rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (1 GPs behind) idle=819/1/0x4000000000000002 softirq=28054/28066 fqs=5248 
	(detected by 1, t=10502 jiffies, g=31789, q=14670)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 13387 Comm: syz.3.3492 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:__sanitizer_cov_trace_pc+0x58/0x60 kernel/kcov.c:216
Code: 10 16 00 00 83 fa 02 75 21 48 8b 91 18 16 00 00 48 8b 32 48 8d 7e 01 8b 89 14 16 00 00 48 39 cf 73 08 48 89 44 f2 08 48 89 3a <c3> 0f 1f 80 00 00 00 00 48 8b 04 24 65 48 8b 0d 34 ab 8a 7e 65 8b
RSP: 0000:ffffc9000ca0efd8 EFLAGS: 00000093
RAX: ffffffff817f8cc5 RBX: 0000000000000014 RCX: ffff888074a59dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000008
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed101720765a
R10: ffffed101720765a R11: 1ffff11017207659 R12: 0000000000000000
R13: 0000000000000000 R14: ffffc9000ca0f080 R15: 0000000000000000
FS:  000055558523a500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3285ffff CR3: 000000005bc61000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 perf_trace_buf_alloc+0xd5/0x300 kernel/trace/trace_event_perf.c:419
 perf_trace_preemptirq_template+0x178/0x380 include/trace/events/preemptirq.h:14
 trace_irq_enable_rcuidle+0x108/0x180 include/trace/events/preemptirq.h:40
 trace_hardirqs_on+0x57/0x80 kernel/trace/trace_preemptirq.c:44
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713
RIP: 0010:rcu_read_unlock_special+0x84/0x480 kernel/rcu/tree_plugin.h:671
Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 7d 16 9e 7e 41 f7 c6 00 00 f0 00 74 45 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b
RSP: 0000:ffffc9000ca0f200 EFLAGS: 00000206
RAX: 35affe0207573b00 RBX: 1ffff92001941e44 RCX: 35affe0207573b00
RDX: dffffc0000000000 RSI: ffffffff8a0b15c0 RDI: ffffffff8a599340
RBP: ffffc9000ca0f2e0 R08: dffffc0000000000 R09: fffffbfff1ff6e36
R10: fffffbfff1ff6e36 R11: 1ffffffff1ff6e35 R12: ffffffff8c120800
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422
 rcu_read_unlock include/linux/rcupdate.h:771 [inline]
 mod_objcg_mlstate+0x225/0x2d0 mm/memcontrol.c:832
 drain_obj_stock+0x159/0x370 mm/memcontrol.c:3197
 refill_obj_stock+0x121/0x440 mm/memcontrol.c:3242
 memcg_slab_free_hook+0x157/0x1f0 mm/slab.h:364
 do_slab_free mm/slub.c:3432 [inline]
 ___cache_free+0x63/0x120 mm/slub.c:3506
 qlist_free_all+0x35/0x90 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x150/0x160 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x2f/0xd0 mm/kasan/common.c:444
 kasan_slab_alloc include/linux/kasan.h:254 [inline]
 slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519
 slab_alloc_node mm/slub.c:3220 [inline]
 slab_alloc mm/slub.c:3228 [inline]
 kmem_cache_alloc+0x100/0x290 mm/slub.c:3233
 kmem_cache_zalloc include/linux/slab.h:725 [inline]
 jbd2_alloc_handle include/linux/jbd2.h:1597 [inline]
 new_handle fs/jbd2/transaction.c:477 [inline]
 jbd2__journal_start+0x13c/0x5a0 fs/jbd2/transaction.c:504
 __ext4_journal_start_sb+0x167/0x360 fs/ext4/ext4_jbd2.c:105
 __ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
 ext4_dirty_inode+0x8b/0x100 fs/ext4/inode.c:6037
 __mark_inode_dirty+0x2b0/0xc60 fs/fs-writeback.c:2464
 generic_update_time+0x1cd/0x1f0 fs/inode.c:1881
 inode_update_time fs/inode.c:1894 [inline]
 file_update_time+0x38b/0x400 fs/inode.c:2083
 ext4_page_mkwrite+0x1b4/0x1240 fs/ext4/inode.c:6158
 do_page_mkwrite+0x168/0x3c0 mm/memory.c:2922
 do_shared_fault mm/memory.c:4328 [inline]
 do_fault mm/memory.c:4396 [inline]
 handle_pte_fault mm/memory.c:4650 [inline]
 __handle_mm_fault mm/memory.c:4785 [inline]
 handle_mm_fault+0x1d4b/0x43c0 mm/memory.c:4883
 do_user_addr_fault+0x489/0xc80 arch/x86/mm/fault.c:1357
 handle_page_fault arch/x86/mm/fault.c:1445 [inline]
 exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1501
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606
RIP: 0033:0x7f88baa61db1
Code: 85 5a ff ff 48 8b 05 c6 49 e8 00 0f b6 4c 24 10 be 08 00 00 00 48 89 df 83 05 a2 49 e8 00 01 48 8d 50 ff 48 89 15 a7 49 e8 00 <88> 48 ff 8b 2d 8e 49 e8 00 e8 51 5a ff ff 48 8b 05 9a 49 e8 00 41
RSP: 002b:00007fff1043be10 EFLAGS: 00010202
RAX: 0000001b32860000 RBX: 00007f88bb8e6720 RCX: 0000000000000003
RDX: 0000001b3285ffff RSI: 0000000000000008 RDI: 00007f88bb8e6720
RBP: 00007f88badb7038 R08: 0000000000000000 R09: 0000000000000000
R10: 00007f88bb8e6700 R11: 0000000000000001 R12: 0000000000000003
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>