Messages in this thread | | | Date | Wed, 23 Nov 2005 18:22:13 +0530 | From | Maneesh Soni <> | Subject | [OOPS] sysfs_hash_and_remove (was Re: What protection ....) |
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On Wed, Nov 23, 2005 at 09:18:45AM +0100, Ingo Molnar wrote: > [..] > on a related note - i've been carrying the patch below in -rt for 2 > months (i.e. Steven's kernel has it too), as a workaround against the > crash described below. > [..]
> i'm occasionally getting the crash below on a PREEMPT_RT kernel. Might > be a PREEMPT_RT bug, or might be some sysfs race only visible under > PREEMPT_RT. Any ideas? The crash is at: > > (gdb) list *0xc01a2095 > 0xc01a2095 is in sysfs_hash_and_remove (fs/sysfs/inode.c:229). > 224 } > 225 > 226 void sysfs_hash_and_remove(struct dentry * dir, const char * name) > 227 { > 228 struct sysfs_dirent * sd; > 229 struct sysfs_dirent * parent_sd = dir->d_fsdata; > 230 > 231 if (dir->d_inode == NULL) > 232 /* no inode means this hasn't been made visible yet */ > 233 return; > (gdb) > Looks like here it is crashing due to bogus dentry pointer in the kobject kobj->dentry. Could be some stale pointer?
Just got the mbox.. will go thru it more closely..
-- Maneesh Soni Linux Technology Center, IBM India Software Labs, Bangalore, India email: maneesh@in.ibm.com Phone: 91-80-25044990 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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