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[Bug libc/13729] New: write() to a disk device returns success although kernel function has failed
- From: "redhat at kcs dot de" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sources dot redhat dot com
- Date: Thu, 23 Feb 2012 15:57:05 +0000
- Subject: [Bug libc/13729] New: write() to a disk device returns success although kernel function has failed
- Auto-submitted: auto-generated
http://sourceware.org/bugzilla/show_bug.cgi?id=13729
Bug #: 13729
Summary: write() to a disk device returns success although
kernel function has failed
Product: glibc
Version: 2.11
Status: NEW
Severity: critical
Priority: P2
Component: libc
AssignedTo: unassigned@sourceware.org
ReportedBy: redhat@kcs.de
CC: drepper.fsp@gmail.com
Classification: Unclassified
This code line
if ( write(fd,buf,sectsize*i) != (sectsize*i) ) error(1,errno,"fill_blocks
write failed");
never throws an error, although nothing gets written to the disk.
The Linux kernel knows the problem. It just doesn't get reported through to my
user space program.
Syslog excerpt:
Feb 22 18:55:29 linux-xyf6 kernel: [ 99.981245] sd 1:0:0:0: [sdb] Unhandled
error code
Feb 22 18:55:29 linux-xyf6 kernel: [ 99.981248] sd 1:0:0:0: [sdb] Result:
hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Feb 22 18:55:29 linux-xyf6 kernel: [ 99.981251] sd 1:0:0:0: [sdb] CDB:
Write(10): 2a 00 00 38 8a 30 00 01 00 00
Feb 22 18:55:29 linux-xyf6 kernel: [ 99.981258] end_request: I/O error, dev
sdb, sector 3705392
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