linux-kernel - Can someone confirm ext4 BUG

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Sun, 19 Jun 2011 10:13:52 +0000
From:	halfdog <me@...fdog.net>
To:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Can someone confirm ext4 BUG_ON on latest kernel build?

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Sorry, I do not have latest kernel. Can someone confirm this on latest?
At least bugtracker does not know about it, and to my understanding of
source, should be still here.

dd if=/dev/zero bs=1M count=64 of=test
mkfs.ext4 -F test
echo -n " " | dd of=test bs=1 count=1 seek=297195 conv=notrunc
mount -o loop test /mnt/test
dmesg -c

On ubuntu natty with latest kernel, it seems, that
fs/ext4/super.c:__save_error_info calls mod_timer before timer->function
is set at end of fs/ext4/super.c:ext4_fill_super via
  sbi->s_err_report.function = print_daily_error_info;

This causes BUG_ON(!timer->function) in kernel/timer.c:__mod_timer
Device is stuck, not usable any more.

Thanks

- -- 
http://www.halfdog.net/
PGP: 156A AE98 B91F 0114 FE88  2BD8 C459 9386 feed a bee
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (GNU/Linux)

iD8DBQFN/cvFxFmThv7tq+4RAgfvAJ97N9bnKq4kN99XneTMyJZ5Hha9MQCfcguN
L4trkTeOsIqDWF8m6VUqcgc=
=zvYY
-----END PGP SIGNATURE-----
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/