memory leak in vidtv_psi_registration_desc_init

Status: upstream: reported C repro on 2026/07/14 09:40
Subsystems: media
Labels: prio:high
[Documentation on labels]
Reported-by: syzbot+e9a1f5e196de6663631b@syzkaller.appspotmail.com
Fix commit: media: dvb-core: fix feed leak on failed DMX_ADD_PID
Patched on: [ci-upstream-linux-next-kasan-gce-root], 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 ci-upstream-rust-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce ci2-upstream-usb]
First crash: 36d, last: 25d
▶ ▼ ✨ AI Jobs (1)
ID Workflow Result Correct Bug Created Started Finished Revision
8079db57 assessment-security DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ✅ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ ❓ memory leak in vidtv_psi_registration_desc_init 2026/07/10 09:30 2026/07/10 09:30 2026/07/10 10:13 4167ee25
▶ ▼ Duplicate bugs (1)
Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
memory leak in vidtv_psi_sdt_service_init media prio:high 3 syz, C 1 19d 15d 0/29 closed as dup on 2026/07/31 17:21
▶ ▼ Discussions (2)
Title Replies (including bot) Last reply
[PATCH] media: dvb-core: fix feed leak on failed DMX_ADD_PID 1 (1) 2026/07/14 14:10
[syzbot] [media?] memory leak in vidtv_psi_registration_desc_init 0 (3) 2026/07/14 12:18
▶ ▼ Last patch testing requests (2)
Created Duration User Patch Repo Result
2026/07/14 12:18 30m michail.tatas@gmail.com patch upstream OK log
2026/07/14 11:28 58m rwarwatkar@gmail.com patch upstream OK log

Sample crash report:
BUG: memory leak
unreferenced object 0xffff8881111a7320 (size 32):
  comm "syz.0.17", pid 5953, jiffies 4294942075
  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:4625 [inline]
    slab_alloc_node mm/slub.c:4945 [inline]
    __do_kmalloc_node mm/slub.c:5361 [inline]
    __kmalloc_noprof+0x3bf/0x550 mm/slub.c:5387
    _kmalloc_noprof include/linux/slab.h:973 [inline]
    _kzalloc_noprof include/linux/slab.h:1290 [inline]
    vidtv_psi_registration_desc_init+0x2d/0xd0 drivers/media/test-drivers/vidtv/vidtv_psi.c:282
    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:528
    vidtv_mux_init+0x377/0x390 drivers/media/test-drivers/vidtv/vidtv_mux.c:521
    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:658
    dvb_dmxdev_filter_start+0xd8/0x440 drivers/media/dvb-core/dmxdev.c:769
    dvb_demux_do_ioctl+0x297/0x7d0 drivers/media/dvb-core/dmxdev.c:1065
    dvb_usercopy+0x116/0x2d0 drivers/media/dvb-core/dvbdev.c:996
    dvb_demux_ioctl+0x29/0x40 drivers/media/dvb-core/dmxdev.c:1201
    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+0xf8/0x610 arch/x86/entry/syscall_64.c:94
    entry_SYSCALL_64_after_hwframe+0x77/0x7f

BUG: memory leak
unreferenced object 0xffff8881155b95c0 (size 64):
  comm "syz.0.17", pid 5953, jiffies 4294942075
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 4d 8b b0 aa 5c 0e 81 88  ........M...\...
    ff ff 20 c0 93 5b 15 81 88 ff ff 66 80 7c 5b 15  .. ..[.....f.|[.
  backtrace (crc c558b2d6):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4625 [inline]
    slab_alloc_node mm/slub.c:4945 [inline]
    __kmalloc_cache_noprof+0x356/0x440 mm/slub.c:5511
    _kmalloc_noprof include/linux/slab.h:969 [inline]
    _kzalloc_noprof include/linux/slab.h:1290 [inline]
    vidtv_psi_short_event_desc_init+0x9e/0x220 drivers/media/test-drivers/vidtv/vidtv_psi.c:389
    vidtv_channel_s302m_init+0x1c2/0x2a0 drivers/media/test-drivers/vidtv/vidtv_channel.c:124
    vidtv_channels_init+0x1b/0x40 drivers/media/test-drivers/vidtv/vidtv_channel.c:528
    vidtv_mux_init+0x377/0x390 drivers/media/test-drivers/vidtv/vidtv_mux.c:521
    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:658
    dvb_dmxdev_filter_start+0xd8/0x440 drivers/media/dvb-core/dmxdev.c:769
    dvb_demux_do_ioctl+0x297/0x7d0 drivers/media/dvb-core/dmxdev.c:1065
    dvb_usercopy+0x116/0x2d0 drivers/media/dvb-core/dvbdev.c:996
    dvb_demux_ioctl+0x29/0x40 drivers/media/dvb-core/dmxdev.c:1201
    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+0xf8/0x610 arch/x86/entry/syscall_64.c:94
    entry_SYSCALL_64_after_hwframe+0x77/0x7f

