IPVS: ftp: loaded support on port[0] = 21 ================================================================== BUG: KASAN: use-after-free in hfsplus_releasepage+0x4bc/0x540 fs/hfsplus/inode.c:91 Read of size 4 at addr ffff8880b33f0ab8 by task syz-executor537/8098 CPU: 0 PID: 8098 Comm: syz-executor537 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354 kasan_report mm/kasan/report.c:412 [inline] __asan_report_load4_noabort+0x88/0x90 mm/kasan/report.c:432 hfsplus_releasepage+0x4bc/0x540 fs/hfsplus/inode.c:91 try_to_release_page+0x242/0x390 mm/filemap.c:3358 block_invalidatepage+0x45b/0x4f0 fs/buffer.c:1511 do_invalidatepage mm/truncate.c:165 [inline] truncate_cleanup_page+0x2b7/0x430 mm/truncate.c:184 truncate_inode_pages_range+0x528/0x1b00 mm/truncate.c:364 hfsplus_evict_inode+0x16/0xd0 fs/hfsplus/super.c:167 evict+0x2ed/0x760 fs/inode.c:559 iput_final fs/inode.c:1555 [inline] iput+0x4f1/0x860 fs/inode.c:1581 hfsplus_put_super+0x270/0x3f0 fs/hfsplus/super.c:301 generic_shutdown_super+0x144/0x370 fs/super.c:456 kill_block_super+0x97/0xf0 fs/super.c:1185 deactivate_locked_super+0x94/0x160 fs/super.c:329 deactivate_super+0x174/0x1a0 fs/super.c:360 cleanup_mnt+0x1a8/0x290 fs/namespace.c:1098 task_work_run+0x148/0x1c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0xbf3/0x2be0 kernel/exit.c:870 do_group_exit+0x125/0x310 kernel/exit.c:967 __do_sys_exit_group kernel/exit.c:978 [inline] __se_sys_exit_group kernel/exit.c:976 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:976 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fc0a619c9a9 Code: Bad RIP value. RSP: 002b:00007ffe06821d78 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007fc0a6212330 RCX: 00007fc0a619c9a9 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00000000000005f2 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc0a6212330 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 Allocated by task 8098: kmem_cache_alloc_trace+0x12f/0x380 mm/slab.c:3625 kmalloc include/linux/slab.h:515 [inline] kzalloc include/linux/slab.h:709 [inline] hfsplus_btree_open+0x4d/0x10a0 fs/hfsplus/btree.c:142 hfsplus_fill_super+0xa2d/0x19e0 fs/hfsplus/super.c:473 mount_bdev+0x2fc/0x3b0 fs/super.c:1158 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 8098: __cache_free mm/slab.c:3503 [inline] kfree+0xcc/0x210 mm/slab.c:3822 hfsplus_btree_close+0x1a6/0x300 fs/hfsplus/btree.c:279 hfsplus_put_super+0x220/0x3f0 fs/hfsplus/super.c:299 generic_shutdown_super+0x144/0x370 fs/super.c:456 kill_block_super+0x97/0xf0 fs/super.c:1185 deactivate_locked_super+0x94/0x160 fs/super.c:329 deactivate_super+0x174/0x1a0 fs/super.c:360 cleanup_mnt+0x1a8/0x290 fs/namespace.c:1098 task_work_run+0x148/0x1c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0xbf3/0x2be0 kernel/exit.c:870 do_group_exit+0x125/0x310 kernel/exit.c:967 __do_sys_exit_group kernel/exit.c:978 [inline] __se_sys_exit_group kernel/exit.c:976 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:976 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8880b33f0a80 which belongs to the cache kmalloc-4096 of size 4096 The buggy address is located 56 bytes inside of 4096-byte region [ffff8880b33f0a80, ffff8880b33f1a80) The buggy address belongs to the page: page:ffffea0002ccfc00 count:1 mapcount:0 mapping:ffff88813bff0dc0 index:0x0 compound_mapcount: 0 flags: 0xfff00000008100(slab|head) raw: 00fff00000008100 ffffea0002cb9188 ffffea0002cc3c88 ffff88813bff0dc0 raw: 0000000000000000 ffff8880b33f0a80 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880b33f0980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880b33f0a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880b33f0a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880b33f0b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880b33f0b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================