Hello, syzbot found the following issue on: HEAD commit: c3eb11fbb826 Merge tag 'pci-v6.1-fixes-3' of git://git.ker.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=15a7e1c9880000 kernel config: https://syzkaller.appspot.com/x/.config?x=8d01b6e3197974dd dashboard link: https://syzkaller.appspot.com/bug?extid=3969ffae9388a369bab8 compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1615d7e5880000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15f20981880000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/d81ac029767f/disk-c3eb11fb.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/b68346b5b73c/vmlinux-c3eb11fb.xz kernel image: https://storage.googleapis.com/syzbot-assets/410a61724587/bzImage-c3eb11fb.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/0b4c696f5585/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3969ffae9388a369bab8@xxxxxxxxxxxxxxxxxxxxxxxxx REISERFS (device loop0): Using r5 hash to sort names REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. ================================================================== BUG: KASAN: use-after-free in strlen+0x56/0x60 lib/string.c:495 Read of size 1 at addr ffff8880700f09cc by task syz-executor399/3632 CPU: 0 PID: 3632 Comm: syz-executor399 Not tainted 6.1.0-rc6-syzkaller-00015-gc3eb11fbb826 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 print_address_description+0x74/0x340 mm/kasan/report.c:284 print_report+0x107/0x1f0 mm/kasan/report.c:395 kasan_report+0xcd/0x100 mm/kasan/report.c:495 strlen+0x56/0x60 lib/string.c:495 _Z16__fortify_strlenPKcU17pass_object_size1 include/linux/fortify-string.h:196 [inline] set_de_name_and_namelen+0x378/0x5c0 fs/reiserfs/namei.c:82 search_by_entry_key+0x6ca/0xd20 fs/reiserfs/namei.c:172 reiserfs_readdir_inode+0x235/0x1410 fs/reiserfs/dir.c:98 iterate_dir+0x257/0x5f0 __do_sys_getdents64 fs/readdir.c:369 [inline] __se_sys_getdents64+0x1db/0x4c0 fs/readdir.c:354 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: 0033:0x7fb4f3debec9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffed0b87788 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 00007fb4f3e5bed0 RCX: 00007fb4f3debec9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007ffed0b87798 R08: 0000000000000001 R09: 0000000000000001 R10: 00000000000010e3 R11: 0000000000000246 R12: 00007ffed0b877c0 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> The buggy address belongs to the physical page: page:ffffea0001c03c00 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x700f0 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 ffffea0001c03c48 ffffea0001c03bc8 0000000000000000 raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 0, migratetype Movable, gfp_mask 0x8(__GFP_MOVABLE), pid 1, tgid 1 (swapper/0), ts 10266546633, free_ts 11631552401 split_map_pages+0x25b/0x540 mm/compaction.c:97 isolate_freepages_range+0x4ac/0x510 mm/compaction.c:735 alloc_contig_range+0x6a9/0x980 mm/page_alloc.c:9371 __alloc_contig_pages mm/page_alloc.c:9394 [inline] alloc_contig_pages+0x3c8/0x4e0 mm/page_alloc.c:9471 debug_vm_pgtable_alloc_huge_page+0xcd/0x11e mm/debug_vm_pgtable.c:1098 init_args+0xa3a/0xdba mm/debug_vm_pgtable.c:1221 debug_vm_pgtable+0x9a/0x4a6 mm/debug_vm_pgtable.c:1259 do_one_initcall+0x1c9/0x400 init/main.c:1303 do_initcall_level+0x168/0x218 init/main.c:1376 do_initcalls+0x4b/0x8c init/main.c:1392 kernel_init_freeable+0x428/0x5d5 init/main.c:1631 kernel_init+0x19/0x2b0 init/main.c:1519 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1459 [inline] free_pcp_prepare+0x80c/0x8f0 mm/page_alloc.c:1509 free_unref_page_prepare mm/page_alloc.c:3387 [inline] free_unref_page+0x7d/0x5f0 mm/page_alloc.c:3483 free_contig_range+0xa3/0x160 mm/page_alloc.c:9493 destroy_args+0xfe/0x935 mm/debug_vm_pgtable.c:1031 debug_vm_pgtable+0x44d/0x4a6 mm/debug_vm_pgtable.c:1354 do_one_initcall+0x1c9/0x400 init/main.c:1303 do_initcall_level+0x168/0x218 init/main.c:1376 do_initcalls+0x4b/0x8c init/main.c:1392 kernel_init_freeable+0x428/0x5d5 init/main.c:1631 kernel_init+0x19/0x2b0 init/main.c:1519 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Memory state around the buggy address: ffff8880700f0880: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8880700f0900: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff8880700f0980: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff8880700f0a00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8880700f0a80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
