loop6: detected capacity change from 0 to 264192 loop7: detected capacity change from 0 to 40 syz-executor.5 (7514) used greatest stack depth: 23728 bytes left loop7: detected capacity change from 0 to 40 BUG: unable to handle page fault for address: ffffed100fffc000 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD 7ffd3067 P4D 7ffd3067 PUD 7ffd2067 PMD 7ffd1067 PTE 0 Oops: 0002 [#1] PREEMPT SMP KASAN NOPTI CPU: 1 PID: 7532 Comm: syz-executor.4 Not tainted 6.1.0-rc3-next-20221031 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__memset+0x24/0x50 Code: 90 90 90 90 90 90 0f 1f 44 00 00 49 89 f9 48 89 d1 83 e2 07 48 c1 e9 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 <f3> 48 ab 89 d1 f3 aa 4c 89 c8 e9 4d d4 12 00 66 66 2e 0f 1f 84 00 RSP: 0018:ffff888013ce7cc0 EFLAGS: 00010216 RAX: 0000000000000000 RBX: ffff88800bed50c0 RCX: 1ffffe21fe5f9f6b RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffed100fffc000 RBP: ffff88800bf88a00 R08: 0000000000000005 R09: ffffed10017daa18 R10: 0000000000000001 R11: 0000000000000001 R12: ffff88800bf88a00 R13: ffff88800bed50c0 R14: ffffffff815f27a0 R15: 1ffff1100112301f FS: 00007f5236865700(0000) GS:ffff88806d100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed100fffc000 CR3: 000000001379e000 CR4: 0000000000350ee0 Call Trace: <TASK> kasan_unpoison+0x23/0x60 mempool_exit+0x1c2/0x330 bioset_exit+0x2c9/0x630 disk_release+0x143/0x490 device_release+0xa2/0x250 kobject_put+0x173/0x280 put_device+0x1b/0x40 put_disk+0x41/0x60 loop_control_ioctl+0x4d1/0x630 __x64_sys_ioctl+0x19a/0x220 do_syscall_64+0x3b/0xa0 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f5239310b19 Code: ff ff c3 66 2e 0f 1f 84 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 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5236865188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f5239424020 RCX: 00007f5239310b19 RDX: 0000000000000000 RSI: 0000000000004c81 RDI: 0000000000000008 RBP: 00007f523936af6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd86f32eff R14: 00007f5236865300 R15: 0000000000022000 </TASK> Modules linked in: CR2: ffffed100fffc000 ---[ end trace 0000000000000000 ]--- RIP: 0010:__memset+0x24/0x50 Code: 90 90 90 90 90 90 0f 1f 44 00 00 49 89 f9 48 89 d1 83 e2 07 48 c1 e9 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 <f3> 48 ab 89 d1 f3 aa 4c 89 c8 e9 4d d4 12 00 66 66 2e 0f 1f 84 00 RSP: 0018:ffff888013ce7cc0 EFLAGS: 00010216 RAX: 0000000000000000 RBX: ffff88800bed50c0 RCX: 1ffffe21fe5f9f6b RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffed100fffc000 RBP: ffff88800bf88a00 R08: 0000000000000005 R09: ffffed10017daa18 R10: 0000000000000001 R11: 0000000000000001 R12: ffff88800bf88a00 R13: ffff88800bed50c0 R14: ffffffff815f27a0 R15: 1ffff1100112301f FS: 00007f5236865700(0000) GS:ffff88806d100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed100fffc000 CR3: 000000001379e000 CR4: 0000000000350ee0 BUG: unable to handle page fault for address: ffffed100fffc000 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD 7ffd3067 P4D 7ffd3067 PUD 7ffd2067 PMD 7ffd1067 PTE 0 Oops: 0002 [#2] PREEMPT SMP KASAN NOPTI CPU: 1 PID: 7528 Comm: