From: Greg Kroah-Hartman Date: Mon, 21 Jun 2021 15:33:43 +0000 (+0200) Subject: 4.9-stable patches X-Git-Tag: v5.4.128~12 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=0ca9199e79bf893cb5c7cdb406ac3282c2ff18cf;p=thirdparty%2Fkernel%2Fstable-queue.git 4.9-stable patches added patches: can-bcm-raw-isotp-use-per-module-netdevice-notifier.patch usb-dwc3-core-fix-kernel-panic-when-do-reboot.patch --- diff --git a/queue-4.9/can-bcm-raw-isotp-use-per-module-netdevice-notifier.patch b/queue-4.9/can-bcm-raw-isotp-use-per-module-netdevice-notifier.patch new file mode 100644 index 00000000000..f715376fc3f --- /dev/null +++ b/queue-4.9/can-bcm-raw-isotp-use-per-module-netdevice-notifier.patch @@ -0,0 +1,303 @@ +From 8d0caedb759683041d9db82069937525999ada53 Mon Sep 17 00:00:00 2001 +From: Tetsuo Handa +Date: Sat, 5 Jun 2021 19:26:35 +0900 +Subject: can: bcm/raw/isotp: use per module netdevice notifier + +From: Tetsuo Handa + +commit 8d0caedb759683041d9db82069937525999ada53 upstream. + +syzbot is reporting hung task at register_netdevice_notifier() [1] and +unregister_netdevice_notifier() [2], for cleanup_net() might perform +time consuming operations while CAN driver's raw/bcm/isotp modules are +calling {register,unregister}_netdevice_notifier() on each socket. + +Change raw/bcm/isotp modules to call register_netdevice_notifier() from +module's __init function and call unregister_netdevice_notifier() from +module's __exit function, as with gw/j1939 modules are doing. + +Link: https://syzkaller.appspot.com/bug?id=391b9498827788b3cc6830226d4ff5be87107c30 [1] +Link: https://syzkaller.appspot.com/bug?id=1724d278c83ca6e6df100a2e320c10d991cf2bce [2] +Link: https://lore.kernel.org/r/54a5f451-05ed-f977-8534-79e7aa2bcc8f@i-love.sakura.ne.jp +Cc: linux-stable +Reported-by: syzbot +Reported-by: syzbot +Reviewed-by: Kirill Tkhai +Tested-by: syzbot +Tested-by: Oliver Hartkopp +Signed-off-by: Tetsuo Handa +Signed-off-by: Marc Kleine-Budde +Signed-off-by: Greg Kroah-Hartman + +--- + net/can/bcm.c | 61 ++++++++++++++++++++++++++++++++++++++++++++------------- + net/can/raw.c | 62 ++++++++++++++++++++++++++++++++++++++++++++-------------- + 2 files changed, 96 insertions(+), 27 deletions(-) + +--- a/net/can/bcm.c ++++ b/net/can/bcm.c +@@ -127,7 +127,7 @@ struct bcm_sock { + struct sock sk; + int bound; + int ifindex; +- struct notifier_block notifier; ++ struct list_head notifier; + struct list_head rx_ops; + struct list_head tx_ops; + unsigned long dropped_usr_msgs; +@@ -135,6 +135,10 @@ struct bcm_sock { + char procname [32]; /* inode number in decimal with \0 */ + }; + ++static LIST_HEAD(bcm_notifier_list); ++static DEFINE_SPINLOCK(bcm_notifier_lock); ++static struct bcm_sock *bcm_busy_notifier; ++ + static inline struct bcm_sock *bcm_sk(const struct sock *sk) + { + return (struct bcm_sock *)sk; +@@ -1439,20 +1443,15 @@ static int bcm_sendmsg(struct socket *so + /* + * notification handler for netdevice status changes + */ +-static int bcm_notifier(struct notifier_block *nb, unsigned long msg, +- void *ptr) ++static void bcm_notify(struct bcm_sock *bo, unsigned long msg, ++ struct net_device *dev) + { +- struct net_device *dev = netdev_notifier_info_to_dev(ptr); +- struct bcm_sock *bo = container_of(nb, struct bcm_sock, notifier); + struct sock *sk = &bo->sk; + struct bcm_op *op; + int notify_enodev = 0; + + if (!net_eq(dev_net(dev), &init_net)) +- return NOTIFY_DONE; +- +- if (dev->type != ARPHRD_CAN) +- return NOTIFY_DONE; ++ return; + + switch (msg) { + +@@ -1487,7 +1486,28 @@ static int bcm_notifier(struct notifier_ + sk->sk_error_report(sk); + } + } ++} + ++static int bcm_notifier(struct notifier_block *nb, unsigned long msg, ++ void *ptr) ++{ ++ struct net_device *dev = netdev_notifier_info_to_dev(ptr); ++ ++ if (dev->type != ARPHRD_CAN) ++ return NOTIFY_DONE; ++ if (msg != NETDEV_UNREGISTER && msg != NETDEV_DOWN) ++ return NOTIFY_DONE; ++ if (unlikely(bcm_busy_notifier)) /* Check for reentrant bug. */ ++ return NOTIFY_DONE; ++ ++ spin_lock(&bcm_notifier_lock); ++ list_for_each_entry(bcm_busy_notifier, &bcm_notifier_list, notifier) { ++ spin_unlock(&bcm_notifier_lock); ++ bcm_notify(bcm_busy_notifier, msg, dev); ++ spin_lock(&bcm_notifier_lock); ++ } ++ bcm_busy_notifier = NULL; ++ spin_unlock(&bcm_notifier_lock); + return NOTIFY_DONE; + } + +@@ -1507,9 +1527,9 @@ static int bcm_init(struct sock *sk) + INIT_LIST_HEAD(&bo->rx_ops); + + /* set notifier */ +- bo->notifier.notifier_call = bcm_notifier; +- +- register_netdevice_notifier(&bo->notifier); ++ spin_lock(&bcm_notifier_lock); ++ list_add_tail(&bo->notifier, &bcm_notifier_list); ++ spin_unlock(&bcm_notifier_lock); + + return 0; + } +@@ -1530,7 +1550,14 @@ static int bcm_release(struct socket *so + + /* remove bcm_ops, timer, rx_unregister(), etc. */ + +- unregister_netdevice_notifier(&bo->notifier); ++ spin_lock(&bcm_notifier_lock); ++ while (bcm_busy_notifier == bo) { ++ spin_unlock(&bcm_notifier_lock); ++ schedule_timeout_uninterruptible(1); ++ spin_lock(&bcm_notifier_lock); ++ } ++ list_del(&bo->notifier); ++ spin_unlock(&bcm_notifier_lock); + + lock_sock(sk); + +@@ -1716,6 +1743,10 @@ static const struct can_proto bcm_can_pr + .prot = &bcm_proto, + }; + ++static struct notifier_block canbcm_notifier = { ++ .notifier_call = bcm_notifier ++}; ++ + static int __init bcm_module_init(void) + { + int err; +@@ -1730,6 +1761,8 @@ static int __init bcm_module_init(void) + + /* create /proc/net/can-bcm directory */ + proc_dir = proc_mkdir("can-bcm", init_net.proc_net); ++ register_netdevice_notifier(&canbcm_notifier); ++ + return 0; + } + +@@ -1739,6 +1772,8 @@ static void __exit bcm_module_exit(void) + + if (proc_dir) + remove_proc_entry("can-bcm", init_net.proc_net); ++ ++ unregister_netdevice_notifier(&canbcm_notifier); + } + + module_init(bcm_module_init); +--- a/net/can/raw.c ++++ b/net/can/raw.c +@@ -84,7 +84,7 @@ struct raw_sock { + struct sock sk; + int bound; + int ifindex; +- struct notifier_block notifier; ++ struct list_head notifier; + int loopback; + int recv_own_msgs; + int fd_frames; +@@ -96,6 +96,10 @@ struct raw_sock { + struct uniqframe __percpu *uniq; + }; + ++static LIST_HEAD(raw_notifier_list); ++static DEFINE_SPINLOCK(raw_notifier_lock); ++static struct raw_sock *raw_busy_notifier; ++ + /* + * Return pointer to store the extra msg flags for raw_recvmsg(). + * We use the space of one unsigned int beyond the 'struct sockaddr_can' +@@ -260,21 +264,16 @@ static int raw_enable_allfilters(struct + return err; + } + +-static int raw_notifier(struct notifier_block *nb, +- unsigned long msg, void *ptr) ++static void raw_notify(struct raw_sock *ro, unsigned long msg, ++ struct net_device *dev) + { +- struct net_device *dev = netdev_notifier_info_to_dev(ptr); +- struct raw_sock *ro = container_of(nb, struct raw_sock, notifier); + struct sock *sk = &ro->sk; + + if (!net_eq(dev_net(dev), &init_net)) +- return NOTIFY_DONE; +- +- if (dev->type != ARPHRD_CAN) +- return NOTIFY_DONE; ++ return; + + if (ro->ifindex != dev->ifindex) +- return NOTIFY_DONE; ++ return; + + switch (msg) { + +@@ -303,7 +302,28 @@ static int raw_notifier(struct notifier_ + sk->sk_error_report(sk); + break; + } ++} ++ ++static int raw_notifier(struct notifier_block *nb, unsigned long msg, ++ void *ptr) ++{ ++ struct net_device *dev = netdev_notifier_info_to_dev(ptr); ++ ++ if (dev->type != ARPHRD_CAN) ++ return NOTIFY_DONE; ++ if (msg != NETDEV_UNREGISTER && msg != NETDEV_DOWN) ++ return NOTIFY_DONE; ++ if (unlikely(raw_busy_notifier)) /* Check for reentrant bug. */ ++ return NOTIFY_DONE; + ++ spin_lock(&raw_notifier_lock); ++ list_for_each_entry(raw_busy_notifier, &raw_notifier_list, notifier) { ++ spin_unlock(&raw_notifier_lock); ++ raw_notify(raw_busy_notifier, msg, dev); ++ spin_lock(&raw_notifier_lock); ++ } ++ raw_busy_notifier = NULL; ++ spin_unlock(&raw_notifier_lock); + return NOTIFY_DONE; + } + +@@ -332,9 +352,9 @@ static int raw_init(struct sock *sk) + return -ENOMEM; + + /* set notifier */ +- ro->notifier.notifier_call = raw_notifier; +- +- register_netdevice_notifier(&ro->notifier); ++ spin_lock(&raw_notifier_lock); ++ list_add_tail(&ro->notifier, &raw_notifier_list); ++ spin_unlock(&raw_notifier_lock); + + return 0; + } +@@ -349,7 +369,14 @@ static int raw_release(struct socket *so + + ro = raw_sk(sk); + +- unregister_netdevice_notifier(&ro->notifier); ++ spin_lock(&raw_notifier_lock); ++ while (raw_busy_notifier == ro) { ++ spin_unlock(&raw_notifier_lock); ++ schedule_timeout_uninterruptible(1); ++ spin_lock(&raw_notifier_lock); ++ } ++ list_del(&ro->notifier); ++ spin_unlock(&raw_notifier_lock); + + lock_sock(sk); + +@@ -857,6 +884,10 @@ static const struct can_proto raw_can_pr + .prot = &raw_proto, + }; + ++static struct notifier_block canraw_notifier = { ++ .notifier_call = raw_notifier ++}; ++ + static __init int raw_module_init(void) + { + int err; +@@ -866,6 +897,8 @@ static __init int raw_module_init(void) + err = can_proto_register(&raw_can_proto); + if (err < 0) + printk(KERN_ERR "can: registration of raw protocol failed\n"); ++ else ++ register_netdevice_notifier(&canraw_notifier); + + return err; + } +@@ -873,6 +906,7 @@ static __init int raw_module_init(void) + static __exit void raw_module_exit(void) + { + can_proto_unregister(&raw_can_proto); ++ unregister_netdevice_notifier(&canraw_notifier); + } + + module_init(raw_module_init); diff --git a/queue-4.9/series b/queue-4.9/series index 7c811606067..0ce26ae467e 100644 --- a/queue-4.9/series +++ b/queue-4.9/series @@ -42,3 +42,5 @@ pci-mark-some-nvidia-gpus-to-avoid-bus-reset.patch arcv2-save-abi-registers-across-signal-handling.patch dmaengine-pl330-fix-wrong-usage-of-spinlock-flags-in-dma_cyclc.patch net-fec_ptp-add-clock-rate-zero-check.patch +can-bcm-raw-isotp-use-per-module-netdevice-notifier.patch +usb-dwc3-core-fix-kernel-panic-when-do-reboot.patch diff --git a/queue-4.9/usb-dwc3-core-fix-kernel-panic-when-do-reboot.patch b/queue-4.9/usb-dwc3-core-fix-kernel-panic-when-do-reboot.patch new file mode 100644 index 00000000000..ac93d5d3f52 --- /dev/null +++ b/queue-4.9/usb-dwc3-core-fix-kernel-panic-when-do-reboot.patch @@ -0,0 +1,86 @@ +From 4bf584a03eec674975ee9fe36c8583d9d470dab1 Mon Sep 17 00:00:00 2001 +From: Peter Chen +Date: Tue, 8 Jun 2021 18:56:56 +0800 +Subject: usb: dwc3: core: fix kernel panic when do reboot + +From: Peter Chen + +commit 4bf584a03eec674975ee9fe36c8583d9d470dab1 upstream. + +When do system reboot, it calls dwc3_shutdown and the whole debugfs +for dwc3 has removed first, when