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Sun, 02 Aug 2026 06:27:52 -0700 (PDT) Date: Sun, 02 Aug 2026 06:27:52 -0700 In-Reply-To: <6a6ebd9e.2d659fcc.1d46f5.01cc.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a6f45d8.13bfb6d0.1ecdd5.026e.GAE@google.com> Subject: Forwarded: [PATCH] Fix invalid-free in f_uac1_opts_c_srate_store From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: [PATCH] Fix invalid-free in f_uac1_opts_c_srate_store Author: subasris1210@gmail.com #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-linus Signed-off-by: Subasri S --- drivers/usb/gadget/function/f_uac1.c | 4 +++- drivers/usb/gadget/function/f_uac2.c | 4 +++- 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/usb/gadget/function/f_uac1.c b/drivers/usb/gadget/function/f_uac1.c index 85c502e98f57..488c59fdb2bf 100644 --- a/drivers/usb/gadget/function/f_uac1.c +++ b/drivers/usb/gadget/function/f_uac1.c @@ -1595,6 +1595,7 @@ static ssize_t f_uac1_opts_##name##_store(struct config_item *item, \ { \ struct f_uac1_opts *opts = to_f_uac1_opts(item); \ char *split_page = NULL; \ + char *original_split_page = NULL; \ int ret = -EINVAL; \ char *token; \ u32 num; \ @@ -1609,6 +1610,7 @@ static ssize_t f_uac1_opts_##name##_store(struct config_item *item, \ i = 0; \ memset(opts->name##s, 0x00, sizeof(opts->name##s)); \ split_page = kstrdup(page, GFP_KERNEL); \ + original_split_page = split_page; \ while ((token = strsep(&split_page, ",")) != NULL) { \ ret = kstrtou32(token, 0, &num); \ if (ret) \ @@ -1619,7 +1621,7 @@ static ssize_t f_uac1_opts_##name##_store(struct config_item *item, \ }; \ \ end: \ - kfree(split_page); \ + kfree(original_split_page); \ mutex_unlock(&opts->lock); \ return ret; \ } \ diff --git a/drivers/usb/gadget/function/f_uac2.c b/drivers/usb/gadget/function/f_uac2.c index 897787d0803c..a0b52c262ad8 100644 --- a/drivers/usb/gadget/function/f_uac2.c +++ b/drivers/usb/gadget/function/f_uac2.c @@ -2013,6 +2013,7 @@ static ssize_t f_uac2_opts_##name##_store(struct config_item *item, \ { \ struct f_uac2_opts *opts = to_f_uac2_opts(item); \ char *split_page = NULL; \ + char *original_split_page = NULL; \ int ret = -EINVAL; \ char *token; \ u32 num; \ @@ -2027,6 +2028,7 @@ static ssize_t f_uac2_opts_##name##_store(struct config_item *item, \ i = 0; \ memset(opts->name##s, 0x00, sizeof(opts->name##s)); \ split_page = kstrdup(page, GFP_KERNEL); \ + original_split_page = split_page; \ while ((token = strsep(&split_page, ",")) != NULL) { \ ret = kstrtou32(token, 0, &num); \ if (ret) \ @@ -2037,7 +2039,7 @@ static ssize_t f_uac2_opts_##name##_store(struct config_item *item, \ }; \ \ end: \ - kfree(split_page); \ + kfree(original_split_page); \ mutex_unlock(&opts->lock); \ return ret; \ } \ -- 2.43.0