Correct the read/write permissions. - #239
Open
superboy0712 wants to merge 1 commit into
Open
superboy0712 wants to merge 1 commit into
superboy0712 wants to merge 1 commit into
Conversation
Not necessary to grant the files exe permissions.
superboy0712
commented
Oct 9, 2016
superboy0712
left a comment
superboy0712
left a comment
Author
There was a problem hiding this comment.
Here I make it only write accessible by root as convention. If this is not what you intended you may change it to
DEVICE_ATTR(enable, S_IRUGO | S_IWUGO, show_enable, set_enable); or something else. But anyway there are no reasons to give them execute permission.
| static ssize_t set_enable (struct device *dev, struct device_attribute *attr, const char *buf, size_t count); | ||
| static DEVICE_ATTR(enable, S_IRWXUGO, show_enable, set_enable); | ||
| static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, show_enable, set_enable); | ||
|
|
Author
There was a problem hiding this comment.
Here I make it only write accessible by root as convention. If this is not what you intended you may change it to
DEVICE_ATTR(enable, S_IRUGO | S_IWUGO, show_enable, set_enable); or something else. But anyway there are no reasons to give them execute permission.
mdrjr
pushed a commit
that referenced
this pull request
Oct 23, 2018
[ Upstream commit 3795214 ] Fixes the following splat during boot: BUG: sleeping function called from invalid context at kernel/locking/mutex.c:747 in_atomic(): 1, irqs_disabled(): 128, pid: 77, name: kworker/2:1 4 locks held by kworker/2:1/77: #0: (ptrval) ((wq_completion)"events"){+.+.}, at: process_one_work+0x1fc/0x8fc #1: (ptrval) (deferred_probe_work){+.+.}, at: process_one_work+0x1fc/0x8fc #2: (ptrval) (&dev->mutex){....}, at: __device_attach+0x40/0x178 #3: (ptrval) (msm_iommu_lock){....}, at: msm_iommu_add_device+0x28/0xcc irq event stamp: 348 hardirqs last enabled at (347): [<c049dc18>] kfree+0xe0/0x3c0 hardirqs last disabled at (348): [<c0c35cac>] _raw_spin_lock_irqsave+0x2c/0x68 softirqs last enabled at (0): [<c0322fd8>] copy_process.part.5+0x280/0x1a68 softirqs last disabled at (0): [<00000000>] (null) Preemption disabled at: [<00000000>] (null) CPU: 2 PID: 77 Comm: kworker/2:1 Not tainted 4.17.0-rc5-wt-ath-01075-gaca0516bb4cf #239 Hardware name: Generic DT based system Workqueue: events deferred_probe_work_func [<c0314e00>] (unwind_backtrace) from [<c030fc70>] (show_stack+0x20/0x24) [<c030fc70>] (show_stack) from [<c0c16ad8>] (dump_stack+0xa0/0xcc) [<c0c16ad8>] (dump_stack) from [<c035a978>] (___might_sleep+0x1f8/0x2d4) ath10k_sdio mmc2:0001:1: Direct firmware load for ath10k/QCA9377/hw1.0/board-2.bin failed with error -2 [<c035a978>] (___might_sleep) from [<c035aac4>] (__might_sleep+0x70/0xa8) [<c035aac4>] (__might_sleep) from [<c0c3066c>] (__mutex_lock+0x50/0xb28) [<c0c3066c>] (__mutex_lock) from [<c0c31170>] (mutex_lock_nested+0x2c/0x34) ath10k_sdio mmc2:0001:1: board_file api 1 bmi_id N/A crc32 544289f7 [<c0c31170>] (mutex_lock_nested) from [<c052d798>] (kernfs_find_and_get_ns+0x30/0x5c) [<c052d798>] (kernfs_find_and_get_ns) from [<c0531cc8>] (sysfs_add_link_to_group+0x28/0x58) [<c0531cc8>] (sysfs_add_link_to_group) from [<c07ef75c>] (iommu_device_link+0x50/0xb4) [<c07ef75c>] (iommu_device_link) from [<c07f2288>] (msm_iommu_add_device+0xa0/0xcc) [<c07f2288>] (msm_iommu_add_device) from [<c07ec6d0>] (add_iommu_group+0x3c/0x64) [<c07ec6d0>] (add_iommu_group) from [<c07f9d40>] (bus_for_each_dev+0x84/0xc4) [<c07f9d40>] (bus_for_each_dev) from [<c07ec7c8>] (bus_set_iommu+0xd0/0x10c) [<c07ec7c8>] (bus_set_iommu) from [<c07f1a68>] (msm_iommu_probe+0x5b8/0x66c) [<c07f1a68>] (msm_iommu_probe) from [<c07feaa8>] (platform_drv_probe+0x60/0xbc) [<c07feaa8>] (platform_drv_probe) from [<c07fc1fc>] (driver_probe_device+0x30c/0x4cc) [<c07fc1fc>] (driver_probe_device) from [<c07fc59c>] (__device_attach_driver+0xac/0x14c) [<c07fc59c>] (__device_attach_driver) from [<c07f9e14>] (bus_for_each_drv+0x68/0xc8) [<c07f9e14>] (bus_for_each_drv) from [<c07fbd3c>] (__device_attach+0xe4/0x178) [<c07fbd3c>] (__device_attach) from [<c07fc698>] (device_initial_probe+0x1c/0x20) [<c07fc698>] (device_initial_probe) from [<c07faee8>] (bus_probe_device+0x98/0xa0) [<c07faee8>] (bus_probe_device) from [<c07fb4f4>] (deferred_probe_work_func+0x74/0x198) [<c07fb4f4>] (deferred_probe_work_func) from [<c0348eb4>] (process_one_work+0x2c4/0x8fc) [<c0348eb4>] (process_one_work) from [<c03497b0>] (worker_thread+0x2c4/0x5cc) [<c03497b0>] (worker_thread) from [<c0350d10>] (kthread+0x180/0x188) [<c0350d10>] (kthread) from [<c03010b4>] (ret_from_fork+0x14/0x20) Fixes: 42df43b ("iommu/msm: Make use of iommu_device_register interface") Signed-off-by: Niklas Cassel <niklas.cassel@linaro.org> Reviewed-by: Vivek Gautam <vivek.gautam@codeaurora.org> Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
codewalkerster
pushed a commit
that referenced
this pull request
Sep 16, 2026
…o strict [ Upstream commit b1e125a ] Whenever a user issues an ets qdisc change command, transforming a drr class into a strict one, the ets code isn't checking whether that class was in the active list and removing it. This means that, if a user changes a strict class (which was in the active list) back to a drr one, that class will be added twice to the active list [1]. Doing so with the following commands: tc qdisc add dev lo root handle 1: ets bands 2 strict 1 tc qdisc add dev lo parent 1:2 handle 20: \ tbf rate 8bit burst 100b latency 1s tc filter add dev lo parent 1: basic classid 1:2 ping -c1 -W0.01 -s 56 127.0.0.1 tc qdisc change dev lo root handle 1: ets bands 2 strict 2 tc qdisc change dev lo root handle 1: ets bands 2 strict 1 ping -c1 -W0.01 -s 56 127.0.0.1 Will trigger the following splat with list debug turned on: [ 59.279014][ T365] ------------[ cut here ]------------ [ 59.279452][ T365] list_add double add: new=ffff88801d60e350, prev=ffff88801d60e350, next=ffff88801d60e2c0. [ 59.280153][ T365] WARNING: CPU: 3 PID: 365 at lib/list_debug.c:35 __list_add_valid_or_report+0x17f/0x220 [ 59.280860][ T365] Modules linked in: [ 59.281165][ T365] CPU: 3 UID: 0 PID: 365 Comm: tc Not tainted 6.18.0-rc7-00105-g7e9f13163c13-dirty #239 PREEMPT(voluntary) [ 59.281977][ T365] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 59.282391][ T365] RIP: 0010:__list_add_valid_or_report+0x17f/0x220 [ 59.282842][ T365] Code: 89 c6 e8 d4 b7 0d ff 90 0f 0b 90 90 31 c0 e9 31 ff ff ff 90 48 c7 c7 e0 a0 22 9f 48 89 f2 48 89 c1 4c 89 c6 e8 b2 b7 0d ff 90 <0f> 0b 90 90 31 c0 e9 0f ff ff ff 48 89 f7 48 89 44 24 10 4c 89 44 ... [ 59.288812][ T365] Call Trace: [ 59.289056][ T365] <TASK> [ 59.289224][ T365] ? srso_alias_return_thunk+0x5/0xfbef5 [ 59.289546][ T365] ets_qdisc_change+0xd2b/0x1e80 [ 59.289891][ T365] ? __lock_acquire+0x7e7/0x1be0 [ 59.290223][ T365] ? __pfx_ets_qdisc_change+0x10/0x10 [ 59.290546][ T365] ? srso_alias_return_thunk+0x5/0xfbef5 [ 59.290898][ T365] ? __mutex_trylock_common+0xda/0x240 [ 59.291228][ T365] ? __pfx___mutex_trylock_common+0x10/0x10 [ 59.291655][ T365] ? srso_alias_return_thunk+0x5/0xfbef5 [ 59.291993][ T365] ? srso_alias_return_thunk+0x5/0xfbef5 [ 59.292313][ T365] ? trace_contention_end+0xc8/0x110 [ 59.292656][ T365] ? srso_alias_return_thunk+0x5/0xfbef5 [ 59.293022][ T365] ? srso_alias_return_thunk+0x5/0xfbef5 [ 59.293351][ T365] tc_modify_qdisc+0x63a/0x1cf0 Fix this by always checking and removing an ets class from the active list when changing it to strict. [1] https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/tree/net/sched/sch_ets.c?id=ce052b9402e461a9aded599f5b47e76bc727f7de#n663 Fixes: cd9b50a ("net/sched: ets: fix crash when flipping from 'strict' to 'quantum'") Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Victor Nogueira <victor@mojatatu.com> Reviewed-by: Petr Machata <petrm@nvidia.com> Link: https://patch.msgid.link/20251208190125.1868423-1-victor@mojatatu.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Not necessary to grant the files exe permissions.