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| author | Heiko Carstens <hca@linux.ibm.com> | 2022-02-22 16:53:47 +0300 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2022-03-01 22:41:28 +0300 |
| commit | 1389f17937a03fe4ec71b094e1aa6530a901963e (patch) | |
| tree | 5ab2532ac948879baad3422c400d3c70482cd0c5 /arch/s390/include/asm/extable.h | |
| parent | 9fa881f7e3c74ce6626d166bca9397e5d925937f (diff) | |
| download | linux-1389f17937a03fe4ec71b094e1aa6530a901963e.tar.xz | |
s390/ftrace: fix arch_ftrace_get_regs implementation
arch_ftrace_get_regs is supposed to return a struct pt_regs pointer
only if the pt_regs structure contains all register contents, which
means it must have been populated when created via ftrace_regs_caller.
If it was populated via ftrace_caller the contents are not complete
(the psw mask part is missing), and therefore a NULL pointer needs be
returned.
The current code incorrectly always returns a struct pt_regs pointer.
Fix this by adding another pt_regs flag which indicates if the
contents are complete, and fix arch_ftrace_get_regs accordingly.
Fixes: 894979689d3a ("s390/ftrace: provide separate ftrace_caller/ftrace_regs_caller implementations")
Reported-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reported-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/extable.h')
0 files changed, 0 insertions, 0 deletions