Oops: general protection fault, probably for non-canonical address 0xffff110153f2f300: 0000 [#1] SMP KASAN PTI KASAN: maybe wild-memory-access in range [0xfff8a80a9f979800-0xfff8a80a9f979807] CPU: 1 UID: 0 PID: 14622 Comm: kworker/u8:32 Not tainted 6.17.0-rc1-syzkaller-00127-g715c7a36d59f #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Workqueue: kvfree_rcu_reclaim kfree_rcu_work RIP: 0010:percpu_ref_get_many+0xa3/0x140 include/linux/percpu-refcount.h:205 Code: bf 71 ff 49 bc 00 00 00 00 00 fc ff df 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 e4 4d f7 ff 49 8b 07 a8 03 75 62 <65> 4c 01 30 e8 d4 97 4d 09 85 c0 74 3a e8 6b 96 7a ff 84 c0 75 31 RSP: 0018:ffffc9000513f7c8 EFLAGS: 00010246 RAX: ffff88802e213300 RBX: ffffffff822bc679 RCX: 5ad12138658b0300 RDX: 0000000000000000 RSI: ffffffff8be333e0 RDI: ffffffff8be333a0 RBP: 0000000000000060 R08: 0000000000000000 R09: ffffffff822bc679 R10: dffffc0000000000 R11: fffffbfff1f46fc7 R12: dffffc0000000000 R13: ffff8880b873b540 R14: 0000000000000001 R15: ffff88802e213280 FS: 0000000000000000(0000) GS:ffff888125d1c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555877885c8 CR3: 000000000df36000 CR4: 00000000003526f0 Call Trace: percpu_ref_get include/linux/percpu-refcount.h:222 [inline] obj_cgroup_get include/linux/memcontrol.h:772 [inline] refill_obj_stock+0x254/0x850 mm/memcontrol.c:3042 __memcg_slab_free_hook+0x127/0x3d0 mm/memcontrol.c:3216 memcg_slab_free_hook mm/slub.c:2242 [inline] slab_free_bulk mm/slub.c:4698 [inline] kmem_cache_free_bulk+0x46e/0x520 mm/slub.c:5283 kfree_bulk include/linux/slab.h:794 [inline] kvfree_rcu_bulk+0xe5/0x1f0 mm/slab_common.c:1516 kfree_rcu_work+0xed/0x170 mm/slab_common.c:1594 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x70e/0x8a0 kernel/kthread.c:463 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:percpu_ref_get_many+0xa3/0x140 include/linux/percpu-refcount.h:205 Code: bf 71 ff 49 bc 00 00 00 00 00 fc ff df 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 e4 4d f7 ff 49 8b 07 a8 03 75 62 <65> 4c 01 30 e8 d4 97 4d 09 85 c0 74 3a e8 6b 96 7a ff 84 c0 75 31 RSP: 0018:ffffc9000513f7c8 EFLAGS: 00010246 RAX: ffff88802e213300 RBX: ffffffff822bc679 RCX: 5ad12138658b0300 RDX: 0000000000000000 RSI: ffffffff8be333e0 RDI: ffffffff8be333a0 RBP: 0000000000000060 R08: 0000000000000000 R09: ffffffff822bc679 R10: dffffc0000000000 R11: fffffbfff1f46fc7 R12: dffffc0000000000 R13: ffff8880b873b540 R14: 0000000000000001 R15: ffff88802e213280 FS: 0000000000000000(0000) GS:ffff888125d1c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555877885c8 CR3: 000000000df36000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 71 ff jno 0x1 2: 49 bc 00 00 00 00 00 movabs $0xdffffc0000000000,%r12 9: fc ff df c: 4c 89 f8 mov %r15,%rax f: 48 c1 e8 03 shr $0x3,%rax 13: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) 18: 74 08 je 0x22 1a: 4c 89 ff mov %r15,%rdi 1d: e8 e4 4d f7 ff call 0xfff74e06 22: 49 8b 07 mov (%r15),%rax 25: a8 03 test $0x3,%al 27: 75 62 jne 0x8b * 29: 65 4c 01 30 add %r14,%gs:(%rax) <-- trapping instruction 2d: e8 d4 97 4d 09 call 0x94d9806 32: 85 c0 test %eax,%eax 34: 74 3a je 0x70 36: e8 6b 96 7a ff call 0xff7a96a6 3b: 84 c0 test %al,%al 3d: 75 31 jne 0x70