sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
========================================================
WARNING: possible irq lock inversion dependency detected
6.4.0-rc7-next-20230623 #1 Not tainted
--------------------------------------------------------
syz-executor.6/6256 just changed the state of lock:
ffffffff85815818 (blkg_stat_lock){+.-.}-{2:2}, at: __blkcg_rstat_flush.isra.0+0x11f/0x4e0
but this lock was taken by another, HARDIRQ-safe lock in the past:
(per_cpu_ptr(&cgroup_rstat_cpu_lock, cpu)){-.-.}-{2:2}
and interrupts could create inverse lock ordering between them.
other info that might help us debug this:
Possible interrupt unsafe locking scenario:
CPU0 CPU1
---- ----
lock(blkg_stat_lock);
local_irq_disable();
lock(per_cpu_ptr(&cgroup_rstat_cpu_lock, cpu));
lock(blkg_stat_lock);
<Interrupt>
lock(per_cpu_ptr(&cgroup_rstat_cpu_lock, cpu));
*** DEADLOCK ***
5 locks held by syz-executor.6/6256:
#0: ffffffff87b85530 (&pmus_srcu){.+.+}-{0:0}, at: perf_event_alloc.part.0+0xcd2/0x3a30
#1: ffffffff85653808 (kprobe_mutex){+.+.}-{3:3}, at: register_kprobe+0x327/0x1580
#2: ffffffff854e2d50 (cpu_hotplug_lock){++++}-{0:0}, at: register_kprobe+0xba9/0x1580
#3: ffffffff8560b5a0 (rcu_callback){....}-{0:0}, at: rcu_core+0x83e/0x28b0
#4: ffffffff8560b6c0 (rcu_read_lock){....}-{1:2}, at: __blkcg_rstat_flush.isra.0+0x93/0x4e0
the shortest dependencies between 2nd lock and 1st lock:
-> (per_cpu_ptr(&cgroup_rstat_cpu_lock, cpu)){-.-.}-{2:2} {
IN-HARDIRQ-W at:
lock_acquire+0x19a/0x4c0
_raw_spin_lock_irqsave+0x3a/0x60
cgroup_rstat_updated+0xcb/0x2e0
__cgroup_account_cputime_field+0xa0/0x120
account_system_index_time+0x199/0x2c0
update_process_times+0x26/0x150
tick_sched_handle+0x8e/0x170
tick_sched_timer+0xe6/0x110
__hrtimer_run_queues+0x17f/0xb60
hrtimer_interrupt+0x2ef/0x750
__sysvec_apic_timer_interrupt+0xff/0x380
sysvec_apic_timer_interrupt+0x69/0x90
asm_sysvec_apic_timer_interrupt+0x1a/0x20
_raw_spin_unlock_irqrestore+0x34/0x50
__wake_up_common_lock+0xe5/0x140
d_splice_alias+0x4c3/0xe30
kernfs_iop_lookup+0x283/0x330
lookup_open.isra.0+0x745/0x1400
path_openat+0x96c/0x2710
do_filp_open+0x1ba/0x410
do_sys_openat2+0x164/0x1d0
__x64_sys_openat+0x143/0x200
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x6e/0xd8
IN-SOFTIRQ-W at:
lock_acquire+0x19a/0x4c0
_raw_spin_lock_irqsave+0x3a/0x60
cgroup_rstat_updated+0xcb/0x2e0
__mod_memcg_state+0x86/0x160
memcg_account_kmem+0x38/0x70
refill_obj_stock+0x35f/0x5c0
kmem_cache_free+0x444/0x4d0
file_free_rcu+0xb5/0x100
rcu_core+0x8c8/0x28b0
__do_softirq+0x1b7/0x7d4
irq_exit_rcu+0x93/0xc0
sysvec_apic_timer_interrupt+0x6e/0x90
asm_sysvec_apic_timer_interrupt+0x1a/0x20
unwind_next_frame+0x1aa/0x2490
arch_stack_walk+0x87/0xf0
stack_trace_save+0x90/0xd0
kasan_save_stack+0x22/0x50
__kasan_record_aux_stack+0x8e/0xa0
__call_rcu_common.constprop.0+0x6a/0xbd0
kmem_cache_free+0xc1/0x4d0
mt_destroy_walk+0xb1/0x1200
__mt_destroy+0x220/0x290
do_vmi_align_munmap+0xfb9/0x12e0
do_vmi_munmap+0x1f1/0x2b0
mmap_region+0x1fe/0x26c0
do_mmap+0x833/0xea0
vm_mmap_pgoff+0x1a8/0x3b0
ksys_mmap_pgoff+0x3af/0x500
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x6e/0xd8
