==================================================================
BUG: KASAN: double-free in rcu_free_sheaf+0x31/0x200 mm/slub.c:6052
Free of addr ffff888055387380 by task syz.0.2764/16630
CPU: 1 UID: 0 PID: 16630 Comm: syz.0.2764 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
print_address_description+0x55/0x1e0 mm/kasan/report.c:378
print_report+0x58/0x70 mm/kasan/report.c:482
kasan_report_invalid_free+0xea/0x110 mm/kasan/report.c:557
check_slab_allocation mm/kasan/common.c:-1 [inline]
__kasan_slab_pre_free+0x104/0x120 mm/kasan/common.c:261
kasan_slab_pre_free include/linux/kasan.h:199 [inline]
slab_free_hook mm/slub.c:2693 [inline]
__rcu_free_sheaf_prepare+0x10a/0x2a0 mm/slub.c:3009
rcu_free_sheaf+0x31/0x200 mm/slub.c:6052
rcu_do_batch kernel/rcu/tree.c:2650 [inline]
rcu_core+0x926/0x1260 kernel/rcu/tree.c:2919
handle_softirqs+0x226/0x860 kernel/softirq.c:645
__do_softirq kernel/softirq.c:679 [inline]
invoke_softirq kernel/softirq.c:519 [inline]
__irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x80 kernel/kcov.c:212
Code: 8b 3d b4 c5 ac 0c 48 89 de 5b e9 73 7e 64 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0d 48 25 cd 11 65 48 8b 15 48 25 cd 11 f7 c2 00 01 00 ff
RSP: 0018:ffffc900066f7348 EFLAGS: 00000286
RAX: ffffffff8243a919 RBX: 0000000000000001 RCX: ffff888069335dc0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 000000000005ac90
RBP: ffffc900066f7690 R08: ffffea00016b2407 R09: 1ffffd40002d6480
R10: dffffc0000000000 R11: fffff940002d6481 R12: 1ffff1100ea6ea89
R13: 00007f801f000000 R14: 000000000005ac90 R15: 00007f801ee89000
page_table_check_clear+0x19/0x500 mm/page_table_check.c:64
ptep_get_and_clear_full arch/x86/include/asm/jump_label.h:-1 [inline]
get_and_clear_full_ptes include/linux/pgtable.h:879 [inline]
zap_present_folio_ptes mm/memory.c:1779 [inline]
zap_present_ptes mm/memory.c:1861 [inline]
do_zap_pte_range mm/memory.c:1963 [inline]
zap_pte_range mm/memory.c:2065 [inline]
zap_pmd_range mm/memory.c:2151 [inline]
zap_pud_range mm/memory.c:2179 [inline]
zap_p4d_range mm/memory.c:2200 [inline]
__zap_vma_range+0x3a12/0x4f80 mm/memory.c:2240
unmap_vmas+0x390/0x550 mm/memory.c:2309
exit_mmap+0x293/0x9f0 mm/mmap.c:1315
__mmput+0x118/0x420 kernel/fork.c:1193
exit_mm+0x221/0x2d0 kernel/exit.c:617
do_exit+0x6cd/0x2360 kernel/exit.c:999
do_group_exit+0x22d/0x2f0 kernel/exit.c:1154
get_signal+0x121b/0x12c0 kernel/signal.c:3051
arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0x10e/0x770 kernel/entry/common.c:101
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:336 [inline]
do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f802039e159
Code: Unable to access opcode bytes at 0x7f802039e12f.
