1. 07 Feb, 2024 3 commits
  2. 04 Feb, 2024 2 commits
  3. 03 Feb, 2024 10 commits
  4. 02 Feb, 2024 3 commits
    • Eric Dumazet's avatar
      netdevsim: avoid potential loop in nsim_dev_trap_report_work() · ba5e1272
      Eric Dumazet authored
      Many syzbot reports include the following trace [1]
      
      If nsim_dev_trap_report_work() can not grab the mutex,
      it should rearm itself at least one jiffie later.
      
      [1]
      Sending NMI from CPU 1 to CPUs 0:
      NMI backtrace for cpu 0
      CPU: 0 PID: 32383 Comm: kworker/0:2 Not tainted 6.8.0-rc2-syzkaller-00031-g861c0981 #0
      Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
      Workqueue: events nsim_dev_trap_report_work
       RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:89 [inline]
       RIP: 0010:memory_is_nonzero mm/kasan/generic.c:104 [inline]
       RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline]
       RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline]
       RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
       RIP: 0010:kasan_check_range+0x101/0x190 mm/kasan/generic.c:189
      Code: 07 49 39 d1 75 0a 45 3a 11 b8 01 00 00 00 7c 0b 44 89 c2 e8 21 ed ff ff 83 f0 01 5b 5d 41 5c c3 48 85 d2 74 4f 48 01 ea eb 09 <48> 83 c0 01 48 39 d0 74 41 80 38 00 74 f2 eb b6 41 bc 08 00 00 00
      RSP: 0018:ffffc90012dcf998 EFLAGS: 00000046
      RAX: fffffbfff258af1e RBX: fffffbfff258af1f RCX: ffffffff8168eda3
      RDX: fffffbfff258af1f RSI: 0000000000000004 RDI: ffffffff92c578f0
      RBP: fffffbfff258af1e R08: 0000000000000000 R09: fffffbfff258af1e
      R10: ffffffff92c578f3 R11: ffffffff8acbcbc0 R12: 0000000000000002
      R13: ffff88806db38400 R14: 1ffff920025b9f42 R15: ffffffff92c578e8
      FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
      CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
      CR2: 000000c00994e078 CR3: 000000002c250000 CR4: 00000000003506f0
      DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
      DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
      Call Trace:
       <NMI>
       </NMI>
       <TASK>
        instrument_atomic_read include/linux/instrumented.h:68 [inline]
        atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
        queued_spin_is_locked include/asm-generic/qspinlock.h:57 [inline]
        debug_spin_unlock kernel/locking/spinlock_debug.c:101 [inline]
        do_raw_spin_unlock+0x53/0x230 kernel/locking/spinlock_debug.c:141
        __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:150 [inline]
        _raw_spin_unlock_irqrestore+0x22/0x70 kernel/locking/spinlock.c:194
        debug_object_activate+0x349/0x540 lib/debugobjects.c:726
        debug_work_activate kernel/workqueue.c:578 [inline]
        insert_work+0x30/0x230 kernel/workqueue.c:1650
        __queue_work+0x62e/0x11d0 kernel/workqueue.c:1802
        __queue_delayed_work+0x1bf/0x270 kernel/workqueue.c:1953
        queue_delayed_work_on+0x106/0x130 kernel/workqueue.c:1989
        queue_delayed_work include/linux/workqueue.h:563 [inline]
        schedule_delayed_work include/linux/workqueue.h:677 [inline]
        nsim_dev_trap_report_work+0x9c0/0xc80 drivers/net/netdevsim/dev.c:842
        process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
        process_scheduled_works kernel/workqueue.c:2706 [inline]
        worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
        kthread+0x2c6/0x3a0 kernel/kthread.c:388
        ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
        ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
       </TASK>
      
      Fixes: 012ec02a ("netdevsim: convert driver to use unlocked devlink API during init/fini")
      Reported-by: default avatarsyzbot <syzkaller@googlegroups.com>
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Reviewed-by: default avatarJiri Pirko <jiri@nvidia.com>
      Link: https://lore.kernel.org/r/20240201175324.3752746-1-edumazet@google.comSigned-off-by: default avatarJakub Kicinski <kuba@kernel.org>
      ba5e1272
    • Michael Lass's avatar
      net: Fix from address in memcpy_to_iter_csum() · fe92f874
      Michael Lass authored
      While inlining csum_and_memcpy() into memcpy_to_iter_csum(), the from
      address passed to csum_partial_copy_nocheck() was accidentally changed.
      This causes a regression in applications using UDP, as for example
      OpenAFS, causing loss of datagrams.
      
      Fixes: dc32bff1 ("iov_iter, net: Fold in csum_and_memcpy()")
      Cc: David Howells <dhowells@redhat.com>
      Cc: stable@vger.kernel.org
      Cc: regressions@lists.linux.dev
      Signed-off-by: default avatarMichael Lass <bevan@bi-co.net>
      Reviewed-by: default avatarJeffrey Altman <jaltman@auristor.com>
      Acked-by: default avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      fe92f874
    • Furong Xu's avatar
      net: stmmac: xgmac: fix handling of DPP safety error for DMA channels · 46eba193
      Furong Xu authored
      Commit 56e58d6c ("net: stmmac: Implement Safety Features in
      XGMAC core") checks and reports safety errors, but leaves the
      Data Path Parity Errors for each channel in DMA unhandled at all, lead to
      a storm of interrupt.
      Fix it by checking and clearing the DMA_DPP_Interrupt_Status register.
      
      Fixes: 56e58d6c ("net: stmmac: Implement Safety Features in XGMAC core")
      Signed-off-by: default avatarFurong Xu <0x1207@gmail.com>
      Reviewed-by: default avatarSimon Horman <horms@kernel.org>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      46eba193
  5. 01 Feb, 2024 22 commits