==================================================================
BUG: KASAN: slab-use-after-free in __bpf_trace_run kernel/trace/bpf_trace.c:2376 [inline]
BUG: KASAN: slab-use-after-free in bpf_trace_run1+0xcb/0x510 kernel/trace/bpf_trace.c:2430
Read of size 8 at addr ffff88807d2b8d18 by task syz-executor.1/14734
CPU: 1 PID: 14734 Comm: syz-executor.1 Not tainted 6.8.0-syzkaller-05239-g476a5e929119 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:377 [inline]
print_report+0x169/0x550 mm/kasan/report.c:488
kasan_report+0x143/0x180 mm/kasan/report.c:601
__bpf_trace_run kernel/trace/bpf_trace.c:2376 [inline]
bpf_trace_run1+0xcb/0x510 kernel/trace/bpf_trace.c:2430
__traceiter_rcu_utilization+0x74/0xb0 include/trace/events/rcu.h:27
trace_rcu_utilization+0x194/0x1c0 include/trace/events/rcu.h:27
rcu_core+0x139/0x1830 kernel/rcu/tree.c:2443
__do_softirq+0x2bc/0x943 kernel/softirq.c:554
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu+0xf2/0x1c0 kernel/softirq.c:633
irq_exit_rcu+0x9/0x30 kernel/softirq.c:645
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_release+0x627/0x9d0 kernel/locking/lockdep.c:5778
Code: 3c 3b 00 74 08 4c 89 f7 e8 26 85 86 00 f6 84 24 91 00 00 00 02 75 77 41 f7 c5 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 27 00 00 00 00 4b c7 44 27 08 00 00 00 00 65 48 8b 04 25
RSP: 0018:ffffc900037c7200 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff920006f8e52 RCX: ffffc900037c7203
RDX: 0000000000000003 RSI: ffffffff8baad3a0 RDI: ffffffff8bfec660
RBP: ffffc900037c7330 R08: ffffffff8f86ae6f R09: 1ffffffff1f0d5cd
R10: dffffc0000000000 R11: fffffbfff1f0d5ce R12: 1ffff920006f8e4c
R13: 0000000000000246 R14: ffffc900037c7290 R15: dffffc0000000000
rcu_lock_release include/linux/rcupdate.h:308 [inline]
rcu_read_unlock_sched include/linux/rcupdate.h:863 [inline]
pfn_valid+0x3e0/0x440 include/linux/mmzone.h:2026
page_table_check_clear+0x21/0x730 mm/page_table_check.c:68
zap_pte_range mm/memory.c:1452 [inline]
zap_pmd_range mm/memory.c:1597 [inline]
zap_pud_range mm/memory.c:1626 [inline]
zap_p4d_range mm/memory.c:1647 [inline]
unmap_page_range+0x1f7a/0x3610 mm/memory.c:1668
unmap_vmas+0x3cc/0x5f0 mm/memory.c:1758
exit_mmap+0x2c6/0xd40 mm/mmap.c:3287
__mmput+0x115/0x3c0 kernel/fork.c:1345
exit_mm+0x220/0x310 kernel/exit.c:569
do_exit+0x99e/0x27e0 kernel/exit.c:865
do_group_exit+0x207/0x2c0 kernel/exit.c:1027
get_signal+0x176e/0x1850 kernel/signal.c:2907
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:105 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
syscall_exit_to_user_mode+0xc9/0x360 kernel/entry/common.c:212
do_syscall_64+0x10a/0x240 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f6b0e67dda9
Code: Unable to access opcode bytes at 0x7f6b0e67dd7f.
