==================================================================
BUG: KASAN: slab-out-of-bounds in __bpf_get_stackid+0x6fa/0x960 kernel/bpf/stackmap.c:274
Write of size 32 at addr ffff88810e678f60 by task syz.2.18/376
CPU: 0 PID: 376 Comm: syz.2.18 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
__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:377 [inline]
bpf_get_stackid_pe+0x350/0x400 kernel/bpf/stackmap.c:334
bpf_prog_ee169d054574282b+0x24/0x39
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+0x3c7/0x5e0 kernel/events/core.c:10273
__perf_event_overflow+0x458/0x640 kernel/events/core.c:9448
perf_event_overflow kernel/events/core.c:9469 [inline]
perf_swevent_hrtimer+0x4b4/0x540 kernel/events/core.c:10919
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x398/0x890 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x3ad/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+0x53/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0033:0x7f73b8466090
Code: 00 00 45 31 d2 48 83 b8 88 00 00 00 ff 41 b9 03 00 00 00 ba 01 00 00 00 0f 85 59 ff ff ff eb ca 66 2e 0f 1f 84 00 00 00 00 00 <80> 3d 4e f6 ed 00 00 74 40 80 3d 33 f6 ed 00 00 74 2e 80 3d 36 f6
RSP: 002b:00007ffc87e46f88 EFLAGS: 00000202
RAX: 0000001b33d24000 RBX: 0000000000000000 RCX: 0000001b33d24000
RDX: 0000000000000006 RSI: 0000000000000007 RDI: 0000000008000700
RBP: 00007f73b8815fb0 R08: 000000000003fd9c R09: 00007f73b8816038
R10: 0000001b33d2421c R11: 0000000000000006 R12: 00007f73b8815fa0
R13: 0000200000000000 R14: 00007ffc87e46f98 R15: 00007f73b8815fa0
Allocated by task 376:
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
kasan_save_alloc_info+0x1f/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+0x398/0x520 kernel/bpf/stackmap.c:117
find_and_alloc_map kernel/bpf/syscall.c:133 [inline]
map_create+0x467/0xcf0 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 ffff88810e678f00
which belongs to the cache kmalloc-128 of size 128
The buggy address is located 96 bytes inside of
128-byte region [ffff88810e678f00, ffff88810e678f80)
The buggy address belongs to the physical page:
page:ffffea0004399e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10e678
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 ffffea000439a080 dead000000000002 ffff888100042a80
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 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 1, tgid 1 (swapper/0), ts 2523101082, free_ts 0
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+0x2ca9/0x2d20 mm/page_alloc.c:4586
__alloc_pages+0x1fa/0x610 mm/page_alloc.c:5930
alloc_slab_page+0x6e/0xf0 include/linux/gfp.h:-1
allocate_slab mm/slub.c:1967 [inline]
new_slab+0x98/0x3e0 mm/slub.c:2020
___slab_alloc+0x70f/0xb70 mm/slub.c:3177
__slab_alloc+0x5e/0xa0 mm/slub.c:3263
slab_alloc_node mm/slub.c:3348 [inline]
__kmem_cache_alloc_node+0x204/0x2d0 mm/slub.c:3423
kmalloc_trace+0x29/0xb0 mm/slab_common.c:1028
kmalloc include/linux/slab.h:563 [inline]
kzalloc include/linux/slab.h:699 [inline]
class_dir_create_and_add drivers/base/core.c:3226 [inline]
get_device_parent+0x2f3/0x410 drivers/base/core.c:3290
device_add+0x308/0xec0 drivers/base/core.c:3619
usb_add_gadget+0x330/0x620 drivers/usb/gadget/udc/core.c:1382
usb_add_gadget_udc_release drivers/usb/gadget/udc/core.c:1445 [inline]
usb_add_gadget_udc+0x11a/0x150 drivers/usb/gadget/udc/core.c:1492
dummy_udc_probe+0x6e6/0x7f0 drivers/usb/gadget/udc/dummy_hcd.c:1102
platform_probe+0x16d/0x1f0 drivers/base/platform.c:1400
page_owner free stack trace missing
Memory state around the buggy address:
ffff88810e678e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc
ffff88810e678e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88810e678f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc
^
ffff88810e678f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88810e679000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
