Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [ 01/37] Remove easily user-triggerable BUG from generic_setlease | Date | Tue, 17 Jul 2012 17:02:38 -0700 |
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From: Greg KH <gregkh@linuxfoundation.org>
3.4-stable review patch. If anyone has any objections, please let me know.
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From: Dave Jones <davej@redhat.com>
commit 8d657eb3b43861064d36241e88d9d61c709f33f0 upstream.
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> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- fs/locks.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/locks.c +++ b/fs/locks.c @@ -1465,7 +1465,7 @@ int generic_setlease(struct file *filp, case F_WRLCK: return generic_add_lease(filp, arg, flp); default: - BUG(); + return -EINVAL; } } EXPORT_SYMBOL(generic_setlease);
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