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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?8Z8BojxvF0XSxSrKHdLIrGNXRH0zw7VUVXdmZ19ZsXWHuU5q3LcAJ1SJ33ZI?= =?us-ascii?Q?eg4pHJ3OWIsl2jUbdDifT1FS5We2xCiHNT/FDK/dUUgWNYhLqrRtORJN7Yia?= =?us-ascii?Q?SEOcHu1lIQmRWFGAhkMN+nGcuUPEzfx+fBlevF7Gx1o4yKWdkD6PImBk70jJ?= =?us-ascii?Q?TY4sA9Ka4q3Wzjab4r4H5FHBW04zUZAE3Gna+mcF49Y/g2e7xyVENZVHLdaW?= =?us-ascii?Q?1Pa/St4WMxpzV2PKAehUrXrq8QaWcw+Tv8UxFFtHv7lF7kfHrTRqBh/j9JQ2?= =?us-ascii?Q?k+IE+MKuO9xy2S7OeT4aEZCH4kqlXmkSvqEL2wdQllvU8fM1mZT288i/oGGW?= =?us-ascii?Q?Z3bP9XA+Pld0GuGmsd2dkg1l0skX1AZ2lW2CgKsoehooJ8dCpUizS4tYk/89?= =?us-ascii?Q?YsoiU/WtK0ae+mLDSyNWQVAwXAe0ttjf2gLFUK12yq/KJv4Jg3Nb8phP+ZjR?= =?us-ascii?Q?1QLeJk9PTDnuZePymrQk1THSi21kbcy7XNGL/KClLuKjV2ailN4DzbFfo+5F?= =?us-ascii?Q?a+CikDqt933jkpUUkgbkTSAia0OdmIynUe48D3vYOiICxthv0sIROKso6j5Z?= =?us-ascii?Q?+dqzyMWDpfLQ7MPuvjQLDvqA7DwK41JmSU4XzNFJjTS3m7OamSWr8BouURo+?= =?us-ascii?Q?Edc/oHYHo3ac3A5R+Ta8yGUbEK2W0i6hi29OFRbchvKMvUou8vEruZRWOS4T?= =?us-ascii?Q?PPNylTfWN45Mz23GYJ6M5YZUBtG9nDI68LOVDDsw8c/NXST9SdAL1pbArpcN?= =?us-ascii?Q?dy6Lhh0I3uP37Q7XNbQyVhzW3UEAA3UItBBVJS8kHvwhpEQnSZd0XkTqA1Wm?= =?us-ascii?Q?kyaQPYjJVi4UARI7TvPU6hucerPJzpfu0WqjXjm7j8xR/jtB/A6/dkfBX3a7?= =?us-ascii?Q?YCr0fAubSZo2QoLujTHCQhzb0gwKhnRtoh5EpaKiSgNwvhjOQFVsUUgAltCU?= =?us-ascii?Q?5zA2pZ5iO/Jq7snizY8clyHzRjMJNV2hx2OlwFgMvrtqidPP31khoyZho41e?= =?us-ascii?Q?jflp0OQnTPSl3Bqhypz5V/y8Hq0kRGnhAN5WElGm2Z1Nc0KljylsSBfbJwm0?= =?us-ascii?Q?uvTnR+waZQr+Bl5jQagu1jmK4Q/P23JSFeQGZ1O78PC+YOrcyxZcZdKOTv2S?= =?us-ascii?Q?FjO1RYQWRTs5+mlMhk+kIMtkDelYDUe3vWzLIYcprC9qHcmEFdS7dOoFnt05?= =?us-ascii?Q?sa/ypZ9YSTmxys7QB+yVnw6lgCNK0wZUPB4mwA/ZVwgQ6pRxv8+F8Nlkvi1V?= =?us-ascii?Q?akLGf36wsacpVFnemcrsCBWzMICVWz2+sVLWAhwwkGVc+gZ8hQHI5+4e7BFV?= =?us-ascii?Q?tnbdX2fd+LWpvvKHaBouAeYl0H2EIbfkqlyhqk60FbmaAvPtAEQ/68byY/2w?= =?us-ascii?Q?fcN0zV+Q2AcawYfPF4Mv6X3bsY4DeqayPnl3/6CBiI2KGD/savc6oW4opvTc?= =?us-ascii?Q?sywsDphByL1ppdivtikcgCDpJKOYuzlgROvA74jDZX7/j17+5wht9IPD9lx0?= =?us-ascii?Q?xOviG4SXTl3WdrrdwiwvOGih9eSdhleblfhrNh9RwpcBilxv8+vQ3DHhs+Ec?= =?us-ascii?Q?TYxXilWtnYNKtCT1csS0MteudSGEVlk7+o9PlUNl?= X-MS-Exchange-CrossTenant-Network-Message-Id: 54bad664-1fc2-4301-8fe0-08dc94f7d674 X-MS-Exchange-CrossTenant-AuthSource: DM6SPR01MB0112.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 25 Jun 2024 09:18:55.6362 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 0c9Wkr6Yd1mUbWK0RJ01wexI5IvSycdc7NwyT8+E1w6hDcFkVU0ghDj+OQHEXRCJXyHdS8tmHnuanP8NhTRIVg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR11MB8098 X-OriginatorOrg: intel.com Hi Marco, On 2024-06-25 at 10:21:57 +0200, Marco Elver wrote: > On Tue, 25 Jun 2024 at 04:15, Pengfei Xu wrote: > > > > Hi Andrey, > > > > Greeting! > > > > There is BUG: MAX_LOCKDEP_KEYS too low! in v6.10-rc5 kernel. > > > > All detailed info: https://github.com/xupengfe/syzkaller_logs/tree/main/240624_120854__MAX_LOCKDEP_KEYS_too_low > > Syzkaller reproduced code: https://github.com/xupengfe/syzkaller_logs/blob/main/240624_120854__MAX_LOCKDEP_KEYS_too_low/repro.c > > Syzkaller syscall repro steps: https://github.com/xupengfe/syzkaller_logs/blob/main/240624_120854__MAX_LOCKDEP_KEYS_too_low/repro.prog > > Mount img: https://github.com/xupengfe/syzkaller_logs/blob/main/240624_120854__MAX_LOCKDEP_KEYS_too_low/mount_0.gz > > Syzkaller report: https://github.com/xupengfe/syzkaller_logs/blob/main/240624_120854__MAX_LOCKDEP_KEYS_too_low/repro.report > > Kconfig(make olddefconfig): https://github.com/xupengfe/syzkaller_logs/blob/main/240624_120854__MAX_LOCKDEP_KEYS_too_low/kconfig_origin > > Bisect info: https://github.com/xupengfe/syzkaller_logs/blob/main/240624_120854__MAX_LOCKDEP_KEYS_too_low/bisect_info.log > > v6.10-rc5 dmesg: https://github.com/xupengfe/syzkaller_logs/blob/main/240624_120854__MAX_LOCKDEP_KEYS_too_low/f2661062f16b2de5d7b6a5c42a9a5c96326b8454_dmesg.log > > > > Bisected and found related commit: > > cc478e0b6bdf kasan: avoid resetting aux_lock > > This is known to trigger on heavily instrumented kernels. > > On syzbot we just increase CONFIG_LOCKDEP_BITS and friends [1]. See [2]. > > [1] https://github.com/google/syzkaller/blob/master/dashboard/config/linux/bits/lockdep.yml > [2] https://github.com/torvalds/linux/blob/55027e689933ba2e64f3d245fb1ff185b3e7fc81/lib/Kconfig.debug#L1505 > > I don't see it set in your config. You should probably enable it on > heavily instrumented builds. Thank you very much for your suggestion and link sharing for pointing me towards the relevant configuration options. I have updated the kernel configuration to set CONFIG_LOCKDEP_BITS=17 to avoid such issues in the future. And I will take care some other kconfig items like "CONFIG_LOCKDEP_CHAINS_BITS". I will try some other number for CONFIG_LOCKDEP_BITS if it's necessary. Thanks for your guidance and sorry for inconvenience. Best Regards, Thanks! > > > " > > [ 157.974013] BUG: MAX_LOCKDEP_KEYS too low! > > [ 157.974233] turning off the locking correctness validator. > > [ 157.974459] CPU: 1 PID: 736 Comm: repro Tainted: G W 6.10.0-rc5-f2661062f16b+ #1 > > [ 157.974864] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014 > > [ 157.975392] Call Trace: > > [ 157.975502] > > [ 157.975600] dump_stack_lvl+0xea/0x150 > > [ 157.975786] dump_stack+0x19/0x20 > > [ 157.975937] register_lock_class+0xaee/0x10d0 > > [ 157.976136] ? __pfx_register_lock_class+0x10/0x10 > > [ 157.976351] ? __pfx_mark_lock.part.0+0x10/0x10 > > [ 157.976553] __lock_acquire+0xfe/0x5ca0 > > [ 157.976727] ? __pfx_mark_lock.part.0+0x10/0x10 > > [ 157.976929] ? __pfx_register_lock_class+0x10/0x10 > > [ 157.977140] ? __kasan_check_read+0x15/0x20 > > [ 157.977325] ? __pfx___lock_acquire+0x10/0x10 > > [ 157.977517] ? __kasan_check_read+0x15/0x20 > > [ 157.977696] ? mark_lock.part.0+0xf3/0x17a0 > > [ 157.977878] ? __kasan_check_read+0x15/0x20 > > [ 157.978059] lock_acquire+0x1ce/0x580 > > [ 157.978221] ? touch_wq_lockdep_map+0x75/0x130 > > [ 157.978416] ? register_lock_class+0xbf/0x10d0 > > [ 