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Compile error reported by gcc 10.0.1: scsi/qemu-pr-helper.c: In function ‘multipath_pr_out’: scsi/qemu-pr-helper.c:523:32: error: array subscript <unknown> is outside array bounds of ‘struct transportid *[0]’ [-Werror=array-bounds] 523 | paramp.trnptid_list[paramp.num_transportid++] = id; | ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from scsi/qemu-pr-helper.c:36: /usr/include/mpath_persist.h:168:22: note: while referencing ‘trnptid_list’ 168 | struct transportid *trnptid_list[]; | ^~~~~~~~~~~~ scsi/qemu-pr-helper.c:424:35: note: defined here ‘paramp’ 424 | struct prout_param_descriptor paramp; | ^~~~~~ This highlights an actual implementation issue in function multipath_pr_out. The variable paramp is declared with type `struct prout_param_descriptor`, which is a struct terminated by an empty array in mpath_persist.h: struct transportid *trnptid_list[]; That empty array was filled with code that looked like that: trnptid_list[paramp.descr.num_transportid++] = id; This is an actual out-of-bounds access. The fix is to malloc `paramp`. Signed-off-by: Christophe de Dinechin <dinechin@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
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.. | ||
Makefile.objs | ||
pr-helper.h | ||
pr-manager-helper.c | ||
pr-manager-stub.c | ||
pr-manager.c | ||
qemu-pr-helper.c | ||
trace-events | ||
utils.c |