================================================================== BUG: KASAN: invalid-free in slab_free mm/slub.c:3712 [inline] BUG: KASAN: invalid-free in __kmem_cache_free+0xb7/0x1b0 mm/slub.c:3728 Free of addr ffff88811d642413 by task syz.2.17/480 CPU: 1 PID: 480 Comm: syz.2.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 Call Trace: __dump_stack+0x21/0x24 lib/dump_stack.c:88 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106 print_address_description+0x71/0x200 mm/kasan/report.c:316 print_report+0x4a/0x60 mm/kasan/report.c:420 kasan_report_invalid_free+0xd5/0xf0 mm/kasan/report.c:489 ____kasan_slab_free+0x14f/0x180 mm/kasan/common.c:-1 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:250 kasan_slab_free include/linux/kasan.h:178 [inline] slab_free_hook mm/slub.c:1750 [inline] slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1776 slab_free mm/slub.c:3712 [inline] __kmem_cache_free+0xb7/0x1b0 mm/slub.c:3728 kfree+0x6f/0xf0 mm/slab_common.c:990 f_uac1_opts_c_srate_store+0x220/0x2a0 drivers/usb/gadget/function/f_uac1.c:1593 flush_write_buffer fs/configfs/file.c:207 [inline] configfs_write_iter+0x323/0x410 fs/configfs/file.c:229 call_write_iter include/linux/fs.h:2282 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x5ef/0xd00 fs/read_write.c:584 ksys_write+0x14a/0x260 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __x64_sys_write+0x7b/0x90 fs/read_write.c:646 x64_sys_call+0x27b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:2 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f072c39e159 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:00007f072d2c3028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f072c625fa0 RCX: 00007f072c39e159 RDX: 0000000000000029 RSI: 0000200000000040 RDI: 0000000000000003 RBP: 00007f072c43503b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f072c626038 R14: 00007f072c625fa0 R15: 00007ffd4b0cae98 Allocated by task 480: kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:53 kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505 ____kasan_kmalloc mm/kasan/common.c:380 [inline] __kasan_kmalloc+0x95/0xb0 mm/kasan/common.c:389 kasan_kmalloc include/linux/kasan.h:212 [inline] __do_kmalloc_node mm/slab_common.c:938 [inline] __kmalloc_node_track_caller+0xb1/0x1e0 mm/slab_common.c:958 kstrdup+0x3b/0x80 mm/util.c:66 f_uac1_opts_c_srate_store+0x11a/0x2a0 drivers/usb/gadget/function/f_uac1.c:1593 flush_write_buffer fs/configfs/file.c:207 [inline] configfs_write_iter+0x323/0x410 fs/configfs/file.c:229 call_write_iter include/linux/fs.h:2282 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x5ef/0xd00 fs/read_write.c:584 ksys_write+0x14a/0x260 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __x64_sys_write+0x7b/0x90 fs/read_write.c:646 x64_sys_call+0x27b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:2 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 The buggy address belongs to the object at ffff88811d642400 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 19 bytes inside of 64-byte region [ffff88811d642400, ffff88811d642440) The buggy address belongs to the physical page: page:ffffea0004759080 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11d642 flags: 0x4000000000000200(slab|zone=1) raw: 4000000000000200 0000000000000000 dead000000000122 ffff888100042780 raw: 0000000000000000 0000000080200020 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 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 475, tgid 475 (syz-executor), ts 43225678352, free_ts 43225503342 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1f5/0x210 mm/page_alloc.c:2673 prep_new_page+0x1c/0x110 mm/page_alloc.c:2680 get_page_from_freelist+0x2ca9/0x2d20 mm/page_alloc.c:4587 __alloc_pages+0x1fa/0x610 mm/page_alloc.c:5931 alloc_slab_page+0x6e/0xf0 include/linux/gfp.h:-1 allocate_slab mm/slub.c:1967 [inline] new_slab+0x98/0x3e0 mm/slub.c:2020 ___slab_alloc+0x70f/0xb70 mm/slub.c:3177 __slab_alloc+0x5e/0xa0 mm/slub.c:3263 slab_alloc_node mm/slub.c:3348 [inline] __kmem_cache_alloc_node+0x204/0x2d0 mm/slub.c:3423 __do_kmalloc_node mm/slab_common.c:937 [inline] __kmalloc_node+0xa2/0x1e0 mm/slab_common.c:945 kmalloc_node include/linux/slab.h:589 [inline] kvmalloc_node+0x28a/0x460 mm/util.c:592 kvmalloc include/linux/slab.h:716 [inline] simple_xattr_alloc+0x43/0xa0 fs/xattr.c:1008 shmem_initxattrs+0x8d/0x1e0 mm/shmem.c:3294 security_inode_init_security+0x295/0x3c0 security/security.c:1134 shmem_mknod+0xb8/0x1d0 mm/shmem.c:2951 shmem_mkdir+0x2f/0x60 mm/shmem.c:3000 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1581 [inline] free_pcp_prepare mm/page_alloc.c:1655 [inline] free_unref_page_prepare+0x81b/0x820 mm/page_alloc.c:3622 free_unref_page+0x93/0x530 mm/page_alloc.c:3720 free_the_page mm/page_alloc.c:863 [inline] __free_pages+0x67/0x100 mm/page_alloc.c:6021 free_pages+0x82/0x90 mm/page_alloc.c:6032 selinux_genfs_get_sid+0x20b/0x250 security/selinux/hooks.c:1309 inode_doinit_with_dentry+0x884/0xd90 security/selinux/hooks.c:1504 sb_finish_set_opts+0x6ef/0xa10 security/selinux/hooks.c:555 selinux_set_mnt_opts+0x12eb/0x17a0 security/selinux/hooks.c:830 security_sb_set_mnt_opts+0x83/0xe0 security/security.c:1012 vfs_get_tree+0x15f/0x270 fs/super.c:1603 do_new_mount+0x251/0xb40 fs/namespace.c:3081 path_mount+0x640/0xfd0 fs/namespace.c:3411 do_mount fs/namespace.c:3424 [inline] __do_sys_mount fs/namespace.c:3632 [inline] __se_sys_mount+0x320/0x390 fs/namespace.c:3609 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3609 x64_sys_call+0x65d/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 Memory state around the buggy address: ffff88811d642300: 00 00 00 00 00 00 00 03 fc fc fc fc fc fc fc fc ffff88811d642380: 00 00 00 00 00 00 00 03 fc fc fc fc fc fc fc fc >ffff88811d642400: 00 00 00 00 00 02 fc fc fc fc fc fc fc fc fc fc ^ ffff88811d642480: 00 00 00 00 00 00 00 03 fc fc fc fc fc fc fc fc ffff88811d642500: 00 00 00 00 00 00 00 03 fc fc fc fc fc fc fc fc 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