Mauro Carvalho Chehab ec21a38df7 Revert "media: dvb-core: Fix use-after-free on race condition at dvb_frontend" ... As reported by Thomas Voegtle <tv@lio96.de>, sometimes a DVB card does not initialize properly booting Linux 6.4-rc4. This is not always, maybe in 3 out of 4 attempts. After double-checking, the root cause seems to be related to the UAF fix, which is causing a race issue: [ 26.332149] tda10071 7-0005: found a 'NXP TDA10071' in cold state, will try to load a firmware [ 26.340779] tda10071 7-0005: downloading firmware from file 'dvb-fe-tda10071.fw' [ 989.277402] INFO: task vdr:743 blocked for more than 491 seconds. [ 989.283504] Not tainted 6.4.0-rc5-i5 #249 [ 989.288036] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 989.295860] task:vdr state:D stack:0 pid:743 ppid:711 flags:0x00004002 [ 989.295865] Call Trace: [ 989.295867] <TASK> [ 989.295869] __schedule+0x2ea/0x12d0 [ 989.295877] ? asm_sysvec_apic_timer_interrupt+0x16/0x20 [ 989.295881] schedule+0x57/0xc0 [ 989.295884] schedule_preempt_disabled+0xc/0x20 [ 989.295887] __mutex_lock.isra.16+0x237/0x480 [ 989.295891] ? dvb_get_property.isra.10+0x1bc/0xa50 [ 989.295898] ? dvb_frontend_stop+0x36/0x180 [ 989.338777] dvb_frontend_stop+0x36/0x180 [ 989.338781] dvb_frontend_open+0x2f1/0x470 [ 989.338784] dvb_device_open+0x81/0xf0 [ 989.338804] ? exact_lock+0x20/0x20 [ 989.338808] chrdev_open+0x7f/0x1c0 [ 989.338811] ? generic_permission+0x1a2/0x230 [ 989.338813] ? link_path_walk.part.63+0x340/0x380 [ 989.338815] ? exact_lock+0x20/0x20 [ 989.338817] do_dentry_open+0x18e/0x450 [ 989.374030] path_openat+0xca5/0xe00 [ 989.374031] ? terminate_walk+0xec/0x100 [ 989.374034] ? path_lookupat+0x93/0x140 [ 989.374036] do_filp_open+0xc0/0x140 [ 989.374038] ? __call_rcu_common.constprop.91+0x92/0x240 [ 989.374041] ? __check_object_size+0x147/0x260 [ 989.374043] ? __check_object_size+0x147/0x260 [ 989.374045] ? alloc_fd+0xbb/0x180 [ 989.374048] ? do_sys_openat2+0x243/0x310 [ 989.374050] do_sys_openat2+0x243/0x310 [ 989.374052] do_sys_open+0x52/0x80 [ 989.374055] do_syscall_64+0x5b/0x80 [ 989.421335] ? __task_pid_nr_ns+0x92/0xa0 [ 989.421337] ? syscall_exit_to_user_mode+0x20/0x40 [ 989.421339] ? do_syscall_64+0x67/0x80 [ 989.421341] ? syscall_exit_to_user_mode+0x20/0x40 [ 989.421343] ? do_syscall_64+0x67/0x80 [ 989.421345] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 989.421348] RIP: 0033:0x7fe895d067e3 [ 989.421349] RSP: 002b:00007fff933c2ba0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 [ 989.421351] RAX: ffffffffffffffda RBX: 00007fff933c2c10 RCX: 00007fe895d067e3 [ 989.421352] RDX: 0000000000000802 RSI: 00005594acdce160 RDI: 00000000ffffff9c [ 989.421353] RBP: 0000000000000802 R08: 0000000000000000 R09: 0000000000000000 [ 989.421353] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001 [ 989.421354] R13: 00007fff933c2ca0 R14: 00000000ffffffff R15: 00007fff933c2c90 [ 989.421355] </TASK> This reverts commit 6769a0b7ee. Fixes: 6769a0b7ee ("media: dvb-core: Fix use-after-free on race condition at dvb_frontend") Link: https://lore.kernel.org/all/da5382ad-09d6-20ac-0d53-611594b30861@lio96.de/ Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>		2023-06-14 23:16:29 +01:00
..
