================================================================== BUG: KASAN: slab-out-of-bounds in copy_to_urb+0x255/0x440 sound/usb/pcm.c:1437 Write of size 264 at addr ffff88805fbc9500 by task syz.6.2270/16290 CPU: 0 PID: 16290 Comm: syz.6.2270 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xac/0x220 mm/kasan/report.c:468 kasan_report+0x117/0x150 mm/kasan/report.c:581 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x288/0x290 mm/kasan/generic.c:187 __asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106 copy_to_urb+0x255/0x440 sound/usb/pcm.c:1437 prepare_playback_urb+0x932/0x1360 sound/usb/pcm.c:1565 prepare_outbound_urb+0x372/0xc40 sound/usb/endpoint.c:336 snd_usb_endpoint_start+0x4d9/0x1440 sound/usb/endpoint.c:1618 start_endpoints+0xa1/0x270 sound/usb/pcm.c:273 snd_usb_substream_playback_trigger+0x3e0/0x7a0 sound/usb/pcm.c:1669 snd_pcm_do_start+0xb1/0x170 sound/core/pcm_native.c:1443 snd_pcm_action_single sound/core/pcm_native.c:1293 [inline] snd_pcm_action+0xda/0x230 sound/core/pcm_native.c:1376 __snd_pcm_lib_xfer+0x16fa/0x1c40 sound/core/pcm_lib.c:2341 snd_pcm_oss_write3+0x1bc/0x320 sound/core/oss/pcm_oss.c:1252 snd_pcm_plug_write_transfer+0x2b8/0x4a0 sound/core/oss/pcm_plugin.c:630 snd_pcm_oss_write2 sound/core/oss/pcm_oss.c:1384 [inline] snd_pcm_oss_write1 sound/core/oss/pcm_oss.c:1450 [inline] snd_pcm_oss_write+0xbb5/0x1120 sound/core/oss/pcm_oss.c:2810 vfs_write+0x288/0x940 fs/read_write.c:582 ksys_write+0x147/0x250 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f608458f749 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6085399038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f60847e5fa0 RCX: 00007f608458f749 RDX: 00000000000005ce RSI: 0000200000000640 RDI: 0000000000000004 RBP: 00007f6084613f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f60847e6038 R14: 00007f60847e5fa0 R15: 00007ffff8061cf8 Allocated by task 16290: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4e/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:198 [inline] __do_kmalloc_node mm/slab_common.c:1007 [inline] __kmalloc+0xb4/0x240 mm/slab_common.c:1020 data_ep_set_params sound/usb/endpoint.c:1263 [inline] snd_usb_endpoint_set_params+0x1575/0x28e0 sound/usb/endpoint.c:1395 snd_usb_hw_params+0x123e/0x19c0 sound/usb/pcm.c:569 snd_pcm_hw_params+0x835/0x1c50 sound/core/pcm_native.c:779 snd_pcm_oss_change_params_locked+0x2144/0x3d30 sound/core/oss/pcm_oss.c:976 snd_pcm_oss_make_ready_locked sound/core/oss/pcm_oss.c:1197 [inline] snd_pcm_oss_write1 sound/core/oss/pcm_oss.c:1415 [inline] snd_pcm_oss_write+0x2ff/0x1120 sound/core/oss/pcm_oss.c:2810 vfs_write+0x288/0x940 fs/read_write.c:582 ksys_write+0x147/0x250 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Last potentially related work creation: kasan_save_stack+0x3e/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:492 kvfree_call_rcu+0xee/0x780 kernel/rcu/tree.c:3452 kernfs_unlink_open_file+0x414/0x4c0 fs/kernfs/file.c:653 kernfs_fop_release+0x12e/0x190 fs/kernfs/file.c:825 __fput+0x234/0x970 fs/file_table.c:384 __do_sys_close fs/open.c:1571 [inline] __se_sys_close+0x15f/0x220 fs/open.c:1556 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 The buggy address belongs to the object at ffff88805fbc9500 which belongs to the cache kmalloc-128 of size 128 The buggy address is located 0 bytes inside of allocated 120-byte region [ffff88805fbc9500, ffff88805fbc9578) The buggy address belongs to the physical page: page:ffffea00017ef240 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5fbc9 flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000800 ffff8880178418c0 dead000000000100 dead000000000122 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 0x112820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 13181, tgid 13176 (syz.4.1524), ts 1083605105499, free_ts 1077202353233 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1cd/0x210 mm/page_alloc.c:1554 prep_new_page mm/page_alloc.c:1561 [inline] get_page_from_freelist+0x195c/0x19f0 mm/page_alloc.c:3191 __alloc_pages+0x1e3/0x460 mm/page_alloc.c:4457 alloc_slab_page+0x5d/0x170 mm/slub.c:1881 allocate_slab mm/slub.c:2028 [inline] new_slab+0x87/0x2e0 mm/slub.c:2081 ___slab_alloc+0xc6d/0x1300 mm/slub.c:3253 __slab_alloc mm/slub.c:3339 [inline] __slab_alloc_node mm/slub.c:3392 [inline] slab_alloc_node mm/slub.c:3485 [inline] __kmem_cache_alloc_node+0x1a2/0x260 mm/slub.c:3534 __do_kmalloc_node mm/slab_common.c:1006 [inline] __kmalloc+0xa4/0x240 mm/slab_common.c:1020 kmalloc include/linux/slab.h:604 [inline] kzalloc include/linux/slab.h:721 [inline] hash_ipportnet6_add+0x126b/0x2e90 net/netfilter/ipset/ip_set_hash_gen.h:880 hash_ipportnet6_uadt+0xa2b/0xd90 net/netfilter/ipset/ip_set_hash_ipportnet.c:504 call_ad+0x378/0xae0 net/netfilter/ipset/ip_set_core.c:1751 ip_set_ad+0x787/0x930 net/netfilter/ipset/ip_set_core.c:1841 nfnetlink_rcv_msg+0xb49/0x1130 net/netfilter/nfnetlink.c:302 netlink_rcv_skb+0x216/0x480 net/netlink/af_netlink.c:2545 nfnetlink_rcv+0x274/0x2180 net/netfilter/nfnetlink.c:659 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x751/0x8d0 net/netlink/af_netlink.c:1346 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1154 [inline] free_unref_page_prepare+0x7ce/0x8e0 mm/page_alloc.c:2336 free_unref_page+0x32/0x2e0 mm/page_alloc.c:2429 __slab_free+0x35e/0x410 mm/slub.c:3736 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x75/0xe0 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x143/0x160 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook+0x6e/0x4d0 mm/slab.h:767 slab_alloc_node mm/slub.c:3495 [inline] slab_alloc mm/slub.c:3503 [inline] __kmem_cache_alloc_lru mm/slub.c:3510 [inline] kmem_cache_alloc+0x11e/0x2e0 mm/slub.c:3519 ptlock_alloc mm/memory.c:6155 [inline] ptlock_init include/linux/mm.h:2964 [inline] pmd_ptlock_init include/linux/mm.h:3064 [inline] pagetable_pmd_ctor include/linux/mm.h:3102 [inline] pmd_alloc_one include/asm-generic/pgalloc.h:137 [inline] __pmd_alloc+0x116/0x880 mm/memory.c:5577 pmd_alloc include/linux/mm.h:2863 [inline] __handle_mm_fault mm/memory.c:5127 [inline] handle_mm_fault+0xb3d/0x4920 mm/memory.c:5331 do_user_addr_fault+0x738/0x12e0 arch/x86/mm/fault.c:1373 handle_page_fault arch/x86/mm/fault.c:1465 [inline] exc_page_fault+0x67/0x110 arch/x86/mm/fault.c:1521 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:608 Memory state around the buggy address: ffff88805fbc9400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc ffff88805fbc9480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88805fbc9500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc ^ ffff88805fbc9580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88805fbc9600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================