Bug: recent printk recursion

Author: dgjv

August undefined, 2024

WebLinux kernel for Nexus 5 (hammerhead) WebApr 9, 2024 · <2> [36846.597000] [1]BUG: recent printk recursion! -'<4>WARNING: at kernel/softirq.c:276 local_bh_enable_ip+0x90/0xc4 () <2> [36846.597000] [1]' <2> [36846.597000] [1]<1>Unable to handle kernel...

#573460 - BUG: recent printk recursion! - Debian Bug …

Web>> -static int printk_recursion_bug; >> - >> asmlinkage int vprintk(const char *fmt, va_list args) >> {>> + /* cpu currently holding logbuf_lock */ >> + static volatile unsigned int … WebNov 9, 2016 · It turns out that printk () calls can be recursive, the usual ban on recursion in the kernel notwithstanding. Recursive calls can happen as the result of warnings issued from deep within the kernel; lock debugging … oraciones affirmative negative interrogative

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WebApr 1, 2024 · printk 的代码逻辑是想要阻止 crash 以外的重入的，因此有了 recursion_bug 这种断言 bug 的逻辑。下例来自 3.10. 1516 1519 if (unlikely (logbuf_cpu == this_cpu)) … WebLinux kernel for Nexus 5 (hammerhead) Webkeep in `recursion_bug' smp_processor_id of the CPU (the most recent one) that has caused a recursive printk bug. For instance, the error message will change from BUG: … portsmouth ny

Re: [debug patch] printk: Add a printk killswitch to robustify NMI ...

WebBUG: recent printk recursion! E[ DRM] GPU lockup - switching to software fbcon this of course means X wont come up. the last working kernel seems to be 3.11. i've tested … WebMar 9, 2010 · Mar 5 10:18:50 VPS-NODE kernel: BUG: recent printk recursion! This is somehow being replicated on the guests machines. I've read that printk is a kernel function that prints out a message, during bootup Has anyone experienced similar problem or … portsmouth nurses strikeWebJun 28, 2013 · text 4.38 KB None 0 0 raw download clone embed print report NR_IRQS:16 nr_irqs:16 16 sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every … portsmouth obituaries archives

"WebAhh, what we could do is something like the below and delay both the acquire and release of the console_sem. --- kernel/printk.c 86 +++++----- 1 files changed, 40 insertions(+), 46 deletions(-) diff--git a/kernel/printk.c b/kernel/printk.c index 3518539..d3bdf5a 100644 --- a/kernel/printk.c +++ b/kernel/printk.c @@ -686,6 +686,7 @@ static ... " - Bug: recent printk recursion

Bug: recent printk recursion

http://oliveryang.net/2024/03/linux-printk-flooding/ WebSo let's complain about anything we don't understand, not just %n, and stop pretending that we'd be able to make sense of the rest of the format/arguments. If the offending specifier is in a printk() call we unfortunately only get a "BUG: recent printk recursion!", but at least direct users of the sprintf family will be caught.

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Web[] <2>BUG: recent printk recursion! at virtual address 00000034 BUG: unable to handle kernel NULL pointer dereference at virtual address 000001aa And with … WebWe use printk-safe now which makes printk-recursion detection code in vprintk_emit() unreachable. The tricky thing here is that, apart from detecting and reporting printk recursions, that code also used to zap_locks() in case of panic() from the same CPU. However, zap_locks() does not look to be needed anymore:

http://visa.lab.asu.edu/gitlab/fstrace/android-kernel-msm-hammerhead-3.4-marshmallow-mr3/blob/4c30c6f566c0989ddaee3407da44751e340a63ed/kernel/printk.c Web[ 4769.633975] [] <2>BUG: recent printk recursion! [ 4769.633975] [] common_interrupt+0x2e/0x34 [ 4769.633975] [] ? …

Web- KERN_CRIT "BUG: recent printk recursion!\n";-static int printk_recursion_bug;-asmlinkage int vprintk(const char *fmt, va_list args) {+ /* cpu currently holding … WebLinux kernel for Nexus 5 (hammerhead)

WebCreated attachment 109919 complete dmesg from 3.18-rc4 all kernels since 3.13 immidiatly print this while loading the initrd: (copied by hand) ----- BUG: recent printk recursion! E[ DRM] GPU lockup - switching to software fbcon ----- this of course means X wont come up. the last working kernel seems to be 3.11. i've tested 3.13, 3.15, 3.16, 3.17 and 3.18-rc4 …

Web*PATCH] Fix faulty logic in the case of recursive printk @ 2014-08-24 16:01 Patrick Palka 2014-08-26 8:48 ` Jan Kara 2014-08-26 9:19 ` Petr Mládek 0 siblings, 2 replies; 7+ messages in thread From: Patrick Palka @ 2014-08-24 16:01 UTC (permalink / raw) To: linux-kernel; +Cc: akpm, pmladek, jack, rostedt, Patrick Palka We shouldn't set text_len … oracion sin verboWebJun 14, 2024 · 问题：BUG: recent printk recursion!解答：在重载了sched_clock函数中调用了printk函数导致，具体原因没有深究。转载 … oraciones con a little y a fewhttp://visa.lab.asu.edu/gitlab/fstrace/android-kernel-msm-hammerhead-3.4-marshmallow-mr3/commits/331995e78385a0b9860f4c4c1766e842e61c450a/kernel/printk.c portsmouth obituaries ukWeb(yes, NMIs are not available on every platform) and even more. we can start dump_stack() from recursion detection path to that alternative printk-buffer, which is a bit more helpful than "BUG: recent printk recursion!" !!!not tested, will not compile, just an idea!!! oracion thanksgivingWebNext in thread: Sergey Senozhatsky: "[RFC][PATCHv5 4/7] printk: always use deferred printk when flush printk_safe lines" Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] We use printk-safe now which makes printk-recursion detection code oracion third conditionalWebMar 11, 2010 · BUG: recent printk recursion! Package: linux-image-2.6.26-2-openvz-amd64 ; Maintainer for linux-image-2.6.26-2-openvz-amd64 is (unknown); Reported by: … oracion san benitoWebprintk_alternative_enter() and printk_alternative_exit(), not to confuse anyone. (yes, NMIs are not available on every platform) and even more. we can start dump_stack() from recursion detection path to that alternative printk-buffer, which is a bit more helpful than "BUG: recent printk recursion!"!!!not tested, will not compile, just an idea!!!--- portsmouth obituaries today