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(KnoxPortal) with ESMTPA id 20220520083716epsmtip24bdb8c10deccb8563372f2c9e2f53548~ww1XlR8I13055130551epsmtip2Q; Fri, 20 May 2022 08:37:16 +0000 (GMT) From: Maninder Singh To: keescook@chromium.org, pmladek@suse.com, bcain@quicinc.com, mpe@ellerman.id.au, benh@kernel.crashing.org, paulus@samba.org, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, satishkh@cisco.com, sebaddel@cisco.com, kartilak@cisco.com, jejb@linux.ibm.com, martin.petersen@oracle.com, mcgrof@kernel.org, jason.wessel@windriver.com, daniel.thompson@linaro.org, dianders@chromium.org, naveen.n.rao@linux.ibm.com, anil.s.keshavamurthy@intel.com, davem@davemloft.net, mhiramat@kernel.org, peterz@infradead.org, mingo@redhat.com, will@kernel.org, longman@redhat.com, boqun.feng@gmail.com, rostedt@goodmis.org, senozhatsky@chromium.org, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, akpm@linux-foundation.org, arnd@arndb.de Cc: linux-hexagon@vger.kernel.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-modules@vger.kernel.org, kgdb-bugreport@lists.sourceforge.net, v.narang@samsung.com, onkarnath.1@samsung.com, Maninder Singh Subject: [PATCH 1/5] kallsyms: pass buffer size in sprint_* APIs Date: Fri, 20 May 2022 14:06:57 +0530 Message-Id: <20220520083701.2610975-2-maninder1.s@samsung.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220520083701.2610975-1-maninder1.s@samsung.com> MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA02TfVBUVRjGOXfvvbuss3UBzSNU1BKSNGFmO3MaHbCGhjuWjSmZ4xS6xB0g Plx3BYx/WGCLYNkGEIRdvkE+WvluQdhF4xsWcQiYVkAoBCpBwgUEDATaD5j873fe93nP8z5n 5nBY9nK2Iyc4/DIjDheG8kku3tB+wO3totMJ/u/cHOSh2jszJMqpriCRIi4TQ7qH93G0kdbF Rg90MhwZ475joQpNLIamNtpI1Dc3zkY5/abG3dJWEv2qWiHQozw1QFNdGgwVDTdgaOSGBPXJ w5CsdoBAzbf0OHosayTRkDaHRNLsVQKlFMazkPyeqTalyiPR+uomge509eCoPf97HJV1b2Jo 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To replace dangerous sprintf API to scnprintf, buffer size is required in arguments. Co-developed-by: Onkarnath Signed-off-by: Onkarnath Signed-off-by: Maninder Singh --- arch/s390/lib/test_unwind.c | 2 +- drivers/scsi/fnic/fnic_trace.c | 8 ++++---- include/linux/kallsyms.h | 20 ++++++++++---------- init/main.c | 2 +- kernel/kallsyms.c | 27 ++++++++++++++++----------- kernel/trace/trace_output.c | 2 +- lib/vsprintf.c | 10 +++++----- 7 files changed, 38 insertions(+), 33 deletions(-) diff --git a/arch/s390/lib/test_unwind.c b/arch/s390/lib/test_unwind.c index 5a053b393d5c..adbc2b53db16 100644 --- a/arch/s390/lib/test_unwind.c +++ b/arch/s390/lib/test_unwind.c @@ -75,7 +75,7 @@ static noinline int test_unwind(struct task_struct *task, struct pt_regs *regs, ret = -EINVAL; break; } - sprint_symbol(sym, addr); + sprint_symbol(sym, KSYM_SYMBOL_LEN, addr); if (bt_pos < BT_BUF_SIZE) { bt_pos += snprintf(bt + bt_pos, BT_BUF_SIZE - bt_pos, state.reliable ? " [%-7s%px] %pSR\n" : diff --git a/drivers/scsi/fnic/fnic_trace.c b/drivers/scsi/fnic/fnic_trace.c index 4a7536bb0ab3..33acaa9bb4ba 100644 --- a/drivers/scsi/fnic/fnic_trace.c +++ b/drivers/scsi/fnic/fnic_trace.c @@ -128,10 +128,10 @@ int fnic_get_trace_data(fnic_dbgfs_t *fnic_dbgfs_prt) } /* Convert function pointer to function name */ if (sizeof(unsigned long) < 8) { - sprint_symbol(str, tbp->fnaddr.low); + sprint_symbol(str, KSYM_SYMBOL_LEN, tbp->fnaddr.low); jiffies_to_timespec64(tbp->timestamp.low, &val); } else { - sprint_symbol(str, tbp->fnaddr.val); + sprint_symbol(str, KSYM_SYMBOL_LEN, tbp->fnaddr.val); jiffies_to_timespec64(tbp->timestamp.val, &val); } /* @@ -170,10 +170,10 @@ int fnic_get_trace_data(fnic_dbgfs_t *fnic_dbgfs_prt) } /* Convert function pointer to function name */ if (sizeof(unsigned long) < 8) { - sprint_symbol(str, tbp->fnaddr.low); + sprint_symbol(str, KSYM_SYMBOL_LEN, tbp->fnaddr.low); jiffies_to_timespec64(tbp->timestamp.low, &val); } else { - sprint_symbol(str, tbp->fnaddr.val); + sprint_symbol(str, KSYM_SYMBOL_LEN, tbp->fnaddr.val); jiffies_to_timespec64(tbp->timestamp.val, &val); } /* diff --git a/include/linux/kallsyms.h