==================================================================
BUG: KASAN: slab-out-of-bounds in __bpf_get_stackid+0x6fa/0x960 kernel/bpf/stackmap.c:274
Write of size 32 at addr ffff888133b80310 by task syz.4.1398/5525

CPU: 1 PID: 5525 Comm: syz.4.1398 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <IRQ>
 __dump_stack+0x21/0x24 lib/dump_stack.c:88
 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
 print_address_description+0x71/0x200 mm/kasan/report.c:316
 print_report+0x4a/0x60 mm/kasan/report.c:420
 kasan_report+0x122/0x150 mm/kasan/report.c:524
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x249/0x2a0 mm/kasan/generic.c:189
 memcpy+0x44/0x70 mm/kasan/shadow.c:66
 __bpf_get_stackid+0x6fa/0x960 kernel/bpf/stackmap.c:274
 ____bpf_get_stackid_pe kernel/bpf/stackmap.c:365 [inline]
 bpf_get_stackid_pe+0x2ee/0x400 kernel/bpf/stackmap.c:334
 bpf_prog_88b6ce719581ac33+0x21/0x31
 bpf_dispatcher_nop_func include/linux/bpf.h:987 [inline]
 __bpf_prog_run include/linux/filter.h:607 [inline]
 bpf_prog_run include/linux/filter.h:614 [inline]
 bpf_overflow_handler+0x3d0/0x5e0 kernel/events/core.c:10273
 __perf_event_overflow+0x437/0x620 kernel/events/core.c:9448
 perf_event_overflow kernel/events/core.c:9469 [inline]
 perf_swevent_hrtimer+0x400/0x5b0 kernel/events/core.c:10919
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x3bb/0x8e0 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x3c7/0x8c0 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
 __sysvec_apic_timer_interrupt+0x11e/0x440 arch/x86/kernel/apic/apic.c:1124
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:mutex_unlock+0x1/0x230 kernel/locking/mutex.c:558
Code: ff ff ff 66 0f 1f 44 00 00 55 48 89 e5 be 02 00 00 00 e8 c2 12 00 00 5d c3 90 90 90 90 90 90 90 90 90 90 90 b8 c9 ff ad 1b 55 <48> 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 83 ec 60 49 89
RSP: 0018:ffffc9000e76fbd0 EFLAGS: 00000282
RAX: ffffffff819a1b4f RBX: ffff888132976c00 RCX: 0000000000080000
RDX: ffffc90003e74000 RSI: 000000000000002b RDI: ffff888132976c10
RBP: ffffc9000e76fe80 R08: ffff88811775183f R09: 1ffff11022eea307
R10: dffffc0000000000 R11: ffffed1022eea308 R12: 0000000040042408
R13: dffffc0000000000 R14: fffff52001cedf8c R15: 0000000000000000
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0x12f/0x1b0 fs/ioctl.c:856
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:856
 x64_sys_call+0x58b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f5d0739ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5d08221028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f5d07616090 RCX: 00007f5d0739ce59
RDX: 0000000000000005 RSI: 0000000040042408 RDI: 0000000000000006
RBP: 00007f5d07432d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5d07616128 R14: 00007f5d07616090 R15: 00007ffc43b70d98
 </TASK>

Allocated by task 5520:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
 kasan_save_alloc_info+0x25/0x30 mm/kasan/generic.c:505
 ____kasan_kmalloc mm/kasan/common.c:380 [inline]
 __kasan_kmalloc+0x95/0xb0 mm/kasan/common.c:389
 kasan_kmalloc include/linux/kasan.h:212 [inline]
 __do_kmalloc_node mm/slab_common.c:938 [inline]
 __kmalloc_node+0xb2/0x1e0 mm/slab_common.c:945
 kmalloc_node include/linux/slab.h:589 [inline]
 __bpf_map_area_alloc kernel/bpf/syscall.c:328 [inline]
 bpf_map_area_alloc+0x4b/0xe0 kernel/bpf/syscall.c:341
 prealloc_elems_and_freelist+0x8a/0x1e0 kernel/bpf/stackmap.c:51
 stack_map_alloc+0x3a7/0x530 kernel/bpf/stackmap.c:117
 find_and_alloc_map kernel/bpf/syscall.c:133 [inline]
 map_create+0x49c/0xd80 kernel/bpf/syscall.c:1126
 __sys_bpf+0x34e/0x850 kernel/bpf/syscall.c:4988
 __do_sys_bpf kernel/bpf/syscall.c:5110 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5108 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5108
 x64_sys_call+0x488/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:322
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