the gadget tries to do deinit, and +remove debugfs for its endpoints, it meets NULL pointer dereference +issue when call debugfs_lookup. Fix it by removing the whole dwc3 +debugfs later than dwc3_drd_exit. + +[ 2924.958838] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000002 +.... +[ 2925.030994] pstate: 60000005 (nZCv daif -PAN -UAO -TCO BTYPE=--) +[ 2925.037005] pc : inode_permission+0x2c/0x198 +[ 2925.041281] lr : lookup_one_len_common+0xb0/0xf8 +[ 2925.045903] sp : ffff80001276ba70 +[ 2925.049218] x29: ffff80001276ba70 x28: ffff0000c01f0000 x27: 0000000000000000 +[ 2925.056364] x26: ffff800011791e70 x25: 0000000000000008 x24: dead000000000100 +[ 2925.063510] x23: dead000000000122 x22: 0000000000000000 x21: 0000000000000001 +[ 2925.070652] x20: ffff8000122c6188 x19: 0000000000000000 x18: 0000000000000000 +[ 2925.077797] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000004 +[ 2925.084943] x14: ffffffffffffffff x13: 0000000000000000 x12: 0000000000000030 +[ 2925.092087] x11: 0101010101010101 x10: 7f7f7f7f7f7f7f7f x9 : ffff8000102b2420 +[ 2925.099232] x8 : 7f7f7f7f7f7f7f7f x7 : feff73746e2f6f64 x6 : 0000000000008080 +[ 2925.106378] x5 : 61c8864680b583eb x4 : 209e6ec2d263dbb7 x3 : 000074756f307065 +[ 2925.113523] x2 : 0000000000000001 x1 : 0000000000000000 x0 : ffff8000122c6188 +[ 2925.120671] Call trace: +[ 2925.123119] inode_permission+0x2c/0x198 +[ 2925.127042] lookup_one_len_common+0xb0/0xf8 +[ 2925.131315] lookup_one_len_unlocked+0x34/0xb0 +[ 2925.135764] lookup_positive_unlocked+0x14/0x50 +[ 2925.140296] debugfs_lookup+0x68/0xa0 +[ 2925.143964] dwc3_gadget_free_endpoints+0x84/0xb0 +[ 2925.148675] dwc3_gadget_exit+0x28/0x78 +[ 2925.152518] dwc3_drd_exit+0x100/0x1f8 +[ 2925.156267] dwc3_remove+0x11c/0x120 +[ 2925.159851] dwc3_shutdown+0x14/0x20 +[ 2925.163432] platform_shutdown+0x28/0x38 +[ 2925.167360] device_shutdown+0x15c/0x378 +[ 2925.171291] kernel_restart_prepare+0x3c/0x48 +[ 2925.175650] kernel_restart+0x1c/0x68 +[ 2925.179316] __do_sys_reboot+0x218/0x240 +[ 2925.183247] __arm64_sys_reboot+0x28/0x30 +[ 2925.187262] invoke_syscall+0x48/0x100 +[ 2925.191017] el0_svc_common.constprop.0+0x48/0xc8 +[ 2925.195726] do_el0_svc+0x28/0x88 +[ 2925.199045] el0_svc+0x20/0x30 +[ 2925.202104] el0_sync_handler+0xa8/0xb0 +[ 2925.205942] el0_sync+0x148/0x180 +[ 2925.209270] Code: a9025bf5 2a0203f5 121f0056 370802b5 (79400660) +[ 2925.215372] ---[ end trace 124254d8e485a58b ]--- +[ 2925.220012] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b +[ 2925.227676] Kernel Offset: disabled +[ 2925.231164] CPU features: 0x00001001,20000846 +[ 2925.235521] Memory Limit: none +[ 2925.238580] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b ]--- + +Fixes: 8d396bb0a5b6 ("usb: dwc3: debugfs: Add and remove endpoint dirs dynamically") +Cc: Jack Pham +Tested-by: Jack Pham +Signed-off-by: Peter Chen +Link: https://lore.kernel.org/r/20210608105656.10795-1-peter.chen@kernel.org +(cherry picked from commit 2a042767814bd0edf2619f06fecd374e266ea068) +Link: https://lore.kernel.org/r/20210615080847.GA10432@jackp-linux.qualcomm.com +Signed-off-by: Greg Kroah-Hartman +--- + drivers/usb/dwc3/core.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +--- a/drivers/usb/dwc3/core.c ++++ b/drivers/usb/dwc3/core.c +@@ -1199,8 +1199,8 @@ static int dwc3_remove(struct platform_d + */ + res->start -= DWC3_GLOBALS_REGS_START; + +- dwc3_debugfs_exit(dwc); + dwc3_core_exit_mode(dwc); ++ dwc3_debugfs_exit(dwc); + + dwc3_core_exit(dwc); + dwc3_ulpi_exit(dwc);