tree 664e5239468f2bc978c6b8c6f2fb64904c20f7e9
parent a01e718f7241c53f564402f7acff373eed5bd166
author Mateusz Guzik <mguzik@redhat.com> 1465161254 +0200
committer Al Viro <viro@zeniv.linux.org.uk> 1465351629 -0400

coredump: fix dumping through pipes

The offset in the core file used to be tracked with ->written field of
the coredump_params structure. The field was retired in favour of
file->f_pos.

However, ->f_pos is not maintained for pipes which leads to breakage.

Restore explicit tracking of the offset in coredump_params. Introduce
->pos field for this purpose since ->written was already reused.

Fixes: a00839395103 ("get rid of coredump_params->written").

Reported-by: Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>
Signed-off-by: Mateusz Guzik <mguzik@redhat.com>
Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>