================================================================== BUG: KASAN: invalid-free in f_uac2_opts_p_srate_store+0x1d4/0x260 drivers/usb/gadget/function/f_uac2.c:2087 Free of addr ffff88806380f62e by task syz.3.672/8451 CPU: 0 UID: 0 PID: 8451 Comm: syz.3.672 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 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_invalid_free+0xb8/0x190 mm/kasan/report.c:557 check_slab_allocation+0xe1/0xf0 mm/kasan/common.c:230 kasan_slab_pre_free include/linux/kasan.h:199 [inline] slab_free_hook mm/slub.c:2623 [inline] slab_free mm/slub.c:6372 [inline] kfree+0x1b6/0x6c0 mm/slub.c:6687 f_uac2_opts_p_srate_store+0x1d4/0x260 drivers/usb/gadget/function/f_uac2.c:2087 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+0x6af/0x1050 fs/read_write.c:687 ksys_write+0x12a/0x250 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0618f9e0d9 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:00007f0619df2028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f0619226180 RCX: 00007f0618f9e0d9 RDX: 000000000000000f RSI: 00002000000003c0 RDI: 000000000000000b RBP: 00007f0619035024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0619226218 R14: 00007f0619226180 R15: 00007ffdb796ab28 Allocated by task 8451: kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5337 [inline] __kmalloc_node_track_caller_noprof+0x333/0x830 mm/slub.c:5466 __kmemdup_nul mm/util.c:64 [inline] kstrdup+0x51/0xe0 mm/util.c:84 f_uac2_opts_p_srate_store+0x113/0x260 drivers/usb/gadget/function/f_uac2.c:2087 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+0x6af/0x1050 fs/read_write.c:687 ksys_write+0x12a/0x250 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88806380f620 which belongs to the cache kmalloc-16 of size 16 The buggy address is located 14 bytes inside of 16-byte region [ffff88806380f620, ffff88806380f630) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88806380fa60 pfn:0x6380f flags: 0xfff00000000200(workingset|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000200 ffff88801c042640 ffffea00012a3fd0 ffffea0001015850 raw: ffff88806380fa60 0000000800800055 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 5724, tgid 5724 (syz-executor), ts 87950128581 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1871 prep_new_page mm/page_alloc.c:1879 [inline] get_page_from_freelist+0x110d/0x35b0 mm/page_alloc.c:3943 __alloc_frozen_pages_noprof+0x2eb/0x3300 mm/page_alloc.c:5436 alloc_slab_page mm/slub.c:3267 [inline] allocate_slab mm/slub.c:3382 [inline] new_slab+0xa5/0x640 mm/slub.c:3428 refill_objects+0xe3/0x410 mm/slub.c:7305 refill_sheaf mm/slub.c:2805 [inline] __pcs_replace_empty_main+0x372/0x680 mm/slub.c:4677 alloc_from_pcs mm/slub.c:4775 [inline] slab_alloc_node mm/slub.c:4907 [inline] __do_kmalloc_node mm/slub.c:5336 [inline] __kvmalloc_node_noprof+0x791/0x970 mm/slub.c:6900 xt_jumpstack_alloc net/netfilter/x_tables.c:1449 [inline] do_replace_table+0x1c5/0x760 net/netfilter/x_tables.c:1486 xt_replace_table+0x2e/0x130 net/netfilter/x_tables.c:1545 __do_replace+0x1cf/0x980 net/ipv4/netfilter/ip_tables.c:1062 do_replace net/ipv4/netfilter/ip_tables.c:1139 [inline] do_ipt_set_ctl+0xa53/0xcf0 net/ipv4/netfilter/ip_tables.c:1634 nf_setsockopt+0x8d/0xf0 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0xcb/0xf0 net/ipv4/ip_sockglue.c:1424 tcp_setsockopt+0xa7/0x100 net/ipv4/tcp.c:4179 do_sock_setsockopt+0xf3/0x1d0 net/socket.c:2397 __sys_setsockopt+0x195/0x220 net/socket.c:2422 page last free pid 5724 tgid 5724 ts 87950072852 stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] __free_pages_prepare mm/page_alloc.c:1418 [inline] __free_frozen_pages+0x79f/0x10f0 mm/page_alloc.c:2962 ___free_pages_bulk mm/kasan/shadow.c:333 [inline] __kasan_populate_vmalloc_do mm/kasan/shadow.c:385 [inline] __kasan_populate_vmalloc+0x164/0x210 mm/kasan/shadow.c:424 kasan_populate_vmalloc include/linux/kasan.h:580 [inline] alloc_vmap_area+0x95d/0x2bb0 mm/vmalloc.c:2146 __get_vm_area_node+0x1ed/0x350 mm/vmalloc.c:3249 __vmalloc_node_range_noprof+0x262/0x1460 mm/vmalloc.c:4065 __vmalloc_node_noprof+0xad/0xf0 mm/vmalloc.c:4166 xt_counters_alloc+0x4c/0x70 net/netfilter/x_tables.c:1474 __do_replace+0x97/0x980 net/ipv4/netfilter/ip_tables.c:1044 do_replace net/ipv4/netfilter/ip_tables.c:1139 [inline] do_ipt_set_ctl+0xa53/0xcf0 net/ipv4/netfilter/ip_tables.c:1634 nf_setsockopt+0x8d/0xf0 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0xcb/0xf0 net/ipv4/ip_sockglue.c:1424 tcp_setsockopt+0xa7/0x100 net/ipv4/tcp.c:4179 do_sock_setsockopt+0xf3/0x1d0 net/socket.c:2397 __sys_setsockopt+0x195/0x220 net/socket.c:2422 __do_sys_setsockopt net/socket.c:2428 [inline] __se_sys_setsockopt net/socket.c:2425 [inline] __x64_sys_setsockopt+0xbd/0x160 net/socket.c:2425 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84 Memory state around the buggy address: ffff88806380f500: 00 04 fc fc fa fb fc fc fa fb fc fc fa fb fc fc ffff88806380f580: fa fb fc fc fa fb fc fc 00 04 fc fc 00 00 fc fc >ffff88806380f600: fa fb fc fc 00 00 fc fc 00 07 fc fc 00 01 fc fc ^ ffff88806380f680: fa fb fc fc 00 04 fc fc 00 06 fc fc 00 04 fc fc ffff88806380f700: 00 06 fc fc fa fb fc fc fa fb fc fc 00 00 fc fc ==================================================================