CVE-2024-42114

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> wifi: cfg80211: restrict NL80211_ATTR_TXQ_QUANTUM values<br /> <br /> syzbot is able to trigger softlockups, setting NL80211_ATTR_TXQ_QUANTUM<br /> to 2^31.<br /> <br /> We had a similar issue in sch_fq, fixed with commit<br /> d9e15a273306 ("pkt_sched: fq: do not accept silly TCA_FQ_QUANTUM")<br /> <br /> watchdog: BUG: soft lockup - CPU#1 stuck for 26s! [kworker/1:0:24]<br /> Modules linked in:<br /> irq event stamp: 131135<br /> hardirqs last enabled at (131134): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline]<br /> hardirqs last enabled at (131134): [] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:95<br /> hardirqs last disabled at (131135): [] __el1_irq arch/arm64/kernel/entry-common.c:533 [inline]<br /> hardirqs last disabled at (131135): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:551<br /> softirqs last enabled at (125892): [] neigh_hh_init net/core/neighbour.c:1538 [inline]<br /> softirqs last enabled at (125892): [] neigh_resolve_output+0x268/0x658 net/core/neighbour.c:1553<br /> softirqs last disabled at (125896): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19<br /> CPU: 1 PID: 24 Comm: kworker/1:0 Not tainted 6.9.0-rc7-syzkaller-gfda5695d692c #0<br /> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024<br /> Workqueue: mld mld_ifc_work<br /> pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)<br /> pc : __list_del include/linux/list.h:195 [inline]<br /> pc : __list_del_entry include/linux/list.h:218 [inline]<br /> pc : list_move_tail include/linux/list.h:310 [inline]<br /> pc : fq_tin_dequeue include/net/fq_impl.h:112 [inline]<br /> pc : ieee80211_tx_dequeue+0x6b8/0x3b4c net/mac80211/tx.c:3854<br /> lr : __list_del_entry include/linux/list.h:218 [inline]<br /> lr : list_move_tail include/linux/list.h:310 [inline]<br /> lr : fq_tin_dequeue include/net/fq_impl.h:112 [inline]<br /> lr : ieee80211_tx_dequeue+0x67c/0x3b4c net/mac80211/tx.c:3854<br /> sp : ffff800093d36700<br /> x29: ffff800093d36a60 x28: ffff800093d36960 x27: dfff800000000000<br /> x26: ffff0000d800ad50 x25: ffff0000d800abe0 x24: ffff0000d800abf0<br /> x23: ffff0000e0032468 x22: ffff0000e00324d4 x21: ffff0000d800abf0<br /> x20: ffff0000d800abf8 x19: ffff0000d800abf0 x18: ffff800093d363c0<br /> x17: 000000000000d476 x16: ffff8000805519dc x15: ffff7000127a6cc8<br /> x14: 1ffff000127a6cc8 x13: 0000000000000004 x12: ffffffffffffffff<br /> x11: ffff7000127a6cc8 x10: 0000000000ff0100 x9 : 0000000000000000<br /> x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000<br /> x5 : ffff80009287aa08 x4 : 0000000000000008 x3 : ffff80008034c7fc<br /> x2 : ffff0000e0032468 x1 : 00000000da0e46b8 x0 : ffff0000e0032470<br /> Call trace:<br /> __list_del include/linux/list.h:195 [inline]<br /> __list_del_entry include/linux/list.h:218 [inline]<br /> list_move_tail include/linux/list.h:310 [inline]<br /> fq_tin_dequeue include/net/fq_impl.h:112 [inline]<br /> ieee80211_tx_dequeue+0x6b8/0x3b4c net/mac80211/tx.c:3854<br /> wake_tx_push_queue net/mac80211/util.c:294 [inline]<br /> ieee80211_handle_wake_tx_queue+0x118/0x274 net/mac80211/util.c:315<br /> drv_wake_tx_queue net/mac80211/driver-ops.h:1350 [inline]<br /> schedule_and_wake_txq net/mac80211/driver-ops.h:1357 [inline]<br /> ieee80211_queue_skb+0x18e8/0x2244 net/mac80211/tx.c:1664<br /> ieee80211_tx+0x260/0x400 net/mac80211/tx.c:1966<br /> ieee80211_xmit+0x278/0x354 net/mac80211/tx.c:2062<br /> __ieee80211_subif_start_xmit+0xab8/0x122c net/mac80211/tx.c:4338<br /> ieee80211_subif_start_xmit+0xe0/0x438 net/mac80211/tx.c:4532<br /> __netdev_start_xmit include/linux/netdevice.h:4903 [inline]<br /> netdev_start_xmit include/linux/netdevice.h:4917 [inline]<br /> xmit_one net/core/dev.c:3531 [inline]<br /> dev_hard_start_xmit+0x27c/0x938 net/core/dev.c:3547<br /> __dev_queue_xmit+0x1678/0x33fc net/core/dev.c:4341<br /> dev_queue_xmit include/linux/netdevice.h:3091 [inline]<br /> neigh_resolve_output+0x558/0x658 net/core/neighbour.c:1563<br /> neigh_output include/net/neighbour.h:542 [inline]<br /> ip6_fini<br /> ---truncated---