From: Greg Kroah-Hartman Date: Thu, 8 Jan 2026 12:30:54 +0000 (+0100) Subject: 5.10-stable patches X-Git-Tag: v6.1.160~52 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=8556c9a1ecf73da2406c7d64ef473358a29b9df3;p=thirdparty%2Fkernel%2Fstable-queue.git 5.10-stable patches added patches: rdma-core-fix-kasan-slab-use-after-free-read-in-ib_register_device-problem.patch --- diff --git a/queue-5.10/rdma-core-fix-kasan-slab-use-after-free-read-in-ib_register_device-problem.patch b/queue-5.10/rdma-core-fix-kasan-slab-use-after-free-read-in-ib_register_device-problem.patch new file mode 100644 index 0000000000..368cc06a83 --- /dev/null +++ b/queue-5.10/rdma-core-fix-kasan-slab-use-after-free-read-in-ib_register_device-problem.patch @@ -0,0 +1,85 @@ +From d0706bfd3ee40923c001c6827b786a309e2a8713 Mon Sep 17 00:00:00 2001 +From: Zhu Yanjun +Date: Tue, 6 May 2025 17:10:08 +0200 +Subject: RDMA/core: Fix "KASAN: slab-use-after-free Read in ib_register_device" problem + +From: Zhu Yanjun + +commit d0706bfd3ee40923c001c6827b786a309e2a8713 upstream. + +Call Trace: + + __dump_stack lib/dump_stack.c:94 [inline] + dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 + print_address_description mm/kasan/report.c:408 [inline] + print_report+0xc3/0x670 mm/kasan/report.c:521 + kasan_report+0xe0/0x110 mm/kasan/report.c:634 + strlen+0x93/0xa0 lib/string.c:420 + __fortify_strlen include/linux/fortify-string.h:268 [inline] + get_kobj_path_length lib/kobject.c:118 [inline] + kobject_get_path+0x3f/0x2a0 lib/kobject.c:158 + kobject_uevent_env+0x289/0x1870 lib/kobject_uevent.c:545 + ib_register_device drivers/infiniband/core/device.c:1472 [inline] + ib_register_device+0x8cf/0xe00 drivers/infiniband/core/device.c:1393 + rxe_register_device+0x275/0x320 drivers/infiniband/sw/rxe/rxe_verbs.c:1552 + rxe_net_add+0x8e/0xe0 drivers/infiniband/sw/rxe/rxe_net.c:550 + rxe_newlink+0x70/0x190 drivers/infiniband/sw/rxe/rxe.c:225 + nldev_newlink+0x3a3/0x680 drivers/infiniband/core/nldev.c:1796 + rdma_nl_rcv_msg+0x387/0x6e0 drivers/infiniband/core/netlink.c:195 + rdma_nl_rcv_skb.constprop.0.isra.0+0x2e5/0x450 + netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] + netlink_unicast+0x53a/0x7f0 net/netlink/af_netlink.c:1339 + netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1883 + sock_sendmsg_nosec net/socket.c:712 [inline] + __sock_sendmsg net/socket.c:727 [inline] + ____sys_sendmsg+0xa95/0xc70 net/socket.c:2566 + ___sys_sendmsg+0x134/0x1d0 net/socket.c:2620 + __sys_sendmsg+0x16d/0x220 net/socket.c:2652 + do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] + do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 + entry_SYSCALL_64_after_hwframe+0x77/0x7f + +This problem is similar to the problem that the +commit 1d6a9e7449e2 ("RDMA/core: Fix use-after-free when rename device name") +fixes. + +The root cause is: the function ib_device_rename() renames the name with +lock. But in the function kobject_uevent(), this name is accessed without +lock protection at the same time. + +The solution is to add the lock protection when this name is accessed in +the function kobject_uevent(). + +Fixes: 779e0bf47632 ("RDMA/core: Do not indicate device ready when device enablement fails") +Link: https://patch.msgid.link/r/20250506151008.75701-1-yanjun.zhu@linux.dev +Reported-by: syzbot+e2ce9e275ecc70a30b72@syzkaller.appspotmail.com +Closes: https://syzkaller.appspot.com/bug?extid=e2ce9e275ecc70a30b72 +Signed-off-by: Zhu Yanjun +Signed-off-by: Jason Gunthorpe +Signed-off-by: Sasha Levin +[ Ajay: Modified to apply on v5.10.y-v6.6.y + ib_device_notify_register() not present in v5.10.y-v6.6.y, + so directly added lock for kobject_uevent() ] +Signed-off-by: Ajay Kaher +Signed-off-by: Shivani Agarwal +Signed-off-by: Greg Kroah-Hartman +--- + drivers/infiniband/core/device.c | 5 +++++ + 1 file changed, 5 insertions(+) + +--- a/drivers/infiniband/core/device.c ++++ b/drivers/infiniband/core/device.c +@@ -1396,8 +1396,13 @@ int ib_register_device(struct ib_device + return ret; + } + dev_set_uevent_suppress(&device->dev, false); ++ ++ down_read(&devices_rwsem); ++ + /* Mark for userspace that device is ready */ + kobject_uevent(&device->dev.kobj, KOBJ_ADD); ++ ++ up_read(&devices_rwsem); + ib_device_put(device); + + return 0; diff --git a/queue-5.10/series b/queue-5.10/series index 578122bde1..e77a075235 100644 --- a/queue-5.10/series +++ b/queue-5.10/series @@ -335,3 +335,4 @@ net-nfc-fix-deadlock-between-nfc_unregister_device-and-rfkill_fop_write.patch net-macb-relocate-mog_init_rings-callback-from-macb_mac_link_up-to-macb_open.patch drm-msm-a6xx-fix-out-of-bound-io-access-in-a6xx_get_gmu_registers.patch drm-nouveau-dispnv50-don-t-call-drm_atomic_get_crtc_state-in-prepare_fb.patch +rdma-core-fix-kasan-slab-use-after-free-read-in-ib_register_device-problem.patch