I know nothing about powerpc ISA/arch, but it seems the crash point is
NIP [c00000000025adbc] .blkdev_get+0x16c/0x2c0
Since there is no ddebs built for powerpc, I built myself using same natty
toolchain, this is what gdb points at blkdev_get+0x16c:
(gdb) l *(blkdev_get+0x16c)
0xc00000000025adbc is in blkdev_get
(/home/herton/ubuntu-natty/fs/block_dev.c:1270).
1265 * write holder makes the write_holder state stick until
1266 * all are released. This is good enough and tracking
1267 * individual writeable reference is too fragile given
the
1268 * way @mode is used in blkdev_get/put().
1269 */
1270 if ((disk->flags & GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE)
&&
1271 !res && (mode & FMODE_WRITE) &&
!bdev->bd_write_holder) {
1272 bdev->bd_write_holder = true;
1273 disk_block_events(disk);
1274 }
Which means likely this bug will be fixed by cherry-picking commit
4c49ff3 upstream on natty.
I'll build a test kernel on Monday with the fix and ask you try it.
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Herton R. Krzesinski (herton)
** Changed in: linux (Ubuntu)
Status: Confirmed => In Progress
** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
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Title:
Kernel oops when mounting UDF volume
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