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Mon, 09 Nov 2026 21:50:47 -0800 (PST) Date: Mon, 09 Nov 2026 21:50:47 -0800 In-Reply-To: <6ac94026.70ed5d86.2ac85.0077.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6af2b0b7.4dd4714a.f8d02.0021.GAE@google.com> Subject: Re: [syzbot] [media?] memory leak in vidtv_psi_pmt_create_sec_for_each_pat_entry From: syzbot To: dwlsalmeida@gmail.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, matheus.aalmeida@inf.ufrgs.br, mchehab@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: b3dfbde62cf1 Merge tag 'linux_kselftest-fixes-7.4-rc3' of .. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git console output: https://syzkaller.appspot.com/x/log.txt?x=13cfd83d580000 kernel config: https://syzkaller.appspot.com/x/.config?x=4361b1bb937ae1c4 dashboard link: https://syzkaller.appspot.com/bug?extid=3bb39e30be6cca84a865 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16436f35580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3bb39e30be6cca84a865@syzkaller.appspotmail.com BUG: memory leak unreferenced object 0xffff8881112c8690 (size 8): comm "syz.6.49", pid 6988, jiffies 4294945880 hex dump (first 8 bytes): 00 00 00 00 00 00 00 00 ........ backtrace (crc 0): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4733 [inline] slab_alloc_node mm/slub.c:5033 [inline] __do_kmalloc_node mm/slub.c:5530 [inline] __kmalloc_noprof+0x3ce/0x510 mm/slub.c:5556 _kmalloc_noprof include/linux/slab.h:995 [inline] _kzalloc_noprof include/linux/slab.h:1312 [inline] vidtv_psi_pmt_create_sec_for_each_pat_entry+0x7d/0x1b0 drivers/media/test-drivers/vidtv/vidtv_psi.c:1471 vidtv_channel_si_init+0x544/0x770 drivers/media/test-drivers/vidtv/vidtv_channel.c:478 vidtv_mux_init+0x115/0x390 drivers/media/test-drivers/vidtv/vidtv_mux.c:525 vidtv_start_streaming drivers/media/test-drivers/vidtv/vidtv_bridge.c:198 [inline] vidtv_start_feed+0x1d4/0x260 drivers/media/test-drivers/vidtv/vidtv_bridge.c:243 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:1072 dvb_usercopy+0x116/0x2d0 drivers/media/dvb-core/dvbdev.c:996 dvb_demux_ioctl+0x29/0x40 drivers/media/dvb-core/dmxdev.c:1208 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:61 [inline] do_syscall_64+0xe9/0x540 arch/x86/entry/syscall_64.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.