INITIAL USE at:
lock_acquire+0x19a/0x4c0
_raw_spin_lock_irqsave+0x3a/0x60
cgroup_rstat_flush_locked+0x131/0xd80
cgroup_rstat_flush+0x37/0x50
do_flush_stats+0x97/0xf0
flush_memcg_stats_dwork+0x9/0x50
process_one_work+0xabf/0x1770
worker_thread+0x64f/0x12a0
kthread+0x33f/0x440
ret_from_fork+0x2c/0x50
}
... key at: [<ffffffff87b7e760>] __key.0+0x0/0x40
... acquired at:
_raw_spin_lock+0x2b/0x40
__blkcg_rstat_flush.isra.0+0x11f/0x4e0
blkcg_rstat_flush+0x87/0xb0
cgroup_rstat_flush_locked+0x706/0xd80
cgroup_rstat_flush+0x37/0x50
do_flush_stats+0x97/0xf0
flush_memcg_stats_dwork+0x9/0x50
process_one_work+0xabf/0x1770
worker_thread+0x64f/0x12a0
kthread+0x33f/0x440
ret_from_fork+0x2c/0x50
-> (blkg_stat_lock){+.-.}-{2:2} {
HARDIRQ-ON-W at:
lock_acquire+0x19a/0x4c0
_raw_spin_lock+0x2b/0x40
__blkcg_rstat_flush.isra.0+0x11f/0x4e0
__blkg_release+0xfa/0x3b0
rcu_core+0x8c8/0x28b0
__do_softirq+0x1b7/0x7d4
irq_exit_rcu+0x93/0xc0
sysvec_apic_timer_interrupt+0x6e/0x90
asm_sysvec_apic_timer_interrupt+0x1a/0x20
_raw_spin_unlock_irqrestore+0x34/0x50
try_to_wake_up+0x64b/0x1b30
wake_up_q+0x82/0xf0
__mutex_unlock_slowpath+0x20b/0x5e0
register_kprobe+0xc3e/0x1580
__register_trace_kprobe+0x26a/0x2d0
create_local_trace_kprobe+0x1ea/0x3d0
perf_kprobe_init+0x119/0x210
perf_kprobe_event_init+0xfc/0x1d0
perf_try_init_event+0x130/0x570
perf_event_alloc.part.0+0xf84/0x3a30
__do_sys_perf_event_open+0x4d9/0x2a60
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x6e/0xd8
IN-SOFTIRQ-W at:
lock_acquire+0x19a/0x4c0
_raw_spin_lock+0x2b/0x40
__blkcg_rstat_flush.isra.0+0x11f/0x4e0
__blkg_release+0xfa/0x3b0
rcu_core+0x8c8/0x28b0
__do_softirq+0x1b7/0x7d4
irq_exit_rcu+0x93/0xc0
sysvec_apic_timer_interrupt+0x6e/0x90
asm_sysvec_apic_timer_interrupt+0x1a/0x20
_raw_spin_unlock_irqrestore+0x34/0x50
try_to_wake_up+0x64b/0x1b30
wake_up_q+0x82/0xf0
__mutex_unlock_slowpath+0x20b/0x5e0
register_kprobe+0xc3e/0x1580
__register_trace_kprobe+0x26a/0x2d0
create_local_trace_kprobe+0x1ea/0x3d0
perf_kprobe_init+0x119/0x210
perf_kprobe_event_init+0xfc/0x1d0
perf_try_init_event+0x130/0x570
perf_event_alloc.part.0+0xf84/0x3a30
__do_sys_perf_event_open+0x4d9/0x2a60
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x6e/0xd8
INITIAL USE at:
lock_acquire+0x19a/0x4c0
_raw_spin_lock+0x2b/0x40
__blkcg_rstat_flush.isra.0+0x11f/0x4e0
blkcg_rstat_flush+0x87/0xb0
cgroup_rstat_flush_locked+0x706/0xd80
cgroup_rstat_flush+0x37/0x50
do_flush_stats+0x97/0xf0
flush_memcg_stats_dwork+0x9/0x50
process_one_work+0xabf/0x1770
worker_thread+0x64f/0x12a0
kthread+0x33f/0x440
ret_from_fork+0x2c/0x50
}
... key at: [<ffffffff85815818>] blkg_stat_lock+0x18/0x60
... acquired at:
__lock_acquire+0x8b8/0x6340
lock_acquire+0x19a/0x4c0
_raw_spin_lock+0x2b/0x40
__blkcg_rstat_flush.isra.0+0x11f/0x4e0
__blkg_release+0xfa/0x3b0
rcu_core+0x8c8/0x28b0
__do_softirq+0x1b7/0x7d4
irq_exit_rcu+0x93/0xc0
sysvec_apic_timer_interrupt+0x6e/0x90
asm_sysvec_apic_timer_interrupt+0x1a/0x20
_raw_spin_unlock_irqrestore+0x34/0x50
try_to_wake_up+0x64b/0x1b30
wake_up_q+0x82/0xf0
__mutex_unlock_slowpath+0x20b/0x5e0
register_kprobe+0xc3e/0x1580
