last executing test programs:
kernel console output (not intermixed with test programs):
Warning: Permanently added '[localhost]:23769' (ED25519) to the list of known hosts.
[ 47.542948][ T5869] cgroup: Unknown subsys name 'net'
[ 47.674571][ T5869] cgroup: Unknown subsys name 'cpuset'
[ 47.679412][ T5869] cgroup: Unknown subsys name 'rlimit'
[ 47.682809][ T5904] BUG: sleeping function called from invalid context at mm/shmem.c:1150
[ 47.686251][ T5904] in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 5904, name: rm
[ 47.688960][ T5904] preempt_count: 0, expected: 0
[ 47.690709][ T5904] RCU nest depth: 1, expected: 0
[ 47.694614][ T5904] 2 locks held by rm/5904:
[ 47.696410][ T5904] #0: ffff88802b0d0410 (sb_writers#5){.+.+}-{0:0}, at: filename_unlinkat+0x1ad/0x730
[ 47.699498][ T5904] #1: ffffffff8e7e5260 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire.constprop.0+0x7/0x30
[ 47.703246][ T5904] CPU: 1 UID: 0 PID: 5904 Comm: rm Not tainted syzkaller #0 PREEMPT(full)
[ 47.703259][ T5904] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 47.703292][ T5904] Call Trace:
[ 47.703310][ T5904]
[ 47.703314][ T5904] dump_stack_lvl+0x100/0x190
[ 47.703328][ T5904] __might_resched.cold+0x1ec/0x232
[ 47.703344][ T5904] ? __pfx___might_resched+0x10/0x10
[ 47.703360][ T5904] shmem_undo_range+0x447/0x1570
[ 47.703376][ T5904] ? __pfx_shmem_undo_range+0x10/0x10
[ 47.703399][ T5904] ? unwind_get_return_address+0x59/0xa0
[ 47.703414][ T5904] ? arch_stack_walk+0xa6/0xf0
[ 47.703438][ T5904] ? kasan_save_stack+0x3f/0x50
[ 47.703449][ T5904] ? kasan_save_stack+0x30/0x50
[ 47.703457][ T5904] ? kasan_record_aux_stack+0xa7/0xc0
[ 47.703471][ T5904] ? __call_rcu_common.constprop.0+0xa5/0x9b0
[ 47.703482][ T5904] ? dentry_free+0xbc/0x170
[ 47.703495][ T5904] ? __dentry_kill+0x4c6/0x690
[ 47.703509][ T5904] ? dput.part.0+0x456/0x570
[ 47.703527][ T5904] shmem_evict_inode+0x3f3/0xc40
[ 47.703538][ T5904] ? inode_wait_for_writeback+0x171/0x390
[ 47.703550][ T5904] ? __pfx_shmem_evict_inode+0x10/0x10
[ 47.703561][ T5904] ? __pfx_inode_wait_for_writeback+0x10/0x10
[ 47.703573][ T5904] ? find_held_lock+0x2b/0x80
[ 47.703586][ T5904] ? evict+0x37e/0xad0
[ 47.703600][ T5904] ? evict+0x37e/0xad0
[ 47.703615][ T5904] ? __pfx_shmem_evict_inode+0x10/0x10
[ 47.703625][ T5904] evict+0x3c2/0xad0
[ 47.703640][ T5904] ? __pfx_evict+0x10/0x10
[ 47.703657][ T5904] ? iput.part.0+0x5fd/0xf50
[ 47.703674][ T5904] iput.part.0+0x605/0xf50
[ 47.703687][ T5904] ? __pfx_inode_just_drop+0x10/0x10
[ 47.703700][ T5904] iput+0x35/0x40
[ 47.703714][ T5904] filename_unlinkat+0x466/0x730
[ 47.703729][ T5904] ? __pfx_filename_unlinkat+0x10/0x10
[ 47.703747][ T5904] ? do_getname+0x191/0x390
[ 47.703764][ T5904] __x64_sys_unlink+0x46/0x70
[ 47.703778][ T5904] do_syscall_64+0x10b/0xf80
[ 47.703794][ T5904] ? clear_bhb_loop+0x40/0x90
