Oops: general protection fault, probably for non-canonical address 0xdffffc001fff8000: 0000 [#1] SMP KASAN PTI KASAN: probably user-memory-access in range [0x00000000fffc0000-0x00000000fffc0007] CPU: 1 UID: 0 PID: 29476 Comm: dhcpcd-run-hook Not tainted 6.16.0-syzkaller-12108-gc04fdca8a98a #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:__ref_is_percpu include/linux/percpu-refcount.h:174 [inline] RIP: 0010:percpu_ref_get_many+0x8d/0x140 include/linux/percpu-refcount.h:204 Code: 01 48 c7 c7 a0 4c 98 8b be 4b 03 00 00 48 c7 c2 e0 4c 98 8b e8 a4 bd 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 d4 4d f7 ff 49 8b 07 a8 03 75 62 RSP: 0018:ffffc90002e67398 EFLAGS: 00010206 RAX: 000000001fff8000 RBX: ffffffff822bc7f9 RCX: 9b58bef2986df800 RDX: 0000000000000000 RSI: ffffffff8be32660 RDI: ffffffff8be32620 RBP: 0000000000000078 R08: 0000000000000000 R09: ffffffff822bc7f9 R10: dffffc0000000000 R11: fffffbfff1f468c7 R12: dffffc0000000000 R13: ffff8880b873b540 R14: 0000000000000001 R15: 00000000fffc0000 FS: 0000000000000000(0000) GS:ffff888125d21000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f53cb93b6b0 CR3: 0000000023cda000 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 mm/slub.c:4677 [inline] kmem_cache_free+0x223/0x400 mm/slub.c:4782 anon_vma_chain_free mm/rmap.c:147 [inline] unlink_anon_vmas+0x2cc/0x670 mm/rmap.c:421 free_pgtables+0x72b/0x9c0 mm/memory.c:413 exit_mmap+0x444/0xb50 mm/mmap.c:1291 __mmput+0x118/0x430 kernel/fork.c:1129 exec_mmap+0x6ac/0x7d0 fs/exec.c:901 begin_new_exec+0x129c/0x2120 fs/exec.c:1156 load_elf_binary+0x998/0x2740 fs/binfmt_elf.c:995 search_binary_handler fs/exec.c:1670 [inline] exec_binprm fs/exec.c:1702 [inline] bprm_execve+0x999/0x1450 fs/exec.c:1754 do_execveat_common+0x510/0x6a0 fs/exec.c:1860 do_execve fs/exec.c:1934 [inline] __do_sys_execve fs/exec.c:2010 [inline] __se_sys_execve fs/exec.c:2005 [inline] __x64_sys_execve+0x94/0xb0 fs/exec.c:2005 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f77765a2107 Code: Unable to access opcode bytes at 0x7f77765a20dd. RSP: 002b:00007ffc6ff802b8 EFLAGS: 00000246 ORIG_RAX: 000000000000003b RAX: ffffffffffffffda RBX: 000056385fcea0a8 RCX: 00007f77765a2107 RDX: 000056385fcea0d0 RSI: 000056385fcea0a8 RDI: 000056385fcea168 RBP: 000056385fcea168 R08: 00007ffc6ff84e77 R09: 0000000000000000 R10: 0000000000000008 R11: 0000000000000246 R12: 000056385fcea0d0 R13: 00007f7776767e8b R14: 000056385fcea0d0 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__ref_is_percpu include/linux/percpu-refcount.h:174 [inline] RIP: 0010:percpu_ref_get_many+0x8d/0x140 include/linux/percpu-refcount.h:204 Code: 01 48 c7 c7 a0 4c 98 8b be 4b 03 00 00 48 c7 c2 e0 4c 98 8b e8 a4 bd 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 d4 4d f7 ff 49 8b 07 a8 03 75 62 RSP: 0018:ffffc90002e67398 EFLAGS: 00010206 RAX: 000000001fff8000 RBX: ffffffff822bc7f9 RCX: 9b58bef2986df800 RDX: 0000000000000000 RSI: ffffffff8be32660 RDI: ffffffff8be32620 RBP: 0000000000000078 R08: 0000000000000000 R09: ffffffff822bc7f9 R10: dffffc0000000000 R11: fffffbfff1f468c7 R12: dffffc0000000000 R13: ffff8880b873b540 R14: 0000000000000001 R15: 00000000fffc0000 FS: 0000000000000000(0000) GS:ffff888125d21000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f77765a20dd CR3: 0000000023cda000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 48 c7 c7 a0 4c 98 8b mov $0xffffffff8b984ca0,%rdi 7: be 4b 03 00 00 mov $0x34b,%esi c: 48 c7 c2 e0 4c 98 8b mov $0xffffffff8b984ce0,%rdx 13: e8 a4 bd 71 ff call 0xff71bdbc 18: 49 bc 00 00 00 00 00 movabs $0xdffffc0000000000,%r12 1f: fc ff df 22: 4c 89 f8 mov %r15,%rax 25: 48 c1 e8 03 shr $0x3,%rax * 29: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 4c 89 ff mov %r15,%rdi 33: e8 d4 4d f7 ff call 0xfff74e0c 38: 49 8b 07 mov (%r15),%rax 3b: a8 03 test $0x3,%al 3d: 75 62 jne 0xa1