__register_trace_kprobe+0x26a/0x2d0
create_local_trace_kprobe+0x1ea/0x3d0
perf_kprobe_init+0x119/0x210
perf_kprobe_event_init+0xfc/0x1d0
perf_try_init_event+0x130/0x570
perf_event_alloc.part.0+0xf84/0x3a30
__do_sys_perf_event_open+0x4d9/0x2a60
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x6e/0xd8
stack backtrace:
CPU: 0 PID: 6256 Comm: syz-executor.6 Not tainted 6.4.0-rc7-next-20230623 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
<IRQ>
dump_stack_lvl+0x91/0xf0
print_irq_inversion_bug.part.0+0x3d5/0x570
mark_lock.part.0+0x900/0x2f50
__lock_acquire+0x8b8/0x6340
lock_acquire+0x19a/0x4c0
_raw_spin_lock+0x2b/0x40
__blkcg_rstat_flush.isra.0+0x11f/0x4e0
__blkg_release+0xfa/0x3b0
rcu_core+0x8c8/0x28b0
__do_softirq+0x1b7/0x7d4
irq_exit_rcu+0x93/0xc0
sysvec_apic_timer_interrupt+0x6e/0x90
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:_raw_spin_unlock_irqrestore+0x34/0x50
Code: c7 18 53 48 89 f3 48 8b 74 24 10 e8 c6 db d8 fc 48 89 ef e8 8e 59 d9 fc 80 e7 02 74 06 e8 44 b5 fe fc fb 65 ff 0d 34 a4 ae 7b <74> 07 5b 5d e9 23 2a 00 00 0f 1f 44 00 00 5b 5d e9 17 2a 00 00 0f
RSP: 0018:ffff888013e7f8e8 EFLAGS: 00000202
RAX: 000000000000076b RBX: 0000000000000283 RCX: ffffffff812d1fbf
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8454e68c
RBP: ffff888017afa450 R08: 0000000000000001 R09: fffffbfff0ef9b60
R10: ffffffff877cdb07 R11: 0000000000000001 R12: 0000000000000283
R13: ffff888017afa450 R14: ffff888017af9b54 R15: ffff88806ce39500
try_to_wake_up+0x64b/0x1b30
wake_up_q+0x82/0xf0
__mutex_unlock_slowpath+0x20b/0x5e0
register_kprobe+0xc3e/0x1580
__register_trace_kprobe+0x26a/0x2d0
create_local_trace_kprobe+0x1ea/0x3d0
perf_kprobe_init+0x119/0x210
perf_kprobe_event_init+0xfc/0x1d0
perf_try_init_event+0x130/0x570
perf_event_alloc.part.0+0xf84/0x3a30
__do_sys_perf_event_open+0x4d9/0x2a60
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x6e/0xd8
RIP: 0033:0x7f9f6e2bab19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9f6b830188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f9f6e3cdf60 RCX: 00007f9f6e2bab19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000280
RBP: 00007f9f6e314f6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff29223d6f R14: 00007f9f6b830300 R15: 0000000000022000
</TASK>
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
ISOFS: Bad logical zone size 12959
loop5: detected capacity change from 0 to 264192
FAT-fs (loop5): invalid media value (0xc7)
FAT-fs (loop5): Can't find a valid FAT filesystem
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 18 53 48 sbb %dl,0x48(%rbx)
3: 89 f3 mov %esi,%ebx
5: 48 8b 74 24 10 mov 0x10(%rsp),%rsi
a: e8 c6 db d8 fc callq 0xfcd8dbd5
f: 48 89 ef mov %rbp,%rdi
12: e8 8e 59 d9 fc callq 0xfcd959a5
17: 80 e7 02 and $0x2,%bh
1a: 74 06 je 0x22
1c: e8 44 b5 fe fc callq 0xfcfeb565
21: fb sti
22: 65 ff 0d 34 a4 ae 7b decl %gs:0x7baea434(%rip) # 0x7baea45d
* 29: 74 07 je 0x32 <-- trapping instruction
2b: 5b pop %rbx
2c: 5d pop %rbp
2d: e9 23 2a 00 00 jmpq 0x2a55
32: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
37: 5b pop %rbx
38: 5d pop %rbp
39: e9 17 2a 00 00 jmpq 0x2a55
3e: 0f .byte 0xf