte BUG: scheduling while atomic in simple_recursive_removal
2022/03/30 06:53 upstream 1930a6e739c4 6bdac766 .config console log report info ci-qemu2-arm32 BUG: scheduling while atomic in simple_recursive_removal
2022/03/30 03:55 upstream 1930a6e739c4 6bdac766 .config console log report info ci-qemu2-arm64-mte BUG: scheduling while atomic in simple_recursive_removal
2022/03/29 00:24 upstream cffb2b72d3ed 6bdac766 .config console log report info ci-qemu2-arm64-mte BUG: scheduling while atomic in simple_recursive_removal
2022/03/28 22:49 upstream cffb2b72d3ed 6bdac766 .config console log report info ci-qemu2-arm32 BUG: scheduling while atomic in simple_recursive_removal
* Struck through repros no longer work on HEAD.