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e0d75267f59d7084e0468bd68beeb1bf9c71d7c0
linux/kernel/trace
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Shang XiaoJing e0d75267f5 tracing: kprobe: Fix potential null-ptr-deref on trace_event_file in kprobe_event_gen_test_exit() 
When trace_get_event_file() failed, gen_kretprobe_test will be assigned
as the error code. If module kprobe_event_gen_test is removed now, the
null pointer dereference will happen in kprobe_event_gen_test_exit().
Check if gen_kprobe_test or gen_kretprobe_test is error code or NULL
before dereference them.

BUG: kernel NULL pointer dereference, address: 0000000000000012
PGD 0 P4D 0
Oops: 0000 [#1] SMP PTI
CPU: 3 PID: 2210 Comm: modprobe Not tainted
6.1.0-rc1-00171-g2159299a3b74-dirty #217
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014
RIP: 0010:kprobe_event_gen_test_exit+0x1c/0xb5 [kprobe_event_gen_test]
Code: Unable to access opcode bytes at 0xffffffff9ffffff2.
RSP: 0018:ffffc900015bfeb8 EFLAGS: 00010246
RAX: ffffffffffffffea RBX: ffffffffa0002080 RCX: 0000000000000000
RDX: ffffffffa0001054 RSI: ffffffffa0001064 RDI: ffffffffdfc6349c
RBP: ffffffffa0000000 R08: 0000000000000004 R09: 00000000001e95c0
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000800
R13: ffffffffa0002420 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f56b75be540(0000) GS:ffff88813bc00000(0000)
knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff9ffffff2 CR3: 000000010874a006 CR4: 0000000000330ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __x64_sys_delete_module+0x206/0x380
 ? lockdep_hardirqs_on_prepare+0xd8/0x190
 ? syscall_enter_from_user_mode+0x1c/0x50
 do_syscall_64+0x3f/0x90
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Link: https://lore.kernel.org/all/20221108015130.28326-2-shangxiaojing@huawei.com/

Fixes: 64836248dd ("tracing: Add kprobe event command generation test module")
Signed-off-by: Shang XiaoJing <shangxiaojing@huawei.com>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
2022-11-18 10:15:33 +09:00
..
rv
rv/monitor: Add __init/__exit annotations to module init/exit funcs
2022-09-26 18:10:51 -04:00
blktrace.c
blktrace: remove unnessary stop block trace in 'blk_trace_shutdown'
2022-10-20 06:02:52 -07:00
bpf_trace.c
bpf: Fix sample_flags for bpf_perf_event_output
2022-10-17 16:32:06 +02:00
bpf_trace.h
…
error_report-traces.c
…
fgraph.c
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
2022-06-03 14:05:34 -07:00
fprobe.c
tracing/fprobe: Fix to check whether fprobe is registered correctly
2022-11-04 08:50:07 +09:00
ftrace_internal.h
…
ftrace.c
ftrace: Fix use-after-free for dynamic ftrace_ops
2022-11-02 23:53:22 -04:00
Kconfig
ftrace: Add HAVE_DYNAMIC_FTRACE_NO_PATCHABLE
2022-09-16 22:16:48 +02:00
kprobe_event_gen_test.c
tracing: kprobe: Fix potential null-ptr-deref on trace_event_file in kprobe_event_gen_test_exit()
2022-11-18 10:15:33 +09:00
Makefile
rv: Add Runtime Verification (RV) interface
2022-07-30 14:01:28 -04:00
pid_list.c
tracing: Cleanup double word in comment
2022-04-26 17:58:50 -04:00
pid_list.h
tracing: Create a sparse bitmask for pid filtering
2021-10-05 17:38:45 -04:00
power-traces.c
…
preemptirq_delay_test.c
…
rethook.c
rethook: Reject getting a rethook if RCU is not watching
2022-06-17 21:53:35 +02:00
ring_buffer_benchmark.c
…
ring_buffer.c
ring-buffer: Include dropped pages in counting dirty patches
2022-11-16 18:08:29 -05:00
rpm-traces.c
…
synth_event_gen_test.c
…
trace_benchmark.c
tracing: Add numeric delta time to the trace event benchmark
2022-09-26 13:01:09 -04:00
trace_benchmark.h
tracing: Add numeric delta time to the trace event benchmark
2022-09-26 13:01:09 -04:00
trace_boot.c
tracing: Initialize integer variable to prevent garbage return value
2022-05-26 21:13:00 -04:00
trace_branch.c
…
trace_clock.c
…
trace_dynevent.c
