F2FS-fs (loop3): Start checkpoint disabled! F2FS-fs (loop3): f2fs_disable_checkpoint() finish, err:0 F2FS-fs (loop3): Try to recover 1th superblock, ret: 0 F2FS-fs (loop3): Mounted with checkpoint version = 48b305e6 ================================================================== 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 ffff8881138bde46 by task syz.3.215/1128 CPU: 1 PID: 1128 Comm: syz.3.215 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 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_uac2_opts_c_srate_store+0x220/0x2a0 drivers/usb/gadget/function/f_uac2.c:2082 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: 0033:0x7faf0759e0d9 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:00007faf08504028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007faf07825fa0 RCX: 00007faf0759e0d9 RDX: 0000000000000009 RSI: 00002000000004c0 RDI: 0000000000000005 RBP: 00007faf07635024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007faf07826038 R14: 00007faf07825fa0 R15: 00007ffecafae938 Allocated by task 1128: 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_uac2_opts_c_srate_store+0x11a/0x2a0 drivers/usb/gadget/function/f_uac2.c:2082 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 ffff8881138bde40 which belongs to the cache kmalloc-16 of size 16 The buggy address is located 6 bytes inside of 16-byte region [ffff8881138bde40, ffff8881138bde50) The buggy address belongs to the physical page: page:ffffea00044e2f40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1138bd flags: 0x4000000000000200(slab|zone=1) raw: 4000000000000200 dead000000000100 dead000000000122 ffff888100042480 raw: 0000000000000000 0000000080800080 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 401, tgid 397 (syz.0.22), ts 27379435680, free_ts 24759186136 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1f5/0x210 mm/page_alloc.c:2672 prep_new_page+0x1c/0x110 mm/page_alloc.c:2679 get_page_from_freelist+0x2ca9/0x2d20 mm/page_alloc.c:4586 __alloc_pages+0x1fa/0x610 mm/page_alloc.c:5930 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_track_caller+0xa1/0x1e0 mm/slab_common.c:958 memdup_user+0x2a/0xc0 mm/util.c:179 raw_alloc_io_data drivers/usb/gadget/legacy/raw_gadget.c:627 [inline] raw_ioctl_ep0_write drivers/usb/gadget/legacy/raw_gadget.c:718 [inline] raw_ioctl+0x1d2e/0x3180 drivers/usb/gadget/legacy/raw_gadget.c:1268 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0x12f/0x1b0 fs/ioctl.c:856 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:856 x64_sys_call+0x58b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1580 [inline] free_pcp_prepare mm/page_alloc.c:1654 [inline] free_unref_page_prepare+0x80c/0x820 mm/page_alloc.c:3621 free_unref_page+0x93/0x530 mm/page_alloc.c:3719 free_the_page mm/page_alloc.c:863 [inline] __free_pages+0x67/0x100 mm/page_alloc.c:6020 __free_slab+0xc7/0x1a0 mm/slub.c:2044 free_slab mm/slub.c:2059 [inline] discard_slab+0x29/0x40 mm/slub.c:2065 __slab_free+0x201/0x280 mm/slub.c:3625 do_slab_free mm/slub.c:3666 [inline] ___cache_free+0xbf/0xd0 mm/slub.c:3722 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0xc6/0x140 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x14a/0x170 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x24/0x80 mm/kasan/common.c:311 kasan_slab_alloc include/linux/kasan.h:202 [inline] slab_post_alloc_hook+0x4f/0x2d0 mm/slab.h:768 slab_alloc_node mm/slub.c:3382 [inline] slab_alloc mm/slub.c:3392 [inline] __kmem_cache_alloc_lru mm/slub.c:3399 [inline] kmem_cache_alloc+0x166/0x320 mm/slub.c:3408 getname_flags+0xba/0x510 fs/namei.c:139 user_path_at_empty+0x2f/0x1c0 fs/namei.c:2911 do_readlinkat+0xd9/0x490 fs/stat.c:468 __do_sys_readlink fs/stat.c:501 [inline] __se_sys_readlink fs/stat.c:498 [inline] __x64_sys_readlink+0x7f/0x90 fs/stat.c:498 Memory state around the buggy address: ffff8881138bdd00: fa fb fc fc fb fb fc fc fb fb fc fc fb fb fc fc ffff8881138bdd80: fb fb fc fc fa fb fc fc 00 01 fc fc 00 00 fc fc >ffff8881138bde00: fa fb fc fc 00 01 fc fc 00 02 fc fc fa fb fc fc ^ ffff8881138bde80: fa fb fc fc 00 01 fc fc fa fb fc fc fa fb fc fc ffff8881138bdf00: fa fb fc fc fb fb fc fc fb fb fc fc fa fb fc fc ==================================================================