BUG: unable to handle page fault for address: fffffbfff41e56ad #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 23ffe4067 P4D 23ffe4067 PUD 23ffe3067 PMD 141e92067 PTE 0 Oops: Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 14989 Comm: syz.1.1251 Not tainted 6.11.0-syzkaller-10045-g97d8894b6f4c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:87 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:104 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline] RIP: 0010:kasan_check_range+0x82/0x290 mm/kasan/generic.c:189 Code: 01 00 00 00 00 fc ff df 4f 8d 3c 31 4c 89 fd 4c 29 dd 48 83 fd 10 7f 29 48 85 ed 0f 84 3e 01 00 00 4c 89 cd 48 f7 d5 48 01 dd <41> 80 3b 00 0f 85 c9 01 00 00 49 ff c3 48 ff c5 75 ee e9 1e 01 00 RSP: 0000:ffffc90003257a20 EFLAGS: 00010086 RAX: 0000000001999501 RBX: 1ffffffff41e56ad RCX: ffffffff8170287b RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffffa0f2b568 RBP: ffffffffffffffff R08: ffffffffa0f2b56f R09: 1ffffffff41e56ad R10: dffffc0000000000 R11: fffffbfff41e56ad R12: ffff88802784bc00 R13: ffff88802784c6d8 R14: dffffc0000000001 R15: fffffbfff41e56ae FS: 00005555657dc500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffbfff41e56ad CR3: 0000000065f42000 CR4: 0000000000350ef0 Call Trace: instrument_atomic_read include/linux/instrumented.h:68 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] __lock_acquire+0xc8b/0x2050 kernel/locking/lockdep.c:5169 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5822 _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378 raw_spin_rq_lock_nested+0xb0/0x140 kernel/sched/core.c:601 raw_spin_rq_lock kernel/sched/sched.h:1503 [inline] rq_lock kernel/sched/sched.h:1802 [inline] __schedule+0x357/0x4b30 kernel/sched/core.c:6575 __schedule_loop kernel/sched/core.c:6751 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6766 exit_to_user_mode_loop kernel/entry/common.c:102 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] irqentry_exit_to_user_mode+0xe7/0x280 kernel/entry/common.c:231 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707 RIP: 0033:0x7f0fc7c5c9bf Code: ee b0 2d 00 00 4d 89 cc 4c 89 ca 74 28 25 ff 0f 00 00 83 f0 3d 8d 04 c0 89 c2 c1 ea 04 31 c2 69 d2 2d eb d4 27 89 d0 c1 e8 0f <31> c2 81 e2 ff 0f 00 00 4c 31 ca 80 3d 77 56 2d 00 00 0f 84 a9 00 RSP: 002b:00007ffd2b63c6a0 EFLAGS: 00000217 RAX: 000000000001c395 RBX: 00007f0fc8a65720 RCX: ffffffff8476dd71 RDX: 00000000e1cafddf RSI: ffffffff8476dd71 RDI: 00007f0fc7001000 RBP: 0000000000000000 R08: 00007f0fc7f20000 R09: ffffffff8476e043 R10: 000000008476dd75 R11: 0000000000000008 R12: ffffffff8476e043 R13: 00007f0fc7f360f0 R14: 0000000000000008 R15: 00000000000073ea Modules linked in: CR2: fffffbfff41e56ad ---[ end trace 0000000000000000 ]--- RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:87 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:104 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline] RIP: 0010:kasan_check_range+0x82/0x290 mm/kasan/generic.c:189 Code: 01 00 00 00 00 fc ff df 4f 8d 3c 31 4c 89 fd 4c 29 dd 48 83 fd 10 7f 29 48 85 ed 0f 84 3e 01 00 00 4c 89 cd 48 f7 d5 48 01 dd <41> 80 3b 00 0f 85 c9 01 00 00 49 ff c3 48 ff c5 75 ee e9 1e 01 00 RSP: 0000:ffffc90003257a20 EFLAGS: 00010086 RAX: 0000000001999501 RBX: 1ffffffff41e56ad RCX: ffffffff8170287b RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffffa0f2b568 RBP: ffffffffffffffff R08: ffffffffa0f2b56f R09: 1ffffffff41e56ad R10: dffffc0000000000 R11: fffffbfff41e56ad R12: ffff88802784bc00 R13: ffff88802784c6d8 R14: dffffc0000000001 R15: fffffbfff41e56ae FS: 00005555657dc500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffbfff41e56ad CR3: 0000000065f42000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess), 7 bytes skipped: 0: df 4f 8d fisttps -0x73(%rdi) 3: 3c 31 cmp $0x31,%al 5: 4c 89 fd mov %r15,%rbp 8: 4c 29 dd sub %r11,%rbp b: 48 83 fd 10 cmp $0x10,%rbp f: 7f 29 jg 0x3a 11: 48 85 ed test %rbp,%rbp 14: 0f 84 3e 01 00 00 je 0x158 1a: 4c 89 cd mov %r9,%rbp 1d: 48 f7 d5 not %rbp 20: 48 01 dd add %rbx,%rbp * 23: 41 80 3b 00 cmpb $0x0,(%r11) <-- trapping instruction 27: 0f 85 c9 01 00 00 jne 0x1f6 2d: 49 ff c3 inc %r11 30: 48 ff c5 inc %rbp 33: 75 ee jne 0x23 35: e9 .byte 0xe9 36: 1e (bad) 37: 01 00 add %eax,(%rax)