The buggy address belongs to the object at ffff888133b80300
 which belongs to the cache kmalloc-64 of size 64
The buggy address is located 16 bytes inside of
 64-byte region [ffff888133b80300, ffff888133b80340)

The buggy address belongs to the physical page:
page:ffffea0004cee000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x133b80
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 dead000000000100 dead000000000122 ffff888100042780
raw: 0000000000000000 0000000000200020 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 588, tgid 587 (syz.4.76), ts 34158447458, free_ts 34036678879
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1f5/0x210 mm/page_alloc.c:2672
 prep_new_page+0x1c/0x110 mm/page_alloc.c:2679
 get_page_from_freelist+0x2d12/0x2d80 mm/page_alloc.c:4585
 __alloc_pages+0x1fa/0x610 mm/page_alloc.c:5929
 alloc_slab_page+0x6e/0xf0 include/linux/gfp.h:-1
 allocate_slab mm/slub.c:1967 [inline]
 new_slab+0x98/0x3d0 mm/slub.c:2020
 ___slab_alloc+0x6bd/0xb20 mm/slub.c:3177
 __slab_alloc+0x5e/0xa0 mm/slub.c:3263
 slab_alloc_node mm/slub.c:3348 [inline]
 __kmem_cache_alloc_node+0x203/0x2c0 mm/slub.c:3423
 __do_kmalloc_node mm/slab_common.c:937 [inline]
 __kmalloc+0xa1/0x1e0 mm/slab_common.c:951
 kmalloc include/linux/slab.h:568 [inline]
 kzalloc include/linux/slab.h:699 [inline]
 kobject_get_path+0xbf/0x200 lib/kobject.c:152
 kobject_uevent_env+0x2a0/0x730 lib/kobject_uevent.c:544
 kobject_uevent+0x1d/0x30 lib/kobject_uevent.c:657
 netdev_queue_add_kobject net/core/net-sysfs.c:1671 [inline]
 netdev_queue_update_kobjects+0x22c/0x470 net/core/net-sysfs.c:1712
 register_queue_kobjects net/core/net-sysfs.c:1773 [inline]
 netdev_register_kobject+0x2af/0x360 net/core/net-sysfs.c:2013
 register_netdevice+0xeb1/0x1530 net/core/dev.c:10206
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1580 [inline]
 free_pcp_prepare mm/page_alloc.c:1654 [inline]
 free_unref_page_prepare+0x7f8/0x800 mm/page_alloc.c:3620
 free_unref_page+0x95/0x540 mm/page_alloc.c:3718
 free_the_page mm/page_alloc.c:863 [inline]
 __free_pages+0x67/0x100 mm/page_alloc.c:6019
 __vunmap+0x9c0/0xb80 mm/vmalloc.c:2739
 free_work+0x5a/0x80 mm/vmalloc.c:98
 process_one_work+0x71f/0xc40 kernel/workqueue.c:2302
 worker_thread+0xa29/0x11e0 kernel/workqueue.c:2449
 kthread+0x281/0x320 kernel/kthread.c:386
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

Memory state around the buggy address:
 ffff888133b80200: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff888133b80280: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff888133b80300: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc
                                  ^
 ffff888133b80380: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff888133b80400: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
==================================================================
----------------
Code disassembly (best guess), 3 bytes skipped:
   0:	66 0f 1f 44 00 00    	nopw   0x0(%rax,%rax,1)
   6:	55                   	push   %rbp
   7:	48 89 e5             	mov    %rsp,%rbp
   a:	be 02 00 00 00       	mov    $0x2,%esi
   f:	e8 c2 12 00 00       	call   0x12d6
  14:	5d                   	pop    %rbp
  15:	c3                   	ret
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	90                   	nop
  1c:	90                   	nop
  1d:	90                   	nop
  1e:	90                   	nop
  1f:	90                   	nop
  20:	90                   	nop
  21:	b8 c9 ff ad 1b       	mov    $0x1badffc9,%eax
  26:	55                   	push   %rbp
* 27:	48 89 e5             	mov    %rsp,%rbp <-- trapping instruction
  2a:	41 57                	push   %r15
  2c:	41 56                	push   %r14
  2e:	41 55                	push   %r13
  30:	41 54                	push   %r12
  32:	53                   	push   %rbx
  33:	48 83 e4 e0          	and    $0xffffffffffffffe0,%rsp
  37:	48 83 ec 60          	sub    $0x60,%rsp
  3b:	49                   	rex.WB
  3c:	89                   	.byte 0x89