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Date: Tue, 8 Oct 2013 18:33:45 -0700 From: Linus Torvalds <torvalds@...ux-foundation.org> To: Fengguang Wu <fengguang.wu@...el.com> Cc: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...nel.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Richard Henderson <rth@...ddle.net>, Jakub Jelinek <jakub@...hat.com>, Oleg Nesterov <oleg@...hat.com> Subject: Re: [x86] BUG: unable to handle kernel NULL pointer dereference at (null) On Tue, Oct 8, 2013 at 6:09 PM, Fengguang Wu <fengguang.wu@...el.com> wrote: > [ 27.189229] BUG: unable to handle kernel NULL pointer dereference at 00000108 > [ 27.190165] IP: [<c1109200>] rw_verify_area+0xa0/0x1b0 This looks like file->f_inode is NULL, and it's trying to access inode->i_flock. There's a number of other ones too (that last delayed __fput one, for example) that might be due to a NULL inode. And a lot of thre rest are file-handling too, with the BUG_ON() in __put_cred() when there's something wrong with file->f_cred. .. but I have no clue how that could happen and why the asm goto should matter for this. Linus -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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