From: Mark Rutland mark.rutland@arm.com
stable inclusion from stable-v5.10.199 commit 004bdab6edc70aa5bd0e61573bacaee7857c5790 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I65RG3?from=project-issue CVE: NA
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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commit 18906ff9af6517c20763ed63dab602a4150794f7 upstream.
Recently, we reworked a lot of code to consistentlt pass ESR_ELx as a 64-bit quantity. However, we missed that this can be passed into die() and __die() as the 'err' parameter where it is truncated to a 32-bit int.
As notify_die() already takes 'err' as a long, this patch changes die() and __die() to also take 'err' as a long, ensuring that the full value of ESR_ELx is retained.
At the same time, die() is updated to consistently log 'err' as a zero-padded 64-bit quantity.
Subsequent patches will pass the ESR_ELx value to die() for a number of exceptions.
Signed-off-by: Mark Rutland mark.rutland@arm.com Reviewed-by: Mark Brown broonie@kernel.org Reviewed-by: Anshuman Khandual anshuman.khandual@arm.com Cc: Alexandru Elisei alexandru.elisei@arm.com Cc: Amit Daniel Kachhap amit.kachhap@arm.com Cc: James Morse james.morse@arm.com Cc: Will Deacon will@kernel.org Link: https://lore.kernel.org/r/20220913101732.3925290-3-mark.rutland@arm.com Signed-off-by: Catalin Marinas catalin.marinas@arm.com Signed-off-by: Jinjie Ruan ruanjinjie@huawei.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Jinjie Ruan ruanjinjie@huawei.com --- arch/arm64/include/asm/system_misc.h | 2 +- arch/arm64/kernel/traps.c | 6 +++--- 2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/arch/arm64/include/asm/system_misc.h b/arch/arm64/include/asm/system_misc.h index 1ab63cfbbaf1..624a608933f1 100644 --- a/arch/arm64/include/asm/system_misc.h +++ b/arch/arm64/include/asm/system_misc.h @@ -18,7 +18,7 @@
struct pt_regs;
-void die(const char *msg, struct pt_regs *regs, int err); +void die(const char *msg, struct pt_regs *regs, long err);
struct siginfo; void arm64_notify_die(const char *str, struct pt_regs *regs, diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c index f8ec533eb590..110f6b11722c 100644 --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -91,12 +91,12 @@ static void dump_kernel_instr(const char *lvl, struct pt_regs *regs)
#define S_SMP " SMP"
-static int __die(const char *str, int err, struct pt_regs *regs) +static int __die(const char *str, long err, struct pt_regs *regs) { static int die_counter; int ret;
- pr_emerg("Internal error: %s: %x [#%d]" S_PREEMPT S_SMP "\n", + pr_emerg("Internal error: %s: %016lx [#%d]" S_PREEMPT S_SMP "\n", str, err, ++die_counter);
/* trap and error numbers are mostly meaningless on ARM */ @@ -117,7 +117,7 @@ static DEFINE_RAW_SPINLOCK(die_lock); /* * This function is protected against re-entrancy. */ -void die(const char *str, struct pt_regs *regs, int err) +void die(const char *str, struct pt_regs *regs, long err) { int ret; unsigned long flags;