================================================================== BUG: KASAN: wild-memory-access in instrument_atomic_read include/linux/instrumented.h:71 [inline] BUG: KASAN: wild-memory-access in atomic_read include/asm-generic/atomic-instrumented.h:27 [inline] BUG: KASAN: wild-memory-access in lock_page_memcg+0xa6/0x1c0 mm/memcontrol.c:2153 Read of size 4 at addr 00ff8881001469c0 by task syz.7.3387/13421 CPU: 1 PID: 13421 Comm: syz.7.3387 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: __dump_stack+0x21/0x24 lib/dump_stack.c:77 dump_stack_lvl+0x169/0x1d8 lib/dump_stack.c:118 __kasan_report mm/kasan/report.c:439 [inline] kasan_report+0xd8/0x130 mm/kasan/report.c:452 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x280/0x290 mm/kasan/generic.c:189 __kasan_check_read+0x11/0x20 mm/kasan/shadow.c:31 instrument_atomic_read include/linux/instrumented.h:71 [inline] atomic_read include/asm-generic/atomic-instrumented.h:27 [inline] lock_page_memcg+0xa6/0x1c0 mm/memcontrol.c:2153 page_remove_rmap+0x2e/0xe70 mm/rmap.c:1346 zap_pte_range mm/memory.c:1315 [inline] zap_pmd_range mm/memory.c:1435 [inline] zap_pud_range mm/memory.c:1464 [inline] zap_p4d_range mm/memory.c:1485 [inline] unmap_page_range+0x103c/0x20c0 mm/memory.c:1506 unmap_single_vma mm/memory.c:1551 [inline] unmap_vmas+0x248/0x340 mm/memory.c:1583 exit_mmap+0x2dc/0x540 mm/mmap.c:3385 __mmput+0x93/0x2f0 kernel/fork.c:1153 mmput+0x4e/0x150 kernel/fork.c:1176 exit_mm kernel/exit.c:539 [inline] do_exit+0x9ae/0x2480 kernel/exit.c:859 do_group_exit+0x141/0x310 kernel/exit.c:986 get_signal+0xf7d/0x12e0 kernel/signal.c:2793 arch_do_signal_or_restart+0xbf/0x10f0 arch/x86/kernel/signal.c:805 handle_signal_work kernel/entry/common.c:145 [inline] exit_to_user_mode_loop+0xa2/0xe0 kernel/entry/common.c:169 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:199 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:274 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f96002f4749 Code: Unable to access opcode bytes at RIP 0x7f96002f471f. RSP: 002b:00007f95fed3b0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f960054b098 RCX: 00007f96002f4749 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f960054b098 RBP: 00007f960054b090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f960054b128 R14: 00007ffed3dd5c60 R15: 00007ffed3dd5d48 ================================================================== general protection fault, probably for non-canonical address 0xe01fed1020028d38: 0000 [#1] PREEMPT SMP KASAN KASAN: maybe wild-memory-access in range [0x00ff8881001469c0-0x00ff8881001469c7] CPU: 1 PID: 13421 Comm: syz.7.3387 Tainted: G B W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:29 [inline] RIP: 0010:atomic_read include/asm-generic/atomic-instrumented.h:28 [inline] RIP: 0010:lock_page_memcg+0xb7/0x1c0 mm/memcontrol.c:2153 Code: 00 00 49 89 c6 4c 8d b8 c0 09 00 00 4c 89 ff be 04 00 00 00 e8 6a e3 fc ff 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 75 69 41 83 3f 00 0f 8e d1 00 00 00 4d 8d a6 d0 RSP: 0018:ffffc90002067510 EFLAGS: 00010202 RAX: 001ff11020028d38 RBX: ffffea0004b46ff8 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00000000ffffffff RBP: ffffc90002067538 R08: 0000000000000004 R09: 0000000000000003 R10: fffffbfff0d8f048 R11: 1ffffffff0d8f048 R12: 0000000000000001 R13: 1ffffd4000968dff R14: 00ff888100146000 R15: 00ff8881001469c0 FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000000a000 CR3: 000000000620f000 CR4: 00000000003526a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: page_remove_rmap+0x2e/0xe70 mm/rmap.c:1346 zap_pte_range mm/memory.c:1315 [inline] zap_pmd_range mm/memory.c:1435 [inline] zap_pud_range mm/memory.c:1464 [inline] zap_p4d_range mm/memory.c:1485 [inline] unmap_page_range+0x103c/0x20c0 mm/memory.c:1506 unmap_single_vma mm/memory.c:1551 [inline] unmap_vmas+0x248/0x340 mm/memory.c:1583 exit_mmap+0x2dc/0x540 mm/mmap.c:3385 __mmput+0x93/0x2f0 kernel/fork.c:1153 mmput+0x4e/0x150 kernel/fork.c:1176 exit_mm kernel/exit.c:539 [inline] do_exit+0x9ae/0x2480 kernel/exit.c:859 do_group_exit+0x141/0x310 kernel/exit.c:986 get_signal+0xf7d/0x12e0 kernel/signal.c:2793 arch_do_signal_or_restart+0xbf/0x10f0 arch/x86/kernel/signal.c:805 handle_signal_work kernel/entry/common.c:145 [inline] exit_to_user_mode_loop+0xa2/0xe0 kernel/entry/common.c:169 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:199 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:274 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f96002f4749 Code: Unable to access opcode bytes at RIP 0x7f96002f471f. RSP: 002b:00007f95fed3b0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f960054b098 RCX: 00007f96002f4749 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f960054b098 RBP: 00007f960054b090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f960054b128 R14: 00007ffed3dd5c60 R15: 00007ffed3dd5d48 Modules linked in: ---[ end trace 80d0c36759629f54 ]--- RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:29 [inline] RIP: 0010:atomic_read include/asm-generic/atomic-instrumented.h:28 [inline] RIP: 0010:lock_page_memcg+0xb7/0x1c0 mm/memcontrol.c:2153 Code: 00 00 49 89 c6 4c 8d b8 c0 09 00 00 4c 89 ff be 04 00 00 00 e8 6a e3 fc ff 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 75 69 41 83 3f 00 0f 8e d1 00 00 00 4d 8d a6 d0 RSP: 0018:ffffc90002067510 EFLAGS: 00010202 RAX: 001ff11020028d38 RBX: ffffea0004b46ff8 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00000000ffffffff RBP: ffffc90002067538 R08: 0000000000000004 R09: 0000000000000003 R10: fffffbfff0d8f048 R11: 1ffffffff0d8f048 R12: 0000000000000001 R13: 1ffffd4000968dff R14: 00ff888100146000 R15: 00ff8881001469c0 FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000000a000 CR3: 000000000620f000 CR4: 00000000003526a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 49 89 c6 mov %rax,%r14 5: 4c 8d b8 c0 09 00 00 lea 0x9c0(%rax),%r15 c: 4c 89 ff mov %r15,%rdi f: be 04 00 00 00 mov $0x4,%esi 14: e8 6a e3 fc ff call 0xfffce383 19: 4c 89 f8 mov %r15,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 27: fc ff df * 2a: 0f b6 04 08 movzbl (%rax,%rcx,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 75 69 jne 0x9b 32: 41 83 3f 00 cmpl $0x0,(%r15) 36: 0f 8e d1 00 00 00 jle 0x10d 3c: 4d rex.WRB 3d: 8d .byte 0x8d 3e: a6 cmpsb %es:(%rdi),%ds:(%rsi) 3f: d0 .byte 0xd0