==================================================================
BUG: KASAN: slab-use-after-free in instrument_atomic_write include/linux/instrumented.h:82 [inline]
BUG: KASAN: slab-use-after-free in clear_bit include/asm-generic/bitops/instrumented-atomic.h:41 [inline]
BUG: KASAN: slab-use-after-free in cpumask_clear_cpu include/linux/cpumask.h:620 [inline]
BUG: KASAN: slab-use-after-free in flush_tlb_func+0x1ed/0x7a0 arch/x86/mm/tlb.c:1132
Write of size 8 at addr ffff888170e3fd40 by task kworker/0:2/903
CPU: 0 UID: 0 PID: 903 Comm: kworker/0:2 Not tainted 6.16.0-rc1-syzkaller #0 PREEMPT(undef)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: usb_hub_wq hub_event
Call Trace:
dump_stack_lvl+0xf4/0x170 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xd2/0x2b0 mm/kasan/report.c:521
kasan_report+0x118/0x150 mm/kasan/report.c:634
check_region_inline mm/kasan/generic.c:-1 [inline]
kasan_check_range+0x2b0/0x2c0 mm/kasan/generic.c:189
instrument_atomic_write include/linux/instrumented.h:82 [inline]
clear_bit include/asm-generic/bitops/instrumented-atomic.h:41 [inline]
cpumask_clear_cpu include/linux/cpumask.h:620 [inline]
flush_tlb_func+0x1ed/0x7a0 arch/x86/mm/tlb.c:1132
csd_do_func kernel/smp.c:134 [inline]
__flush_smp_call_function_queue+0x262/0xb80 kernel/smp.c:540
__sysvec_call_function_single+0x47/0x1e0 arch/x86/kernel/smp.c:271
instr_sysvec_call_function_single arch/x86/kernel/smp.c:266 [inline]
sysvec_call_function_single+0x9e/0xc0 arch/x86/kernel/smp.c:266
asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:709
RIP: 0010:console_flush_all+0x611/0x920 kernel/printk/printk.c:-1
Code: 00 fc ff df 48 8b 44 24 10 42 80 3c 30 00 4c 8b 64 24 48 74 08 4c 89 e7 e8 2c 52 68 00 48 ff c3 49 89 1c 24 44 0f b6 6c 24 0e <48> 8b 44 24 10 42 80 3c 30 00 74 08 4c 89 e7 e8 1b 51 68 00 4d 8b
RSP: 0018:ffffc90001a97100 EFLAGS: 00000206
RAX: 0000000000000000 RBX: 00000000000009d3 RCX: ffffc90001a972a0
RDX: ffffc90001a97200 RSI: ffffffff88a26033 RDI: ffffffff877a7cc0
RBP: ffffc90001a97250 R08: ffffffff88e96383 R09: 1ffffffff11d2c70
R10: dffffc0000000000 R11: fffffbfff11d2c71 R12: ffffffff8941f078
R13: 0000000000000001 R14: dffffc0000000000 R15: ffffffff8941f020
__console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
console_unlock+0xb7/0x1e0 kernel/printk/printk.c:3325
vprintk_emit+0x3e3/0x6c0 kernel/printk/printk.c:2450
dev_vprintk_emit+0x290/0x340 drivers/base/core.c:4917
dev_printk_emit+0xdb/0x120 drivers/base/core.c:4928
_dev_info+0x105/0x150 drivers/base/core.c:4986
hub_port_init+0x5e3/0x1f70 drivers/usb/core/hub.c:4964
hub_port_connect drivers/usb/core/hub.c:5464 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5675 [inline]
port_event drivers/usb/core/hub.c:5835 [inline]
hub_event+0x1dcd/0x3ab0 drivers/usb/core/hub.c:5917
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0x995/0x12d0 kernel/workqueue.c:3321
worker_thread+0x850/0xc60 kernel/workqueue.c:3402
kthread+0x59b/0x690 kernel/kthread.c:464
ret_from_fork+0x139/0x2d0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Allocated by task 5254:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4148 [inline]
slab_alloc_node mm/slub.c:4197 [inline]
kmem_cache_alloc_noprof+0x1b1/0x400 mm/slub.c:4204
dup_mm kernel/fork.c:1467 [inline]
copy_mm+0xb2/0x400 kernel/fork.c:1529
copy_process+0x1098/0x3160 kernel/fork.c:2169
kernel_clone+0x176/0x6b0 kernel/fork.c:2599
__do_sys_clone kernel/fork.c:2742 [inline]
__se_sys_clone kernel/fork.c:2726 [inline]
__x64_sys_clone+0x186/0x1e0 kernel/fork.c:2726
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x8f/0x250 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 5266:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x62/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2381 [inline]
slab_free mm/slub.c:4643 [inline]
kmem_cache_free+0x175/0x460 mm/slub.c:4745
exec_mmap+0x570/0x610 fs/exec.c:896
begin_new_exec+0xfd3/0x1bb0 fs/exec.c:1151
load_elf_binary+0x631/0x2130 fs/binfmt_elf.c:995
search_binary_handler fs/exec.c:1665 [inline]
exec_binprm fs/exec.c:1697 [inline]
bprm_execve+0x6bc/0xe80 fs/exec.c:1749
do_execveat_common+0x62d/0x7f0 fs/exec.c:1855
do_execve fs/exec.c:1929 [inline]
