diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/events/callchain.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/events/callchain.c b/kernel/events/callchain.c index e9fdb5203de5..411226b26bca 100644 --- a/kernel/events/callchain.c +++ b/kernel/events/callchain.c @@ -227,12 +227,18 @@ get_perf_callchain(struct pt_regs *regs, u32 init_nr, bool kernel, bool user, } if (regs) { + mm_segment_t fs; + if (crosstask) goto exit_put; if (add_mark) perf_callchain_store_context(&ctx, PERF_CONTEXT_USER); + + fs = get_fs(); + set_fs(USER_DS); perf_callchain_user(&ctx, regs); + set_fs(fs); } } |