Re: [PATCH 4.19 000/220] 4.19.86-stable review

Guenter Roeck
2019-11-22T14:47:11Z

On 11/22/19 2:26 AM, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 4.19.86 release.
> There are 220 patches in this series, all will be posted as a response
> to this one. If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Sun, 24 Nov 2019 09:59:19 +0000.
> Anything received after that time might be too late.
>

I see the following warning (at least for arm64, ppc64, and x86_64).
This seems to be caused by "idr: Fix idr_get_next race with idr_remove".
v4.14.y is also affected. Mainline and v5.3.y are not affected.

Guenter

---
[ 3.897800] NetLabel: Initializing
[ 3.897944] NetLabel: domain hash size = 128
[ 3.898044] NetLabel: protocols = UNLABELED CIPSOv4 CALIPSO
[ 3.898995]
[ 3.899135] =============================
[ 3.899235] WARNING: suspicious RCU usage
[ 3.899479] 4.19.86-rc1+ #1 Not tainted
[ 3.899595] -----------------------------
[ 3.899772] include/linux/radix-tree.h:241 suspicious rcu_dereference_check() usage!
[ 3.899939]
[ 3.899939] other info that might help us debug this:
[ 3.899939]
[ 3.900159]
[ 3.900159] rcu_scheduler_active = 2, debug_locks = 1
[ 3.900347] 2 locks held by swapper/0/1:
[ 3.900479] #0: (____ptrval____) (cb_lock){+.+.}, at: genl_register_family+0xab/0x717
[ 3.901498] #1: (____ptrval____) (genl_mutex){+.+.}, at: genl_register_family+0xb9/0x717
[ 3.901860]
[ 3.901860] stack backtrace:
[ 3.902136] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.19.86-rc1+ #1
[ 3.902295] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014
[ 3.902633] Call Trace:
[ 3.902633] dump_stack+0x71/0xa0
[ 3.902633] idr_get_next+0x133/0x160
[ 3.902633] ? genl_register_family+0xab/0x717
[ 3.902633] ? do_early_param+0x89/0x89
[ 3.902633] genl_family_find_byname+0x4e/0x80
[ 3.902633] genl_register_family+0xc1/0x717
[ 3.902633] ? do_early_param+0x89/0x89
[ 3.902633] ? netlbl_netlink_init+0x21/0x21
[ 3.902633] netlbl_netlink_init+0x5/0x21
[ 3.902633] netlbl_init+0x4a/0x74
[ 3.902633] do_one_initcall+0x58/0x2ae
[ 3.902633] ? do_early_param+0x89/0x89
[ 3.902633] ? rcu_read_lock_sched_held+0x6f/0x80
[ 3.902633] ? do_early_param+0x89/0x89
[ 3.902633] kernel_init_freeable+0x1bc/0x24b
[ 3.902633] ? rest_init+0x176/0x176
[ 3.902633] kernel_init+0x5/0x101
[ 3.902633] ret_from_fork+0x3a/0x50