[ 47.703807][ T5904] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 47.703818][ T5904] RIP: 0033:0x7eff00dbe937
[ 47.703828][ T5904] Code: 00 00 e9 a9 fd ff ff 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 5f 00 00 00 0f 05 c3 0f 1f 84 00 00 00 00 00 b8 57 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 8b 15 91 b4 0d 00 f7 d8 64 89 02 b8
[ 47.703838][ T5904] RSP: 002b:00007ffef2c377b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
[ 47.703849][ T5904] RAX: ffffffffffffffda RBX: 00007ffef2c37dd7 RCX: 00007eff00dbe937
[ 47.703855][ T5904] RDX: 00007ffef2c377c8 RSI: 00007ffef2c37dd7 RDI: 00007ffef2c37dd7
[ 47.703861][ T5904] RBP: 0000000000000008 R08: 00007ffef2c37dc0 R09: 0000000000000000
[ 47.703867][ T5904] R10: 0000000000000100 R11: 0000000000000246 R12: 0000000000000000
[ 47.703873][ T5904] R13: 00007eff00f4e9cc R14: 00007eff00faa000 R15: 000055fe0234bd98
[ 47.703886][ T5904]
[ 47.703966][ T5904]
[ 47.795133][ T5904] ================================================
[ 47.797348][ T5904] WARNING: lock held when returning to user space!
[ 47.799584][ T5904] syzkaller #0 Tainted: G W
[ 47.801612][ T5904] ------------------------------------------------
[ 47.803666][ T5904] rm/5904 is leaving the kernel with locks still held!
[ 47.805827][ T5904] 1 lock held by rm/5904:
[ 47.807183][ T5904] #0: ffffffff8e7e5260 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire.constprop.0+0x7/0x30
[ 47.810839][ T5904] ------------[ cut here ]------------
[ 47.813288][ T5904] Voluntary context switch within RCU read-side critical section!
[ 47.813297][ T5904] WARNING: kernel/rcu/tree_plugin.h:332 at rcu_note_context_switch+0x859/0x19c0, CPU#1: rm/5904
[ 47.819665][ T5904] Modules linked in:
[ 47.820982][ T5904] CPU: 1 UID: 0 PID: 5904 Comm: rm Tainted: G W syzkaller #0 PREEMPT(full)
[ 47.824447][ T5904] Tainted: [W]=WARN
[ 47.825774][ T5904] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 47.829022][ T5904] RIP: 0010:rcu_note_context_switch+0x859/0x19c0
[ 47.831022][ T5904] Code: c1 ea 03 80 3c 02 00 0f 85 9b 0b 00 00 48 8b 53 28 b9 01 00 00 00 4c 89 ef e8 a3 cf fe ff e9 1d f9 ff ff 48 8d 3d b7 5e f1 0e <67> 48 0f b9 3a e9 99 f8 ff ff 48 b8 00 00 00 00 00 fc ff df 48 8d
[ 47.837298][ T5904] RSP: 0000:ffffc9000407fcf0 EFLAGS: 00010002
[ 47.839240][ T5904] RAX: 0000000000000001 RBX: ffff88802b33c3c0 RCX: ffffffff81ee0fc1
[ 47.841823][ T5904] RDX: 0000000000000000 RSI: ffffffff8c1c1000 RDI: ffffffff90dfe2a0
[ 47.844397][ T5904] RBP: ffff8880267b2500 R08: 0000000000000000 R09: fffffbfff21b89ca
[ 47.847044][ T5904] R10: ffffffff90dc4e57 R11: ffffffff94142590 R12: 0000000000000000
[ 47.849572][ T5904] R13: ffff8880267b29c4 R14: ffff88802b33b380 R15: ffffffff90dc81c4
[ 47.852105][ T5904] FS: 00007eff00c00c80(0000) GS:ffff8880971e2000(0000) knlGS:0000000000000000
[ 47.854957][ T5904] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 47.857221][ T5904] CR2: 00007eff00da0850 CR3: 000000004cf7d000 CR4: 0000000000352ef0
[ 47.859849][ T5904] Call Trace:
[ 47.860950][ T5904]
[ 47.861844][ T5904] ? sched_balance_domains+0x2c6/0xb80
[ 47.863638][ T5904] ? lock_release+0x245/0x310
[ 47.865165][ T5904] ? __schedule+0x32d5/0x6820
[ 47.866800][ T5904] ? rcu_is_watching+0x12/0xc0
[ 47.868542][ T5904] ? schedule+0xdd/0x390
[ 47.870083][ T5904] __schedule+0x276/0x6820
[ 47.871627][ T5904] ? __pfx_sched_clock_cpu+0x10/0x10
[ 47.873328][ T5904] ? __pfx_sched_balance_domains+0x10/0x10
[ 47.875252][ T5904] ? irqtime_account_irq+0xc9/0x2d0
[ 47.877370][ T5904] ? trace_hardirqs_off+0x74/0x180
[ 47.879629][ T5904] ? __pfx___schedule+0x10/0x10
[ 47.881644][ T5904] ? trace_irq_enable.constprop.0+0x31/0x160
[ 47.883592][ T5904] schedule+0xdd/0x390
[ 47.884919][ T5904] irqentry_exit+0x359/0x790
[ 47.886441][ T5904] asm_sysvec_apic_timer_interrupt+0x1a/0x20
[ 47.888353][ T5904] RIP: 0033:0x7eff00dbe937
[ 47.890036][ T5904] Code: 00 00 e9 a9 fd ff ff 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 5f 00 00 00 0f 05 c3 0f 1f 84 00 00 00 00 00 b8 57 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 8b 15 91 b4 0d 00 f7 d8 64 89 02 b8
[ 47.896357][ T5904] RSP: 002b:00007ffef2c377b8 EFLAGS: 00000246
[ 47.898309][ T5904] RAX: 0000000000000000 RBX: 00007ffef2c37dd7 RCX: 00007eff00dbe937
[ 47.900994][ T5904] RDX: 00007ffef2c377c8 RSI: 00007ffef2c37dd7 RDI: 00007ffef2c37dd7
[ 47.903625][ T5904] RBP: 0000000000000008 R08: 00007ffef2c37dc0 R09: 0000000000000000
[ 47.906173][ T5904] R10: 0000000000000100 R11: 0000000000000246 R12: 0000000000000000
[ 47.908712][ T5904] R13: 00007eff00f4e9cc R14: 00007eff00faa000 R15: 000055fe0234bd98
[ 47.911379][ T5904]
[ 47.912448][ T5904] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 47.914810][ T5904] CPU: 1 UID: 0 PID: 5904 Comm: rm Tainted: G W syzkaller #0 PREEMPT(full)
[ 47.918028][ T5904] Tainted: [W]=WARN
[ 47.919327][ T5904] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 47.922834][ T5904] Call Trace:
[ 47.923951][ T5904]
[ 47.924924][ T5904] dump_stack_lvl+0x100/0x190
[ 47.926471][ T5904] vpanic+0x552/0x970
[ 47.927755][ T5904] ? __pfx_vpanic+0x10/0x10
[ 47.929221][ T5904] ? lock_release+0x245/0x310
[ 47.930785][ T5904] panic+0xd1/0xe0
[ 47.932039][ T5904] ? __pfx_panic+0x10/0x10
[ 47.933575][ T5904] ? check_panic_on_warn+0x1f/0x90
[ 47.935385][ T5904] check_panic_on_warn.cold+0x19/0x34
[ 47.937401][ T5904] ? rcu_note_context_switch+0x859/0x19c0
[ 47.939240][ T5904] __warn.cold+0x191/0x328
[ 47.940671][ T5904] __report_bug+0x296/0x3d0
[ 47.942121][ T5904] ? rcu_note_context_switch+0x859/0x19c0
[ 47.943937][ T5904] ? __pfx___report_bug+0x10/0x10
