user/sven/linux.git, branch v4.14.332

Linux 4.14.332

2023-12-08T07:42:00Z

Link: https://lore.kernel.org/r/20231205031511.476698159@linuxfoundation.org Tested-by: Harshit Mogalapalli Tested-by: Pavel Machek (CIP) Tested-by: Jon Hunter Tested-by: Linux Kernel Functional Testing Tested-by: Guenter Roeck Signed-off-by: Greg Kroah-Hartman

driver core: Release all resources during unbind before updating device links

2023-12-08T07:42:00Z

commit 2e84dc37920012b458e9458b19fc4ed33f81bc74 upstream. This commit fixes a bug in commit 9ed9895370ae ("driver core: Functional dependencies tracking support") where the device link status was incorrectly updated in the driver unbind path before all the device's resources were released. Fixes: 9ed9895370ae ("driver core: Functional dependencies tracking support") Cc: stable Reported-by: Uwe Kleine-König Closes: https://lore.kernel.org/all/20231014161721.f4iqyroddkcyoefo@pengutronix.de/ Signed-off-by: Saravana Kannan Cc: Thierry Reding Cc: Yang Yingliang Cc: Andy Shevchenko Cc: Mark Brown Cc: Matti Vaittinen Cc: James Clark Acked-by: "Rafael J. Wysocki" Tested-by: Uwe Kleine-König Acked-by: Uwe Kleine-König Link: https://lore.kernel.org/r/20231018013851.3303928-1-saravanak@google.com Signed-off-by: Uwe Kleine-König Signed-off-by: Greg Kroah-Hartman

net: ravb: Start TX queues after HW initialization succeeded

2023-12-08T07:42:00Z

[ Upstream commit 6f32c086602050fc11157adeafaa1c1eb393f0af ] ravb_phy_start() may fail. If that happens, the TX queues will remain started. Thus, move the netif_tx_start_all_queues() after PHY is successfully initialized. Fixes: c156633f1353 ("Renesas Ethernet AVB driver proper") Reviewed-by: Sergey Shtylyov Signed-off-by: Claudiu Beznea Reviewed-by: Kalesh AP Signed-off-by: Paolo Abeni Signed-off-by: Sasha Levin

ravb: Fix races between ravb_tx_timeout_work() and net related ops

2023-12-08T07:42:00Z

[ Upstream commit 9870257a0a338cd8d6c1cddab74e703f490f6779 ] Fix races between ravb_tx_timeout_work() and functions of net_device_ops and ethtool_ops by using rtnl_trylock() and rtnl_unlock(). Note that since ravb_close() is under the rtnl lock and calls cancel_work_sync(), ravb_tx_timeout_work() should calls rtnl_trylock(). Otherwise, a deadlock may happen in ravb_tx_timeout_work() like below: CPU0 CPU1 ravb_tx_timeout() schedule_work() ... __dev_close_many() // Under rtnl lock ravb_close() cancel_work_sync() // Waiting ravb_tx_timeout_work() rtnl_lock() // This is possible to cause a deadlock If rtnl_trylock() fails, rescheduling the work with sleep for 1 msec. Fixes: c156633f1353 ("Renesas Ethernet AVB driver proper") Signed-off-by: Yoshihiro Shimoda Reviewed-by: Sergey Shtylyov Link: https://lore.kernel.org/r/20231127122420.3706751-1-yoshihiro.shimoda.uh@renesas.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin

