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H A D | file.c | 88413a6b Tue May 05 05:12:50 CDT 2020 Jeremy Kerr <jk@ozlabs.org> powerpc/spufs: fix copy_to_user while atomic
Currently, we may perform a copy_to_user (through simple_read_from_buffer()) while holding a context's register_lock, while accessing the context save area.
This change uses a temporary buffer for the context save area data, which we then pass to simple_read_from_buffer.
Includes changes from Christoph Hellwig <hch@lst.de>.
Fixes: bf1ab978be23 ("[POWERPC] coredump: Add SPU elf notes to coredump.") Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Reviewed-by: Arnd Bergmann <arnd@arndb.de> [hch: renamed to function to avoid ___-prefixes] Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> 88413a6b Tue May 05 05:12:50 CDT 2020 Jeremy Kerr <jk@ozlabs.org> powerpc/spufs: fix copy_to_user while atomic Currently, we may perform a copy_to_user (through simple_read_from_buffer()) while holding a context's register_lock, while accessing the context save area. This change uses a temporary buffer for the context save area data, which we then pass to simple_read_from_buffer. Includes changes from Christoph Hellwig <hch@lst.de>. Fixes: bf1ab978be23 ("[POWERPC] coredump: Add SPU elf notes to coredump.") Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Reviewed-by: Arnd Bergmann <arnd@arndb.de> [hch: renamed to function to avoid ___-prefixes] Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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