[ 47.945591][ T5904] ? trace_rcu_utilization+0x31/0x240
[ 47.947445][ T5904] report_bug_entry+0xe1/0x290
[ 47.949179][ T5904] ? rcu_note_context_switch+0x859/0x19c0
[ 47.951187][ T5904] handle_bug+0x1cd/0x2a0
[ 47.952607][ T5904] exc_invalid_op+0x17/0x50
[ 47.954068][ T5904] asm_exc_invalid_op+0x1a/0x20
[ 47.955622][ T5904] RIP: 0010:rcu_note_context_switch+0x859/0x19c0
[ 47.957672][ T5904] Code: c1 ea 03 80 3c 02 00 0f 85 9b 0b 00 00 48 8b 53 28 b9 01 00 00 00 4c 89 ef e8 a3 cf fe ff e9 1d f9 ff ff 48 8d 3d b7 5e f1 0e <67> 48 0f b9 3a e9 99 f8 ff ff 48 b8 00 00 00 00 00 fc ff df 48 8d
[ 47.964097][ T5904] RSP: 0000:ffffc9000407fcf0 EFLAGS: 00010002
[ 47.966215][ T5904] RAX: 0000000000000001 RBX: ffff88802b33c3c0 RCX: ffffffff81ee0fc1
[ 47.968741][ T5904] RDX: 0000000000000000 RSI: ffffffff8c1c1000 RDI: ffffffff90dfe2a0
[ 47.971242][ T5904] RBP: ffff8880267b2500 R08: 0000000000000000 R09: fffffbfff21b89ca
[ 47.973873][ T5904] R10: ffffffff90dc4e57 R11: ffffffff94142590 R12: 0000000000000000
[ 47.976779][ T5904] R13: ffff8880267b29c4 R14: ffff88802b33b380 R15: ffffffff90dc81c4
[ 47.979435][ T5904] ? trace_rcu_utilization+0x31/0x240
[ 47.981177][ T5904] ? sched_balance_domains+0x2c6/0xb80
[ 47.983014][ T5904] ? lock_release+0x245/0x310
[ 47.984582][ T5904] ? __schedule+0x32d5/0x6820
[ 47.986191][ T5904] ? rcu_is_watching+0x12/0xc0
[ 47.987749][ T5904] ? schedule+0xdd/0x390
[ 47.989182][ T5904] __schedule+0x276/0x6820
[ 47.990690][ T5904] ? __pfx_sched_clock_cpu+0x10/0x10
[ 47.992473][ T5904] ? __pfx_sched_balance_domains+0x10/0x10
[ 47.994408][ T5904] ? irqtime_account_irq+0xc9/0x2d0
[ 47.996171][ T5904] ? trace_hardirqs_off+0x74/0x180
[ 47.997834][ T5904] ? __pfx___schedule+0x10/0x10
[ 47.999442][ T5904] ? trace_irq_enable.constprop.0+0x31/0x160
[ 48.001454][ T5904] schedule+0xdd/0x390
[ 48.002817][ T5904] irqentry_exit+0x359/0x790
[ 48.004588][ T5904] asm_sysvec_apic_timer_interrupt+0x1a/0x20
[ 48.007017][ T5904] RIP: 0033:0x7eff00dbe937
[ 48.008857][ T5904] Code: 00 00 e9 a9 fd ff ff 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 5f 00 00 00 0f 05 c3 0f 1f 84 00 00 00 00 00 b8 57 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 8b 15 91 b4 0d 00 f7 d8 64 89 02 b8
[ 48.016623][ T5904] RSP: 002b:00007ffef2c377b8 EFLAGS: 00000246
[ 48.019065][ T5904] RAX: 0000000000000000 RBX: 00007ffef2c37dd7 RCX: 00007eff00dbe937
[ 48.022450][ T5904] RDX: 00007ffef2c377c8 RSI: 00007ffef2c37dd7 RDI: 00007ffef2c37dd7
[ 48.025807][ T5904] RBP: 0000000000000008 R08: 00007ffef2c37dc0 R09: 0000000000000000
[ 48.028908][ T5904] R10: 0000000000000100 R11: 0000000000000246 R12: 0000000000000000
[ 48.032030][ T5904] R13: 00007eff00f4e9cc R14: 00007eff00faa000 R15: 000055fe0234bd98
[ 48.035398][ T5904]
[ 48.037597][ T5904] Kernel Offset: disabled
[ 48.039338][ T5904] Rebooting in 86400 seconds..