==================================================================
BUG: KASAN: slab-use-after-free in instrument_atomic_read include/linux/instrumented.h:82 [inline]
BUG: KASAN: slab-use-after-free in atomic_long_read include/linux/atomic/atomic-instrumented.h:3188 [inline]
BUG: KASAN: slab-use-after-free in file_ref_read include/linux/file_ref.h:198 [inline]
BUG: KASAN: slab-use-after-free in filp_flush+0x25/0x190 fs/open.c:1464
Read of size 8 at addr ffff88802d5efd58 by task syz.9.633/8586
CPU: 1 UID: 0 PID: 8586 Comm: syz.9.633 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0x13d/0x4b0 mm/kasan/report.c:482
kasan_report+0xdf/0x1c0 mm/kasan/report.c:595
check_region_inline mm/kasan/generic.c:186 [inline]
kasan_check_range+0x10f/0x1e0 mm/kasan/generic.c:200
instrument_atomic_read include/linux/instrumented.h:82 [inline]
atomic_long_read include/linux/atomic/atomic-instrumented.h:3188 [inline]
file_ref_read include/linux/file_ref.h:198 [inline]
filp_flush+0x25/0x190 fs/open.c:1464
filp_close+0x1c/0x30 fs/open.c:1484
gaudio_close_snd_dev drivers/usb/gadget/function/u_uac1_legacy.c:263 [inline]
gaudio_cleanup+0x59/0x100 drivers/usb/gadget/function/u_uac1_legacy.c:305
f_audio_bind+0x56c/0x660 drivers/usb/gadget/function/f_uac1_legacy.c:792
usb_add_function+0x219/0x890 drivers/usb/gadget/composite.c:333
configfs_composite_bind+0xd83/0x1960 drivers/usb/gadget/configfs.c:1802
gadget_bind_driver+0x28c/0xbf0 drivers/usb/gadget/udc/core.c:1662
call_driver_probe drivers/base/dd.c:628 [inline]
really_probe+0x241/0xa60 drivers/base/dd.c:706
__driver_probe_device+0x20e/0x450 drivers/base/dd.c:868
driver_probe_device+0x4a/0x140 drivers/base/dd.c:898
__driver_attach+0x21f/0x5b0 drivers/base/dd.c:1292
bus_for_each_dev+0x13e/0x1d0 drivers/base/bus.c:383
bus_add_driver+0x305/0x5b0 drivers/base/bus.c:763
driver_register+0x1e2/0x360 drivers/base/driver.c:174
usb_gadget_register_driver_owner+0x132/0x210 drivers/usb/gadget/udc/core.c:1752
gadget_dev_desc_UDC_store+0x1b0/0x2e0 drivers/usb/gadget/configfs.c:300
flush_write_buffer fs/configfs/file.c:207 [inline]
configfs_write_iter+0x302/0x4e0 fs/configfs/file.c:229
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x6ac/0x1050 fs/read_write.c:687
ksys_write+0x12a/0x250 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f204659e019
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:00007f20447f6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f2046825fa0 RCX: 00007f204659e019
RDX: 000000000000000c RSI: 0000200000000280 RDI: 0000000000000003
RBP: 00007f204663500c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2046826038 R14: 00007f2046825fa0 R15: 00007ffe58c798e8
Allocated by task 5998:
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
unpoison_slab_object mm/kasan/common.c:340 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:366
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4584 [inline]
slab_alloc_node mm/slub.c:4917 [inline]
kmem_cache_alloc_noprof+0x26b/0x6a0 mm/slub.c:4931
alloc_empty_file+0x5b/0x1c0 fs/file_table.c:262
path_openat+0xe7/0x4280 fs/namei.c:4849
do_file_open+0x20e/0x430 fs/namei.c:4892
do_sys_openat2+0x10f/0x1e0 fs/open.c:1368
do_sys_open fs/open.c:1374 [inline]
__do_sys_openat fs/open.c:1390 [inline]
__se_sys_openat fs/open.c:1385 [inline]
__x64_sys_openat+0x12d/0x210 fs/open.c:1385
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 1035:
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:253 [inline]
