[syzbot] [media?] memory leak in vidtv_psi_service_desc_init

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 05f7e89ab973 Linux 6.19
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1143533a580000
kernel config: https://syzkaller.appspot.com/x/.config?x=9d7d0fbecb37bff8
dashboard link: https://syzkaller.appspot.com/bug?extid=639ebc6ec75e96674741
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17ed6a52580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1587465a580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/1ad63df9059c/disk-05f7e89a.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/4f2b44c1d6fd/vmlinux-05f7e89a.xz
kernel image: https://storage.googleapis.com/syzbot-assets/9736a52697bc/bzImage-05f7e89a.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+639ebc...@syzkaller.appspotmail.com

BUG: memory leak
unreferenced object 0xffff888145b50820 (size 32):
comm "syz.0.17", pid 6068, jiffies 4294944486
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 48 19 02 0c 60 fd 02 09 ........H...`...
81 88 ff ff 0a 70 fd 02 09 81 88 ff ff 00 00 00 .....p..........
backtrace (crc 90a0c7d4):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4958 [inline]
slab_alloc_node mm/slub.c:5263 [inline]
__kmalloc_cache_noprof+0x41a/0x590 mm/slub.c:5775
kmalloc_noprof include/linux/slab.h:957 [inline]
kzalloc_noprof include/linux/slab.h:1094 [inline]
vidtv_psi_service_desc_init+0x74/0x1b0 drivers/media/test-drivers/vidtv/vidtv_psi.c:288
vidtv_channel_s302m_init+0xb1/0x2a0 drivers/media/test-drivers/vidtv/vidtv_channel.c:83
vidtv_channels_init+0x1b/0x40 drivers/media/test-drivers/vidtv/vidtv_channel.c:524
vidtv_mux_init+0x372/0x390 drivers/media/test-drivers/vidtv/vidtv_mux.c:515
vidtv_start_streaming drivers/media/test-drivers/vidtv/vidtv_bridge.c:194 [inline]
vidtv_start_feed+0x1d4/0x260 drivers/media/test-drivers/vidtv/vidtv_bridge.c:239
dmx_ts_feed_start_filtering+0x8e/0x130 drivers/media/dvb-core/dvb_demux.c:747
dvb_dmxdev_start_feed+0x11c/0x170 drivers/media/dvb-core/dmxdev.c:655
dvb_dmxdev_filter_start+0xd8/0x440 drivers/media/dvb-core/dmxdev.c:766
dvb_dmxdev_pes_filter_set drivers/media/dvb-core/dmxdev.c:963 [inline]
dvb_demux_do_ioctl+0x7a2/0x7d0 drivers/media/dvb-core/dmxdev.c:1077
dvb_usercopy+0x116/0x2d0 drivers/media/dvb-core/dvbdev.c:999
dvb_demux_ioctl+0x29/0x40 drivers/media/dvb-core/dmxdev.c:1186
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl fs/ioctl.c:583 [inline]
__x64_sys_ioctl+0xf4/0x140 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xa4/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f

BUG: memory leak
unreferenced object 0xffff88810902fd70 (size 16):
comm "syz.0.17", pid 6068, jiffies 4294944486
hex dump (first 16 bytes):
0b 42 65 65 74 68 6f 76 65 6e 00 00 00 00 00 00 .Beethoven......
backtrace (crc e88d86b):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4958 [inline]
slab_alloc_node mm/slub.c:5263 [inline]
__do_kmalloc_node mm/slub.c:5656 [inline]
__kmalloc_node_track_caller_noprof+0x47b/0x690 mm/slub.c:5768
__kmemdup_nul mm/util.c:64 [inline]
kstrdup+0x3c/0x80 mm/util.c:84
vidtv_psi_service_desc_init+0x17a/0x1b0 drivers/media/test-drivers/vidtv/vidtv_psi.c:305
vidtv_channel_s302m_init+0xb1/0x2a0 drivers/media/test-drivers/vidtv/vidtv_channel.c:83
vidtv_channels_init+0x1b/0x40 drivers/media/test-drivers/vidtv/vidtv_channel.c:524
vidtv_mux_init+0x372/0x390 drivers/media/test-drivers/vidtv/vidtv_mux.c:515
vidtv_start_streaming drivers/media/test-drivers/vidtv/vidtv_bridge.c:194 [inline]
vidtv_start_feed+0x1d4/0x260 drivers/media/test-drivers/vidtv/vidtv_bridge.c:239
dmx_ts_feed_start_filtering+0x8e/0x130 drivers/media/dvb-core/dvb_demux.c:747
dvb_dmxdev_start_feed+0x11c/0x170 drivers/media/dvb-core/dmxdev.c:655
dvb_dmxdev_filter_start+0xd8/0x440 drivers/media/dvb-core/dmxdev.c:766
dvb_dmxdev_pes_filter_set drivers/media/dvb-core/dmxdev.c:963 [inline]
dvb_demux_do_ioctl+0x7a2/0x7d0 drivers/media/dvb-core/dmxdev.c:1077
dvb_usercopy+0x116/0x2d0 drivers/media/dvb-core/dvbdev.c:999
dvb_demux_ioctl+0x29/0x40 drivers/media/dvb-core/dmxdev.c:1186
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl fs/ioctl.c:583 [inline]
__x64_sys_ioctl+0xf4/0x140 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xa4/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f

