BUG: unable to handle page fault for address: ffffed1104e2efff #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 23ffef067 P4D 23ffef067 PUD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 5789 Comm: syz.3.123 Not tainted 5.15.185-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:constant_test_bit arch/x86/include/asm/bitops.h:207 [inline] RIP: 0010:test_bit include/asm-generic/bitops/instrumented-non-atomic.h:135 [inline] RIP: 0010:test_ti_thread_flag include/linux/thread_info.h:118 [inline] RIP: 0010:need_resched include/linux/sched.h:2111 [inline] RIP: 0010:preempt_schedule_irq+0xf6/0x150 kernel/sched/core.c:6783 Code: e0 3a d4 f7 bf 01 00 00 00 e8 d6 b6 a7 f7 65 48 8b 1d 6e c6 58 76 48 89 df be 08 00 00 00 e8 61 92 13 f8 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 91 48 89 df e8 bb 90 13 f8 eb 87 48 c7 04 24 0e RSP: 0000:ffffc900033bf9e0 EFLAGS: 00010806 RAX: 1ffff11004e2f000 RBX: ffff888027178000 RCX: ffffffff89a9a95f RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888027178000 RBP: ffffc900033bfa90 R08: dffffc0000000000 R09: ffffed1004e2f001 R10: ffffed1004e2f001 R11: 1ffff11004e2f000 R12: 0000000000000000 R13: 0000000000000000 R14: dffffc00ffffffff R15: 1ffff92000677f3c FS: 00007f81928cd6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed1104e2efff CR3: 00000000227d9000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: irqentry_exit+0x63/0x70 kernel/entry/common.c:432 asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:681 RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline] RIP: 0010:write_comp_data kernel/kcov.c:227 [inline] RIP: 0010:__sanitizer_cov_trace_cmp4+0x32/0x80 kernel/kcov.c:267 Code: 34 ac 8a 7e 65 8b 15 35 ac 8a 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 5b 83 b9 34 16 00 00 00 74 52 8b 91 10 16 00 00 <83> fa 03 75 47 48 8b 91 18 16 00 00 44 8b 89 14 16 00 00 49 c1 e1 RSP: 0000:ffffc900033bfb58 EFLAGS: 00000246 RAX: ffffffff829bca40 RBX: 0000000000000100 RCX: ffff888027178000 RDX: 0000000000000000 RSI: 0000000000000100 RDI: 00000000000000e0 RBP: ffffc900033bfd28 R08: ffff888027178000 R09: 0000000000000002 R10: 00000000000000e0 R11: 0000000000000000 R12: ffff888073992000 R13: 0000000000010000 R14: 00000000000000e0 R15: 0000000000000960 ntfs_fill_super+0x3330/0x3c10 fs/ntfs3/super.c:1173 get_tree_bdev+0x3f1/0x610 fs/super.c:1325 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x24a/0xa40 fs/namespace.c:3010 do_mount fs/namespace.c:3353 [inline] __do_sys_mount fs/namespace.c:3561 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3538 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f819365f10a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 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:00007f81928cce68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f81928ccef0 RCX: 00007f819365f10a RDX: 000020000001f340 RSI: 0000200000000040 RDI: 00007f81928cceb0 RBP: 000020000001f340 R08: 00007f81928ccef0 R09: 0000000000000890 R10: 0000000000000890 R11: 0000000000000246 R12: 0000200000000040 R13: 00007f81928cceb0 R14: 000000000001f331 R15: 0000200000000000 Modules linked in: CR2: ffffed1104e2efff ---[ end trace f8d2568902969e38 ]--- RIP: 0010:constant_test_bit arch/x86/include/asm/bitops.h:207 [inline] RIP: 0010:test_bit include/asm-generic/bitops/instrumented-non-atomic.h:135 [inline] RIP: 0010:test_ti_thread_flag include/linux/thread_info.h:118 [inline] RIP: 0010:need_resched include/linux/sched.h:2111 [inline] RIP: 0010:preempt_schedule_irq+0xf6/0x150 kernel/sched/core.c:6783 Code: e0 3a d4 f7 bf 01 00 00 00 e8 d6 b6 a7 f7 65 48 8b 1d 6e c6 58 76 48 89 df be 08 00 00 00 e8 61 92 13 f8 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 91 48 89 df e8 bb 90 13 f8 eb 87 48 c7 04 24 0e RSP: 0000:ffffc900033bf9e0 EFLAGS: 00010806 RAX: 1ffff11004e2f000 RBX: ffff888027178000 RCX: ffffffff89a9a95f RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888027178000 RBP: ffffc900033bfa90 R08: dffffc0000000000 R09: ffffed1004e2f001 R10: ffffed1004e2f001 R11: 1ffff11004e2f000 R12: 0000000000000000 R13: 0000000000000000 R14: dffffc00ffffffff R15: 1ffff92000677f3c FS: 00007f81928cd6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed1104e2efff CR3: 00000000227d9000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 3a d4 cmp %ah,%dl 2: f7 bf 01 00 00 00 idivl 0x1(%rdi) 8: e8 d6 b6 a7 f7 call 0xf7a7b6e3 d: 65 48 8b 1d 6e c6 58 mov %gs:0x7658c66e(%rip),%rbx # 0x7658c683 14: 76 15: 48 89 df mov %rbx,%rdi 18: be 08 00 00 00 mov $0x8,%esi 1d: e8 61 92 13 f8 call 0xf8139283 22: 48 89 d8 mov %rbx,%rax 25: 48 c1 e8 03 shr $0x3,%rax * 29: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction 2e: 74 91 je 0xffffffc1 30: 48 89 df mov %rbx,%rdi 33: e8 bb 90 13 f8 call 0xf81390f3 38: eb 87 jmp 0xffffffc1 3a: 48 rex.W 3b: c7 .byte 0xc7 3c: 04 24 add $0x24,%al 3e: 0e (bad)