syzbot has found a reproducer for the following issue on: HEAD commit: 70d201a40823 Merge tag 'f2fs-for-6.8-rc1' of git://git.ker.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=176d9debe80000 kernel config: https://syzkaller.appspot.com/x/.config?x=4607bc15d1c4bb90 dashboard link: https://syzkaller.appspot.com/bug?extid=8f477ac014ff5b32d81f compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=112b660be80000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14c1df5de80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/4faf0f99e43c/disk-70d201a4.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/23f59e40d2ef/vmlinux-70d201a4.xz kernel image: https://storage.googleapis.com/syzbot-assets/a0bc6007f0a4/bzImage-70d201a4.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/cf767215e29c/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8f477ac014ff5b32d81f@xxxxxxxxxxxxxxxxxxxxxxxxx loop0: detected capacity change from 0 to 63271 F2FS-fs (loop0): Mismatch start address, segment0(512) cp_blkaddr(605) F2FS-fs (loop0): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop0): invalid crc value F2FS-fs (loop0): SIT is corrupted node# 0 vs 1 F2FS-fs (loop0): Failed to initialize F2FS segment manager (-117) ================================================================== BUG: KASAN: slab-use-after-free in destroy_device_list fs/f2fs/super.c:1606 [inline] BUG: KASAN: slab-use-after-free in kill_f2fs_super+0x618/0x690 fs/f2fs/super.c:4932 Read of size 4 at addr ffff888023bdd77c by task syz-executor275/5046 CPU: 0 PID: 5046 Comm: syz-executor275 Not tainted 6.7.0-syzkaller-06264-g70d201a40823 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:377 [inline] print_report+0x163/0x540 mm/kasan/report.c:488 kasan_report+0x142/0x170 mm/kasan/report.c:601 destroy_device_list fs/f2fs/super.c:1606 [inline] kill_f2fs_super+0x618/0x690 fs/f2fs/super.c:4932 deactivate_locked_super+0xc1/0x130 fs/super.c:477 mount_bdev+0x222/0x2d0 fs/super.c:1665 legacy_get_tree+0xef/0x190 fs/fs_context.c:662 vfs_get_tree+0x8c/0x2a0 fs/super.c:1784 do_new_mount+0x2be/0xb40 fs/namespace.c:3352 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fb05d646c7a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffedf4214a8 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffedf4214c0 RCX: 00007fb05d646c7a RDX: 00000000200000c0 RSI: 0000000020007f80 RDI: 00007ffedf4214c0 RBP: 0000000000000010 R08: 00007ffedf421500 R09: 0000000000007e73 R10: 0000000000000010 R11: 0000000000000286 R12: 0000000000000004 R13: 00007ffedf421500 R14: 0000000000000003 R15: 0000000001ee4e54 </TASK> Allocated by task 5046: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x70 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:372 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:389 kasan_kmalloc include/linux/kasan.h:211 [inline] kmalloc_trace+0x1d6/0x360 mm/slub.c:4012 kmalloc include/linux/slab.h:590 [inline] kzalloc include/linux/slab.h:711 [inline] f2fs_fill_super+0xce/0x8170 fs/f2fs/super.c:4397 mount_bdev+0x206/0x2d0 fs/super.c:1663 legacy_get_tree+0xef/0x190 fs/fs_context.c:662 vfs_get_tree+0x8c/0x2a0 fs/super.c:1784 do_new_mount+0x2be/0xb40 fs/namespace.c:3352 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b Freed by task 5046: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x70 mm/kasan/common.c:68 kasan_save_free_info+0x4e/0x60 mm/kasan/generic.c:634 poison_slab_object+0xa6/0xe0 mm/kasan/common.c:241 __kasan_slab_free+0x34/0x60 mm/kasan/common.c:257 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2121 [inline] slab_free mm/slub.c:4299 [inline] kfree+0x14a/0x380 mm/slub.c:4409 f2fs_fill_super+0x6b04/0x8170 fs/f2fs/super.c:4882 mount_bdev+0x206/0x2d0 fs/super.c:1663 legacy_get_tree+0xef/0x190 fs/fs_context.c:662 vfs_get_tree+0x8c/0x2a0 fs/super.c:1784 do_new_mount+0x2be/0xb40 fs/namespace.c:3352 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b The buggy address belongs to the object at ffff888023bdc000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 