linux-ext4 - [Bug 195729] JBD2: Spotted dirty metadata buffer (dev = sda1, blocknr = 1766784).There's a risk of filesystem corruption in case of system crash.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 12 May 2017 14:53:51 +0000
From:   bugzilla-daemon@...zilla.kernel.org
To:     linux-ext4@...nel.org
Subject: [Bug 195729] JBD2: Spotted dirty metadata buffer (dev = sda1,
 blocknr = 1766784).There's a risk of filesystem corruption in case of system
 crash.

https://bugzilla.kernel.org/show_bug.cgi?id=195729

--- Comment #2 from jqiaoulk@...il.com ---
So briefly speaking, one following call must incorrect call spin_lock or other
functions that disable the preemption in this failure case:

For example:

Failure case:

stm_display_output_start()
spin_lock()
_ZN16CSTmMasterOutput5StartEPK18stm_display_mode_s  -------> We can't sleep
here since it is in the critical section !!!
spin_unlock()
Call Sequence:

(1) vibe_os_clk_set_parent

(2)
_ZN12CSTmClockLLA6EnableE29stm_clk_divider_output_name_t31stm_clk_divider_output_source_t31stm_clk_divider_output_divide_t

(3) _ZN16CSTmMainTVOutput15SetOutputFormatEj

(4) _ZN16CSTmMasterOutput5StartEPK18stm_display_mode_s

(5) stm_display_output_start()

(6) dil_blender_output_start

(7) cdi_hdmi_exit

(8) dil_hdmi_set_video_code

(9) hdmi_release

(10) hdmi_ioctl()

-- 
You are receiving this mail because:
You are watching the assignee of the bug.