================================================================== 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 00ff8881280e89c0 by task syz.6.6812/25615 CPU: 1 PID: 25615 Comm: syz.6.6812 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_add_file_rmap+0x2e/0x5d0 mm/rmap.c:1224 do_set_pte+0x365/0x460 mm/memory.c:4196 filemap_map_pages+0x5dd/0x1270 mm/filemap.c:3065 do_fault_around mm/memory.c:4378 [inline] do_read_fault mm/memory.c:4393 [inline] do_fault mm/memory.c:4527 [inline] handle_pte_fault+0x1ae5/0x3750 mm/memory.c:4791 __handle_mm_fault mm/memory.c:4944 [inline] handle_mm_fault+0xf3f/0x16a0 mm/memory.c:5358 faultin_page mm/gup.c:902 [inline] __get_user_pages+0xbe9/0x13e0 mm/gup.c:1121 __get_user_pages_locked mm/gup.c:1307 [inline] get_dump_page+0x169/0x5b0 mm/gup.c:1586 dump_user_range+0x3c/0x1a0 fs/coredump.c:904 elf_core_dump+0x278a/0x2bc0 fs/binfmt_elf.c:2290 do_coredump+0x1ac9/0x27f0 fs/coredump.c:817 get_signal+0xf23/0x12e0 kernel/signal.c:2779 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 irqentry_exit_to_user_mode+0x9/0x10 kernel/entry/common.c:287 irqentry_exit+0x12/0x60 kernel/entry/common.c:375 exc_page_fault+0x67/0xc0 arch/x86/mm/fault.c:1487 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:571 RIP: 0033:0x7f1929209751 Code: 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 48 3d 01 f0 ff ff 73 01 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f RSP: 002b:00000000fffffe10 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f1929460090 RCX: 00007f1929209749 RDX: 0000000000000000 RSI: 00000000fffffe10 RDI: 0000000000000000 RBP: 00007f192928df91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f1929460128 R14: 00007f1929460090 R15: 00007ffceef7c5f8 ================================================================== general protection fault, probably for non-canonical address 0xe01fed102501d138: 0000 [#1] PREEMPT SMP KASAN KASAN: maybe wild-memory-access in range [0x00ff8881280e89c0-0x00ff8881280e89c7] CPU: 1 PID: 25615 Comm: syz.6.6812 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:ffffc900014bed48 EFLAGS: 00010202 RAX: 001ff1102501d138 RBX: ffffea0004dd2ff8 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 00000000ffffffff RBP: ffffc900014bed70 R08: 0000000000000004 R09: 0000000000000003 R10: fffffbfff0d8f048 R11: 1ffffffff0d8f048 R12: dffffc0000000000 R13: 1ffffd40009ba5ff R14: 00ff8881280e8000 R15: 00ff8881280e89c0 FS: 00007f1927c506c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f78d6e9fc00 CR3: 0000000153a8f000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: page_add_file_rmap+0x2e/0x5d0 mm/rmap.c:1224 do_set_pte+0x365/0x460 mm/memory.c:4196 filemap_map_pages+0x5dd/0x1270 mm/filemap.c:3065 do_fault_around mm/memory.c:4378 [inline] do_read_fault mm/memory.c:4393 [inline] do_fault mm/memory.c:4527 [inline] handle_pte_fault+0x1ae5/0x3750 mm/memory.c:4791 __handle_mm_fault mm/memory.c:4944 [inline] handle_mm_fault+0xf3f/0x16a0 mm/memory.c:5358 faultin_page mm/gup.c:902 [inline] __get_user_pages+0xbe9/0x13e0 mm/gup.c:1121 __get_user_pages_locked mm/gup.c:1307 [inline] get_dump_page+0x169/0x5b0 mm/gup.c:1586 dump_user_range+0x3c/0x1a0 fs/coredump.c:904 elf_core_dump+0x278a/0x2bc0 fs/binfmt_elf.c:2290 do_coredump+0x1ac9/0x27f0 fs/coredump.c:817 get_signal+0xf23/0x12e0 kernel/signal.c:2779 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 irqentry_exit_to_user_mode+0x9/0x10 kernel/entry/common.c:287 irqentry_exit+0x12/0x60 kernel/entry/common.c:375 exc_page_fault+0x67/0xc0 arch/x86/mm/fault.c:1487 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:571 RIP: 0033:0x7f1929209751 Code: 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 48 3d 01 f0 ff ff 73 01 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f RSP: 002b:00000000fffffe10 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f1929460090 RCX: 00007f1929209749 RDX: 0000000000000000 RSI: 00000000fffffe10 RDI: 0000000000000000 RBP: 00007f192928df91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f1929460128 R14: 00007f1929460090 R15: 00007ffceef7c5f8 Modules linked in: ---[ end trace ade92f9e895eef38 ]--- 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:ffffc900014bed48 EFLAGS: 00010202 RAX: 001ff1102501d138 RBX: ffffea0004dd2ff8 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 00000000ffffffff RBP: ffffc900014bed70 R08: 0000000000000004 R09: 0000000000000003 R10: fffffbfff0d8f048 R11: 1ffffffff0d8f048 R12: dffffc0000000000 R13: 1ffffd40009ba5ff R14: 00ff8881280e8000 R15: 00ff8881280e89c0 FS: 00007f1927c506c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f78d6e9fc00 CR3: 0000000153a8f000 CR4: 00000000003506a0 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