Hi
I've had a few issues lately (mainly bad RAM only, hopefully, which should be fixed now) and generally upgraded everything. With 5.1.5, though, some programs exhibited very weird behavior: Chromium crashed while starting up due to not being able to launch a new zygote process, albeit started when using --no-sandbox (likely because that didn't try to create other processes); Opera (based upon Chromium) failed to start with SIGILL, but that was only a red herring triggered by the same problem I guess; Firefox started up, but was unable to render any content because its multi-process IPC didn't work (i.e., it couldn't start new rendering processes). Interestingly, most other programs I use daily still worked, even though they used networking and IPC (command-line browsers, MATE Terminal, electron-based programs), so this bug didn't make the machine completely unusable. Since I've been using 5.1.3 without problems before and the issue was straight-forward to test for, I did a bisection run and came to that conclusion: ================================ bisect log ================================ Bisecting: 124 revisions left to test after this (roughly 7 steps) [ee4c3e283f8f3286bea60e9038adc70436d87d02] s390/mm: convert to the generic get_user_pages_fast code Bisecting: 62 revisions left to test after this (roughly 6 steps) [f7346dc0634cbad7fca5d951b91ad2e13f497b0b] clk: mediatek: Disable tuner_en before change PLL rate Bisecting: 30 revisions left to test after this (roughly 5 steps) [5ac8e698528149bb1618111d64e22bd8bb784256] parisc: Allow live-patching of __meminit functions Bisecting: 15 revisions left to test after this (roughly 4 steps) [c89c9af998fef2af4e5b2b35fb723693f17e05ef] mlxsw: core: Prevent QSFP module initialization for old hardware Bisecting: 7 revisions left to test after this (roughly 3 steps) [912d8c4cf9f19c93dfdf06b822eeadec9d71494d] net: test nouarg before dereferencing zerocopy pointers Bisecting: 3 revisions left to test after this (roughly 2 steps) [92166190b8282d9925e90a66961879782c50d037] rtnetlink: always put IFLA_LINK for links with a link-netnsid Bisecting: 1 revision left to test after this (roughly 1 step) [7d29c9ad0ed525c1b10e29cfca4fb1eece1e93fb] vsock/virtio: free packets during the socket release Bisecting: 0 revisions left to test after this (roughly 0 steps) [2d08f204328acaf85ac2c6fe5d5d9d4760f12e13] tipc: fix modprobe tipc failed after switch order of device registration 2d08f204328acaf85ac2c6fe5d5d9d4760f12e13 is the first bad commit commit 2d08f204328acaf85ac2c6fe5d5d9d4760f12e13 Author: Junwei Hu <hujunw...@huawei.com> Date: Fri May 17 19:27:34 2019 +0800 tipc: fix modprobe tipc failed after switch order of device registration [ Upstream commit 532b0f7ece4cb2ffd24dc723ddf55242d1188e5e ] Error message printed: modprobe: ERROR: could not insert 'tipc': Address family not supported by protocol. when modprobe tipc after the following patch: switch order of device registration, commit 7e27e8d6130c ("tipc: switch order of device registration to fix a crash") Because sock_create_kern(net, AF_TIPC, ...) is called by tipc_topsrv_create_listener() in the initialization process of tipc_net_ops, tipc_socket_init() must be execute before that. I move tipc_socket_init() into function tipc_init_net(). Fixes: 7e27e8d6130c ("tipc: switch order of device registration to fix a crash") Signed-off-by: Junwei Hu <hujunw...@huawei.com> Reported-by: Wang Wang <wangwa...@huawei.com> Reviewed-by: Kang Zhou <zhouka...@huawei.com> Reviewed-by: Suanming Mou <mousuanm...@huawei.com> Signed-off-by: David S. Miller <da...@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> :040000 040000 13d9b014338ccf6ae0c32bdb2be779870bbf97da df8a9c2a9f1f8df212999c2904632a77adb03782 M net =============================== / bisect log =============================== My kernel config is tailored to my machine, so probably not very useful to others, but I'm including it anyway. The most obvious point being CONFIG_TIPC=y, i.e., TIPC being built statically into the kernel. Not sure why I've done that in the first place because TIPC is not something that would be useful to me, but I often err on the "might be useful later" side. I might rethink that decision and just disable TIPC for good in the future. With this patch applied, the kernel generally spews out a few wonky messages that I've never seen before. For completeness sake, I've attached a ring buffer log from running the last working and first bad version. ================================ TIPC messages ================================ NET: Registered protocol family 30 Failed to register TIPC socket type =============================== / TIPC messages =============================== Now, blindly reverting the patch would obviously a bad idea, since that would mean trading one regression for the (initial) other one. I'm thus CCing the maintainers to help. Mihai
config-5.1.3.xz
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dmesg-5.1.4-00013-g2d08f204328a.log.xz
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dmesg-5.1.4-00012-g7d29c9ad0ed5.log.xz
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