davinci	media updates for v6.3-rc1	2023-02-26 11:47:26 -08:00
drv-intf	media: saa7146: convert to vb2	2023-04-15 08:53:31 +01:00
i2c	media: i2c: Drop unused sr030pc30 camera sensor driver	2023-04-15 09:56:49 +01:00
tpg	media: v4l2-tpg: add HDMI Video Guard Band test pattern	2022-06-20 10:30:30 +01:00
cec-notifier.h	Update rmk's email address in various drivers	2020-04-21 17:50:09 +01:00
cec-pin.h	media: cec-gpio: handle gpiod_get_value errors correctly	2020-04-29 12:04:38 +02:00
cec.h	media: cec-adap.c: drop activate_cnt, use state info instead	2022-05-13 11:29:39 +02:00
demux.h	…
dmxdev.h	media: dmxdev: drop unneeded <linux/kernel.h> inclusion from other headers	2021-12-14 16:19:04 +01:00
dvb-usb-ids.h	media: dvb-usb: dib0700_devices: use an enum for the device number	2022-04-18 07:36:44 +02:00
dvb_ca_en50221.h	…
dvb_demux.h	…
dvb_frontend.h	Revert "media: dvb-core: Fix use-after-free on race condition at dvb_frontend"	2023-06-14 23:16:29 +01:00
dvb_math.h	…
dvb_net.h	media: dvb-core: Fix use-after-free due on race condition at dvb_net	2023-05-14 06:30:45 +01:00
dvb_ringbuffer.h	media: dvb_ringbuffer: Fix typo in dvb_ringbuffer_pkt_write() kerneldoc	2022-11-25 09:45:47 +00:00
dvb_vb2.h	…
dvbdev.h	media: dvb-core: Fix use-after-free due to race at dvb_register_device()	2023-05-14 06:30:58 +01:00
frame_vector.h	media: videobuf2: revert "get_userptr: buffers are always writable"	2022-12-06 07:14:31 +00:00
imx.h	…
media-dev-allocator.h	media: Fix Media Controller API config checks	2021-06-24 14:26:00 +02:00
media-device.h	media: mc-device: remove unnecessary __must_check	2023-04-11 18:54:01 +02:00
media-devnode.h	media: media-devnode.h: drop duplicated word in comment	2020-07-19 14:00:12 +02:00
media-entity.h	media: mc: entity: Add entity iterator for media_pipeline	2023-02-06 08:33:44 +01:00
media-request.h	…
mipi-csi2.h	media: Add MIPI CSI-2 28 bits per pixel raw data type	2022-05-17 09:17:26 +02:00
ov_16bit_addr_reg_helpers.h	media: core: add ov_16bit_addr_reg_helpers.h	2023-02-08 08:23:50 +01:00
rc-core.h	media: rc-core: rename ir_raw_event_reset to ir_raw_event_overflow	2022-01-28 19:32:50 +01:00
rc-map.h	media: rc: add Beelink Mini MXIII keymap	2023-03-19 22:21:54 +01:00
rcar-fcp.h	…
tuner-types.h	…
tuner.h	Linux 5.15-rc4	2021-10-04 07:52:13 +02:00
tveeprom.h	media: drop unnecessary networking includes	2023-03-19 22:50:06 +01:00
v4l2-async.h	media: v4l2-async: Add notifier operation to destroy asd instances	2022-07-17 11:20:08 +01:00
v4l2-common.h	media fixes for v6.1-rc2	2022-10-22 15:30:15 -07:00
v4l2-ctrls.h	media: v4l2-ctrls: Fix doc for v4l2_ctrl_request_hdl_find	2023-03-20 16:21:47 +01:00
v4l2-dev.h	media: mc: convert pipeline funcs to take media_pad	2022-09-24 09:22:30 +02:00
v4l2-device.h	media: fix kernel-doc markups	2020-11-16 10:31:16 +01:00
v4l2-dv-timings.h	media: fix kernel-doc markups	2020-11-16 10:31:16 +01:00
v4l2-event.h	media: v4l2-dev/event: add v4l2_event_wake_all()	2021-01-04 13:14:25 +01:00
v4l2-fh.h	media: v4l2-fh: define v4l2_fh struct regardless of condition	2020-04-21 13:40:06 +02:00
v4l2-flash-led-class.h	…
v4l2-fwnode.h	media: Remove incorrect comment from struct v4l2_fwnode_endpoint	2022-09-24 09:06:49 +02:00
v4l2-h264.h	media: h264: Sort p/b reflist using frame_num	2022-05-17 10:02:29 +02:00
v4l2-image-sizes.h	media: v4l2-image-sizes: add HD and Full-HD definitions	2020-04-21 17:21:51 +02:00
v4l2-ioctl.h	media: v4l2: prepare compat-ioctl rework	2020-11-16 10:31:05 +01:00
v4l2-jpeg.h	media: Add parsing for APP14 data segment in jpeg helpers	2021-03-22 10:35:36 +01:00
v4l2-mc.h	media: Accept non-subdev sinks in v4l2_create_fwnode_links_to_pad()	2023-04-11 18:54:01 +02:00
v4l2-mediabus.h	media: v4l2-mediabus: add support for dual edge sampling	2022-12-07 17:58:46 +01:00
v4l2-mem2mem.h	media: media/v4l2-mem2mem.h: rename 'videobuf' to 'vb2'	2022-08-29 15:47:03 +02:00
v4l2-rect.h	media: v4l2-rect.h: add enclosed rectangle helper	2020-07-04 12:29:38 +02:00
v4l2-subdev.h	media: v4l2-subdev: Fix missing kerneldoc for client_caps	2023-06-02 18:46:09 +01:00
v4l2-vp9.h	media: Add VP9 v4l2 library	2021-11-22 07:47:13 +00:00
videobuf-core.h	…
videobuf-dma-contig.h	…
videobuf-dma-sg.h	media: videobuf-dma-sg: number of pages should be unsigned long	2020-09-03 11:12:20 +02:00
videobuf-vmalloc.h	…
videobuf2-core.h	media: vb2: add (un)prepare_streaming queue ops	2022-11-25 07:39:46 +00:00
videobuf2-dma-contig.h	media: videobuf2-dma-contig: fix bad kfree in vb2_dma_contig_clear_max_seg_size	2020-06-11 19:20:55 +02:00
videobuf2-dma-sg.h	…
videobuf2-dvb.h	media: vb2: videobuf -> videobuf2	2022-08-29 15:38:09 +02:00
videobuf2-memops.h	media: videobuf2: revert "get_userptr: buffers are always writable"	2022-12-06 07:14:31 +00:00
videobuf2-v4l2.h	media: videobuf2: Remove vb2_find_timestamp()	2022-08-30 14:44:45 +02:00
videobuf2-vmalloc.h	…
vsp1.h	media: vsp1: Add premultiplied alpha support	2022-09-07 23:48:39 +03:00