__do_sys_execve fs/exec.c:2005 [inline]
__se_sys_execve fs/exec.c:2000 [inline]
__x64_sys_execve+0x8f/0xb0 fs/exec.c:2000
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x8f/0x250 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888170e3f380
which belongs to the cache mm_struct of size 2520
The buggy address is located 2496 bytes inside of
freed 2520-byte region [ffff888170e3f380, ffff888170e3fd58)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x170e38
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88816c072101
flags: 0x100000000000040(head|node=0|zone=2)
page_type: f5(slab)
raw: 0100000000000040 ffff88810004bb40 ffffea0005d4b000 dead000000000002
raw: 0000000000000000 00000000800c000c 00000000f5000000 ffff88816c072101
head: 0100000000000040 ffff88810004bb40 ffffea0005d4b000 dead000000000002
head: 0000000000000000 00000000800c000c 00000000f5000000 ffff88816c072101
head: 0100000000000003 ffffea0005c38e01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3759, tgid 3759 (kworker/u8:0), ts 54571415767, free_ts 52319678027
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x168/0x1a0 mm/page_alloc.c:1704
prep_new_page mm/page_alloc.c:1712 [inline]
get_page_from_freelist+0x2954/0x2a30 mm/page_alloc.c:3669
__alloc_frozen_pages_noprof+0x26b/0x460 mm/page_alloc.c:4959
alloc_pages_mpol+0x150/0x320 mm/mempolicy.c:2419
alloc_slab_page mm/slub.c:2451 [inline]
allocate_slab+0x8a/0x350 mm/slub.c:2619
new_slab mm/slub.c:2673 [inline]
___slab_alloc+0x9dc/0x10e0 mm/slub.c:3859
__slab_alloc mm/slub.c:3949 [inline]
__slab_alloc_node mm/slub.c:4024 [inline]
slab_alloc_node mm/slub.c:4185 [inline]
kmem_cache_alloc_noprof+0x26e/0x400 mm/slub.c:4204
mm_alloc+0x1e/0xb0 kernel/fork.c:1104
bprm_mm_init fs/exec.c:258 [inline]
alloc_bprm+0x2a2/0x480 fs/exec.c:1461
kernel_execve+0x79/0x5f0 fs/exec.c:1880
call_usermodehelper_exec_async+0x1dd/0x2f0 kernel/umh.c:109
ret_from_fork+0x139/0x2d0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
page last free pid 3403 tgid 3403 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1248 [inline]
__free_frozen_pages+0xc3a/0xe30 mm/page_alloc.c:2706
discard_slab mm/slub.c:2717 [inline]
__put_partials+0x157/0x1b0 mm/slub.c:3186
put_cpu_partial+0x154/0x1c0 mm/slub.c:3261
__slab_free+0x2a5/0x3a0 mm/slub.c:4513
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4148 [inline]
slab_alloc_node mm/slub.c:4197 [inline]
kmem_cache_alloc_node_noprof+0x1a9/0x400 mm/slub.c:4249
__alloc_skb+0xc4/0x250 net/core/skbuff.c:660
alloc_skb include/linux/skbuff.h:1336 [inline]
nlmsg_new include/net/netlink.h:1041 [inline]
netlink_ack+0x11f/0xa60 net/netlink/af_netlink.c:2471
netlink_rcv_skb+0x224/0x3b0 net/netlink/af_netlink.c:2540
netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
netlink_unicast+0x554/0x770 net/netlink/af_netlink.c:1339
netlink_sendmsg+0x60d/0x920 net/netlink/af_netlink.c:1883
sock_sendmsg_nosec net/socket.c:712 [inline]
__sock_sendmsg+0x1da/0x220 net/socket.c:727
__sys_sendto+0x31a/0x430 net/socket.c:2180
__do_sys_sendto net/socket.c:2187 [inline]
__se_sys_sendto net/socket.c:2183 [inline]
__x64_sys_sendto+0xd9/0xf0 net/socket.c:2183
Memory state around the buggy address:
ffff888170e3fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888170e3fc80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888170e3fd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc
^
ffff888170e3fd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888170e3fe00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
----------------
Code disassembly (best guess), 3 bytes skipped:
0: df 48 8b fisttps -0x75(%rax)
3: 44 24 10 rex.R and $0x10,%al
6: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1)
b: 4c 8b 64 24 48 mov 0x48(%rsp),%r12
10: 74 08 je 0x1a
12: 4c 89 e7 mov %r12,%rdi
15: e8 2c 52 68 00 call 0x685246
1a: 48 ff c3 inc %rbx
1d: 49 89 1c 24 mov %rbx,(%r12)
21: 44 0f b6 6c 24 0e movzbl 0xe(%rsp),%r13d
* 27: 48 8b 44 24 10 mov 0x10(%rsp),%rax <-- trapping instruction
2c: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1)
31: 74 08 je 0x3b
33: 4c 89 e7 mov %r12,%rdi
36: e8 1b 51 68 00 call 0x685156
3b: 4d rex.WRB
3c: 8b .byte 0x8b