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ddd062f7536cc09fe7ff1a66816601984bc68af8 ("rcutorture: Complain if an ->up_read() is delayed more than 10 seconds") https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master [test failed on linux-next/master f660850bc246fef15ba78c81f686860324396628] in testcase: rcutorture version: with following parameters: runtime: 300s test: cpuhotplug torture_type: srcud config: x86_64-randconfig-123-20250415 compiler: clang-20 test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G (please refer to attached dmesg/kmsg for entire log/backtrace) +-------------------------------------------------------------------------+------------+------------+ | | 1b983c34d5 | ddd062f753 | +-------------------------------------------------------------------------+------------+------------+ | WARNING:at_kernel/rcu/rcutorture.c:#rcu_torture_updown[rcutorture] | 0 | 24 | | RIP:rcu_torture_updown[rcutorture] | 0 | 24 | +-------------------------------------------------------------------------+------------+------------+ If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-lkp/202504211513.23f21a0-lkp@intel.com The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20250421/202504211513.23f21a0-lkp@intel.com [ 147.544571][ T727] ------------[ cut here ]------------ [ 147.545372][ T727] WARNING: CPU: 0 PID: 727 at kernel/rcu/rcutorture.c:2549 rcu_torture_updown+0xe0/0x430 [rcutorture] [ 147.546643][ T727] Modules linked in: rcutorture torture [ 147.547462][ T727] CPU: 0 UID: 0 PID: 727 Comm: rcu_torture_upd Not tainted 6.15.0-rc1-00008-gddd062f7536c #1 NONE 0a926b04a3771ed2623ec5d12c96d338a637f034 [ 147.549036][ T727] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 [ 147.550241][ T727] RIP: 0010:rcu_torture_updown+0xe0/0x430 [rcutorture] [ 147.551128][ T727] Code: 00 00 48 01 c3 48 8b 44 24 10 42 80 3c 20 00 74 0c 48 c7 c7 00 12 41 87 e8 fd 1b 49 e1 48 3b 1d a6 58 e0 e6 0f 89 84 01 00 00 <0f> 0b e9 7d 01 00 00 4c 89 7c 24 08 4f 8d 3c 2e 49 83 c7 60 4b 8d [ 147.553366][ T727] RSP: 0000:ffff888150ebfe60 EFLAGS: 00210297 [ 147.554154][ T727] RAX: 1ffffffff0e82240 RBX: 00000000ffffc39e RCX: 0000000000000000 [ 147.555179][ T727] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888150eb3450 [ 147.572489][ T727] RBP: ffff888150eb6bd8 R08: 0000000000000000 R09: 0000000000000000 [ 147.573518][ T727] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 147.574582][ T727] R13: ffff888150eb0000 R14: 0000000000003408 R15: ffff888150eb3448 [ 147.577955][ T727] FS: 0000000000000000(0000) GS:ffff888424c90000(0000) knlGS:0000000000000000 [ 147.579066][ T727] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 147.579850][ T727] CR2: 00000000f729a000 CR3: 000000014d67f000 CR4: 00000000000406f0 [ 147.580851][ T727] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 147.581887][ T727] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 147.582799][ T727] Call Trace: [ 147.583264][ T727] [ 147.583703][ T727] kthread+0x4b7/0x5e0 [ 147.584257][ T727] ? rcu_torture_updown_hrt+0x60/0x60 [rcutorture 02ecf78e8bf32d7a769b787a1e354f19e873c8f2] [ 147.591263][ T727] ? kthread_unuse_mm+0x150/0x150 [ 147.591978][ T727] ret_from_fork+0x3c/0x70 [ 147.592545][ T727] ? kthread_unuse_mm+0x150/0x150 [ 147.593167][ T727] ret_from_fork_asm+0x11/0x20 [ 147.593805][ T727] [ 147.594276][ T727] irq event stamp: 340637 [ 147.597624][ T727] hardirqs last enabled at (340653): [] __console_unlock+0x72/0x80 [ 147.598763][ T727] hardirqs last disabled at (340662): [] __console_unlock+0x57/0x80 [ 147.599920][ T727] softirqs last enabled at (340578): [] handle_softirqs+0x5de/0x6e0 [ 147.601075][ T727] softirqs last disabled at (340569): [] __irq_exit_rcu+0x61/0xc0 [ 147.602178][ T727] ---[ end trace 0000000000000000 ]--- -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki