Hello,
syzbot found the following crash on:
HEAD commit: 01364dad Linux 4.14.174
git tree: linux-4.14.y
console output:
https://syzkaller.appspot.com/x/log.txt?x=122b4f55e00000
kernel config:
https://syzkaller.appspot.com/x/.config?x=664dd71881ab2b2d
dashboard link:
https://syzkaller.appspot.com/bug?extid=e119c3cedf831cd93c5b
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by:
syzbot+e119c3...@syzkaller.appspotmail.com
MINIX-fs: mounting unchecked file system, running fsck is recommended
MINIX-fs: mounting unchecked file system, running fsck is recommended
------------[ cut here ]------------
WARNING: CPU: 1 PID: 26577 at fs/inode.c:341 inc_nlink+0x113/0x130 fs/inode.c:341
netlink: 32 bytes leftover after parsing attributes in process `syz-executor.1'.
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 26577 Comm: syz-executor.5 Not tainted 4.14.174-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x13e/0x194 lib/dump_stack.c:58
panic+0x1f9/0x42d kernel/panic.c:183
__warn.cold+0x2f/0x30 kernel/panic.c:547
report_bug+0x20a/0x248 lib/bug.c:186
fixup_bug arch/x86/kernel/traps.c:177 [inline]
fixup_bug arch/x86/kernel/traps.c:172 [inline]
do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:963
RIP: 0010:inc_nlink+0x113/0x130 fs/inode.c:341
RSP: 0018:ffff8881d9b0fdb0 EFLAGS: 00010212
RAX: 0000000000040000 RBX: ffff888099af2180 RCX: ffffc90005e24000
RDX: 0000000000000974 RSI: ffffffff8190edd3 RDI: ffff888099af2258
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000002
R10: ffffed103b361f8e R11: 0000000000000003 R12: ffff888099af21c8
R13: ffff888096649e40 R14: ffff888096649e98 R15: 0000000000000000
inode_inc_link_count include/linux/fs.h:2034 [inline]
minix_mkdir+0x5a/0x160 fs/minix/namei.c:121
vfs_mkdir+0x3af/0x620 fs/namei.c:3849
SYSC_mkdirat fs/namei.c:3872 [inline]
SyS_mkdirat fs/namei.c:3856 [inline]
SYSC_mkdir fs/namei.c:3883 [inline]
SyS_mkdir+0x1bc/0x210 fs/namei.c:3881
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45c849
RSP: 002b:00007fab61c78c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007fab61c796d4 RCX: 000000000045c849
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 0000000020000400
RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000000000000072c R14: 00000000004c230d R15: 000000000076bf0c
Kernel Offset: disabled
Rebooting in 86400 seconds..
---
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