__kasan_slab_free+0x5f/0x80 mm/kasan/common.c:285
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2677 [inline]
slab_free_after_rcu_debug+0xdf/0x170 mm/slub.c:6439
rcu_do_batch kernel/rcu/tree.c:2645 [inline]
rcu_core+0x5a2/0x10d0 kernel/rcu/tree.c:2897
handle_softirqs+0x1ea/0x9b0 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x162/0x210 kernel/softirq.c:735
irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
Last potentially related work creation:
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:556
slab_free_hook mm/slub.c:2638 [inline]
slab_free mm/slub.c:6377 [inline]
kmem_cache_free+0x427/0x6b0 mm/slub.c:6504
file_free fs/file_table.c:104 [inline]
__fput_deferred+0x3e9/0x4a0 fs/file_table.c:567
fput_close+0x118/0x250 fs/file_table.c:629
path_openat+0x1417/0x4280 fs/namei.c:4872
do_file_open+0x20e/0x430 fs/namei.c:4892
do_sys_openat2+0x10f/0x1e0 fs/open.c:1368
do_sys_open fs/open.c:1374 [inline]
__do_sys_openat fs/open.c:1390 [inline]
__se_sys_openat fs/open.c:1385 [inline]
__x64_sys_openat+0x12d/0x210 fs/open.c:1385
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff88802d5efc00
which belongs to the cache filp of size 352
The buggy address is located 344 bytes inside of
freed 352-byte region [ffff88802d5efc00, ffff88802d5efd60)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2d5ee
head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff8880284a0401
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801cee2500 dead000000000100 dead000000000122
raw: 0000000000000000 0000000800120012 00000000f5000000 ffff8880284a0401
head: 00fff00000000040 ffff88801cee2500 dead000000000100 dead000000000122
head: 0000000000000000 0000000800120012 00000000f5000000 ffff8880284a0401
head: 00fff00000000001 ffffffffffffff81 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000002
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 2399, tgid 2399 (kworker/u8:8), ts 17035210966, free_ts 0
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1859
prep_new_page mm/page_alloc.c:1867 [inline]
get_page_from_freelist+0xf48/0x3530 mm/page_alloc.c:3946
__alloc_frozen_pages_noprof+0x299/0x2dc0 mm/page_alloc.c:5304
alloc_slab_page mm/slub.c:3266 [inline]
allocate_slab mm/slub.c:3380 [inline]
new_slab+0xa2/0x640 mm/slub.c:3426
refill_objects+0xe3/0x410 mm/slub.c:7310
refill_sheaf mm/slub.c:2804 [inline]
__pcs_replace_empty_main+0x376/0x680 mm/slub.c:4675
alloc_from_pcs mm/slub.c:4773 [inline]
slab_alloc_node mm/slub.c:4905 [inline]
kmem_cache_alloc_noprof+0x46e/0x6a0 mm/slub.c:4931
alloc_empty_file+0x5b/0x1c0 fs/file_table.c:262
path_openat+0xe7/0x4280 fs/namei.c:4849
do_file_open+0x20e/0x430 fs/namei.c:4892
do_open_execat+0xd1/0x360 fs/exec.c:785
alloc_bprm+0x2d/0x9d0 fs/exec.c:1431
class_bprm_constructor fs/exec.c:1496 [inline]
kernel_execve+0x8f/0x3a0 fs/exec.c:1889
call_usermodehelper_exec_async+0x239/0x4b0 kernel/umh.c:109
ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
page_owner free stack trace missing
Memory state around the buggy address:
ffff88802d5efc00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88802d5efc80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88802d5efd00: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
^
ffff88802d5efd80: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
ffff88802d5efe00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in arch_atomic64_read arch/x86/include/asm/atomic64_64.h:15 [inline]
BUG: KASAN: slab-use-after-free in raw_atomic64_read include/linux/atomic/atomic-arch-fallback.h:2583 [inline]
BUG: KASAN: slab-use-after-free in raw_atomic_long_read include/linux/atomic/atomic-long.h:38 [inline]
BUG: KASAN: slab-use-after-free in atomic_long_read include/linux/atomic/atomic-instrumented.h:3189 [inline]
BUG: KASAN: slab-use-after-free in file_ref_read include/linux/file_ref.h:198 [inline]
BUG: KASAN: slab-use-after-free in filp_flush+0x167/0x190 fs/open.c:1464
Read of size 8 at addr ffff88802d5efd58 by task syz.9.633/8586
CPU: 1 UID: 0 PID: 8586 Comm: syz.9.633 Tainted: G B L syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0x13d/0x4b0 mm/kasan/report.c:482
kasan_report+0xdf/0x1c0 mm/kasan/report.c:595
arch_atomic64_read arch/x86/include/asm/atomic64_64.h:15 [inline]
raw_atomic64_read include/linux/atomic/atomic-arch-fallback.h:2583 [inline]
raw_atomic_long_read include/linux/atomic/atomic-long.h:38 [inline]
atomic_long_read include/linux/atomic/atomic-instrumented.h:3189 [inline]
file_ref_read include/linux/file_ref.h:198 [inline]
filp_flush+0x167/0x190 fs/open.c:1464
filp_close+0x1c/0x30 fs/open.c:1484
gaudio_close_snd_dev drivers/usb/gadget/function/u_uac1_legacy.c:263 [inline]
gaudio_cleanup+0x59/0x100 drivers/usb/gadget/function/u_uac1_legacy.c:305
f_audio_bind+0x56c/0x660 drivers/usb/gadget/function/f_uac1_legacy.c:792
usb_add_function+0x219/0x890 drivers/usb/gadget/composite.c:333
configfs_composite_bind+0xd83/0x1960 drivers/usb/gadget/configfs.c:1802
gadget_bind_driver+0x28c/0xbf0 drivers/usb/gadget/udc/core.c:1662
call_driver_probe drivers/base/dd.c:628 [inline]
really_probe+0x241/0xa60 drivers/base/dd.c:706
__driver_probe_device+0x20e/0x450 drivers/base/dd.c:868
driver_probe_device+0x4a/0x140 drivers/base/dd.c:898
__driver_attach+0x21f/0x5b0 drivers/base/dd.c:1292
bus_for_each_dev+0x13e/0x1d0 drivers/base/bus.c:383
bus_add_driver+0x305/0x5b0 drivers/base/bus.c:763
driver_register+0x1e2/0x360 drivers/base/driver.c:174
usb_gadget_register_driver_owner+0x132/0x210 drivers/usb/gadget/udc/core.c:1752
gadget_dev_desc_UDC_store+0x1b0/0x2e0 drivers/usb/gadget/configfs.c:300
flush_write_buffer fs/configfs/file.c:207 [inline]
configfs_write_iter+0x302/0x4e0 fs/configfs/file.c:229
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x6ac/0x1050 fs/read_write.c:687
ksys_write+0x12a/0x250 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f204659e019
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:00007f20447f6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f2046825fa0 RCX: 00007f204659e019
RDX: 000000000000000c RSI: 0000200000000280 RDI: 0000000000000003
RBP: 00007f204663500c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2046826038 R14: 00007f2046825fa0 R15: 00007ffe58c798e8
Allocated by task 5998:
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
unpoison_slab_object mm/kasan/common.c:340 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:366
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4584 [inline]
slab_alloc_node mm/slub.c:4917 [inline]
kmem_cache_alloc_noprof+0x26b/0x6a0 mm/slub.c:4931
alloc_empty_file+0x5b/0x1c0 fs/file_table.c:262
path_openat+0xe7/0x4280 fs/namei.c:4849
do_file_open+0x20e/0x430 fs/namei.c:4892
do_sys_openat2+0x10f/0x1e0 fs/open.c:1368
do_sys_open fs/open.c:1374 [inline]
__do_sys_openat fs/open.c:1390 [inline]
__se_sys_openat fs/open.c:1385 [inline]
__x64_sys_openat+0x12d/0x210 fs/open.c:1385
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 1035:
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:253 [inline]
__kasan_slab_free+0x5f/0x80 mm/kasan/common.c:285
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2677 [inline]
slab_free_after_rcu_debug+0xdf/0x170 mm/slub.c:6439
rcu_do_batch kernel/rcu/tree.c:2645 [inline]
rcu_core+0x5a2/0x10d0 kernel/rcu/tree.c:2897
handle_softirqs+0x1ea/0x9b0 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x162/0x210 kernel/softirq.c:735
irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
Last potentially related work creation:
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:556
slab_free_hook mm/slub.c:2638 [inline]
slab_free mm/slub.c:6377 [inline]
kmem_cache_free+0x427/0x6b0 mm/slub.c:6504
file_free fs/file_table.c:104 [inline]
__fput_deferred+0x3e9/0x4a0 fs/file_table.c:567
fput_close+0x118/0x250 fs/file_table.c:629
path_openat+0x1417/0x4280 fs/namei.c:4872
do_file_open+0x20e/0x430 fs/namei.c:4892
do_sys_openat2+0x10f/0x1e0 fs/open.c:1368
do_sys_open fs/open.c:1374 [inline]
__do_sys_openat fs/open.c:1390 [inline]
__se_sys_openat fs/open.c:1385 [inline]
__x64_sys_openat+0x12d/0x210 fs/open.c:1385
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff88802d5efc00
which belongs to the cache filp of size 352
The buggy address is located 344 bytes inside of
freed 352-byte region [ffff88802d5efc00, ffff88802d5efd60)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88802d5efc00 pfn:0x2d5ee
head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff8880284a0401
flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000240 ffff88801cee2500 ffffea0001e98d90 ffffea0001d23790
raw: ffff88802d5efc00 0000000800120011 00000000f5000000 ffff8880284a0401
head: 00fff00000000240 ffff88801cee2500 ffffea0001e98d90 ffffea0001d23790
head: ffff88802d5efc00 0000000800120011 00000000f5000000 ffff8880284a0401
head: 00fff00000000001 ffffffffffffff81 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000002
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 2399, tgid 2399 (kworker/u8:8), ts 17035210966, free_ts 0
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1859
prep_new_page mm/page_alloc.c:1867 [inline]
get_page_from_freelist+0xf48/0x3530 mm/page_alloc.c:3946
__alloc_frozen_pages_noprof+0x299/0x2dc0 mm/page_alloc.c:5304
alloc_slab_page mm/slub.c:3266 [inline]
allocate_slab mm/slub.c:3380 [inline]
new_slab+0xa2/0x640 mm/slub.c:3426
refill_objects+0xe3/0x410 mm/slub.c:7310
refill_sheaf mm/slub.c:2804 [inline]
__pcs_replace_empty_main+0x376/0x680 mm/slub.c:4675
alloc_from_pcs mm/slub.c:4773 [inline]
slab_alloc_node mm/slub.c:4905 [inline]
kmem_cache_alloc_noprof+0x46e/0x6a0 mm/slub.c:4931
alloc_empty_file+0x5b/0x1c0 fs/file_table.c:262
path_openat+0xe7/0x4280 fs/namei.c:4849
do_file_open+0x20e/0x430 fs/namei.c:4892
do_open_execat+0xd1/0x360 fs/exec.c:785
alloc_bprm+0x2d/0x9d0 fs/exec.c:1431
class_bprm_constructor fs/exec.c:1496 [inline]
kernel_execve+0x8f/0x3a0 fs/exec.c:1889
call_usermodehelper_exec_async+0x239/0x4b0 kernel/umh.c:109
ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
page_owner free stack trace missing
Memory state around the buggy address:
ffff88802d5efc00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88802d5efc80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88802d5efd00: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
^
ffff88802d5efd80: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
ffff88802d5efe00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
slab filp start ffff88802d5efc00 pointer offset 0 size 352
