loop4: detected capacity change from 0 to 1024 ================================================================== BUG: KASAN: use-after-free in hfsplus_btree_open+0x927/0xd10 fs/hfsplus/btree.c:155 Read of size 4 at addr ffff888098a4a1f4 by task syz-executor.4/15512 CPU: 0 PID: 15512 Comm: syz-executor.4 Not tainted 6.1.42-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15f/0x4f0 mm/kasan/report.c:395 kasan_report+0x136/0x160 mm/kasan/report.c:495 hfsplus_btree_open+0x927/0xd10 fs/hfsplus/btree.c:155 hfsplus_fill_super+0xaba/0x1c90 fs/hfsplus/super.c:473 mount_bdev+0x2c9/0x3f0 fs/super.c:1423 legacy_get_tree+0xeb/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1553 do_new_mount+0x28b/0xae0 fs/namespace.c:3040 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f6f5b07e22a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6f59bfdee8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f6f59bfdf80 RCX: 00007f6f5b07e22a RDX: 0000000020000000 RSI: 0000000020000140 RDI: 00007f6f59bfdf40 RBP: 0000000020000000 R08: 00007f6f59bfdf80 R09: 0000000000204010 R10: 0000000000204010 R11: 0000000000000202 R12: 0000000020000140 R13: 00007f6f59bfdf40 R14: 00000000000006d5 R15: 0000000020000080 Allocated by task 25745: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 __kasan_slab_alloc+0x65/0x70 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x50/0x370 mm/slab.h:737 slab_alloc_node mm/slub.c:3398 [inline] slab_alloc mm/slub.c:3406 [inline] __kmem_cache_alloc_lru mm/slub.c:3413 [inline] kmem_cache_alloc_lru+0x10c/0x2d0 mm/slub.c:3429 alloc_inode_sb include/linux/fs.h:3131 [inline] f2fs_alloc_inode+0x171/0x540 fs/f2fs/super.c:1366 alloc_inode fs/inode.c:259 [inline] iget_locked+0x1c8/0x830 fs/inode.c:1328 f2fs_iget+0x52/0x4ac0 fs/f2fs/inode.c:497 f2fs_fill_super+0x6037/0x7cb0 fs/f2fs/super.c:4341 mount_bdev+0x2c9/0x3f0 fs/super.c:1423 legacy_get_tree+0xeb/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1553 do_new_mount+0x28b/0xae0 fs/namespace.c:3040 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:486 call_rcu+0x163/0xa10 kernel/rcu/tree.c:2799 dispose_list fs/inode.c:697 [inline] evict_inodes+0x601/0x6a0 fs/inode.c:747 generic_shutdown_super+0x94/0x340 fs/super.c:480 kill_block_super+0x7a/0xe0 fs/super.c:1450 kill_f2fs_super+0x2ff/0x3c0 fs/f2fs/super.c:4612 deactivate_locked_super+0xa0/0x110 fs/super.c:332 cleanup_mnt+0x490/0x520 fs/namespace.c:1186 task_work_run+0x246/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:297 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd Second to last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:486 call_rcu+0x163/0xa10 kernel/rcu/tree.c:2799 __dentry_kill+0x436/0x650 fs/dcache.c:607 dentry_kill+0xbb/0x290 dput+0x1ef/0x420 fs/dcache.c:913 __fput+0x5e4/0x890 fs/file_table.c:328 task_work_run+0x246/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:297 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff888098a49ab8 which belongs to the cache f2fs_inode_cache of size 2152 The buggy address is located 1852 bytes inside of 2152-byte region [ffff888098a49ab8, ffff888098a4a320) The buggy address belongs to the physical page: page:ffffea0002629200 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888098a4ac88 pfn:0x98a48 head:ffffea0002629200 order:3 compound_mapcount:0 compound_pincount:0 memcg:ffff888079fb3901 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff888017b5a048 ffffea00025c3a08 ffff888147e8b3c0 raw: ffff888098a4ac88 00000000000e0002 00000001ffffffff ffff888079fb3901 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 19848, tgid 19844 (syz-executor.3), ts 1426545570370, free_ts 686432530003 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2533 prep_new_page mm/page_alloc.c:2540 [inline] get_page_from_freelist+0x32ed/0x3480 mm/page_alloc.c:4292 __alloc_pages+0x28d/0x770 mm/page_alloc.c:5559 alloc_slab_page+0x6a/0x150 mm/slub.c:1794 allocate_slab mm/slub.c:1939 [inline] new_slab+0x84/0x2d0 mm/slub.c:1992 ___slab_alloc+0xa71/0x1080 mm/slub.c:3180 __slab_alloc mm/slub.c:3279 [inline] slab_alloc_node mm/slub.c:3364 [inline] slab_alloc mm/slub.c:3406 [inline] __kmem_cache_alloc_lru mm/slub.c:3413 [inline] kmem_cache_alloc_lru+0x1a5/0x2d0 mm/slub.c:3429 alloc_inode_sb include/linux/fs.h:3131 [inline] f2fs_alloc_inode+0x171/0x540 fs/f2fs/super.c:1366 alloc_inode fs/inode.c:259 [inline] iget_locked+0x1c8/0x830 fs/inode.c:1328 f2fs_iget+0x52/0x4ac0 fs/f2fs/inode.c:497 f2fs_fill_super+0x6037/0x7cb0 fs/f2fs/super.c:4341 mount_bdev+0x2c9/0x3f0 fs/super.c:1423 legacy_get_tree+0xeb/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1553 do_new_mount+0x28b/0xae0 fs/namespace.c:3040 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3568 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1460 [inline] __free_pages_ok+0xcee/0xe20 mm/page_alloc.c:1716 io_ring_ctx_free+0x7c4/0xa0c io_uring/io_uring.c:2635 io_ring_exit_work+0x72a/0x794 io_uring/io_uring.c:2815 process_one_work+0x8aa/0x11f0 kernel/workqueue.c:2292 worker_thread+0xa5f/0x1210 kernel/workqueue.c:2439 kthread+0x26e/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Memory state around the buggy address: ffff888098a4a080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888098a4a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888098a4a180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888098a4a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888098a4a280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb 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