tracing: Auto generate event name when creating a group of events
2022-07-24 19:11:17 -04:00
trace_dynevent.h
tracing: Add DYNAMIC flag for dynamic events
2021-08-18 18:10:32 -04:00
trace_entries.h
…
trace_eprobe.c
tracing: Move duplicate code of trace_kprobe/eprobe.c into header
2022-10-12 13:50:00 -04:00
trace_event_perf.c
tracing/perf: Fix double put of trace event when init fails
2022-08-21 15:56:07 -04:00
trace_events_filter_test.h
…
trace_events_filter.c
tracing/filter: Call filter predicate functions directly via a switch statement
2022-09-26 13:01:10 -04:00
trace_events_hist.c
tracing/hist: Call hist functions directly via a switch statement
2022-09-26 13:01:10 -04:00
trace_events_inject.c
tracing: Support __rel_loc relative dynamic data location attribute
2021-12-06 15:37:21 -05:00
trace_events_synth.c
tracing: Fix reading strings from synthetic events
2022-10-12 13:51:16 -04:00
trace_events_trigger.c
tracing: Fix to check event_mutex is held while accessing trigger list
2022-09-06 22:26:00 -04:00
trace_events_user.c
tracing/user_events: Move pages/locks into groups to prepare for namespaces
2022-10-03 13:28:46 -04:00
trace_events.c
tracing: Have filter accept "common_cpu" to be consistent
2022-08-21 15:56:08 -04:00
trace_export.c
…
trace_functions_graph.c
tracing: in_irq() cleanup
2021-10-13 18:19:41 -04:00
trace_functions.c
ftrace: disable preemption when recursion locked
2021-10-27 11:21:49 -04:00
trace_hwlat.c
trace/hwlat: make use of the helper function kthread_run_on_cpu()
2022-01-15 16:30:24 +02:00
trace_irqsoff.c
…
trace_kdb.c
…
trace_kprobe_selftest.c
…
trace_kprobe_selftest.h
…
trace_kprobe.c
tracing: Move duplicate code of trace_kprobe/eprobe.c into header
2022-10-12 13:50:00 -04:00
trace_mmiotrace.c
…
trace_nop.c
…
trace_osnoise.c
tracing/osnoise: Fix possible recursive locking in stop_per_cpu_kthreads
2022-09-26 16:05:18 -04:00
trace_output.c
tracing: Remove usage of list iterator after the loop body
2022-04-27 17:19:30 -04:00
trace_output.h
…
trace_preemptirq.c
tracing: hold caller_addr to hardirq_{enable,disable}_ip
2022-09-06 22:26:00 -04:00
trace_printk.c
tracing: Disable "other" permission bits in the tracefs files
2021-10-08 18:08:43 -04:00
trace_probe_kernel.h
tracing: Add "(fault)" name injection to kernel probes
2022-10-12 13:50:20 -04:00
trace_probe_tmpl.h
tracing/probes: Have process_fetch_insn() take a void * instead of pt_regs
2021-08-19 09:09:03 -04:00
trace_probe.c
tracing/probes: Have kprobes and uprobes use $COMM too
2022-08-21 15:56:08 -04:00
trace_probe.h
tracing/eprobe: Add eprobe filter support
2022-09-26 13:01:08 -04:00
trace_recursion_record.c
tracing: Use trace_create_file() to simplify creation of tracefs entries
2022-05-26 21:12:52 -04:00
trace_sched_switch.c
sched/tracing: Append prev_state to tp args instead
2022-05-12 00:37:11 +02:00
trace_sched_wakeup.c
sched/tracing: Append prev_state to tp args instead
2022-05-12 00:37:11 +02:00
trace_selftest_dynamic.c
…
trace_selftest.c
tracing: Reset the function filter after completing trampoline/graph selftest
2022-05-25 16:57:37 -04:00
trace_seq.c
…
trace_stack.c
tracing: Disable "other" permission bits in the tracefs files
2021-10-08 18:08:43 -04:00
trace_stat.c
tracing: Disable "other" permission bits in the tracefs files
2021-10-08 18:08:43 -04:00
trace_stat.h
…
trace_synth.h
tracing: synth events: increase max fields count
2021-09-08 15:29:16 -04:00
trace_syscalls.c
tracing: Make tp_printk work on syscall tracepoints
2022-04-26 17:58:52 -04:00
trace_uprobe.c
Merge tag 'trace-v6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
2022-08-05 09:41:12 -07:00
trace.c
tracing/ring-buffer: Have polling block on watermark
2022-11-16 17:13:04 -05:00
trace.h
tracing: Move struct filter_pred into trace_events_filter.c
2022-09-26 13:01:10 -04:00
tracing_map.c
tracing: Remove unused variable 'dups'
2022-10-03 12:20:31 -04:00
tracing_map.h
…