syzkaller login: [ 26.167498] BUG: Bad rss-counter state mm:00000000daf86811 type:MM_FILEPAGES val:33 [ 26.168517] BUG: Bad rss-counter state mm:00000000daf86811 type:MM_ANONPAGES val:22 [ 26.219817] ================================================================== [ 26.220914] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.222121] Read of size 8 at addr ffff88800e0bd6b0 by task sshd/218 [ 26.223165] [ 26.223392] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.224272] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.225313] Call Trace: [ 26.225647] [ 26.225939] dump_stack_lvl+0x91/0xf0 [ 26.226441] print_report+0xcc/0x620 [ 26.226948] ? __virt_addr_valid+0x102/0x340 [ 26.227521] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.228151] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.228780] kasan_report+0xbe/0xf0 [ 26.229301] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.229947] vma_interval_tree_remove+0xc75/0xec0 [ 26.230582] vma_prepare+0xc54/0x11a0 [ 26.231107] __split_vma+0x5af/0x950 [ 26.231611] ? __pfx___split_vma+0x10/0x10 [ 26.232169] ? find_held_lock+0x2c/0x110 [ 26.232714] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.233342] ? lock_is_held_type+0x9f/0x120 [ 26.233903] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.234551] ? mtree_range_walk+0x632/0x900 [ 26.235136] ? mas_walk+0x5c7/0x7c0 [ 26.235635] do_vmi_munmap+0x1f1/0x2b0 [ 26.236148] mmap_region+0x1f9/0x2660 [ 26.236669] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.237195] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.237948] ? __pfx_lock_acquire+0x10/0x10 [ 26.238539] ? __pfx_mmap_region+0x10/0x10 [ 26.239105] ? security_mmap_addr+0x7d/0xa0 [ 26.239657] ? get_unmapped_area+0x1f5/0x3f0 [ 26.240228] do_mmap+0x854/0xf00 [ 26.240680] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.241199] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.241778] ksys_mmap_pgoff+0x3af/0x500 [ 26.242335] do_syscall_64+0x3f/0x90 [ 26.242872] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.243536] RIP: 0033:0x7f1696e87d82 [ 26.244011] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 26.246249] RSP: 002b:00007ffd0f539c28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.247197] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1696e87d82 [ 26.248092] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f16962c1000 [ 26.248948] RBP: 00007f16962c1000 R08: 0000000000000009 R09: 0000000000001000 [ 26.249819] R10: 0000000000000812 R11: 0000000000000206 R12: 000056516ac75d90 [ 26.250761] R13: 00007ffd0f539c40 R14: 00007ffd0f539c70 R15: 00007ffd0f539fd0 [ 26.251655] [ 26.251957] [ 26.252179] Allocated by task 211: [ 26.252633] kasan_save_stack+0x22/0x50 [ 26.253153] kasan_set_track+0x25/0x30 [ 26.253670] __kasan_slab_alloc+0x59/0x70 [ 26.254264] kmem_cache_alloc+0x16b/0x370 [ 26.254837] vm_area_dup+0x20/0x160 [ 26.255312] __split_vma+0x170/0x950 [ 26.255794] split_vma+0xc6/0x110 [ 26.256246] mprotect_fixup+0x8d2/0xb30 [ 26.256775] do_mprotect_pkey+0x87e/0xd40 [ 26.257322] __x64_sys_mprotect+0x78/0xc0 [ 26.257860] do_syscall_64+0x3f/0x90 [ 26.258372] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.259045] [ 26.259268] Freed by task 202: [ 26.259670] kasan_save_stack+0x22/0x50 [ 26.260208] kasan_set_track+0x25/0x30 [ 26.260714] kasan_save_free_info+0x2b/0x50 [ 26.261258] __kasan_slab_free+0x10a/0x190 [ 26.261805] kmem_cache_free+0x10d/0x4d0 [ 26.262335] rcu_core+0x8c8/0x2860 [ 26.262817] __do_softirq+0x1b7/0x7d4 [ 26.263334] [ 26.263567] Last potentially related work creation: [ 26.264317] kasan_save_stack+0x22/0x50 [ 26.264860] __kasan_record_aux_stack+0x8e/0xa0 [ 26.265489] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.266181] remove_vma+0x139/0x170 [ 26.266667] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.267288] do_vmi_munmap+0x1f1/0x2b0 [ 26.267810] __vm_munmap+0x138/0x3a0 [ 26.268335] __x64_sys_munmap+0x59/0x80 [ 26.268880] do_syscall_64+0x3f/0x90 [ 26.269386] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.270089] [ 26.270316] Second to last potentially related work creation: [ 26.271090] kasan_save_stack+0x22/0x50 [ 26.271636] __kasan_record_aux_stack+0x8e/0xa0 [ 26.272279] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.272970] remove_vma+0x139/0x170 [ 26.273457] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.274053] do_vmi_munmap+0x1f1/0x2b0 [ 26.274581] mmap_region+0x1f9/0x2660 [ 26.275100] do_mmap+0x854/0xf00 [ 26.275579] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.276138] ksys_mmap_pgoff+0x3af/0x500 [ 26.276677] do_syscall_64+0x3f/0x90 [ 26.277190] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.277877] [ 26.278111] The buggy address belongs to the object at ffff88800e0bd658 [ 26.278111] which belongs to the cache vm_area_struct of size 168 [ 26.279686] The buggy address is located 88 bytes inside of [ 26.279686] freed 168-byte region [ffff88800e0bd658, ffff88800e0bd700) [ 26.281221] [ 26.281454] The buggy address belongs to the physical page: [ 26.282168] page:0000000015f3d3ba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0bd [ 26.283353] memcg:ffff88800f029d01 [ 26.283815] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.284523] page_type: 0xffffffff() [ 26.285026] raw: 0100000000000200 ffff88800879fc80 ffffea000037cd80 dead000000000004 [ 26.286038] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f029d01 [ 26.287028] page dumped because: kasan: bad access detected [ 26.287736] [ 26.287968] Memory state around the buggy address: [ 26.288594] ffff88800e0bd580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.289536] ffff88800e0bd600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 26.290458] >ffff88800e0bd680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.291407] ^ [ 26.292041] ffff88800e0bd700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 26.292983] ffff88800e0bd780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 26.293913] ================================================================== [ 26.294906] Disabling lock debugging due to kernel taint [ 28.455909] BUG: Bad rss-counter state mm:0000000058709da3 type:MM_FILEPAGES val:33 [ 28.456927] BUG: Bad rss-counter state mm:0000000058709da3 type:MM_ANONPAGES val:22 [ 28.963458] BUG: Bad rss-counter state mm:00000000696ac76a type:MM_FILEPAGES val:33 [ 28.964456] BUG: Bad rss-counter state mm:00000000696ac76a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40483' (ECDSA) to the list of known hosts. 2023/06/19 20:33:00 fuzzer started 2023/06/19 20:33:00 dialing manager at localhost:44161 2023/06/19 20:33:00 checking machine... 2023/06/19 20:33:00 checking revisions... [ 29.695597] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:33:00 testing simple program... [ 29.749070] cgroup: Unknown subsys name 'net' [ 29.787444] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:32:58 Registers: info registers vcpu 0 RAX=ffffffff8609675b RBX=0000000000000001 RCX=ffffffff86096756 RDX=0000000000000000 RSI=0000000000000000 RDI=1ffffffff0c12ceb RBP=ffff888015aa7688 RSP=ffff888015aa7570 R8 =ffffffff8609675a R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff888015aa7690 R13=ffff888015aa7678 R14=ffff888015aa7671 R15=ffff888015aa7630 RIP=ffffffff81130aa8 RFL=00000216 [----AP-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7693fff700 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f0e03a21000 CR3=000000001a832000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2030303a33333a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a32333a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffe50f9d000 CR3=000000001662e000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000