Messages in this thread Patch in this message | | | Date | Thu, 6 Jul 2023 10:34:10 -0400 | From | Steven Rostedt <> | Subject | [GIT PULL] tracing: Minor fixes for 6.5 |
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Linus,
Tracing fixes for 6.5:
- Fix bad git merge of #endif in arm64 code A merge of the arm64 tree caused #endif to go into the wrong place
- Fix crash on lseek of write access to tracefs/error_log Opening error_log as write only, and then doing an lseek() causes a kernel panic, because the lseek() handle expects a "seq_file" to exist (which is not done on write only opens). Use tracing_lseek() that tests for this instead of calling the default seq lseek handler.
- Check for negative instead of -E2BIG for error on strscpy() returns Instead of testing for -E2BIG from strscpy(), to be more robust, check for less than zero, which will make sure it catches any error that strscpy() may someday return.
Please pull the latest trace-v6.5-2 tree, which can be found at:
git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace.git trace-v6.5-2
Tag SHA1: 8201ec458c9725804267e4eda962cdaf202e85f1 Head SHA1: fddca7db4a4c17f7333793dfb5308d80c76d2896
Arnd Bergmann (1): arm64: ftrace: fix build error with CONFIG_FUNCTION_GRAPH_TRACER=n
Mateusz Stachyra (1): tracing: Fix null pointer dereference in tracing_err_log_open()
Steven Rostedt (Google) (1): tracing/boot: Test strscpy() against less than zero for error
---- arch/arm64/kernel/asm-offsets.c | 2 +- kernel/trace/trace.c | 2 +- kernel/trace/trace_boot.c | 8 ++++---- 3 files changed, 6 insertions(+), 6 deletions(-) --------------------------- diff --git a/arch/arm64/kernel/asm-offsets.c b/arch/arm64/kernel/asm-offsets.c index 757d01a68ffd..5ff1942b04fc 100644 --- a/arch/arm64/kernel/asm-offsets.c +++ b/arch/arm64/kernel/asm-offsets.c @@ -213,9 +213,9 @@ int main(void) DEFINE(FGRET_REGS_X7, offsetof(struct fgraph_ret_regs, regs[7])); DEFINE(FGRET_REGS_FP, offsetof(struct fgraph_ret_regs, fp)); DEFINE(FGRET_REGS_SIZE, sizeof(struct fgraph_ret_regs)); +#endif #ifdef CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS DEFINE(FTRACE_OPS_DIRECT_CALL, offsetof(struct ftrace_ops, direct_call)); -#endif #endif return 0; } diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 64a4dde073ef..3d34e6fea6b2 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -8135,7 +8135,7 @@ static const struct file_operations tracing_err_log_fops = { .open = tracing_err_log_open, .write = tracing_err_log_write, .read = seq_read, - .llseek = seq_lseek, + .llseek = tracing_lseek, .release = tracing_err_log_release, }; diff --git a/kernel/trace/trace_boot.c b/kernel/trace/trace_boot.c index 5fe525f1b8cc..7ccc7a8e155b 100644 --- a/kernel/trace/trace_boot.c +++ b/kernel/trace/trace_boot.c @@ -31,7 +31,7 @@ trace_boot_set_instance_options(struct trace_array *tr, struct xbc_node *node) /* Common ftrace options */ xbc_node_for_each_array_value(node, "options", anode, p) { - if (strscpy(buf, p, ARRAY_SIZE(buf)) == -E2BIG) { + if (strscpy(buf, p, ARRAY_SIZE(buf)) < 0) { pr_err("String is too long: %s\n", p); continue; } @@ -87,7 +87,7 @@ trace_boot_enable_events(struct trace_array *tr, struct xbc_node *node) const char *p; xbc_node_for_each_array_value(node, "events", anode, p) { - if (strscpy(buf, p, ARRAY_SIZE(buf)) == -E2BIG) { + if (strscpy(buf, p, ARRAY_SIZE(buf)) < 0) { pr_err("String is too long: %s\n", p); continue; } @@ -486,7 +486,7 @@ trace_boot_init_one_event(struct trace_array *tr, struct xbc_node *gnode, p = xbc_node_find_value(enode, "filter", NULL); if (p && *p != '\0') { - if (strscpy(buf, p, ARRAY_SIZE(buf)) == -E2BIG) + if (strscpy(buf, p, ARRAY_SIZE(buf)) < 0) pr_err("filter string is too long: %s\n", p); else if (apply_event_filter(file, buf) < 0) pr_err("Failed to apply filter: %s\n", buf); @@ -494,7 +494,7 @@ trace_boot_init_one_event(struct trace_array *tr, struct xbc_node *gnode, if (IS_ENABLED(CONFIG_HIST_TRIGGERS)) { xbc_node_for_each_array_value(enode, "actions", anode, p) { - if (strscpy(buf, p, ARRAY_SIZE(buf)) == -E2BIG) + if (strscpy(buf, p, ARRAY_SIZE(buf)) < 0) pr_err("action string is too long: %s\n", p); else if (trigger_process_regex(file, buf) < 0) pr_err("Failed to apply an action: %s\n", p);
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