linux-kernel - Re: v4.9.234, WARNING: CPU: 1 PID: 166 at kernel/locking/lockdep.c:3326

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Date:   Wed, 2 Sep 2020 15:52:30 +0800
From:   Chris Ruehl <chris.ruehl@...ys.com.hk>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: v4.9.234, WARNING: CPU: 1 PID: 166 at
 kernel/locking/lockdep.c:3326

Hi,

after investigate, the eMMC of the board is damaged and triggers all 
kind of funny exceptions.

If you not see any urgent bug, you might want to ignore this oops.

Chris

On 2/9/2020 1:39 pm, Chris Ruehl wrote:
> Hi,
>
> have a reproachable kernel crash oops after update to 4.9.234
> IMX6DL boot process.
>
> Regards
> Chris
>
> [  OK  ] Started Various fixups to make systemd work better on Debian.
> [    3.635568] ------------[ cut here ]------------
> [    3.640597] WARNING: CPU: 1 PID: 166 at 
> kernel/locking/lockdep.c:3326 __lock_acquire+0x58c/0x1cf0
> [    3.649480] DEBUG_LOCKS_WARN_ON(class_idx > MAX_LOCKDEP_KEYS)[ 
> 3.655058] Modules linked in:
> [    3.658131] CPU: 1 PID: 166 Comm: systemd-cgroups Not tainted 
> 4.9.234 #57
> [    3.664927] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
> [    3.671458] Backtrace:
> [    3.673949] [<c010b1c8>] (dump_backtrace) from [<c010b478>] 
> (show_stack+0x18/0x1c)
> [    3.681526]  r6:60000093 r5:00000000 r4:c0d1d434 r3:00000000
> [    3.687202] [<c010b460>] (show_stack) from [<c03ab94c>] 
> (dump_stack+0xf0/0x11c)
> [    3.694528] [<c03ab85c>] (dump_stack) from [<c01246ac>] 
> (__warn+0xec/0x104)
> [    3.701498]  r8:00000cfe r7:00000009 r6:c0aebbc0 r5:00000000 
> r4:ec86fd38 r3:00000001
> [    3.709249] [<c01245c0>] (__warn) from [<c0124704>] 
> (warn_slowpath_fmt+0x40/0x48)
> [    3.716739]  r9:ee1c6560 r8:00000002 r7:ee1c6000 r6:c0d1d508 
> r5:c14dc0ac r4:c0ae8f88
> [    3.724492] [<c01246c8>] (warn_slowpath_fmt) from [<c0173080>] 
> (__lock_acquire+0x58c/0x1cf0)
> [    3.732933]  r3:c0aecb48 r2:c0ae8f88
> [    3.736511]  r4:c3c3c50c
> [    3.739052] [<c0172af4>] (__lock_acquire) from [<c0174c0c>] 
> (lock_acquire+0x78/0x98)
> [    3.746801]  r10:b6fa9000 r9:ee7a0480 r8:c0d51598 r7:00000001 
> r6:00000080 r5:60000093
> [    3.754632]  r4:00000000
> [    3.757180] [<c0174b94>] (lock_acquire) from [<c080b2b8>] 
> (_raw_spin_lock_irq+0x5c/0x6c)
> [    3.765275]  r7:b6fa9000 r6:ed9fe118 r5:c01fbc08 r4:ed9fe118
> [    3.770946] [<c080b25c>] (_raw_spin_lock_irq) from [<c01fbc08>] 
> (__vma_link_file+0x80/0x98)
> [    3.779299]  r5:ec9009f8 r4:ed9fe10c
> [    3.782882] [<c01fbb88>] (__vma_link_file) from [<c01fc528>] 
> (__vma_adjust+0xc4/0x664)
> [    3.790803]  r6:ec900840 r5:ec900c08 r4:ec900c44 r3:ec9009f8
> [    3.796471] [<c01fc464>] (__vma_adjust) from [<c01fcbe4>] 
> (__split_vma+0x11c/0x1b8)
> [    3.804133]  r10:b6fa9000 r9:00000000 r8:c0d51598 r7:b6fa9000 
> r6:00000000 r5:ec900c08
> [    3.811964]  r4:ec9009f8
> [    3.814507] [<c01fcac8>] (__split_vma) from [<c01fd6ac>] 
> (split_vma+0x28/0x34)
> [    3.821736]  r9:00100073 r8:ee7a0480 r7:b6fa8000 r6:00000000 
> r5:00000000 r4:ec900c08
> [    3.829487] [<c01fd684>] (split_vma) from [<c0200114>] 
> (mprotect_fixup+0x244/0x274)
> [    3.837151] [<c01ffed0>] (mprotect_fixup) from [<c0200298>] 
> (do_mprotect_pkey+0x154/0x20c)
> [    3.845420]  r10:0000007d r9:b6fa9000 r8:00000005 r7:00000001 
> r6:00000000 r5:00000001
> [    3.853252]  r4:b6fa9000
> [    3.855794] [<c0200144>] (do_mprotect_pkey) from [<c0200364>] 
> (SyS_mprotect+0x14/0x18)
> [    3.863717]  r9:ec86e000 r8:c0107c44 r7:0000007d r6:b6f8a250 
> r5:b6fd3d98 r4:b6fd2c50
> [    3.871469] [<c0200350>] (SyS_mprotect) from [<c0107a60>] 
> (ret_fast_syscall+0x0/0x1c)
> [    3.879306] ---[ end trace 890e4e38c95446ca ]---