VFS: Close: file count is 0 (f_op=kernfs_file_fops)
------------[ cut here ]------------
kernel BUG at fs/open.c:1464!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 8586 Comm: syz.9.633 Tainted: G B L syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:filp_flush.cold+0x30/0x39 fs/open.c:1464
Code: 8d 7b 48 b8 ff ff 37 00 48 89 fa 48 c1 e0 2a 48 c1 ea 03 80 3c 02 00 75 13 48 8b 73 48 48 c7 c7 a0 95 e5 8b e8 19 54 fd ff 90 <0f> 0b e8 b1 ea 54 01 eb e6 e8 2a 5a e5 00 65 48 8b 2d 7a 69 3f 13
RSP: 0018:ffffc90004a87828 EFLAGS: 00010286
RAX: 0000000000000033 RBX: ffff88802d5efc00 RCX: 0000000000000000
RDX: 0000000000000033 RSI: ffffffff81e89e59 RDI: fffff52000950ef6
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 69662062616c7320 R12: e000000000000000
R13: bfffffffffffffff R14: ffff88803495a528 R15: 0000000000000002
FS: 00007f20447f66c0(0000) GS:ffff888123eda000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a4b9996008 CR3: 000000007e753000 CR4: 0000000000350ef0
Call Trace:
filp_close+0x1c/0x30 fs/open.c:1484
gaudio_close_snd_dev drivers/usb/gadget/function/u_uac1_legacy.c:263 [inline]
gaudio_cleanup+0x59/0x100 drivers/usb/gadget/function/u_uac1_legacy.c:305
f_audio_bind+0x56c/0x660 drivers/usb/gadget/function/f_uac1_legacy.c:792
usb_add_function+0x219/0x890 drivers/usb/gadget/composite.c:333
configfs_composite_bind+0xd83/0x1960 drivers/usb/gadget/configfs.c:1802
gadget_bind_driver+0x28c/0xbf0 drivers/usb/gadget/udc/core.c:1662
call_driver_probe drivers/base/dd.c:628 [inline]
really_probe+0x241/0xa60 drivers/base/dd.c:706
__driver_probe_device+0x20e/0x450 drivers/base/dd.c:868
driver_probe_device+0x4a/0x140 drivers/base/dd.c:898
__driver_attach+0x21f/0x5b0 drivers/base/dd.c:1292
bus_for_each_dev+0x13e/0x1d0 drivers/base/bus.c:383
bus_add_driver+0x305/0x5b0 drivers/base/bus.c:763
driver_register+0x1e2/0x360 drivers/base/driver.c:174
usb_gadget_register_driver_owner+0x132/0x210 drivers/usb/gadget/udc/core.c:1752
gadget_dev_desc_UDC_store+0x1b0/0x2e0 drivers/usb/gadget/configfs.c:300
flush_write_buffer fs/configfs/file.c:207 [inline]
configfs_write_iter+0x302/0x4e0 fs/configfs/file.c:229
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x6ac/0x1050 fs/read_write.c:687
ksys_write+0x12a/0x250 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f204659e019
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:00007f20447f6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f2046825fa0 RCX: 00007f204659e019
RDX: 000000000000000c RSI: 0000200000000280 RDI: 0000000000000003
RBP: 00007f204663500c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2046826038 R14: 00007f2046825fa0 R15: 00007ffe58c798e8
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:filp_flush.cold+0x30/0x39 fs/open.c:1464
Code: 8d 7b 48 b8 ff ff 37 00 48 89 fa 48 c1 e0 2a 48 c1 ea 03 80 3c 02 00 75 13 48 8b 73 48 48 c7 c7 a0 95 e5 8b e8 19 54 fd ff 90 <0f> 0b e8 b1 ea 54 01 eb e6 e8 2a 5a e5 00 65 48 8b 2d 7a 69 3f 13
RSP: 0018:ffffc90004a87828 EFLAGS: 00010286
RAX: 0000000000000033 RBX: ffff88802d5efc00 RCX: 0000000000000000
RDX: 0000000000000033 RSI: ffffffff81e89e59 RDI: fffff52000950ef6
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 69662062616c7320 R12: e000000000000000
R13: bfffffffffffffff R14: ffff88803495a528 R15: 0000000000000002
FS: 00007f20447f66c0(0000) GS:ffff888123dda000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055558a9cb4e8 CR3: 000000007e753000 CR4: 0000000000350ef0