======================================================
WARNING: possible circular locking dependency detected
6.9.0-rc4-next-20240418-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.2/12997 is trying to acquire lock:
ffff88813fffece0 (&pgdat->kswapd_wait){....}-{2:2}, at: __wake_up_common_lock+0x25/0x1e0 kernel/sched/wait.c:105
but task is already holding lock:
ffff8880af2b31f8 (&trie->lock){..-.}-{2:2}, at: trie_update_elem+0xc8/0xc00 kernel/bpf/lpm_trie.c:333
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (&trie->lock){..-.}-{2:2}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
trie_delete_elem+0x96/0x6a0 kernel/bpf/lpm_trie.c:462
0xffffffffa0000817
bpf_dispatcher_nop_func include/linux/bpf.h:1233 [inline]
__bpf_prog_run include/linux/filter.h:691 [inline]
bpf_prog_run include/linux/filter.h:698 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2392 [inline]
bpf_trace_run2+0x2ec/0x540 kernel/trace/bpf_trace.c:2433
trace_tlb_flush+0x118/0x140 include/trace/events/tlb.h:38
switch_mm_irqs_off+0x7cb/0xae0
context_switch kernel/sched/core.c:5392 [inline]
__schedule+0x1066/0x4a50 kernel/sched/core.c:6745
schedule_idle+0x53/0x90 kernel/sched/core.c:6863
do_idle+0x56a/0x5d0 kernel/sched/idle.c:360
cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:430
__pfx_ap_starting+0x0/0x10 arch/x86/kernel/smpboot.c:313
common_startup_64+0x13e/0x147
-> #2 (&rq->__lock){-.-.}-{2:2}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754
_raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378
raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
raw_spin_rq_lock kernel/sched/sched.h:1406 [inline]
rq_lock kernel/sched/sched.h:1720 [inline]
task_fork_fair+0x61/0x1e0 kernel/sched/fair.c:12704
sched_cgroup_fork+0x37c/0x410 kernel/sched/core.c:4844
copy_process+0x2217/0x3dc0 kernel/fork.c:2499
kernel_clone+0x226/0x8f0 kernel/fork.c:2797
user_mode_thread+0x132/0x1a0 kernel/fork.c:2875
rest_init+0x23/0x300 init/main.c:708
start_kernel+0x47a/0x500 init/main.c:1099
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507
x86_64_start_kernel+0x99/0xa0 arch/x86/kernel/head64.c:488
common_startup_64+0x13e/0x147
-> #1 (&p->pi_lock){-.-.}-{2:2}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:553 [inline]
try_to_wake_up+0xb0/0x1470 kernel/sched/core.c:4262
autoremove_wake_function+0x16/0x110 kernel/sched/wait.c:384
__wake_up_common kernel/sched/wait.c:89 [inline]
__wake_up_common_lock+0x130/0x1e0 kernel/sched/wait.c:106
rmqueue mm/page_alloc.c:3048 [inline]
get_page_from_freelist+0x29dd/0x2d90 mm/page_alloc.c:3443
__alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4704
alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265
vm_area_alloc_pages mm/vmalloc.c:3559 [inline]
__vmalloc_area_node mm/vmalloc.c:3635 [inline]
__vmalloc_node_range_noprof+0x9a4/0x1490 mm/vmalloc.c:3816
vmalloc_user_noprof+0x74/0x80 mm/vmalloc.c:3970
kcov_ioctl+0x59/0x630 kernel/kcov.c:705
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #0 (&pgdat->kswapd_wait){....}-{2:2}:
check_prev_add kernel/locking/lockdep.c:3134 [inline]
check_prevs_add kernel/locking/lockdep.c:3253 [inline]
validate_chain+0x18cb/0x58e0 kernel/locking/lockdep.c:3869
__lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
__wake_up_common_lock+0x25/0x1e0 kernel/sched/wait.c:105
rmqueue mm/page_alloc.c:3048 [inline]
get_page_from_freelist+0x29dd/0x2d90 mm/page_alloc.c:3443
__alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4704
__alloc_pages_node_noprof include/linux/gfp.h:244 [inline]
alloc_pages_node_noprof include/linux/gfp.h:271 [inline]
__kmalloc_large_node+0x91/0x1f0 mm/slub.c:4023
__do_kmalloc_node mm/slub.c:4066 [inline]
__kmalloc_node_noprof+0x2d7/0x440 mm/slub.c:4085
kmalloc_node_noprof include/linux/slab.h:681 [inline]
bpf_map_kmalloc_node+0xd3/0x1c0 kernel/bpf/syscall.c:422
lpm_trie_node_alloc kernel/bpf/lpm_trie.c:299 [inline]
trie_update_elem+0x1cd/0xc00 kernel/bpf/lpm_trie.c:342
bpf_map_update_value+0x4d3/0x540 kernel/bpf/syscall.c:203
map_update_elem+0x53a/0x6f0 kernel/bpf/syscall.c:1641
__sys_bpf+0x76f/0x810 kernel/bpf/syscall.c:5652
__do_sys_bpf kernel/bpf/syscall.c:5771 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5769 [inline]
__x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5769
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
other info that might help us debug this:
Chain exists of:
&pgdat->kswapd_wait --> &rq->__lock --> &trie->lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&trie->lock);
lock(&rq->__lock);
lock(&trie->lock);
lock(&pgdat->kswapd_wait);
*** DEADLOCK ***
2 locks held by syz-executor.2/12997:
#0: ffffffff8e333b60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff8e333b60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e333b60 (rcu_read_lock){....}-{1:2}, at: bpf_map_update_value+0x3c4/0x540 kernel/bpf/syscall.c:202
#1: ffff8880af2b31f8 (&trie->lock){..-.}-{2:2}, at: trie_update_elem+0xc8/0xc00 kernel/bpf/lpm_trie.c:333
stack backtrace:
CPU: 1 PID: 12997 Comm: syz-executor.2 Not tainted 6.9.0-rc4-next-20240418-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2187
check_prev_add kernel/locking/lockdep.c:3134 [inline]
check_prevs_add kernel/locking/lockdep.c:3253 [inline]
validate_chain+0x18cb/0x58e0 kernel/locking/lockdep.c:3869
__lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
__wake_up_common_lock+0x25/0x1e0 kernel/sched/wait.c:105
rmqueue mm/page_alloc.c:3048 [inline]
get_page_from_freelist+0x29dd/0x2d90 mm/page_alloc.c:3443
__alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4704
__alloc_pages_node_noprof include/linux/gfp.h:244 [inline]
alloc_pages_node_noprof include/linux/gfp.h:271 [inline]
__kmalloc_large_node+0x91/0x1f0 mm/slub.c:4023
__do_kmalloc_node mm/slub.c:4066 [inline]
__kmalloc_node_noprof+0x2d7/0x440 mm/slub.c:4085
kmalloc_node_noprof include/linux/slab.h:681 [inline]
bpf_map_kmalloc_node+0xd3/0x1c0 kernel/bpf/syscall.c:422
lpm_trie_node_alloc kernel/bpf/lpm_trie.c:299 [inline]
trie_update_elem+0x1cd/0xc00 kernel/bpf/lpm_trie.c:342
bpf_map_update_value+0x4d3/0x540 kernel/bpf/syscall.c:203
map_update_elem+0x53a/0x6f0 kernel/bpf/syscall.c:1641
__sys_bpf+0x76f/0x810 kernel/bpf/syscall.c:5652
__do_sys_bpf kernel/bpf/syscall.c:5771 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5769 [inline]
__x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5769
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcde927dea9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fcde9fa50c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fcde93abf80 RCX: 00007fcde927dea9
RDX: 0000000000000020 RSI: 0000000020000080 RDI: 0000000000000002
RBP: 00007fcde92ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fcde93abf80 R15: 00007ffef94a0398
</TASK>