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Red Hat Bugzilla – Attachment 939006 Details for
Bug 1144128
FUSE: Scheduling while atomic OOPSes when using inval_entry
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The patch to avoid scheduling while atomic in fuse.ko
fuse-avoid-schedule-while-atomic-2.6.32.patch (text/plain), 813 bytes, created by
Richard Sharpe
on 2014-09-18 18:14:49 UTC
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Description:
The patch to avoid scheduling while atomic in fuse.ko
Filename:
MIME Type:
Creator:
Richard Sharpe
Created:
2014-09-18 18:14:49 UTC
Size:
813 bytes
patch
obsolete
>--- fs/fuse/dev.c.orig 2014-06-25 12:26:58.523227249 -0400 >+++ fs/fuse/dev.c 2014-06-25 12:36:11.018226931 -0400 >@@ -618,6 +618,20 @@ > return lock_request(cs->fc, cs->req); > } > >+static void fuse_copy_unmap(struct fuse_copy_state *cs) >+{ >+ cs->buf = (void *)(cs->buf - cs->mapaddr); >+ kunmap_atomic(cs->mapaddr, KM_USER0); >+} >+ >+static void fuse_copy_remap(struct fuse_copy_state *cs) >+{ >+ cs->mapaddr = kmap_atomic(cs->pg, KM_USER0); >+ >+ cs->buf = (unsigned long)cs->buf + cs->mapaddr; >+} >+ >+ > /* Do as much copy to/from userspace buffer as we can */ > static int fuse_copy_do(struct fuse_copy_state *cs, void **val, unsigned *size) > { >@@ -936,7 +950,9 @@ > char *buf; > struct qstr name; > >+ fuse_copy_unmap(cs); > buf = kzalloc(FUSE_NAME_MAX + 1, GFP_KERNEL); >+ fuse_copy_remap(cs); > if (!buf) > goto err; >
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