lkml.org 
[lkml]   [2018]   [Feb]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: ext4 iomap SEEK broken [was: [GIT PULL] ext4 updates for 4.15]
From
Date
On 02/12/2018, 11:02 AM, Jiri Slaby wrote:
> Given this happens only on 32bit kernel, I assume some 32bit overflow.
> But I am unable to see it (yet).

Just to add, a diff of strace in good and bad kernels:
@@ -655,14 +655,4 @@
_llseek(3, 4275568640, [4286054400], SEEK_DATA) = 0
_llseek(3, 4286054400, [4288675840], SEEK_HOLE) = 0
_llseek(3, 4288675840, [4299161600], SEEK_DATA) = 0
-_llseek(3, 4299161600, [4301783040], SEEK_HOLE) = 0
+_llseek(3, 4299161600, [4299161600], SEEK_HOLE) = 2621440

llseek returns a very invalid value when it comes to 0x100400000.

regards,
--
js
suse labs

\
 
 \ /
  Last update: 2018-02-12 13:14    [W:0.111 / U:2.176 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site