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author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-06-11 17:05:03 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-06-11 17:05:03 -0700 |
commit | ad347abe4a9876b1f65f408ab467137e88f77eb4 (patch) | |
tree | 5891de2e0bf564bd35b458eac31026cc7e7285ed | |
parent | 548843c096d08b6c24d2aa1b73783da37c96bb0a (diff) | |
parent | 3e08a9f9760f4a70d633c328a76408e62d6f80a3 (diff) | |
download | lwn-ad347abe4a9876b1f65f408ab467137e88f77eb4.tar.gz lwn-ad347abe4a9876b1f65f408ab467137e88f77eb4.zip |
Merge tag 'trace-v5.13-rc5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fixes from Steven Rostedt:
- Fix the length check in the temp buffer filter
- Fix build failure in bootconfig tools for "fallthrough" macro
- Fix error return of bootconfig apply_xbc() routine
* tag 'trace-v5.13-rc5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
tracing: Correct the length check which causes memory corruption
ftrace: Do not blindly read the ip address in ftrace_bug()
tools/bootconfig: Fix a build error accroding to undefined fallthrough
tools/bootconfig: Fix error return code in apply_xbc()
-rw-r--r-- | kernel/trace/ftrace.c | 8 | ||||
-rw-r--r-- | kernel/trace/trace.c | 2 | ||||
-rw-r--r-- | tools/bootconfig/include/linux/bootconfig.h | 4 | ||||
-rw-r--r-- | tools/bootconfig/main.c | 1 |
4 files changed, 13 insertions, 2 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 2e8a3fde7104..72ef4dccbcc4 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -1967,12 +1967,18 @@ static int ftrace_hash_ipmodify_update(struct ftrace_ops *ops, static void print_ip_ins(const char *fmt, const unsigned char *p) { + char ins[MCOUNT_INSN_SIZE]; int i; + if (copy_from_kernel_nofault(ins, p, MCOUNT_INSN_SIZE)) { + printk(KERN_CONT "%s[FAULT] %px\n", fmt, p); + return; + } + printk(KERN_CONT "%s", fmt); for (i = 0; i < MCOUNT_INSN_SIZE; i++) - printk(KERN_CONT "%s%02x", i ? ":" : "", p[i]); + printk(KERN_CONT "%s%02x", i ? ":" : "", ins[i]); } enum ftrace_bug_type ftrace_bug_type; diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index a21ef9cd2aae..9299057feb56 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -2736,7 +2736,7 @@ trace_event_buffer_lock_reserve(struct trace_buffer **current_rb, (entry = this_cpu_read(trace_buffered_event))) { /* Try to use the per cpu buffer first */ val = this_cpu_inc_return(trace_buffered_event_cnt); - if ((len < (PAGE_SIZE - sizeof(*entry))) && val == 1) { + if ((len < (PAGE_SIZE - sizeof(*entry) - sizeof(entry->array[0]))) && val == 1) { trace_event_setup(entry, type, trace_ctx); entry->array[0] = len; return entry; diff --git a/tools/bootconfig/include/linux/bootconfig.h b/tools/bootconfig/include/linux/bootconfig.h index 078cbd2ba651..de7f30f99af3 100644 --- a/tools/bootconfig/include/linux/bootconfig.h +++ b/tools/bootconfig/include/linux/bootconfig.h @@ -4,4 +4,8 @@ #include "../../../../include/linux/bootconfig.h" +#ifndef fallthrough +# define fallthrough +#endif + #endif diff --git a/tools/bootconfig/main.c b/tools/bootconfig/main.c index 7362bef1a368..6cd6080cac04 100644 --- a/tools/bootconfig/main.c +++ b/tools/bootconfig/main.c @@ -399,6 +399,7 @@ static int apply_xbc(const char *path, const char *xbc_path) } /* TODO: Ensure the @path is initramfs/initrd image */ if (fstat(fd, &stat) < 0) { + ret = -errno; pr_err("Failed to get the size of %s\n", path); goto out; } |