RSP: 002b:00007f80211d50e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f8020625fa8 RCX: 00007f802039e159
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f8020625fa8
RBP: 00007f8020625fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8020626038 R14: 00007fff739ddcf0 R15: 00007fff739dddd8
Allocated by task 39:
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
__kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415
kasan_kmalloc include/linux/kasan.h:263 [inline]
__kmalloc_cache_noprof+0x321/0x600 mm/slub.c:5563
_kmalloc_noprof include/linux/slab.h:991 [inline]
_kzalloc_noprof include/linux/slab.h:1312 [inline]
hwsim_update_pib+0x7e/0x400 drivers/net/ieee802154/mac802154_hwsim.c:103
hwsim_set_promiscuous_mode+0x196/0x2e0 drivers/net/ieee802154/mac802154_hwsim.c:326
drv_set_promiscuous_mode+0x159/0x2e0 net/mac802154/driver-ops.h:127
drv_start+0x4ea/0x1010 net/mac802154/driver-ops.h:167
mac802154_scan_worker+0x8e6/0xe60 net/mac802154/scan.c:248
process_one_work kernel/workqueue.c:3396 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Freed by task 16630:
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:253 [inline]
__kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2748 [inline]
__rcu_free_sheaf_prepare+0x12d/0x2a0 mm/slub.c:3009
rcu_free_sheaf+0x31/0x200 mm/slub.c:6052
rcu_do_batch kernel/rcu/tree.c:2650 [inline]
rcu_core+0x926/0x1260 kernel/rcu/tree.c:2919
handle_softirqs+0x226/0x860 kernel/softirq.c:645
__do_softirq kernel/softirq.c:679 [inline]
invoke_softirq kernel/softirq.c:519 [inline]
__irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
The buggy address belongs to the object at ffff888055387380
which belongs to the cache kmalloc-64 of size 64
The buggy address is located 0 bytes inside of
64-byte region [ffff888055387380, ffff8880553873c0)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x55387
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801b0418c0 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000200020 00000000f5000000 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 0xd2cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5617, tgid 5617 (syz-executor), ts 72669693331
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1871
prep_new_page mm/page_alloc.c:1879 [inline]
get_page_from_freelist+0x2209/0x2280 mm/page_alloc.c:3943
__alloc_frozen_pages_noprof+0x217/0x5a0 mm/page_alloc.c:5436
alloc_slab_page mm/slub.c:3347 [inline]
allocate_slab+0x7d/0x620 mm/slub.c:3462
new_slab mm/slub.c:3513 [inline]
refill_objects+0x2d5/0x350 mm/slub.c:7410
refill_sheaf mm/slub.c:2885 [inline]
__pcs_replace_empty_main+0x2c8/0x6c0 mm/slub.c:4774
alloc_from_pcs mm/slub.c:4850 [inline]
slab_alloc_node mm/slub.c:4984 [inline]
__do_kmalloc_node mm/slub.c:5413 [inline]
__kmalloc_noprof+0x47b/0x720 mm/slub.c:5439
_kmalloc_noprof include/linux/slab.h:995 [inline]
_kzalloc_noprof include/linux/slab.h:1312 [inline]
kobject_get_path+0xc5/0x2f0 lib/kobject.c:161
kobject_uevent_env+0x29e/0x9e0 lib/kobject_uevent.c:548
netdev_queue_add_kobject net/core/net-sysfs.c:2006 [inline]
netdev_queue_update_kobjects+0x33a/0x6b0 net/core/net-sysfs.c:2049
register_queue_kobjects net/core/net-sysfs.c:2112 [inline]
netdev_register_kobject+0x277/0x350 net/core/net-sysfs.c:2358
register_netdevice+0x1433/0x1eb0 net/core/dev.c:11503
veth_newlink+0x6a0/0xdc0 drivers/net/veth.c:1899
rtnl_newlink_create+0x305/0x7b0 net/core/rtnetlink.c:3996
__rtnl_newlink net/core/rtnetlink.c:4125 [inline]
rtnl_newlink+0x167a/0x1c30 net/core/rtnetlink.c:4242
rtnetlink_rcv_msg+0x802/0xc00 net/core/rtnetlink.c:7159
page last free pid 1 tgid 1 ts 20817267213 stack trace:
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1418 [inline]
free_pages_prepare+0x9eb/0xaf0 mm/page_alloc.c:1463
__free_contig_range_common+0x174/0x340 mm/page_alloc.c:7072
destroy_args+0x4e5/0x570 mm/debug_vm_pgtable.c:993
debug_vm_pgtable+0x3f8/0x410 mm/debug_vm_pgtable.c:1368
do_one_initcall+0x250/0x870 init/main.c:1357
do_initcall_level+0x10a/0x1a0 init/main.c:1419
do_initcalls+0x59/0xa0 init/main.c:1435
kernel_init_freeable+0x29d/0x3e0 init/main.c:1670
kernel_init+0x22/0x1d0 init/main.c:1560
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Memory state around the buggy address:
ffff888055387280: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
ffff888055387300: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff888055387380: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
^
ffff888055387400: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
ffff888055387480: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
==================================================================
----------------
Code disassembly (best guess):
0: 8b 3d b4 c5 ac 0c mov 0xcacc5b4(%rip),%edi # 0xcacc5ba
6: 48 89 de mov %rbx,%rsi
9: 5b pop %rbx
a: e9 73 7e 64 00 jmp 0x647e82
f: cc int3
10: cc int3
11: cc int3
12: 90 nop
13: 90 nop
14: 90 nop
15: 90 nop
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: 90 nop
22: f3 0f 1e fa endbr64
26: 48 8b 04 24 mov (%rsp),%rax
* 2a: 65 48 8b 0d 48 25 cd mov %gs:0x11cd2548(%rip),%rcx # 0x11cd257a <-- trapping instruction
31: 11
32: 65 48 8b 15 48 25 cd mov %gs:0x11cd2548(%rip),%rdx # 0x11cd2582
39: 11
3a: f7 c2 00 01 00 ff test $0xff000100,%edx