ipv4: igmp: fix refcnt uaf issue when receiving igmp query packet

2023-12-08T07:42:00Z

[ Upstream commit e2b706c691905fe78468c361aaabc719d0a496f1 ] When I perform the following test operations: 1.ip link add br0 type bridge 2.brctl addif br0 eth0 3.ip addr add 239.0.0.1/32 dev eth0 4.ip addr add 239.0.0.1/32 dev br0 5.ip addr add 224.0.0.1/32 dev br0 6.while ((1)) do ifconfig br0 up ifconfig br0 down done 7.send IGMPv2 query packets to port eth0 continuously. For example, ./mausezahn ethX -c 0 "01 00 5e 00 00 01 00 72 19 88 aa 02 08 00 45 00 00 1c 00 01 00 00 01 02 0e 7f c0 a8 0a b7 e0 00 00 01 11 64 ee 9b 00 00 00 00" The preceding tests may trigger the refcnt uaf issue of the mc list. The stack is as follows: refcount_t: addition on 0; use-after-free. WARNING: CPU: 21 PID: 144 at lib/refcount.c:25 refcount_warn_saturate (lib/refcount.c:25) CPU: 21 PID: 144 Comm: ksoftirqd/21 Kdump: loaded Not tainted 6.7.0-rc1-next-20231117-dirty #80 Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011 RIP: 0010:refcount_warn_saturate (lib/refcount.c:25) RSP: 0018:ffffb68f00657910 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff8a00c3bf96c0 RCX: ffff8a07b6160908 RDX: 00000000ffffffd8 RSI: 0000000000000027 RDI: ffff8a07b6160900 RBP: ffff8a00cba36862 R08: 0000000000000000 R09: 00000000ffff7fff R10: ffffb68f006577c0 R11: ffffffffb0fdcdc8 R12: ffff8a00c3bf9680 R13: ffff8a00c3bf96f0 R14: 0000000000000000 R15: ffff8a00d8766e00 FS: 0000000000000000(0000) GS:ffff8a07b6140000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f10b520b28 CR3: 000000039741a000 CR4: 00000000000006f0 Call Trace: igmp_heard_query (net/ipv4/igmp.c:1068) igmp_rcv (net/ipv4/igmp.c:1132) ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205) ip_local_deliver_finish (net/ipv4/ip_input.c:234) __netif_receive_skb_one_core (net/core/dev.c:5529) netif_receive_skb_internal (net/core/dev.c:5729) netif_receive_skb (net/core/dev.c:5788) br_handle_frame_finish (net/bridge/br_input.c:216) nf_hook_bridge_pre (net/bridge/br_input.c:294) __netif_receive_skb_core (net/core/dev.c:5423) __netif_receive_skb_list_core (net/core/dev.c:5606) __netif_receive_skb_list (net/core/dev.c:5674) netif_receive_skb_list_internal (net/core/dev.c:5764) napi_gro_receive (net/core/gro.c:609) e1000_clean_rx_irq (drivers/net/ethernet/intel/e1000/e1000_main.c:4467) e1000_clean (drivers/net/ethernet/intel/e1000/e1000_main.c:3805) __napi_poll (net/core/dev.c:6533) net_rx_action (net/core/dev.c:6735) __do_softirq (kernel/softirq.c:554) run_ksoftirqd (kernel/softirq.c:913) smpboot_thread_fn (kernel/smpboot.c:164) kthread (kernel/kthread.c:388) ret_from_fork (arch/x86/kernel/process.c:153) ret_from_fork_asm (arch/x86/entry/entry_64.S:250) The root causes are as follows: Thread A Thread B ... netif_receive_skb br_dev_stop ... br_multicast_leave_snoopers ... __ip_mc_dec_group ... __igmp_group_dropped igmp_rcv igmp_stop_timer igmp_heard_query //ref = 1 ip_ma_put igmp_mod_timer refcount_dec_and_test igmp_start_timer //ref = 0 ... refcount_inc //ref increases from 0 When the device receives an IGMPv2 Query message, it starts the timer immediately, regardless of whether the device is running. If the device is down and has left the multicast group, it will cause the mc list refcount uaf issue. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Zhengchao Shao Reviewed-by: Eric Dumazet Reviewed-by: Hangbin Liu Signed-off-by: David S. Miller Signed-off-by: Sasha Levin

btrfs: send: ensure send_fd is writable

2023-12-08T07:42:00Z

commit 0ac1d13a55eb37d398b63e6ff6db4a09a2c9128c upstream. kernel_write() requires the caller to ensure that the file is writable. Let's do that directly after looking up the ->send_fd. We don't need a separate bailout path because the "out" path already does fput() if ->send_filp is non-NULL. This has no security impact for two reasons: - the ioctl requires CAP_SYS_ADMIN - __kernel_write() bails out on read-only files - but only since 5.8, see commit a01ac27be472 ("fs: check FMODE_WRITE in __kernel_write") Reported-and-tested-by: syzbot+12e098239d20385264d3@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=12e098239d20385264d3 Fixes: 31db9f7c23fb ("Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive") CC: stable@vger.kernel.org # 4.14+ Signed-off-by: Jann Horn Reviewed-by: David Sterba Signed-off-by: David Sterba Signed-off-by: Greg Kroah-Hartman

btrfs: fix off-by-one when checking chunk map includes logical address

2023-12-08T07:42:00Z

commit 5fba5a571858ce2d787fdaf55814e42725bfa895 upstream. At btrfs_get_chunk_map() we get the extent map for the chunk that contains the given logical address stored in the 'logical' argument. Then we do sanity checks to verify the extent map contains the logical address. One of these checks verifies if the extent map covers a range with an end offset behind the target logical address - however this check has an off-by-one error since it will consider an extent map whose start offset plus its length matches the target logical address as inclusive, while the fact is that the last byte it covers is behind the target logical address (by 1). So fix this condition by using '<=' rather than '<' when comparing the extent map's "start + length" against the target logical address. CC: stable@vger.kernel.org # 4.14+ Reviewed-by: Josef Bacik Signed-off-by: Filipe Manana Reviewed-by: David Sterba Signed-off-by: David Sterba Signed-off-by: Greg Kroah-Hartman

