First published: Fri Jul 12 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: net/sched: act_api: fix possible infinite loop in tcf_idr_check_alloc() syzbot found hanging tasks waiting on rtnl_lock [1] A reproducer is available in the syzbot bug. When a request to add multiple actions with the same index is sent, the second request will block forever on the first request. This holds rtnl_lock, and causes tasks to hang. Return -EAGAIN to prevent infinite looping, while keeping documented behavior. [1] INFO: task kworker/1:0:5088 blocked for more than 143 seconds. Not tainted 6.9.0-rc4-syzkaller-00173-g3cdb45594619 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:0 state:D stack:23744 pid:5088 tgid:5088 ppid:2 flags:0x00004000 Workqueue: events_power_efficient reg_check_chans_work Call Trace: <TASK> context_switch kernel/sched/core.c:5409 [inline] __schedule+0xf15/0x5d00 kernel/sched/core.c:6746 __schedule_loop kernel/sched/core.c:6823 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6838 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 wiphy_lock include/net/cfg80211.h:5953 [inline] reg_leave_invalid_chans net/wireless/reg.c:2466 [inline] reg_check_chans_work+0x10a/0x10e0 net/wireless/reg.c:2481
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Software | Affected Version | How to fix |
---|---|---|
Linux Linux kernel | >=4.19<5.4.279 | |
Linux Linux kernel | >=5.5<5.10.221 | |
Linux Linux kernel | >=5.11<5.15.162 | |
Linux Linux kernel | >=5.16<6.1.96 | |
Linux Linux kernel | >=6.2<6.6.36 | |
Linux Linux kernel | >=6.7<6.9.7 | |
Linux Linux kernel | =6.10-rc1 | |
Linux Linux kernel | =6.10-rc2 | |
Linux Linux kernel | =6.10-rc3 | |
Linux Linux kernel | =6.10-rc4 | |
redhat/kernel | <5.4.279 | 5.4.279 |
redhat/kernel | <5.10.221 | 5.10.221 |
redhat/kernel | <5.15.162 | 5.15.162 |
redhat/kernel | <6.1.96 | 6.1.96 |
redhat/kernel | <6.6.36 | 6.6.36 |
redhat/kernel | <6.9.7 | 6.9.7 |
redhat/kernel | <6.10 | 6.10 |
debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.12.6-1 |
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