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BUG: KASAN: double-free in dev_free+0x446/0x700 drivers/usb/gadget/legacy/raw_gadget.c:225
Free of addr ffff8881057af980 by task syz.2.165/5823
CPU: 1 UID: 0 PID: 5823 Comm: syz.2.165 Not tainted 6.12.0-rc4-syzkaller-00059-gc67e9601e29a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:377 [inline]
print_report+0xc3/0x620 mm/kasan/report.c:488
kasan_report_invalid_free+0xaa/0xd0 mm/kasan/report.c:563
check_slab_allocation+0xfd/0x130 mm/kasan/common.c:225
kasan_slab_pre_free include/linux/kasan.h:195 [inline]
slab_free_hook mm/slub.c:2287 [inline]
slab_free mm/slub.c:4579 [inline]
kfree+0xff/0x480 mm/slub.c:4727
dev_free+0x446/0x700 drivers/usb/gadget/legacy/raw_gadget.c:225
kref_put include/linux/kref.h:65 [inline]
raw_release+0x168/0x2b0 drivers/usb/gadget/legacy/raw_gadget.c:473
__fput+0x3f6/0xb60 fs/file_table.c:431
task_work_run+0x14e/0x250 kernel/task_work.c:239
exit_task_work include/linux/task_work.h:43 [inline]
do_exit+0xadd/0x2ce0 kernel/exit.c:939
do_group_exit+0xd3/0x2a0 kernel/exit.c:1088
get_signal+0x25fb/0x2770 kernel/signal.c:2917
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x147/0x260 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f02da5f0805
Code: Unable to access opcode bytes at 0x7f02da5f07db.
RSP: 002b:00007f02d9230fa0 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 0000000000000000 RCX: 00007f02da5f0805
RDX: 00007f02d9230fe0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f02da63132e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f02da775f80 R15: 00007ffd8e33fa68
</TASK>
Allocated by task 5829:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:257 [inline]
__do_kmalloc_node mm/slub.c:4264 [inline]
__kmalloc_node_track_caller_noprof+0x1ff/0x3e0 mm/slub.c:4283
memdup_user+0x2a/0xd0 mm/util.c:226
raw_ioctl_ep_enable drivers/usb/gadget/legacy/raw_gadget.c:847 [inline]
raw_ioctl+0xbc4/0x2b90 drivers/usb/gadget/legacy/raw_gadget.c:1318
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl fs/ioctl.c:893 [inline]
__x64_sys_ioctl+0x18f/0x220 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 5823:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x37/0x50 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:2342 [inline]
slab_free mm/slub.c:4579 [inline]
kfree+0x130/0x480 mm/slub.c:4727
dev_free+0x446/0x700 drivers/usb/gadget/legacy/raw_gadget.c:225
kref_put include/linux/kref.h:65 [inline]
raw_release+0x168/0x2b0 drivers/usb/gadget/legacy/raw_gadget.c:473
__fput+0x3f6/0xb60 fs/file_table.c:431
__fput_sync+0x45/0x50 fs/file_table.c:516
__do_sys_close fs/open.c:1565 [inline]
__se_sys_close fs/open.c:1550 [inline]
__x64_sys_close+0x86/0x100 fs/open.c:1550
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff8881057af980
which belongs to the cache kmalloc-16 of size 16
The buggy address is located 0 bytes inside of
16-byte region [ffff8881057af980, ffff8881057af990)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1057af
flags: 0x200000000000000(node=0|zone=2)
page_type: f5(slab)
raw: 0200000000000000 ffff888100041640 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000800080 00000001f5000000 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 0x252800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_THISNODE), pid 1, tgid 1 (swapper/0), ts 7098522913, free_ts 0
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1537
prep_new_page mm/page_alloc.c:1545 [inline]
get_page_from_freelist+0xd5c/0x2630 mm/page_alloc.c:3457
__alloc_pages_noprof+0x221/0x2270 mm/page_alloc.c:4733
__alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
alloc_slab_page mm/slub.c:2414 [inline]
allocate_slab mm/slub.c:2578 [inline]
new_slab+0xca/0x3f0 mm/slub.c:2631
___slab_alloc+0xd45/0x1760 mm/slub.c:3818
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3908
__slab_alloc_node mm/slub.c:3961 [inline]
slab_alloc_node mm/slub.c:4122 [inline]
__do_kmalloc_node mm/slub.c:4263 [inline]
__kmalloc_node_noprof+0x150/0x3e0 mm/slub.c:4270
kmalloc_array_node_noprof include/linux/slab.h:995 [inline]
blk_mq_alloc_hctx block/blk-mq.c:3776 [inline]
blk_mq_alloc_and_init_hctx+0xa00/0x11a0 block/blk-mq.c:4249
blk_mq_realloc_hw_ctxs+0x4bf/0x630 block/blk-mq.c:4282
blk_mq_init_allocated_queue+0x39e/0x11f0 block/blk-mq.c:4330
blk_mq_alloc_queue+0x1f8/0x2f0 block/blk-mq.c:4158
scsi_alloc_sdev+0x897/0xd90 drivers/scsi/scsi_scan.c:337
scsi_probe_and_add_lun+0x525/0x7b0 drivers/scsi/scsi_scan.c:1210
__scsi_scan_target+0x1e6/0x4e0 drivers/scsi/scsi_scan.c:1757
scsi_scan_channel drivers/scsi/scsi_scan.c:1845 [inline]
scsi_scan_channel+0x149/0x1e0 drivers/scsi/scsi_scan.c:1821
scsi_scan_host_selected+0x2ae/0x370 drivers/scsi/scsi_scan.c:1874
page_owner free stack trace missing
Memory state around the buggy address:
ffff8881057af880: fa fb fc fc 00 00 fc fc 00 00 fc fc 00 00 fc fc
ffff8881057af900: 00 06 fc fc 00 02 fc fc 00 05 fc fc 00 03 fc fc
>ffff8881057af980: fa fb fc fc 00 05 fc fc 00 00 fc fc 00 07 fc fc
^
ffff8881057afa00: 00 06 fc fc 00 05 fc fc 00 07 fc fc 00 04 fc fc
ffff8881057afa80: 00 01 fc fc 00 01 fc fc 00 01 fc fc 00 04 fc fc
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