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| author | Arnd Bergmann <arnd@arndb.de> | 2020-02-01 22:20:52 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-02-02 11:54:41 +0100 |
| commit | 11648b8339f840d4b1f4c54a1abec8025d9e077d (patch) | |
| tree | 2937368670d0100cab97eff7656bb9ca4e439149 /arch/sparc/kernel/sys_sparc_64.c | |
| parent | 94f2630b18975bb56eee5d1a36371db967643479 (diff) | |
| download | lwn-11648b8339f840d4b1f4c54a1abec8025d9e077d.tar.gz lwn-11648b8339f840d4b1f4c54a1abec8025d9e077d.zip | |
sparc64: fix adjtimex regression
Anatoly Pugachev reported one of the y2038 patches to introduce
a fatal bug from a stupid typo:
[ 96.384129] watchdog: BUG: soft lockup - CPU#8 stuck for 22s!
...
[ 96.385624] [0000000000652ca4] handle_mm_fault+0x84/0x320
[ 96.385668] [0000000000b6f2bc] do_sparc64_fault+0x43c/0x820
[ 96.385720] [0000000000407754] sparc64_realfault_common+0x10/0x20
[ 96.385769] [000000000042fa28] __do_sys_sparc_clock_adjtime+0x28/0x80
[ 96.385819] [00000000004307f0] sys_sparc_clock_adjtime+0x10/0x20
[ 96.385866] [0000000000406294] linux_sparc_syscall+0x34/0x44
Fix the code to dereference the correct pointer again.
Reported-by: Anatoly Pugachev <matorola@gmail.com>
Tested-by: Anatoly Pugachev <matorola@gmail.com>
Fixes: 251ec1c159e4 ("y2038: sparc: remove use of struct timex")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/kernel/sys_sparc_64.c')
| -rw-r--r-- | arch/sparc/kernel/sys_sparc_64.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/sparc/kernel/sys_sparc_64.c b/arch/sparc/kernel/sys_sparc_64.c index 34917617f258..6b92fadb6ec7 100644 --- a/arch/sparc/kernel/sys_sparc_64.c +++ b/arch/sparc/kernel/sys_sparc_64.c @@ -551,7 +551,7 @@ out_unlock: SYSCALL_DEFINE1(sparc_adjtimex, struct __kernel_timex __user *, txc_p) { struct __kernel_timex txc; - struct __kernel_old_timeval *tv = (void *)&txc_p->time; + struct __kernel_old_timeval *tv = (void *)&txc.time; int ret; /* Copy the user data space into the kernel copy @@ -576,7 +576,7 @@ SYSCALL_DEFINE2(sparc_clock_adjtime, const clockid_t, which_clock, struct __kernel_timex __user *, txc_p) { struct __kernel_timex txc; - struct __kernel_old_timeval *tv = (void *)&txc_p->time; + struct __kernel_old_timeval *tv = (void *)&txc.time; int ret; if (!IS_ENABLED(CONFIG_POSIX_TIMERS)) { |