BUG: sleeping function ca[ 92.150581][ T5155] BUG: sleeping function called from invalid context at fs/jbd2/commit.c:1071
in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 5155, name: jbd2/sda1-8
preempt_count: 0, expected: 0
RCU nest depth: 2, expected: 1
3 locks held by jbd2/sda1-8/5155:
#0: ffffffff8dfc80c0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#0: ffffffff8dfc80c0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff8dfc80c0 (rcu_read_lock){....}-{1:3}, at: __rt_spin_lock kernel/locking/spinlock_rt.c:50 [inline]
#0: ffffffff8dfc80c0 (rcu_read_lock){....}-{1:3}, at: rt_spin_lock+0x1e0/0x400 kernel/locking/spinlock_rt.c:57
#1: ffff888036ea4920 (&journal->j_list_lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock_rt.h:45 [inline]
#1: ffff888036ea4920 (&journal->j_list_lock){+.+.}-{3:3}, at: jbd2_journal_commit_transaction+0x3ad1/0x5b20 fs/jbd2/commit.c:993
#2: ffffffff8dfc80c0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#2: ffffffff8dfc80c0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#2: ffffffff8dfc80c0 (rcu_read_lock){....}-{1:3}, at: __rt_spin_lock kernel/locking/spinlock_rt.c:50 [inline]
#2: ffffffff8dfc80c0 (rcu_read_lock){....}-{1:3}, at: rt_spin_lock+0x1e0/0x400 kernel/locking/spinlock_rt.c:57
CPU: 0 UID: 0 PID: 5155 Comm: jbd2/sda1-8 Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Call Trace:
<TASK>
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
__might_resched+0x329/0x480 kernel/sched/core.c:9162
jbd2_journal_commit_transaction+0x3f59/0x5b20 fs/jbd2/commit.c:1071
kjournald2+0x3e0/0x760 fs/jbd2/journal.c:201
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
------------[ cut here ]------------
Voluntary context switch within RCU read-side critical section!
WARNING: kernel/rcu/tree_plugin.h:332 at rcu_note_context_switch+0xcac/0xf40 kernel/rcu/tree_plugin.h:332, CPU#0: jbd2/sda1-8/5155
Modules linked in:
CPU: 0 UID: 0 PID: 5155 Comm: jbd2/sda1-8 Tainted: G W syzkaller #0 PREEMPT_{RT,(full)}
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:rcu_note_context_switch+0xcac/0xf40 kernel/rcu/tree_plugin.h:332
Code: 00 41 c6 45 00 00 48 8b 3d a1 20 e1 0d 48 81 c4 b8 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d e9 bb 5f ff ff 48 8d 3d a4 e2 e4 0d <67> 48 0f b9 3a e9 1b f4 ff ff 90 0f 0b 90 45 84 e4 0f 84 ea f3 ff
RSP: 0018:ffffc90010177930 EFLAGS: 00010002
RAX: 0000000000000000 RBX: ffff888036ec5c40 RCX: 0000000080000002
RDX: 0000000000000000 RSI: ffffffff8ba74040 RDI: ffffffff8f8f3dd0
RBP: dffffc0000000000 R08: ffffffff8f8bcef7 R09: 1ffffffff1f179de
R10: dffffc0000000000 R11: fffffbfff1f179df R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8880b883c800 R15: ffff888036ec6104
FS: 0000000000000000(0000) GS:ffff8881260fb000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557df50340 CR3: 0000000011b24000 CR4: 00000000003526f0
Call Trace:
<TASK>
__schedule+0x291/0x54c0 kernel/sched/core.c:7043
__schedule_loop kernel/sched/core.c:7267 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7282
kjournald2+0x410/0x760 fs/jbd2/journal.c:230
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
----------------
Code disassembly (best guess):
0: 00 41 c6 add %al,-0x3a(%rcx)
3: 45 00 00 add %r8b,(%r8)
6: 48 8b 3d a1 20 e1 0d mov 0xde120a1(%rip),%rdi # 0xde120ae
d: 48 81 c4 b8 00 00 00 add $0xb8,%rsp
14: 5b pop %rbx
15: 41 5c pop %r12
17: 41 5d pop %r13
19: 41 5e pop %r14
1b: 41 5f pop %r15
1d: 5d pop %rbp
1e: e9 bb 5f ff ff jmp 0xffff5fde
23: 48 8d 3d a4 e2 e4 0d lea 0xde4e2a4(%rip),%rdi # 0xde4e2ce
* 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction
2f: e9 1b f4 ff ff jmp 0xfffff44f
34: 90 nop
35: 0f 0b ud2
37: 90 nop
38: 45 84 e4 test %r12b,%r12b
3b: 0f .byte 0xf
3c: 84 ea test %ch,%dl
3e: f3 repz
3f: ff .byte 0xff