RSP: 002b:00007f6b0f4c0178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f6b0e7abf88 RCX: 00007f6b0e67dda9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f6b0e7abf88
RBP: 00007f6b0e7abf80 R08: 00007f6b0f4c06c0 R09: 00007f6b0f4c06c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6b0e7abf8c
R13: 000000000000000b R14: 00007ffc8899aa50 R15: 00007ffc8899ab38
Allocated by task 14739:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
__kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387
kasan_kmalloc include/linux/kasan.h:211 [inline]
kmalloc_trace+0x1d9/0x360 mm/slub.c:4012
kmalloc include/linux/slab.h:590 [inline]
kzalloc include/linux/slab.h:711 [inline]
bpf_raw_tp_link_attach+0x2a0/0x6e0 kernel/bpf/syscall.c:3816
bpf_raw_tracepoint_open+0x1c2/0x240 kernel/bpf/syscall.c:3863
__sys_bpf+0x3c0/0x810 kernel/bpf/syscall.c:5673
__do_sys_bpf kernel/bpf/syscall.c:5738 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5736 [inline]
__x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5736
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
Freed by task 14731:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:589
poison_slab_object+0xa6/0xe0 mm/kasan/common.c:240
__kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2121 [inline]
slab_free mm/slub.c:4299 [inline]
kfree+0x14a/0x380 mm/slub.c:4409
bpf_link_release+0x3b/0x50 kernel/bpf/syscall.c:3071
__fput+0x429/0x8a0 fs/file_table.c:423
__do_sys_close fs/open.c:1557 [inline]
__se_sys_close fs/open.c:1542 [inline]
__x64_sys_close+0x7f/0x110 fs/open.c:1542
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
The buggy address belongs to the object at ffff88807d2b8d00
which belongs to the cache kmalloc-128 of size 128
The buggy address is located 24 bytes inside of
freed 128-byte region [ffff88807d2b8d00, ffff88807d2b8d80)
The buggy address belongs to the physical page:
page:ffffea0001f4ae00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7d2b8
flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000800 ffff888014c418c0 dead000000000100 dead000000000122
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 5099, tgid 5099 (udevd), ts 96848785954, free_ts 96757802421
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1533
prep_new_page mm/page_alloc.c:1540 [inline]
get_page_from_freelist+0x33ea/0x3580 mm/page_alloc.c:3311
__alloc_pages+0x256/0x680 mm/page_alloc.c:4569
__alloc_pages_node include/linux/gfp.h:238 [inline]
alloc_pages_node include/linux/gfp.h:261 [inline]
alloc_slab_page+0x5f/0x160 mm/slub.c:2190
allocate_slab mm/slub.c:2354 [inline]
new_slab+0x84/0x2f0 mm/slub.c:2407
___slab_alloc+0xd1b/0x13e0 mm/slub.c:3540
__slab_alloc mm/slub.c:3625 [inline]
__slab_alloc_node mm/slub.c:3678 [inline]
slab_alloc_node mm/slub.c:3850 [inline]
__do_kmalloc_node mm/slub.c:3980 [inline]
__kmalloc_node+0x2d9/0x4e0 mm/slub.c:3988
kmalloc_array_node include/linux/slab.h:688 [inline]
kcalloc_node include/linux/slab.h:693 [inline]
memcg_alloc_slab_cgroups+0x81/0x120 mm/memcontrol.c:3014
account_slab mm/slub.c:2317 [inline]
allocate_slab mm/slub.c:2372 [inline]
new_slab+0xc0/0x2f0 mm/slub.c:2407
___slab_alloc+0xd1b/0x13e0 mm/slub.c:3540
__slab_alloc mm/slub.c:3625 [inline]
__slab_alloc_node mm/slub.c:3678 [inline]
slab_alloc_node mm/slub.c:3850 [inline]
kmem_cache_alloc+0x250/0x350 mm/slub.c:3867
kmem_cache_zalloc include/linux/slab.h:701 [inline]
seq_open+0x62/0x140 fs/seq_file.c:63
kernfs_fop_open+0x602/0xcd0
do_dentry_open+0x907/0x15a0 fs/open.c:956
do_open fs/namei.c:3643 [inline]
path_openat+0x2860/0x3240 fs/namei.c:3800
do_filp_open+0x235/0x490 fs/namei.c:3827
page last free pid 5452 tgid 5452 stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1140 [inline]
free_unref_page_prepare+0x968/0xa90 mm/page_alloc.c:2346
free_unref_page_list+0x5a3/0x850 mm/page_alloc.c:2532
release_pages+0x2744/0x2a80 mm/swap.c:1042
tlb_batch_pages_flush mm/mmu_gather.c:98 [inline]
tlb_flush_mmu_free mm/mmu_gather.c:293 [inline]
tlb_flush_mmu+0x34d/0x4e0 mm/mmu_gather.c:300
tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:392
exit_mmap+0x4b6/0xd40 mm/mmap.c:3300
__mmput+0x115/0x3c0 kernel/fork.c:1345
exit_mm+0x220/0x310 kernel/exit.c:569
do_exit+0x99e/0x27e0 kernel/exit.c:865
do_group_exit+0x207/0x2c0 kernel/exit.c:1027
__do_sys_exit_group kernel/exit.c:1038 [inline]
__se_sys_exit_group kernel/exit.c:1036 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1036
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
Memory state around the buggy address:
ffff88807d2b8c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff88807d2b8c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88807d2b8d00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88807d2b8d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88807d2b8e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
----------------
Code disassembly (best guess):
0: 3c 3b cmp $0x3b,%al
2: 00 74 08 4c add %dh,0x4c(%rax,%rcx,1)
6: 89 f7 mov %esi,%edi
8: e8 26 85 86 00 call 0x868533
d: f6 84 24 91 00 00 00 testb $0x2,0x91(%rsp)
14: 02
15: 75 77 jne 0x8e
17: 41 f7 c5 00 02 00 00 test $0x200,%r13d
1e: 74 01 je 0x21
20: fb sti
21: 48 c7 44 24 60 0e 36 movq $0x45e0360e,0x60(%rsp)
28: e0 45
* 2a: 4b c7 04 27 00 00 00 movq $0x0,(%r15,%r12,1) <-- trapping instruction
31: 00
32: 4b c7 44 27 08 00 00 movq $0x0,0x8(%r15,%r12,1)
39: 00 00
3b: 65 gs
3c: 48 rex.W
3d: 8b .byte 0x8b
3e: 04 25 add $0x25,%al