Oops: general protection fault, probably for non-canonical address 0xdffffc001fffc000: 0000 [#1] SMP KASAN PTI KASAN: probably user-memory-access in range [0x00000000fffe0000-0x00000000fffe0007] CPU: 1 UID: 0 PID: 10576 Comm: dhcpcd-run-hook Not tainted 6.16.0-rc3-syzkaller-00122-g60f7f4afaf6d #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 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 80 48 98 8b be 4b 03 00 00 48 c7 c2 c0 48 98 8b e8 54 d7 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 b4 5c f7 ff 49 8b 07 a8 03 75 62 RSP: 0018:ffffc90003387398 EFLAGS: 00010206 RAX: 000000001fffc000 RBX: ffffffff822c74f9 RCX: a58f47a9963bbb00 RDX: 0000000000000000 RSI: ffffffff8be28d20 RDI: ffffffff8be28ce0 RBP: 0000000000000078 R08: 0000000000000000 R09: ffffffff822c74f9 R10: dffffc0000000000 R11: ffffed1004f59294 R12: dffffc0000000000 R13: ffff8880b873b540 R14: 0000000000000001 R15: 00000000fffe0000 FS: 0000000000000000(0000) GS:ffff888125d50000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0124a2c286 CR3: 0000000066bb8000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: percpu_ref_get include/linux/percpu-refcount.h:222 [inline] obj_cgroup_get include/linux/memcontrol.h:770 [inline] refill_obj_stock+0x254/0x850 mm/memcontrol.c:3045 __memcg_slab_free_hook+0x127/0x3d0 mm/memcontrol.c:3219 memcg_slab_free_hook mm/slub.c:2206 [inline] slab_free mm/slub.c:4640 [inline] kmem_cache_free+0x223/0x400 mm/slub.c:4745 anon_vma_chain_free mm/rmap.c:147 [inline] unlink_anon_vmas+0x2cc/0x670 mm/rmap.c:421 free_pgtables+0x7bf/0xaf0 mm/memory.c:402 exit_mmap+0x444/0xb50 mm/mmap.c:1295 __mmput+0x118/0x420 kernel/fork.c:1121 exec_mmap+0x6ac/0x7d0 fs/exec.c:896 begin_new_exec+0x129c/0x2120 fs/exec.c:1151 load_elf_binary+0x96a/0x2790 fs/binfmt_elf.c:995 search_binary_handler fs/exec.c:1665 [inline] exec_binprm fs/exec.c:1697 [inline] bprm_execve+0x99c/0x1450 fs/exec.c:1749 do_execveat_common+0x510/0x6a0 fs/exec.c:1855 do_execve fs/exec.c:1929 [inline] __do_sys_execve fs/exec.c:2005 [inline] __se_sys_execve fs/exec.c:2000 [inline] __x64_sys_execve+0x94/0xb0 fs/exec.c:2000 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: 0033:0x7f0124972107 Code: Unable to access opcode bytes at 0x7f01249720dd. RSP: 002b:00007ffcb4d09dc8 EFLAGS: 00000246 ORIG_RAX: 000000000000003b RAX: ffffffffffffffda RBX: 0000563cbf86f080 RCX: 00007f0124972107 RDX: 0000563cbf86f0a8 RSI: 0000563cbf86f080 RDI: 0000563cbf86f138 RBP: 0000563cbf86f138 R08: 00007ffcb4d0dea9 R09: 0000000000000000 R10: 0000000000000008 R11: 0000000000000246 R12: 0000563cbf86f0a8 R13: 00007f0124b37e8b R14: 0000563cbf86f0a8 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 80 48 98 8b be 4b 03 00 00 48 c7 c2 c0 48 98 8b e8 54 d7 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 b4 5c f7 ff 49 8b 07 a8 03 75 62 RSP: 0018:ffffc90003387398 EFLAGS: 00010206 RAX: 000000001fffc000 RBX: ffffffff822c74f9 RCX: a58f47a9963bbb00 RDX: 0000000000000000 RSI: ffffffff8be28d20 RDI: ffffffff8be28ce0 RBP: 0000000000000078 R08: 0000000000000000 R09: ffffffff822c74f9 R10: dffffc0000000000 R11: ffffed1004f59294 R12: dffffc0000000000 R13: ffff8880b873b540 R14: 0000000000000001 R15: 00000000fffe0000 FS: 0000000000000000(0000) GS:ffff888125d50000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f01249720dd CR3: 0000000066bb8000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 01 48 c7 add %ecx,-0x39(%rax) 3: c7 80 48 98 8b be 4b movl $0x34b,-0x417467b8(%rax) a: 03 00 00 d: 48 c7 c2 c0 48 98 8b mov $0xffffffff8b9848c0,%rdx 14: e8 54 d7 71 ff call 0xff71d76d 19: 49 bc 00 00 00 00 00 movabs $0xdffffc0000000000,%r12 20: fc ff df 23: 4c 89 f8 mov %r15,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 4c 89 ff mov %r15,%rdi 34: e8 b4 5c f7 ff call 0xfff75ced 39: 49 8b 07 mov (%r15),%rax 3c: a8 03 test $0x3,%al 3e: 75 62 jne 0xa2