In the Linux kernel, the following vulnerability has been resolved:
net/sched: sch_taprio: properly cancel timer from taprio_destroy()
There is a comment in qdisc_create() about us not calling ops->reset() in some cases.
err_out4: /* * Any broken qdiscs that would require a ops->reset() here? * The qdisc was never in action so it shouldn't be necessary. */
As taprio sets a timer before actually receiving a packet, we need to cancel it from ops->destroy, just in case ops->reset has not been called.
syzbot reported:
ODEBUG: free active (active state 0) object type: hrtimer hint: advance_sched+0x0/0x9a0 arch/x86/include/asm/atomic64_64.h:22 WARNING: CPU: 0 PID: 8441 at lib/debugobjects.c:505 debug_print_object+0x16e/0x250 lib/debugobjects.c:505 Modules linked in: CPU: 0 PID: 8441 Comm: syz-executor813 Not tainted 5.14.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:debug_print_object+0x16e/0x250 lib/debugobjects.c:505 Code: ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 af 00 00 00 48 8b 14 dd e0 d3 e3 89 4c 89 ee 48 c7 c7 e0 c7 e3 89 e8 5b 86 11 05 <0f> 0b 83 05 85 03 92 09 01 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e c3 RSP: 0018:ffffc9000130f330 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 RDX: ffff88802baeb880 RSI: ffffffff815d87b5 RDI: fffff52000261e58 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff815d25ee R11: 0000000000000000 R12: ffffffff898dd020 R13: ffffffff89e3ce20 R14: ffffffff81653630 R15: dffffc0000000000 FS: 0000000000f0d300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffb64b3e000 CR3: 0000000036557000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __debug_check_no_obj_freed lib/debugobjects.c:987 [inline] debug_check_no_obj_freed+0x301/0x420 lib/debugobjects.c:1018 slab_free_hook mm/slub.c:1603 [inline] slab_free_freelist_hook+0x171/0x240 mm/slub.c:1653 slab_free mm/slub.c:3213 [inline] kfree+0xe4/0x540 mm/slub.c:4267 qdisc_create+0xbcf/0x1320 net/sched/sch_api.c:1299 tc_modify_qdisc+0x4c8/0x1a60 net/sched/sch_api.c:1663 rtnetlink_rcv_msg+0x413/0xb80 net/core/rtnetlink.c:5571 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2403 ___sys_sendmsg+0xf3/0x170 net/socket.c:2457 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2486 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 30, 2024 | May 21, 2024 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | May 21, 2024 |
| Suse | — | Upgrade kernel-default-vdsoUpgrade kernel-devel-azureUpgrade kernel-azureUpgrade kselftests-kmp-64kbUpgrade kernel-zfcpdumpUpgrade kernel-syms-azureUpgrade dtb-alteraUpgrade cluster-md-kmp-azureUpgrade kernel-azure-vdsoUpgrade kernel-source-rtUpgrade dtb-exynosUpgrade kernel-azure-develUpgrade kernel-kvmsmallUpgrade dtb-qcomUpgrade kernel-rt-livepatchUpgrade kernel-rtUpgrade kernel-obs-buildUpgrade kernel-azure-optionalUpgrade reiserfs-kmp-azureUpgrade gfs2-kmp-rtUpgrade dtb-rockchipUpgrade reiserfs-kmp-64kbUpgrade kernel-obs-qaUpgrade kernel-macrosUpgrade kernel-syms-rtUpgrade kernel-azure-livepatch-develUpgrade dtb-lgUpgrade kernel-rt_debug-vdsoUpgrade kernel-sourceUpgrade dtb-amlogicUpgrade dtb-armUpgrade kernel-rt-vdsoUpgrade kselftests-kmp-azureUpgrade dtb-apmUpgrade kernel-rt_debug-develUpgrade kernel-debug-livepatch-develUpgrade kernel-rt-extraUpgrade dlm-kmp-64kbUpgrade kernel-rt-optionalUpgrade kernel-source-azureUpgrade kernel-kvmsmall-develUpgrade kernel-rt-livepatch-develUpgrade ocfs2-kmp-rtUpgrade kernel-kvmsmall-vdsoUpgrade dtb-nvidiaUpgrade kernel-default-extraUpgrade kernel-default-base-rebuildUpgrade kernel-debug-vdsoUpgrade cluster-md-kmp-defaultUpgrade dlm-kmp-azureUpgrade ocfs2-kmp-64kbUpgrade kernel-defaultUpgrade kernel-debug-develUpgrade dtb-socionextUpgrade kernel-azure-extraUpgrade kernel-64kb-develUpgrade gfs2-kmp-64kbUpgrade kselftests-kmp-rtUpgrade kselftests-kmp-defaultUpgrade kernel-default-baseUpgrade kernel-debugUpgrade dlm-kmp-rtUpgrade kernel-64kb-extraUpgrade dtb-marvellUpgrade dtb-renesasUpgrade reiserfs-kmp-defaultUpgrade ocfs2-kmp-defaultUpgrade dtb-xilinxUpgrade dtb-freescaleUpgrade kernel-devel-rtUpgrade kernel-default-optionalUpgrade cluster-md-kmp-rtUpgrade kernel-default-livepatchUpgrade reiserfs-kmp-rtUpgrade dtb-hisiliconUpgrade kernel-source-vanillaUpgrade kernel-rt-develUpgrade kernel-rt_debug-livepatch-develUpgrade kernel-develUpgrade kernel-default-livepatch-develUpgrade kernel-64kb-livepatch-develUpgrade ocfs2-kmp-azureUpgrade gfs2-kmp-defaultUpgrade dtb-allwinnerUpgrade dtb-broadcomUpgrade kernel-64kb-optionalUpgrade kernel-64kbUpgrade gfs2-kmp-azureUpgrade kernel-rt_debugUpgrade dtb-appleUpgrade dtb-amazonUpgrade dtb-caviumUpgrade kernel-docs-htmlUpgrade dtb-mediatekUpgrade kernel-kvmsmall-livepatch-develUpgrade dlm-kmp-defaultUpgrade kernel-default-develUpgrade dtb-amdUpgrade kernel-symsUpgrade cluster-md-kmp-64kbUpgrade dtb-sprdUpgrade kernel-docs | Aug 9, 2024 | May 21, 2024 |
| Ubuntu | — | Upgrade linux-azure-5.4Upgrade linux-bluefieldUpgrade linux-oracleUpgrade linux-kvmUpgrade linux-azureUpgrade linux-awsUpgrade linux-raspiUpgrade linux-aws-5.4Upgrade linuxUpgrade linux-gcp-5.4Upgrade linux-oracle-5.4Upgrade linux-hwe-5.4Upgrade linux-fipsUpgrade linux-gkeopUpgrade linux-raspi-5.4Upgrade linux-ibmUpgrade linux-gcp | Nov 19, 2024 | May 21, 2024 |
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