general protection fault, probably for non-canonical address 0xea89c4aac8abe8ca: 0000 [#1] PREEMPT SMP KASAN
KASAN: maybe wild-memory-access in range [0x544e4556455f4650-0x544e4556455f4657]
CPU: 0 PID: 776 Comm: syz.2.417 Tainted: G B syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:___pcpu_freelist_pop kernel/bpf/percpu_freelist.c:134 [inline]
RIP: 0010:__pcpu_freelist_pop+0x777/0x840 kernel/bpf/percpu_freelist.c:188
Code: 00 74 52 48 89 df e8 78 0a 2a 00 eb 48 e8 a1 7e e4 ff eb 4b e8 9a 7e e4 ff 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 ff e8 5b 09 2a 00 4d 8b 37 48 b8 00 00 00
RSP: 0000:ffffc900020e7750 EFLAGS: 00010006
RAX: 0a89c8aac8abe8ca RBX: ffffe8ffffd10060 RCX: dffffc0000000000
RDX: 0000000000010000 RSI: 0000000000000004 RDI: ffffc900020e76e0
RBP: ffffc900020e7790 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200041cedc R12: ffffe8ffffd10068
R13: 1ffffd1ffffa200c R14: 0000000000000001 R15: 544e4556455f4652
FS: 0000555555e52500(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000000008ab CR3: 0000000118aac000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
pcpu_freelist_pop+0x8a/0xf0 kernel/bpf/percpu_freelist.c:197
__bpf_get_stackid+0x6d5/0x960 kernel/bpf/stackmap.c:271
____bpf_get_stackid_pe kernel/bpf/stackmap.c:377 [inline]
bpf_get_stackid_pe+0x350/0x400 kernel/bpf/stackmap.c:334
bpf_prog_ee169d054574282b+0x24/0x39
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+0x3c7/0x5e0 kernel/events/core.c:10273
__perf_event_overflow+0x458/0x640 kernel/events/core.c:9448
perf_event_overflow kernel/events/core.c:9469 [inline]
perf_swevent_hrtimer+0x4b4/0x540 kernel/events/core.c:10919
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x398/0x890 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x3ad/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+0x53/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0033:0x7f73b8466112
Code: 89 de bf ff ff ff ff 44 0f b6 05 b9 f5 ed 00 e8 94 f4 ff ff 80 3d e2 f5 ed 00 00 74 c9 48 89 df 5b e9 32 36 ff ff 66 90 41 57 <41> 56 41 55 41 54 49 89 fc 55 53 48 83 ec 18 8b 47 08 85 c0 0f 85
RSP: 002b:00007ffc87e46fd0 EFLAGS: 00000217
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f73b859ce59
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f73b8815fa0
RBP: 00000000000008ab R08: 0009e15cfdd0f140 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f73b8815fac R14: 00007f73b8815fa8 R15: 00007f73b8815fa0
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:___pcpu_freelist_pop kernel/bpf/percpu_freelist.c:134 [inline]
RIP: 0010:__pcpu_freelist_pop+0x777/0x840 kernel/bpf/percpu_freelist.c:188
Code: 00 74 52 48 89 df e8 78 0a 2a 00 eb 48 e8 a1 7e e4 ff eb 4b e8 9a 7e e4 ff 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 ff e8 5b 09 2a 00 4d 8b 37 48 b8 00 00 00
RSP: 0000:ffffc900020e7750 EFLAGS: 00010006
RAX: 0a89c8aac8abe8ca RBX: ffffe8ffffd10060 RCX: dffffc0000000000
RDX: 0000000000010000 RSI: 0000000000000004 RDI: ffffc900020e76e0
RBP: ffffc900020e7790 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200041cedc R12: ffffe8ffffd10068
R13: 1ffffd1ffffa200c R14: 0000000000000001 R15: 544e4556455f4652
FS: 0000555555e52500(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000000008ab CR3: 0000000118aac000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 00 74 52 48 add %dh,0x48(%rdx,%rdx,2)
4: 89 df mov %ebx,%edi
6: e8 78 0a 2a 00 call 0x2a0a83
b: eb 48 jmp 0x55
d: e8 a1 7e e4 ff call 0xffe47eb3
12: eb 4b jmp 0x5f
14: e8 9a 7e e4 ff call 0xffe47eb3
19: 4c 89 f8 mov %r15,%rax
1c: 48 c1 e8 03 shr $0x3,%rax
20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx
27: fc ff df
* 2a: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction
2e: 74 08 je 0x38
30: 4c 89 ff mov %r15,%rdi
33: e8 5b 09 2a 00 call 0x2a0993
38: 4d 8b 37 mov (%r15),%r14
3b: 48 rex.W
3c: b8 .byte 0xb8
3d: 00 00 add %al,(%rax)