[syzbot] [ocfs2?] WARNING in __ocfs2_decrease_refcount
syzbot <[email protected]>
| Newsgroups | dev.linux.lists.ocfs2-devel,org.kernel.vger.linux-kernel |
|---|---|
| Message-ID | <[email protected]> |
Hello, syzbot found the following issue on: HEAD commit: e1914add2799 Merge tag 'for-linus' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15d62196580000 kernel config: https://syzkaller.appspot.com/x/.config?x=7f195f6be48c12ec dashboard link: https://syzkaller.appspot.com/bug?extid=3ef989aae096b30f1663 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-e1914add.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/cfc9d48b6e76/vmlinux-e1914add.xz kernel image: https://storage.googleapis.com/syzbot-assets/e7ac48dd4788/bzImage-e1914add.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: [email protected] ------------[ cut here ]------------ memset: detected buffer overflow: 384 byte write of buffer size 16 WARNING: lib/string_helpers.c:1037 at __fortify_report+0x6b/0xa0 lib/string_helpers.c:1036, CPU#0: syz.0.0/5331 Modules linked in: CPU: 0 UID: 0 PID: 5331 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:__fortify_report+0x89/0xa0 lib/string_helpers.c:1036 Code: e8 7c 6b 7e fd 48 8d 3d 45 8f 87 0b 45 84 e4 49 8b 37 48 c7 c0 c0 0e 28 8c 48 c7 c1 e0 0e 28 8c 48 0f 44 c8 4c 89 f2 49 89 d8 <67> 48 0f b9 3a 5b 41 5c 41 5e 41 5f 5d c3 cc cc cc cc cc cc cc cc RSP: 0018:ffffc90003076848 EFLAGS: 00010202 RAX: ffffffff8c280ec0 RBX: 0000000000000010 RCX: ffffffff8c280ee0 RDX: 0000000000000180 RSI: ffffffff8c280d80 RDI: ffffffff903bc0c0 RBP: 000000000000000f R08: 0000000000000010 R09: 1ffffffff2061b5e R10: dffffc0000000000 R11: fffffbfff2061b5f R12: 0000000000000001 R13: 1ffff1100ab75510 R14: 0000000000000180 R15: ffffffff8c280bb8 FS: 0000555562e72540(0000) GS:ffff88808c881000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000001fc6a000 CR4: 0000000000352ef0 Call Trace: <TASK> __fortify_panic+0x9/0x10 lib/string_helpers.c:1043 fortify_memset_chk include/linux/fortify-string.h:495 [inline] ocfs2_remove_refcount_extent fs/ocfs2/refcounttree.c:2134 [inline] ocfs2_decrease_refcount_rec fs/ocfs2/refcounttree.c:2203 [inline] __ocfs2_decrease_refcount+0x1990/0x19e0 fs/ocfs2/refcounttree.c:2249 ocfs2_decrease_refcount+0x59c/0x7d0 fs/ocfs2/refcounttree.c:2312 ocfs2_remove_btree_range+0x125b/0x1610 fs/ocfs2/alloc.c:5800 ocfs2_commit_truncate+0xbb8/0x2310 fs/ocfs2/alloc.c:7383 ocfs2_truncate_for_delete fs/ocfs2/inode.c:701 [inline] ocfs2_wipe_inode fs/ocfs2/inode.c:868 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1157 [inline] ocfs2_evict_inode+0x1023/0x43b0 fs/ocfs2/inode.c:1299 evict+0x61e/0xb10 fs/inode.c:841 ocfs2_dentry_iput+0x24d/0x390 fs/ocfs2/dcache.c:407 __dentry_kill+0x1a2/0x690 fs/dcache.c:718 finish_dput+0xc9/0x480 fs/dcache.c:927 __fput+0x691/0xa60 fs/file_table.c:518 task_work_run+0x1d9/0x270 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:67 [inline] exit_to_user_mode_loop+0xf3/0x4d0 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline] do_syscall_64+0x33e/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f402a59ce59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fffc44472f8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007f402a817da0 RCX: 00007f402a59ce59 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007f402a817da0 R08: 00007f402a816038 R09: 0000000000000000 R10: 0000000000dcaba0 R11: 0000000000000246 R12: 00000000000156b7 R13: 00007f402a81609c R14: 0000000000015685 R15: 00007f402a816090 </TASK> ---------------- Code disassembly (best guess): 0: e8 7c 6b 7e fd call 0xfd7e6b81 5: 48 8d 3d 45 8f 87 0b lea 0xb878f45(%rip),%rdi # 0xb878f51 c: 45 84 e4 test %r12b,%r12b f: 49 8b 37 mov (%r15),%rsi 12: 48 c7 c0 c0 0e 28 8c mov $0xffffffff8c280ec0,%rax 19: 48 c7 c1 e0 0e 28 8c mov $0xffffffff8c280ee0,%rcx 20: 48 0f 44 c8 cmove %rax,%rcx 24: 4c 89 f2 mov %r14,%rdx 27: 49 89 d8 mov %rbx,%r8 * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 5b pop %rbx 30: 41 5c pop %r12 32: 41 5e pop %r14 34: 41 5f pop %r15 36: 5d pop %rbp 37: c3 ret 38: cc int3 39: cc int3 3a: cc int3 3b: cc int3 3c: cc int3 3d: cc int3 3e: cc int3 3f: cc int3 --- 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 [email protected]. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup