BUG: unable to handle page fault for address: fffffbfff2d7a266 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 23ffe4067 P4D 23ffe4067 PUD 23ffe3067 PMD 0 Oops: Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 PID: 5498 Comm: syz-executor Not tainted 6.10.0-syzkaller-05505-gb1bc554e009e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 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: 0018:ffffc90004df75e0 EFLAGS: 00010086 RAX: 000000000077f101 RBX: 1ffffffff2d7a266 RCX: ffffffff8172a11d RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff96bd1330 RBP: ffffffffffffffff R08: ffffffff96bd1337 R09: 1ffffffff2d7a266 R10: dffffc0000000000 R11: fffffbfff2d7a266 R12: 0000000000000001 R13: ffff888028858000 R14: dffffc0000000001 R15: fffffbfff2d7a267 FS: 000055558e652500(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffbfff2d7a266 CR3: 000000006dfd4000 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+0xc5d/0x1fd0 kernel/locking/lockdep.c:5106 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5753 _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378 raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:560 _double_lock_balance kernel/sched/sched.h:2760 [inline] double_lock_balance kernel/sched/sched.h:2805 [inline] find_lock_lowest_rq+0x1e1/0x670 kernel/sched/rt.c:1941 push_rt_task+0x13f/0x7e0 kernel/sched/rt.c:2074 push_rt_tasks kernel/sched/rt.c:2124 [inline] task_woken_rt+0x14c/0x220 kernel/sched/rt.c:2424 ttwu_do_activate+0x338/0x7e0 kernel/sched/core.c:3594 ttwu_queue kernel/sched/core.c:3846 [inline] try_to_wake_up+0x884/0x1470 kernel/sched/core.c:4167 signal_wake_up_state+0xb4/0x120 kernel/signal.c:773 signal_wake_up include/linux/sched/signal.h:448 [inline] complete_signal+0xb36/0xcf0 kernel/signal.c:1055 __send_signal_locked+0xb1b/0xdc0 kernel/signal.c:1185 do_send_sig_info kernel/signal.c:1301 [inline] group_send_sig_info+0x292/0x310 kernel/signal.c:1451 __kill_pgrp_info kernel/signal.c:1467 [inline] kill_something_info kernel/signal.c:1617 [inline] __do_sys_kill kernel/signal.c:3838 [inline] __se_sys_kill+0x431/0x5d0 kernel/signal.c:3832 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f251ef116b7 Code: 48 83 c4 08 c3 66 0f 1f 44 00 00 48 c7 c2 a8 ff ff ff 64 89 02 b8 ff ff ff ff eb e4 0f 1f 80 00 00 00 00 b8 3e 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffea7d12db8 EFLAGS: 00000293 ORIG_RAX: 000000000000003e RAX: ffffffffffffffda RBX: 0000000000000209 RCX: 00007f251ef116b7 RDX: 0000000000000563 RSI: 0000000000000009 RDI: 00000000fffffdf7 RBP: 00007ffea7d12e0c R08: 0000000021877ef1 R09: 7fffffffffffffff R10: 00007f251fd820b8 R11: 0000000000000293 R12: 00007ffea7d12e80 R13: 0000000000000064 R14: 0000000000055bcf R15: 0000000000055576 Modules linked in: CR2: fffffbfff2d7a266 ---[ 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: 0018:ffffc90004df75e0 EFLAGS: 00010086 RAX: 000000000077f101 RBX: 1ffffffff2d7a266 RCX: ffffffff8172a11d RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff96bd1330 RBP: ffffffffffffffff R08: ffffffff96bd1337 R09: 1ffffffff2d7a266 R10: dffffc0000000000 R11: fffffbfff2d7a266 R12: 0000000000000001 R13: ffff888028858000 R14: dffffc0000000001 R15: fffffbfff2d7a267 FS: 000055558e652500(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffbfff2d7a266 CR3: 000000006dfd4000 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)