157.978610] ? __pfx_lock_acquire+0x10/0x10 > > [ 157.978794] ? __pfx_register_lock_class+0x10/0x10 > > [ 157.979000] ? lockdep_init_map_type+0x2df/0x810 > > [ 157.979201] ? lockdep_init_map_type+0x2df/0x810 > > [ 157.979403] ? touch_wq_lockdep_map+0x75/0x130 > > [ 157.979598] touch_wq_lockdep_map+0x8a/0x130 > > [ 157.979786] ? touch_wq_lockdep_map+0x75/0x130 > > [ 157.979988] __flush_workqueue+0xfd/0x1040 > > [ 157.980164] ? __this_cpu_preempt_check+0x21/0x30 > > [ 157.980370] ? lock_release+0x418/0x840 > > [ 157.980542] ? __pfx___flush_workqueue+0x10/0x10 > > [ 157.980745] ? __mutex_unlock_slowpath+0x16f/0x630 > > [ 157.980979] ? xfs_log_force+0x1db/0xa30 > > [ 157.981191] ? sync_filesystem+0x1e5/0x2a0 > > [ 157.981386] xlog_cil_push_now.isra.0+0x6c/0x210 > > [ 157.981588] xlog_cil_force_seq+0x1d4/0x790 > > [ 157.981775] ? __pfx_xlog_cil_force_seq+0x10/0x10 > > [ 157.981982] ? xfs_fs_sync_fs+0x1ed/0x3a0 > > [ 157.982157] ? debug_smp_processor_id+0x20/0x30 > > [ 157.982358] ? rcu_is_watching+0x19/0xc0 > > [ 157.982532] ? __sanitizer_cov_trace_const_cmp1+0x1e/0x30 > > [ 157.982767] ? sync_filesystem+0x1e5/0x2a0 > > [ 157.982944] xfs_log_force+0x1db/0xa30 > > [ 157.983109] ? sync_filesystem+0x1e5/0x2a0 > > [ 157.983287] ? sync_filesystem+0x1e5/0x2a0 > > [ 157.983464] xfs_fs_sync_fs+0x1ed/0x3a0 > > [ 157.983632] ? __pfx_xfs_fs_sync_fs+0x10/0x10 > > [ 157.983821] sync_filesystem+0x1e5/0x2a0 > > [ 157.983990] generic_shutdown_super+0x8c/0x520 > > [ 157.984183] kill_block_super+0x45/0xa0 > > [ 157.984349] xfs_kill_sb+0x1e/0x60 > > [ 157.984498] deactivate_locked_super+0xcb/0x1c0 > > [ 157.984694] deactivate_super+0xc0/0xe0 > > [ 157.984865] cleanup_mnt+0x2fc/0x460 > > [ 157.985023] __cleanup_mnt+0x1f/0x30 > > [ 157.985179] task_work_run+0x19c/0x2b0 > > [ 157.985343] ? __pfx_task_work_run+0x10/0x10 > > [ 157.985528] ? __this_cpu_preempt_check+0x21/0x30 > > [ 157.985734] ? syscall_exit_to_user_mode+0x109/0x200 > > [ 157.985951] syscall_exit_to_user_mode+0x1ec/0x200 > > [ 157.986160] do_syscall_64+0x79/0x140 > > [ 157.986322] entry_SYSCALL_64_after_hwframe+0x76/0x7e > > [ 157.986536] RIP: 0033:0x7fab3634e87b > > [ 157.986692] Code: 0f 1e fa 48 89 fe 31 ff e9 72 08 00 00 66 90 f3 0f 1e fa 31 f6 e9 05 00 00 00 0f 1f 44 00 00 f3 0f 1e fa b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 05 c3 0f 1f 40 00 48 8b 15 71 b5 0a 00 f7 d8 > > [ 157.987430] RSP: 002b:00007ffc181e2598 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 > > [ 157.987742] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fab3634e87b > > [ 157.988031] RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffc181e2640 > > [ 157.988321] RBP: 00007ffc181e3680 R08: 0000000000000000 R09: 00007ffc181e2430 > > [ 157.988611] R10: 00007fab363b13e0 R11: 0000000000000202 R12: 00007ffc181e37f8 > > [ 157.988761] XFS (loop7): Ending clean mount > > [ 157.988901] R13: 0000000000403138 R14: 000000000040fe08 R15: 00007fab36460000 > > [ 157.989407] > > " > > > > I hope it's helpful. > > > > Thanks! > >