BUG: memory leak
unreferenced object 0xffff88810e5caab0 (size 8):
  comm "syz.0.17", pid 5953, jiffies 4294942075
  hex dump (first 8 bytes):
    65 6e 67 00 00 00 00 00                          eng.....
  backtrace (crc 5673a685):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4625 [inline]
    slab_alloc_node mm/slub.c:4945 [inline]
    __do_kmalloc_node mm/slub.c:5361 [inline]
    __kmalloc_node_track_caller_noprof+0x3d3/0x570 mm/slub.c:5497
    __kmemdup_nul mm/util.c:64 [inline]
    kstrdup+0x3c/0x80 mm/util.c:84
    vidtv_psi_short_event_desc_init+0xf3/0x220 drivers/media/test-drivers/vidtv/vidtv_psi.c:407
    vidtv_channel_s302m_init+0x1c2/0x2a0 drivers/media/test-drivers/vidtv/vidtv_channel.c:124
    vidtv_channels_init+0x1b/0x40 drivers/media/test-drivers/vidtv/vidtv_channel.c:528
    vidtv_mux_init+0x377/0x390 drivers/media/test-drivers/vidtv/vidtv_mux.c:521
    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:658
    dvb_dmxdev_filter_start+0xd8/0x440 drivers/media/dvb-core/dmxdev.c:769
    dvb_demux_do_ioctl+0x297/0x7d0 drivers/media/dvb-core/dmxdev.c:1065
    dvb_usercopy+0x116/0x2d0 drivers/media/dvb-core/dvbdev.c:996
    dvb_demux_ioctl+0x29/0x40 drivers/media/dvb-core/dmxdev.c:1201
    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+0xf8/0x610 arch/x86/entry/syscall_64.c:94
    entry_SYSCALL_64_after_hwframe+0x77/0x7f

BUG: memory leak
unreferenced object 0xffff8881155b93c0 (size 64):
  comm "syz.0.17", pid 5953, jiffies 4294942075
  hex dump (first 32 bytes):
    0b 4c 75 64 77 69 67 20 76 61 6e 20 42 65 65 74  .Ludwig van Beet
    68 6f 76 65 6e 3a 20 46 fc 72 20 45 6c 69 73 65  hoven: F.r Elise
  backtrace (crc 6d5386ce):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4625 [inline]
    slab_alloc_node mm/slub.c:4945 [inline]
    __do_kmalloc_node mm/slub.c:5361 [inline]
    __kmalloc_node_track_caller_noprof+0x3d3/0x570 mm/slub.c:5497
    __kmemdup_nul mm/util.c:64 [inline]
    kstrdup+0x3c/0x80 mm/util.c:84
    vidtv_psi_short_event_desc_init+0x1f0/0x220 drivers/media/test-drivers/vidtv/vidtv_psi.c:412
    vidtv_channel_s302m_init+0x1c2/0x2a0 drivers/media/test-drivers/vidtv/vidtv_channel.c:124
    vidtv_channels_init+0x1b/0x40 drivers/media/test-drivers/vidtv/vidtv_channel.c:528
    vidtv_mux_init+0x377/0x390 drivers/media/test-drivers/vidtv/vidtv_mux.c:521
    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:658
    dvb_dmxdev_filter_start+0xd8/0x440 drivers/media/dvb-core/dmxdev.c:769
    dvb_demux_do_ioctl+0x297/0x7d0 drivers/media/dvb-core/dmxdev.c:1065
    dvb_usercopy+0x116/0x2d0 drivers/media/dvb-core/dvbdev.c:996
    dvb_demux_ioctl+0x29/0x40 drivers/media/dvb-core/dmxdev.c:1201
    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+0xf8/0x610 arch/x86/entry/syscall_64.c:94
    entry_SYSCALL_64_after_hwframe+0x77/0x7f

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

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/07/21 00:06 upstream 1590cf032971 de6a700d .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-gce-leak memory leak in vidtv_psi_registration_desc_init
2026/07/10 09:30 upstream 2c7c88a412aa 4167ee25 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-gce-leak memory leak in vidtv_psi_registration_desc_init
* Struck through repros no longer work on HEAD.