diff mbox series

[BlueZ,v1,1/3] shared/gatt-db: Fix possible crash on gatt_db_clone

Message ID 20241209205843.1394081-1-luiz.dentz@gmail.com
State New
Headers show
Series [BlueZ,v1,1/3] shared/gatt-db: Fix possible crash on gatt_db_clone | expand

Commit Message

Luiz Augusto von Dentz Dec. 9, 2024, 8:58 p.m. UTC
From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

The following crash can happen if the original gatt_db has incomplete
service definitions since the attribute might still be discovering:

 Invalid read of size 4
    at 0x1E5A39: bt_uuid_len (uuid.h:289)
    by 0x1E5A39: service_clone (gatt-db.c:284)
    by 0x1D5EBB: queue_foreach (queue.c:207)
    by 0x1E61CD: gatt_db_clone (gatt-db.c:329)
    by 0x1C18F0: btd_device_set_gatt_db (device.c:7110)
    by 0x1C9F96: foreach_rsi (set.c:295)
    by 0x1D5EBB: queue_foreach (queue.c:207)
    by 0x48EA91F: g_slist_foreach (in /usr/lib64/libglib-2.0.so.0.8000.3)
    by 0x1CA2C8: btd_set_add_device (set.c:357)
    by 0x1BB9AB: btd_device_add_set (device.c:2049)
    by 0x17FF76: csip_ready (csip.c:243)
    by 0x1FD5CC: csip_notify_ready (csip.c:546)
    by 0x1FD5CC: csip_idle (csip.c:630)
    by 0x1DE20C: idle_notify (gatt-client.c:171)
  Address 0xc is not stack'd, malloc'd or (recently) free'd
---
 src/shared/gatt-db.c | 3 +++
 1 file changed, 3 insertions(+)

Comments

bluez.test.bot@gmail.com Dec. 9, 2024, 10:11 p.m. UTC | #1
This is automated email and please do not reply to this email!

Dear submitter,

Thank you for submitting the patches to the linux bluetooth mailing list.
This is a CI test results with your patch series:
PW Link:https://patchwork.kernel.org/project/bluetooth/list/?series=916123

---Test result---

Test Summary:
CheckPatch                    PENDING   0.25 seconds
GitLint                       PENDING   0.21 seconds
BuildEll                      PASS      20.58 seconds
BluezMake                     PASS      1622.58 seconds
MakeCheck                     PASS      13.49 seconds
MakeDistcheck                 PASS      158.61 seconds
CheckValgrind                 PASS      213.09 seconds
CheckSmatch                   WARNING   271.64 seconds
bluezmakeextell               PASS      98.67 seconds
IncrementalBuild              PENDING   0.30 seconds
ScanBuild                     PASS      841.73 seconds

Details
##############################
Test: CheckPatch - PENDING
Desc: Run checkpatch.pl script
Output:

##############################
Test: GitLint - PENDING
Desc: Run gitlint
Output:

##############################
Test: CheckSmatch - WARNING
Desc: Run smatch tool with source
Output:
monitor/att.c: note: in included file:monitor/display.h:82:26: warning: Variable length array is used.monitor/packet.c: note: in included file:monitor/display.h:82:26: warning: Variable length array is used.monitor/packet.c:1868:26: warning: Variable length array is used.monitor/packet.c: note: in included file:monitor/bt.h:3606:52: warning: array of flexible structuresmonitor/bt.h:3594:40: warning: array of flexible structures
##############################
Test: IncrementalBuild - PENDING
Desc: Incremental build with the patches in the series
Output:



---
Regards,
Linux Bluetooth
patchwork-bot+bluetooth@kernel.org Dec. 10, 2024, 3:43 p.m. UTC | #2
Hello:

This series was applied to bluetooth/bluez.git (master)
by Luiz Augusto von Dentz <luiz.von.dentz@intel.com>:

On Mon,  9 Dec 2024 15:58:41 -0500 you wrote:
> From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
> 
> The following crash can happen if the original gatt_db has incomplete
> service definitions since the attribute might still be discovering:
> 
>  Invalid read of size 4
>     at 0x1E5A39: bt_uuid_len (uuid.h:289)
>     by 0x1E5A39: service_clone (gatt-db.c:284)
>     by 0x1D5EBB: queue_foreach (queue.c:207)
>     by 0x1E61CD: gatt_db_clone (gatt-db.c:329)
>     by 0x1C18F0: btd_device_set_gatt_db (device.c:7110)
>     by 0x1C9F96: foreach_rsi (set.c:295)
>     by 0x1D5EBB: queue_foreach (queue.c:207)
>     by 0x48EA91F: g_slist_foreach (in /usr/lib64/libglib-2.0.so.0.8000.3)
>     by 0x1CA2C8: btd_set_add_device (set.c:357)
>     by 0x1BB9AB: btd_device_add_set (device.c:2049)
>     by 0x17FF76: csip_ready (csip.c:243)
>     by 0x1FD5CC: csip_notify_ready (csip.c:546)
>     by 0x1FD5CC: csip_idle (csip.c:630)
>     by 0x1DE20C: idle_notify (gatt-client.c:171)
>   Address 0xc is not stack'd, malloc'd or (recently) free'd
> 
> [...]

Here is the summary with links:
  - [BlueZ,v1,1/3] shared/gatt-db: Fix possible crash on gatt_db_clone
    https://git.kernel.org/pub/scm/bluetooth/bluez.git/?id=0d9f5f6a8c14
  - [BlueZ,v1,2/3] main.conf: Add GATT.ExportClaimedServices
    https://git.kernel.org/pub/scm/bluetooth/bluez.git/?id=dbd6591bd1d0
  - [BlueZ,v1,3/3] monitor: Allow caching of temporary gatt_db
    (no matching commit)

You are awesome, thank you!
diff mbox series

Patch

diff --git a/src/shared/gatt-db.c b/src/shared/gatt-db.c
index b35763410d17..72254c7e41ba 100644
--- a/src/shared/gatt-db.c
+++ b/src/shared/gatt-db.c
@@ -278,6 +278,9 @@  static void service_clone(void *data, void *user_data)
 	for (i = 0; i < service->num_handles; i++) {
 		struct gatt_db_attribute *attr = service->attributes[i];
 
+		if (!attr)
+			continue;
+
 		/* Only clone values for characteristics declaration since that
 		 * is considered when calculating the db hash.
 		 */