BUG: memory leak
unreferenced object 0xffff88810902fd60 (size 16):
comm "syz.0.17", pid 6068, jiffies 4294944486
hex dump (first 16 bytes):
0b 4c 69 6e 75 78 54 56 2e 6f 72 67 00 00 00 00 .LinuxTV.org....
backtrace (crc b60e4fc0):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4958 [inline]
slab_alloc_node mm/slub.c:5263 [inline]
__do_kmalloc_node mm/slub.c:5656 [inline]
__kmalloc_node_track_caller_noprof+0x47b/0x690 mm/slub.c:5768
__kmemdup_nul mm/util.c:64 [inline]
kstrdup+0x3c/0x80 mm/util.c:84
vidtv_psi_service_desc_init+0x130/0x1b0 drivers/media/test-drivers/vidtv/vidtv_psi.c:313
vidtv_channel_s302m_init+0xb1/0x2a0 drivers/media/test-drivers/vidtv/vidtv_channel.c:83
vidtv_channels_init+0x1b/0x40 drivers/media/test-drivers/vidtv/vidtv_channel.c:524
vidtv_mux_init+0x372/0x390 drivers/media/test-drivers/vidtv/vidtv_mux.c:515
vidtv_start_streaming drivers/media/test-drivers/vidtv/vidtv_bridge.c:194 [inline]
vidtv_start_feed+0x1d4/0x260 drivers/media/test-drivers/vidtv/vidtv_bridge.c:239
dmx_ts_feed_start_filtering+0x8e/0x130 drivers/media/dvb-core/dvb_demux.c:747
dvb_dmxdev_start_feed+0x11c/0x170 drivers/media/dvb-core/dmxdev.c:655
dvb_dmxdev_filter_start+0xd8/0x440 drivers/media/dvb-core/dmxdev.c:766
dvb_dmxdev_pes_filter_set drivers/media/dvb-core/dmxdev.c:963 [inline]
dvb_demux_do_ioctl+0x7a2/0x7d0 drivers/media/dvb-core/dmxdev.c:1077
dvb_usercopy+0x116/0x2d0 drivers/media/dvb-core/dvbdev.c:999
dvb_demux_ioctl+0x29/0x40 drivers/media/dvb-core/dmxdev.c:1186
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl fs/ioctl.c:583 [inline]
__x64_sys_ioctl+0xf4/0x140 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xa4/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f

BUG: memory leak
unreferenced object 0xffff888145b502c0 (size 32):
comm "syz.0.17", pid 6068, jiffies 4294944486
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 05 04 42 53 53 44 00 00 ..........BSSD..
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace (crc 168dca61):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4958 [inline]
slab_alloc_node mm/slub.c:5263 [inline]
__do_kmalloc_node mm/slub.c:5656 [inline]
__kmalloc_noprof+0x465/0x680 mm/slub.c:5669
kmalloc_noprof include/linux/slab.h:961 [inline]
kzalloc_noprof include/linux/slab.h:1094 [inline]
vidtv_psi_registration_desc_init+0x2d/0xd0 drivers/media/test-drivers/vidtv/vidtv_psi.c:337
vidtv_channel_s302m_init+0x132/0x2a0 drivers/media/test-drivers/vidtv/vidtv_channel.c:107
vidtv_channels_init+0x1b/0x40 drivers/media/test-drivers/vidtv/vidtv_channel.c:524
vidtv_mux_init+0x372/0x390 drivers/media/test-drivers/vidtv/vidtv_mux.c:515
vidtv_start_streaming drivers/media/test-drivers/vidtv/vidtv_bridge.c:194 [inline]
vidtv_start_feed+0x1d4/0x260 drivers/media/test-drivers/vidtv/vidtv_bridge.c:239
dmx_ts_feed_start_filtering+0x8e/0x130 drivers/media/dvb-core/dvb_demux.c:747
dvb_dmxdev_start_feed+0x11c/0x170 drivers/media/dvb-core/dmxdev.c:655
dvb_dmxdev_filter_start+0xd8/0x440 drivers/media/dvb-core/dmxdev.c:766
dvb_dmxdev_pes_filter_set drivers/media/dvb-core/dmxdev.c:963 [inline]
dvb_demux_do_ioctl+0x7a2/0x7d0 drivers/media/dvb-core/dmxdev.c:1077
dvb_usercopy+0x116/0x2d0 drivers/media/dvb-core/dvbdev.c:999
dvb_demux_ioctl+0x29/0x40 drivers/media/dvb-core/dmxdev.c:1186
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl fs/ioctl.c:583 [inline]
__x64_sys_ioctl+0xf4/0x140 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xa4/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f

connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF


---
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