Dan Carpenter af7aa4fe94 proc/vmcore: fix signedness bug in read_from_oldmem() ... commit 641db40f3a upstream. The bug is the error handling: if (tmp < nr_bytes) { "tmp" can hold negative error codes but because "nr_bytes" is type size_t the negative error codes are treated as very high positive values (success). Fix this by changing "nr_bytes" to type ssize_t. The "nr_bytes" variable is used to store values between 1 and PAGE_SIZE and they can fit in ssize_t without any issue. Link: https://lkml.kernel.org/r/b55f7eed-1c65-4adc-95d1-6c7c65a54a6e@moroto.mountain Fixes: 5d8de293c2 ("vmcore: convert copy_oldmem_page() to take an iov_iter") Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org> Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org> Acked-by: Baoquan He <bhe@redhat.com> Cc: Dave Young <dyoung@redhat.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-08-03 10:24:14 +02:00
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Kconfig	…
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bootconfig.c	…
cmdline.c	…
consoles.c	…
cpuinfo.c	…
devices.c	…
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internal.h	…
interrupts.c	…
kcore.c	…
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loadavg.c	…
meminfo.c	proc/meminfo: fix spacing in SecPageTables	2022-11-22 18:50:44 -08:00
namespaces.c	…
nommu.c	…
page.c	…
proc_net.c	…
proc_sysctl.c	sysctl: clarify register_sysctl_init() base directory order	2023-05-17 11:53:46 +02:00
proc_tty.c	…
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softirqs.c	…
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task_mmu.c	mm: hugetlb: proc: check for hugetlb shared PMD in /proc/PID/smaps	2023-02-09 11:28:20 +01:00
task_nommu.c	…
thread_self.c	…
uptime.c	…
util.c	…
version.c	…
vmcore.c	proc/vmcore: fix signedness bug in read_from_oldmem()	2023-08-03 10:24:14 +02:00