syz-executor.4 Tainted: G D 6.1.0-rc3-next-20221031 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__memset+0x24/0x50 Code: 90 90 90 90 90 90 0f 1f 44 00 00 49 89 f9 48 89 d1 83 e2 07 48 c1 e9 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 <f3> 48 ab 89 d1 f3 aa 4c 89 c8 e9 4d d4 12 00 66 66 2e 0f 1f 84 00 RSP: 0018:ffff888042757cc0 EFLAGS: 00010216 RAX: 0000000000000000 RBX: ffff88800bed5240 RCX: 1ffffe21fe5f9f71 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffed100fffc000 RBP: ffff88800bf88a00 R08: 0000000000000005 R09: ffffed10017daa48 R10: 0000000000000001 R11: 0000000000000001 R12: ffff88800bf88a00 R13: ffff88800bed5240 R14: ffffffff815f27a0 R15: 1ffff1100119941f FS: 00007f5236886700(0000) GS:ffff88806d100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed100fffc000 CR3: 000000001379e000 CR4: 0000000000350ee0 Call Trace: <TASK> kasan_unpoison+0x23/0x60 mempool_exit+0x1c2/0x330 bioset_exit+0x2c9/0x630 disk_release+0x143/0x490 device_release+0xa2/0x250 kobject_put+0x173/0x280 put_device+0x1b/0x40 put_disk+0x41/0x60 loop_control_ioctl+0x4d1/0x630 __x64_sys_ioctl+0x19a/0x220 do_syscall_64+0x3b/0xa0 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f5239310b19 Code: ff ff c3 66 2e 0f 1f 84 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 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5236886188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f5239423f60 RCX: 00007f5239310b19 RDX: 0000000000000001 RSI: 0000000000004c81 RDI: 0000000000000008 RBP: 00007f523936af6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd86f32eff R14: 00007f5236886300 R15: 0000000000022000 </TASK> Modules linked in: CR2: ffffed100fffc000 ---[ end trace 0000000000000000 ]--- RIP: 0010:__memset+0x24/0x50 Code: 90 90 90 90 90 90 0f 1f 44 00 00 49 89 f9 48 89 d1 83 e2 07 48 c1 e9 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 <f3> 48 ab 89 d1 f3 aa 4c 89 c8 e9 4d d4 12 00 66 66 2e 0f 1f 84 00 RSP: 0018:ffff888013ce7cc0 EFLAGS: 00010216 RAX: 0000000000000000 RBX: ffff88800bed50c0 RCX: 1ffffe21fe5f9f6b RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffed100fffc000 RBP: ffff88800bf88a00 R08: 0000000000000005 R09: ffffed10017daa18 R10: 0000000000000001 R11: 0000000000000001 R12: ffff88800bf88a00 R13: ffff88800bed50c0 R14: ffffffff815f27a0 R15: 1ffff1100112301f FS: 00007f5236886700(0000) GS:ffff88806d100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed100fffc000 CR3: 000000001379e000 CR4: 0000000000350ee0 ---------------- Code disassembly (best guess): 0: 90 nop 1: 90 nop 2: 90 nop 3: 90 nop 4: 90 nop 5: 90 nop 6: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) b: 49 89 f9 mov %rdi,%r9 e: 48 89 d1 mov %rdx,%rcx 11: 83 e2 07 and $0x7,%edx 14: 48 c1 e9 03 shr $0x3,%rcx 18: 40 0f b6 f6 movzbl %sil,%esi 1c: 48 b8 01 01 01 01 01 movabs $0x101010101010101,%rax 23: 01 01 01 26: 48 0f af c6 imul %rsi,%rax * 2a: f3 48 ab rep stos %rax,%es:(%rdi) <-- trapping instruction 2d: 89 d1 mov %edx,%ecx 2f: f3 aa rep stos %al,%es:(%rdi) 31: 4c 89 c8 mov %r9,%rax 34: e9 4d d4 12 00 jmpq 0x12d486 39: 66 data16 3a: 66 data16 3b: 2e cs 3c: 0f .byte 0xf 3d: 1f (bad) 3e: 84 00 test %al,(%rax)