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Remove easily user-triggerable BUG from generic_setlease 

This can be trivially triggered from userspace by passing in something unexpected.

    kernel BUG at fs/locks.c:1468!
    invalid opcode: 0000 [#1] SMP
    RIP: 0010:generic_setlease+0xc2/0x100
    Call Trace:
      __vfs_setlease+0x35/0x40
      fcntl_setlease+0x76/0x150
      sys_fcntl+0x1c6/0x810
      system_call_fastpath+0x1a/0x1f

Signed-off-by: Dave Jones <davej@redhat.com>
Cc: stable@kernel.org # 3.2+
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Dave Jones 2012-07-13 13:35:36 -04:00 committed by Linus Torvalds
parent 39ea32ca7e
commit 8d657eb3b4
1 changed files with 1 additions and 1 deletions
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2
fs/locks.c
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@ -1465,7 +1465,7 @@ int generic_setlease(struct file *filp, long arg, struct file_lock **flp)
case F_WRLCK: case F_WRLCK:
return generic_add_lease(filp, arg, flp); return generic_add_lease(filp, arg, flp);
default: default:
BUG(); return -EINVAL;
} }
} }
EXPORT_SYMBOL(generic_setlease); EXPORT_SYMBOL(generic_setlease);