b/include/linux/kallsyms.h index 649faac31ddb..598ff08c72d6 100644 --- a/include/linux/kallsyms.h +++ b/include/linux/kallsyms.h @@ -84,11 +84,11 @@ const char *kallsyms_lookup(unsigned long addr, char **modname, char *namebuf); /* Look up a kernel symbol and return it in a text buffer. */ -extern int sprint_symbol(char *buffer, unsigned long address); -extern int sprint_symbol_build_id(char *buffer, unsigned long address); -extern int sprint_symbol_no_offset(char *buffer, unsigned long address); -extern int sprint_backtrace(char *buffer, unsigned long address); -extern int sprint_backtrace_build_id(char *buffer, unsigned long address); +extern int sprint_symbol(char *buffer, size_t size, unsigned long address); +extern int sprint_symbol_build_id(char *buffer, size_t size, unsigned long address); +extern int sprint_symbol_no_offset(char *buffer, size_t size, unsigned long address); +extern int sprint_backtrace(char *buffer, size_t size, unsigned long address); +extern int sprint_backtrace_build_id(char *buffer, size_t size, unsigned long address); int lookup_symbol_name(unsigned long addr, char *symname); int lookup_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name); @@ -118,31 +118,31 @@ static inline const char *kallsyms_lookup(unsigned long addr, return NULL; } -static inline int sprint_symbol(char *buffer, unsigned long addr) +static inline int sprint_symbol(char *buffer, size_t size, unsigned long addr) { *buffer = '\0'; return 0; } -static inline int sprint_symbol_build_id(char *buffer, unsigned long address) +static inline int sprint_symbol_build_id(char *buffer, size_t size, unsigned long address) { *buffer = '\0'; return 0; } -static inline int sprint_symbol_no_offset(char *buffer, unsigned long addr) +static inline int sprint_symbol_no_offset(char *buffer, size_t size, unsigned long addr) { *buffer = '\0'; return 0; } -static inline int sprint_backtrace(char *buffer, unsigned long addr) +static inline int sprint_backtrace(char *buffer, size_t size, unsigned long addr) { *buffer = '\0'; return 0; } -static inline int sprint_backtrace_build_id(char *buffer, unsigned long addr) +static inline int sprint_backtrace_build_id(char *buffer, size_t size, unsigned long addr) { *buffer = '\0'; return 0; diff --git a/init/main.c b/init/main.c index 40255f110885..399a15857bf9 100644 --- a/init/main.c +++ b/init/main.c @@ -1207,7 +1207,7 @@ static bool __init_or_module initcall_blacklisted(initcall_t fn) return false; addr = (unsigned long) dereference_function_descriptor(fn); - sprint_symbol_no_offset(fn_name, addr); + sprint_symbol_no_offset(fn_name, KSYM_SYMBOL_LEN, addr); /* * fn will be "function_name [module_name]" where [module_name] is not diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c index 87e2b1638115..f354378e241f 100644 --- a/kernel/kallsyms.c +++ b/kernel/kallsyms.c @@ -459,7 +459,7 @@ int lookup_symbol_attrs(unsigned long addr, unsigned long *size, } /* Look up a kernel symbol and return it in a text buffer. */ -static int __sprint_symbol(char *buffer, unsigned long address, +static int __sprint_symbol(char *buffer, size_t buf_size, unsigned long address, int symbol_offset, int add_offset, int add_buildid) { char *modname; @@ -502,6 +502,7 @@ static int __sprint_symbol(char *buffer, unsigned long address, /** * sprint_symbol - Look up a kernel symbol and return it in a text buffer * @buffer: buffer to be stored + * @size: size of buffer * @address: address to lookup * * This function looks up a kernel symbol with @address and stores its name, @@ -510,15 +511,16 @@ static int __sprint_symbol(char *buffer, unsigned long address, * * This function returns the number of bytes stored in @buffer. */ -int sprint_symbol(char *buffer, unsigned long address) +int sprint_symbol(char *buffer, size_t size, unsigned long address) { - return __sprint_symbol(buffer, address, 0, 1, 0); + return __sprint_symbol(buffer, size, address, 0, 1, 0); } EXPORT_SYMBOL_GPL(sprint_symbol); /** * sprint_symbol_build_id - Look up a