powerpc: Don't clobber f0/vs0 during fp|altivec register save

2023-12-08T07:42:00Z

commit 5e1d824f9a283cbf90f25241b66d1f69adb3835b upstream. During floating point and vector save to thread data f0/vs0 are clobbered by the FPSCR/VSCR store routine. This has been obvserved to lead to userspace register corruption and application data corruption with io-uring. Fix it by restoring f0/vs0 after FPSCR/VSCR store has completed for all the FP, altivec, VMX register save paths. Tested under QEMU in kvm mode, running on a Talos II workstation with dual POWER9 DD2.2 CPUs. Additional detail (mpe): Typically save_fpu() is called from __giveup_fpu() which saves the FP regs and also *turns off FP* in the tasks MSR, meaning the kernel will reload the FP regs from the thread struct before letting the task use FP again. So in that case save_fpu() is free to clobber f0 because the FP regs no longer hold live values for the task. There is another case though, which is the path via: sys_clone() ... copy_process() dup_task_struct() arch_dup_task_struct() flush_all_to_thread() save_all() That path saves the FP regs but leaves them live. That's meant as an optimisation for a process that's using FP/VSX and then calls fork(), leaving the regs live means the parent process doesn't have to take a fault after the fork to get its FP regs back. The optimisation was added in commit 8792468da5e1 ("powerpc: Add the ability to save FPU without giving it up"). That path does clobber f0, but f0 is volatile across function calls, and typically programs reach copy_process() from userspace via a syscall wrapper function. So in normal usage f0 being clobbered across a syscall doesn't cause visible data corruption. But there is now a new path, because io-uring can call copy_process() via create_io_thread() from the signal handling path. That's OK if the signal is handled as part of syscall return, but it's not OK if the signal is handled due to some other interrupt. That path is: interrupt_return_srr_user() interrupt_exit_user_prepare() interrupt_exit_user_prepare_main() do_notify_resume() get_signal() task_work_run() create_worker_cb() create_io_worker() copy_process() dup_task_struct() arch_dup_task_struct() flush_all_to_thread() save_all() if (tsk->thread.regs->msr & MSR_FP) save_fpu() # f0 is clobbered and potentially live in userspace Note the above discussion applies equally to save_altivec(). Fixes: 8792468da5e1 ("powerpc: Add the ability to save FPU without giving it up") Cc: stable@vger.kernel.org # v4.6+ Closes: https://lore.kernel.org/all/480932026.45576726.1699374859845.JavaMail.zimbra@raptorengineeringinc.com/ Closes: https://lore.kernel.org/linuxppc-dev/480221078.47953493.1700206777956.JavaMail.zimbra@raptorengineeringinc.com/ Tested-by: Timothy Pearson Tested-by: Jens Axboe Signed-off-by: Timothy Pearson [mpe: Reword change log to describe exact path of corruption & other minor tweaks] Signed-off-by: Michael Ellerman Link: https://msgid.link/1921539696.48534988.1700407082933.JavaMail.zimbra@raptorengineeringinc.com Signed-off-by: Greg Kroah-Hartman

dm verity: don't perform FEC for failed readahead IO

2023-12-08T07:42:00Z

commit 0193e3966ceeeef69e235975918b287ab093082b upstream. We found an issue under Android OTA scenario that many BIOs have to do FEC where the data under dm-verity is 100% complete and no corruption. Android OTA has many dm-block layers, from upper to lower: dm-verity dm-snapshot dm-origin & dm-cow dm-linear ufs DM tables have to change 2 times during Android OTA merging process. When doing table change, the dm-snapshot will be suspended for a while. During this interval, many readahead IOs are submitted to dm_verity from filesystem. Then the kverity works are busy doing FEC process which cost too much time to finish dm-verity IO. This causes needless delay which feels like system is hung. After adding debugging it was found that each readahead IO needed around 10s to finish when this situation occurred. This is due to IO amplification: dm-snapshot suspend erofs_readahead // 300+ io is submitted dm_submit_bio (dm_verity) dm_submit_bio (dm_snapshot) bio return EIO bio got nothing, it's empty verity_end_io verity_verify_io forloop range(0, io->n_blocks) // each io->nblocks ~= 20 verity_fec_decode fec_decode_rsb fec_read_bufs forloop range(0, v->fec->rsn) // v->fec->rsn = 253 new_read submit_bio (dm_snapshot) end loop end loop dm-snapshot resume Readahead BIOs get nothing while dm-snapshot is suspended, so all of them will cause verity's FEC. Each readahead BIO needs to verify ~20 (io->nblocks) blocks. Each block needs to do FEC, and every block needs to do 253 (v->fec->rsn) reads. So during the suspend interval(~200ms), 300 readahead BIOs trigger ~1518000 (300*20*253) IOs to dm-snapshot. As readahead IO is not required by userspace, and to fix this issue, it is best to pass readahead errors to upper layer to handle it. Cc: stable@vger.kernel.org Fixes: a739ff3f543a ("dm verity: add support for forward error correction") Signed-off-by: Wu Bo Reviewed-by: Mikulas Patocka Signed-off-by: Mike Snitzer Signed-off-by: Greg Kroah-Hartman

dm-verity: align struct dm_verity_fec_io properly

2023-12-08T07:42:00Z

commit 38bc1ab135db87577695816b190e7d6d8ec75879 upstream. dm_verity_fec_io is placed after the end of two hash digests. If the hash digest has unaligned length, struct dm_verity_fec_io could be unaligned. This commit fixes the placement of struct dm_verity_fec_io, so that it's aligned. Signed-off-by: Mikulas Patocka Cc: stable@vger.kernel.org Fixes: a739ff3f543a ("dm verity: add support for forward error correction") Signed-off-by: Mike Snitzer Signed-off-by: Greg Kroah-Hartman