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 ffff88803f12b394 by task syz-executor.4/13635 CPU: 1 PID: 13635 Comm: syz-executor.4 Not tainted 6.1.76-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 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:1432 legacy_get_tree+0xeb/0x180 fs/fs_context.c:632 vfs_get_tree+0x88/0x270 fs/super.c:1562 do_new_mount+0x2ba/0xb40 fs/namespace.c:3051 do_mount fs/namespace.c:3394 [inline] __do_sys_mount fs/namespace.c:3602 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3579 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f940347f4aa 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:00007f9404126ef8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f9404126f80 RCX: 00007f940347f4aa RDX: 0000000020000140 RSI: 0000000020000180 RDI: 00007f9404126f40 RBP: 0000000020000140 R08: 00007f9404126f80 R09: 0000000000004008 R10: 0000000000004008 R11: 0000000000000202 R12: 0000000020000180 R13: 00007f9404126f40 R14: 0000000000000696 R15: 00000000200001c0 Allocated by task 7389: 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+0x52/0x3a0 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:3177 [inline] f2fs_alloc_inode+0x171/0x540 fs/f2fs/super.c:1400 alloc_inode fs/inode.c:261 [inline] iget_locked+0x1c8/0x830 fs/inode.c:1330 f2fs_iget+0x52/0x4a30 fs/f2fs/inode.c:503 f2fs_fill_super+0x5ecc/0x7c40 fs/f2fs/super.c:4367 mount_bdev+0x2c9/0x3f0 fs/super.c:1432 legacy_get_tree+0xeb/0x180 fs/fs_context.c:632 vfs_get_tree+0x88/0x270 fs/super.c:1562 do_new_mount+0x2ba/0xb40 fs/namespace.c:3051 do_mount fs/namespace.c:3394 [inline] __do_sys_mount fs/namespace.c:3602 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3579 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 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:2844 f2fs_fill_super+0x62af/0x7c40 fs/f2fs/super.c:4550 mount_bdev+0x2c9/0x3f0 fs/super.c:1432 legacy_get_tree+0xeb/0x180 fs/fs_context.c:632 vfs_get_tree+0x88/0x270 fs/super.c:1562 do_new_mount+0x2ba/0xb40 fs/namespace.c:3051 do_mount fs/namespace.c:3394 [inline] __do_sys_mount fs/namespace.c:3602 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3579 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88803f12ac60 which belongs to the cache f2fs_inode_cache of size 2144 The buggy address is located 1844 bytes inside of 2144-byte region [ffff88803f12ac60, ffff88803f12b4c0) The buggy address belongs to the physical page: page:ffffea0000fc4a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88803f128000 pfn:0x3f128 head:ffffea0000fc4a00 order:3 compound_mapcount:0 compound_pincount:0 memcg:ffff888028102001 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000001 ffff8880173f3000 raw: ffff88803f128000 00000000800e0001 00000001ffffffff ffff888028102001 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 7346, tgid 7345 (syz-executor.4), ts 458891480784, free_ts 0 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2513 prep_new_page mm/page_alloc.c:2520 [inline] get_page_from_freelist+0x31a1/0x3320 mm/page_alloc.c:4279 __alloc_pages+0x28d/0x770 mm/page_alloc.c:5545 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+0xc20/0x1270 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:3177 [inline] f2fs_alloc_inode+0x171/0x540 fs/f2fs/super.c:1400 alloc_inode fs/inode.c:261 [inline] new_inode_pseudo+0x61/0x1d0 fs/inode.c:1020 new_inode+0x25/0x1d0 fs/inode.c:1048 f2fs_new_inode+0x11d/0x1020 fs/f2fs/namei.c:191 f2fs_mkdir+0x123/0x520 fs/f2fs/namei.c:760 vfs_mkdir+0x3b6/0x590 fs/namei.c:4108 do_mkdirat+0x225/0x360 fs/namei.c:4133 __do_sys_mkdirat fs/namei.c:4148 [inline] __se_sys_mkdirat fs/namei.c:4146 [inline] __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4146 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 page_owner free stack trace missing Memory state around the buggy address: ffff88803f12b280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88803f12b300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88803f12b380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88803f12b400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88803f12b480: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ==================================================================