kernel symbol and return it in a text buffer * @buffer: buffer to be stored + * @size: size of buffer * @address: address to lookup * * This function looks up a kernel symbol with @address and stores its name, @@ -527,15 +529,16 @@ EXPORT_SYMBOL_GPL(sprint_symbol); * * This function returns the number of bytes stored in @buffer. */ -int sprint_symbol_build_id(char *buffer, unsigned long address) +int sprint_symbol_build_id(char *buffer, size_t size, unsigned long address) { - return __sprint_symbol(buffer, address, 0, 1, 1); + return __sprint_symbol(buffer, size, address, 0, 1, 1); } EXPORT_SYMBOL_GPL(sprint_symbol_build_id); /** * sprint_symbol_no_offset - Look up a kernel symbol and return it in a text buffer * @buffer: buffer to be stored + * @size: size of buffer * @address: address to lookup * * This function looks up a kernel symbol with @address and stores its name @@ -544,15 +547,16 @@ EXPORT_SYMBOL_GPL(sprint_symbol_build_id); * * This function returns the number of bytes stored in @buffer. */ -int sprint_symbol_no_offset(char *buffer, unsigned long address) +int sprint_symbol_no_offset(char *buffer, size_t size, unsigned long address) { - return __sprint_symbol(buffer, address, 0, 0, 0); + return __sprint_symbol(buffer, size, address, 0, 0, 0); } EXPORT_SYMBOL_GPL(sprint_symbol_no_offset); /** * sprint_backtrace - Look up a backtrace symbol and return it in a text buffer * @buffer: buffer to be stored + * @size: size of buffer * @address: address to lookup * * This function is for stack backtrace and does the same thing as @@ -564,14 +568,15 @@ EXPORT_SYMBOL_GPL(sprint_symbol_no_offset); * * This function returns the number of bytes stored in @buffer. */ -int sprint_backtrace(char *buffer, unsigned long address) +int sprint_backtrace(char *buffer, size_t size, unsigned long address) { - return __sprint_symbol(buffer, address, -1, 1, 0); + return __sprint_symbol(buffer, size, address, -1, 1, 0); } /** * sprint_backtrace_build_id - Look up a backtrace symbol and return it in a text buffer * @buffer: buffer to be stored + * @size: size of buffer * @address: address to lookup * * This function is for stack backtrace and does the same thing as @@ -584,9 +589,9 @@ int sprint_backtrace(char *buffer, unsigned long address) * * This function returns the number of bytes stored in @buffer. */ -int sprint_backtrace_build_id(char *buffer, unsigned long address) +int sprint_backtrace_build_id(char *buffer, size_t size, unsigned long address) { - return __sprint_symbol(buffer, address, -1, 1, 1); + return __sprint_symbol(buffer, size, address, -1, 1, 1); } /* To avoid using get_symbol_offset for every symbol, we carry prefix along. */ diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c index 8aa493d25c73..2a6ec049cab5 100644 --- a/kernel/trace/trace_output.c +++ b/kernel/trace/trace_output.c @@ -362,7 +362,7 @@ trace_seq_print_sym(struct trace_seq *s, unsigned long address, bool offset) const char *name; if (offset) - sprint_symbol(str, address); + sprint_symbol(str, KSYM_SYMBOL_LEN, address); else kallsyms_lookup(address, NULL, NULL, NULL, str); name = kretprobed(str, address); diff --git a/lib/vsprintf.c b/lib/vsprintf.c index f8ff861ef24a..cb241b63c967 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -991,15 +991,15 @@ char *symbol_string(char *buf, char *end, void *ptr, #ifdef CONFIG_KALLSYMS if (*fmt == 'B' && fmt[1] == 'b') - sprint_backtrace_build_id(sym, value); + sprint_backtrace_build_id(sym, KSYM_SYMBOL_LEN, value); else if (*fmt == 'B') - sprint_backtrace(sym, value); + sprint_backtrace(sym, KSYM_SYMBOL_LEN, value); else if (*fmt == 'S' && (fmt[1] == 'b' || (fmt[1] == 'R' && fmt[2] == 'b'))) - sprint_symbol_build_id(sym, value); + sprint_symbol_build_id(sym, KSYM_SYMBOL_LEN, value); else if (*fmt != 's') - sprint_symbol(sym, value); + sprint_symbol(sym, KSYM_SYMBOL_LEN, value); else - sprint_symbol_no_offset(sym, value); + sprint_symbol_no_offset(sym, KSYM_SYMBOL_LEN, value); return string_nocheck(buf, end, sym, spec); #else