6012 bytes inside of freed 8192-byte region [ffff888023bdc000, ffff888023bde000) The buggy address belongs to the physical page: page:ffffea00008ef600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x23bd8 head:ffffea00008ef600 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000840 ffff888012c42280 0000000000000000 0000000000000001 raw: 0000000000000000 0000000080020002 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4713, tgid 4713 (start-stop-daem), ts 38918540171, free_ts 38307438771 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1533 prep_new_page mm/page_alloc.c:1540 [inline] get_page_from_freelist+0x33ea/0x3570 mm/page_alloc.c:3311 __alloc_pages+0x255/0x680 mm/page_alloc.c:4567 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page+0x5f/0x160 mm/slub.c:2190 allocate_slab mm/slub.c:2354 [inline] new_slab+0x84/0x2f0 mm/slub.c:2407 ___slab_alloc+0xd17/0x13d0 mm/slub.c:3540 __slab_alloc mm/slub.c:3625 [inline] __slab_alloc_node mm/slub.c:3678 [inline] slab_alloc_node mm/slub.c:3850 [inline] kmalloc_trace+0x25d/0x360 mm/slub.c:4007 kmalloc include/linux/slab.h:590 [inline] kzalloc include/linux/slab.h:711 [inline] tomoyo_print_bprm security/tomoyo/audit.c:26 [inline] tomoyo_init_log+0x11cd/0x2040 security/tomoyo/audit.c:264 tomoyo_supervisor+0x386/0x11f0 security/tomoyo/common.c:2089 tomoyo_audit_env_log security/tomoyo/environ.c:36 [inline] tomoyo_env_perm+0x178/0x210 security/tomoyo/environ.c:63 tomoyo_environ security/tomoyo/domain.c:672 [inline] tomoyo_find_next_domain+0x1383/0x1cf0 security/tomoyo/domain.c:878 tomoyo_bprm_check_security+0x114/0x170 security/tomoyo/tomoyo.c:102 security_bprm_check+0x63/0xa0 security/security.c:1187 search_binary_handler fs/exec.c:1725 [inline] exec_binprm fs/exec.c:1779 [inline] bprm_execve+0x95f/0x18a0 fs/exec.c:1854 do_execveat_common+0x580/0x720 fs/exec.c:1962 do_execve fs/exec.c:2036 [inline] __do_sys_execve fs/exec.c:2112 [inline] __se_sys_execve fs/exec.c:2107 [inline] __x64_sys_execve+0x92/0xa0 fs/exec.c:2107 page last free pid 4699 tgid 4699 stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1140 [inline] free_unref_page_prepare+0x959/0xa80 mm/page_alloc.c:2346 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2486 discard_slab mm/slub.c:2453 [inline] __put_partials+0xeb/0x130 mm/slub.c:2922 put_cpu_partial+0x17b/0x250 mm/slub.c:2997 __slab_free+0x2fe/0x410 mm/slub.c:4166 qlink_free mm/kasan/quarantine.c:160 [inline] qlist_free_all+0x6d/0xd0 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x14b/0x160 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x23/0x70 mm/kasan/common.c:324 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3813 [inline] slab_alloc_node mm/slub.c:3860 [inline] __do_kmalloc_node mm/slub.c:3980 [inline] __kmalloc+0x1dd/0x490 mm/slub.c:3994 kmalloc include/linux/slab.h:594 [inline] tomoyo_add_entry security/tomoyo/common.c:2023 [inline] tomoyo_supervisor+0xe06/0x11f0 security/tomoyo/common.c:2095 tomoyo_audit_net_log security/tomoyo/network.c:367 [inline] tomoyo_audit_unix_log security/tomoyo/network.c:406 [inline] tomoyo_unix_entry security/tomoyo/network.c:574 [inline] tomoyo_check_unix_address+0x59b/0x880 security/tomoyo/network.c:605 tomoyo_socket_bind_permission+0x21c/0x340 security/tomoyo/network.c:744 security_socket_bind+0x71/0xa0 security/security.c:4424 __sys_bind+0x1ba/0x2e0 net/socket.c:1843 __do_sys_bind net/socket.c:1858 [inline] __se_sys_bind net/socket.c:1856 [inline] __x64_sys_bind+0x7a/0x90 net/socket.c:1856 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x230 arch/x86/entry/common.c:83 Memory state around the buggy address: ffff888023bdd600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888023bdd680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888023bdd700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888023bdd780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888023bdd800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.
