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memory leak in vidtv_psi_service_desc_init

Status: upstream: reported C repro on 2026/02/10 04:09
Subsystems: media
[Documentation on labels]
Reported-by: syzbot+639ebc6ec75e96674741@syzkaller.appspotmail.com
Fix commit: media: vidtv: fix nfeeds state corruption on start_streaming failure
Patched on: [ci-upstream-linux-next-kasan-gce-root ci-upstream-rust-kasan-gce], missing on: [ci-qemu-gce-upstream-auto ci-qemu-native-arm64-kvm ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-qemu2-riscv64 ci-snapshot-upstream-root ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-arm64 ci-upstream-gce-leak ci-upstream-kasan-badwrites-root ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce-386-root ci-upstream-kmsan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce ci2-upstream-usb]
First crash: 38d, last: 38d
▶ ▼ Discussions (2)
Title Replies (including bot) Last reply
[PATCH] media: vidtv: fix nfeeds state corruption on start_streaming failure 1 (1) 2026/03/01 21:07
[syzbot] [media?] memory leak in vidtv_psi_service_desc_init 0 (1) 2026/02/10 04:09
▶ ▼ Last patch testing requests (1)
Created Duration User Patch Repo Result
2026/02/24 13:52 12m retest repro upstream report log

Sample crash report:
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

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/02/09 22:03 upstream 05f7e89ab973 df949cd9 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-gce-leak memory leak in vidtv_psi_service_desc_init
* Struck through repros no longer work on HEAD.