Control: retitle -1 linux-image-6.5.0-1-amd64: Kernel page fault in process exit due to bit flip Control: tag -1 moreinfo
On Wed, 2023-09-27 at 20:45 +0200, Gabriel Francisco wrote: > Package: src:linux > Version: 6.5.3-1 > Severity: important > Tags: upstream > X-Debbugs-Cc: frc.gabr...@gmail.com > > Dear Maintainer, > > First of all thanks for your hard work! > > I noticed my computer started freezing for few seconds when entering/exiting > full screen videos in youtube using firefox and while trying to check if the > issue also afected chromium I saw the following message in dmesg: > > [12569.564300] BUG: unable to handle page fault for address: ffff991989e936b8 > [12569.564304] #PF: supervisor write access in kernel mode > [12569.564306] #PF: error_code(0x0002) - not-present page The first BUG message should be more meaningful that what comes after. This shows the kernel tried to access non-existent memory. > [12569.564308] PGD 0 P4D 0 > [12569.564311] Oops: 0002 [#1] PREEMPT SMP NOPTI > [12569.564314] CPU: 10 PID: 328649 Comm: Chroot Helper Not tainted > 6.5.0-1-amd64 #1 Debian 6.5.3-1 > [12569.564317] Hardware name: ASUS System Product Name/ROG STRIX B550-F > GAMING WIFI II, BIOS 3205 08/14/2023 > [12569.564318] RIP: 0010:down_write+0x23/0x70 > [12569.564324] Code: 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 53 48 89 > fb e8 2e bc ff ff bf 01 00 00 00 e8 74 3a 53 ff 31 c0 ba 01 00 00 00 <f0> 48 > 0f b1 13 75 33 65 48 8b 04 25 80 29 03 00 48 89 43 08 bf 01 > [12569.564326] RSP: 0018:ffffa189d736fc70 EFLAGS: 00010246 > [12569.564328] RAX: 0000000000000000 RBX: ffff991989e936b8 RCX: > ffff891797aaef00 > [12569.564330] RDX: 0000000000000001 RSI: ffff891989e645c0 RDI: > ffffffff8e7c95dc > [12569.564331] RBP: ffffffffffffffff R08: 0000000000000060 R09: > 0000000080400014 > [12569.564333] R10: ffff8918cbfeb7f8 R11: 0000000000000006 R12: > 00007f7e5fd00000 > [12569.564334] R13: 0000000000000001 R14: ffff891989e645c0 R15: > ffff891989e64958 The CPU registers contain several addresses starting ffff89, except for rbx which starts ffff99 (and is the faulting address). That looks like a single bit got flipped. This could be due to a kernel bug, but is more likely a hardware problem. Please test the RAM with memtest86+. Also if you've enabled any overclocking options, turn those off. [...] > After that the computer can't shutdown and systemd keeps waiting on process > PID 328649 (Chroot Helper). This (and the other BUG messages) are because that process crashed in kernel mode and couldn't properly exit. Ben. -- Ben Hutchings Beware of bugs in the above code; I have only proved it correct, not tried it. - Donald Knuth
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