syzkaller login: [ 30.812054] BUG: Bad rss-counter state mm:00000000b1f90964 type:MM_FILEPAGES val:33 [ 30.813386] BUG: Bad rss-counter state mm:00000000b1f90964 type:MM_ANONPAGES val:22 [ 30.854865] ================================================================== [ 30.855848] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.856779] Read of size 8 at addr ffff888016834c20 by task sshd/221 [ 30.857561] [ 30.857786] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.858648] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.859606] Call Trace: [ 30.859930] [ 30.860218] dump_stack_lvl+0x91/0xf0 [ 30.860709] print_report+0xcc/0x620 [ 30.861197] ? __virt_addr_valid+0x102/0x340 [ 30.861763] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.862374] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.862995] kasan_report+0xbe/0xf0 [ 30.863470] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.864107] vma_interval_tree_remove+0xc75/0xec0 [ 30.864711] vma_prepare+0xc54/0x11a0 [ 30.865235] __split_vma+0x5af/0x950 [ 30.865780] ? __pfx___split_vma+0x10/0x10 [ 30.866346] ? find_held_lock+0x2c/0x110 [ 30.866910] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.867524] ? lock_is_held_type+0x9f/0x120 [ 30.868126] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.868788] ? mtree_range_walk+0x632/0x900 [ 30.869382] ? mas_walk+0x5c7/0x7c0 [ 30.869913] do_vmi_munmap+0x1f1/0x2b0 [ 30.870460] mmap_region+0x1f9/0x2660 [ 30.870992] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.871545] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.872334] ? __pfx_lock_acquire+0x10/0x10 [ 30.872921] ? __pfx_mmap_region+0x10/0x10 [ 30.873495] ? security_mmap_addr+0x7d/0xa0 [ 30.874112] ? get_unmapped_area+0x1f5/0x3f0 [ 30.874727] do_mmap+0x854/0xf00 [ 30.875200] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.875745] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.876358] ksys_mmap_pgoff+0x3af/0x500 [ 30.876925] do_syscall_64+0x3f/0x90 [ 30.877452] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.878172] RIP: 0033:0x7f665333fd82 [ 30.878675] 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 [ 30.881007] RSP: 002b:00007ffc822c0458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.881993] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f665333fd82 [ 30.882907] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6652779000 [ 30.883763] RBP: 00007f6652779000 R08: 0000000000000009 R09: 0000000000001000 [ 30.884599] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a82cfcaf70 [ 30.885439] R13: 00007ffc822c0470 R14: 00007ffc822c04a0 R15: 00007ffc822c0800 [ 30.886332] [ 30.886627] [ 30.886847] Allocated by task 214: [ 30.887276] kasan_save_stack+0x22/0x50 [ 30.887777] kasan_set_track+0x25/0x30 [ 30.888276] __kasan_slab_alloc+0x59/0x70 [ 30.888796] kmem_cache_alloc+0x16b/0x370 [ 30.889317] vm_area_dup+0x20/0x160 [ 30.889795] __split_vma+0x170/0x950 [ 30.890262] split_vma+0xc6/0x110 [ 30.890704] mprotect_fixup+0x8d2/0xb30 [ 30.891212] do_mprotect_pkey+0x87e/0xd40 [ 30.891730] __x64_sys_mprotect+0x78/0xc0 [ 30.892258] do_syscall_64+0x3f/0x90 [ 30.892732] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.893426] [ 30.893691] Freed by task 214: [ 30.894192] kasan_save_stack+0x22/0x50 [ 30.894730] kasan_set_track+0x25/0x30 [ 30.895268] kasan_save_free_info+0x2b/0x50 [ 30.895839] __kasan_slab_free+0x10a/0x190 [ 30.896418] kmem_cache_free+0x10d/0x4d0 [ 30.896977] rcu_core+0x8c8/0x2860 [ 30.897464] __do_softirq+0x1b7/0x7d4 [ 30.898000] [ 30.898237] Last potentially related work creation: [ 30.898897] kasan_save_stack+0x22/0x50 [ 30.899448] __kasan_record_aux_stack+0x8e/0xa0 [ 30.900074] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.900778] remove_vma+0x139/0x170 [ 30.901266] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.901894] do_vmi_munmap+0x1f1/0x2b0 [ 30.902427] __vm_munmap+0x138/0x3a0 [ 30.902946] __x64_sys_munmap+0x59/0x80 [ 30.903498] do_syscall_64+0x3f/0x90 [ 30.904022] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.904726] [ 30.904969] The buggy address belongs to the object at ffff888016834bc8 [ 30.904969] which belongs to the cache vm_area_struct of size 168 [ 30.906594] The buggy address is located 88 bytes inside of [ 30.906594] freed 168-byte region [ffff888016834bc8, ffff888016834c70) [ 30.908120] [ 30.908354] The buggy address belongs to the physical page: [ 30.909086] page:000000002cdec330 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16834 [ 30.910302] memcg:ffff88800c47af01 [ 30.910770] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.911477] page_type: 0xffffffff() [ 30.911969] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.912959] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c47af01 [ 30.913975] page dumped because: kasan: bad access detected [ 30.914693] [ 30.914924] Memory state around the buggy address: [ 30.915564] ffff888016834b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.916495] ffff888016834b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.917419] >ffff888016834c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.918367] ^ [ 30.918949] ffff888016834c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.919876] ffff888016834d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.920806] ================================================================== [ 30.921821] Disabling lock debugging due to kernel taint [ 32.799293] BUG: Bad rss-counter state mm:00000000b5a7426d type:MM_FILEPAGES val:33 [ 32.800051] BUG: Bad rss-counter state mm:00000000b5a7426d type:MM_ANONPAGES val:22 [ 33.223123] BUG: Bad rss-counter state mm:000000009e7baad5 type:MM_FILEPAGES val:33 [ 33.224010] BUG: Bad rss-counter state mm:000000009e7baad5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63582' (ECDSA) to the list of known hosts. 2023/06/20 01:23:24 fuzzer started 2023/06/20 01:23:24 dialing manager at localhost:44161 2023/06/20 01:23:24 checking machine... 2023/06/20 01:23:24 checking revisions... [ 33.963885] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:23:25 testing simple program... [ 34.011042] cgroup: Unknown subsys name 'net' [ 34.051088] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:23:24 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff88801c1e7418 RSI=ffffffff838698e6 RDI=ffff88801c1e7418 RBP=ffff88801c1e74b0 RSP=ffff88801c1e7400 R8 =0000000000000001 R9 =ffff88801c1e7458 R10=0000000000038001 R11=000000000008b93b R12=ffff88801c1e74e0 R13=0000000000000000 R14=ffff88800e87b680 R15=ffff88801c1e7418 RIP=ffffffff811305e8 RFL=00000202 [-------] 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 00007fc4e87f7900 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=00007fc4e8dae618 CR3=000000000e274000 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=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=ffff888008c58400 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=00007f401c93c640 CR3=0000000008ecc000 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=00000000000000000000000000000000 XMM01=bc7e2849887ff1b52049c67c1eab3b45 XMM02=000000000011c488eff9b2d0a8fce9cb XMM03=000000000011c5582c67c8bc2e329bc3 XMM04=c72f3e9300af171900000000000ae988 XMM05=59d5b690e0af863b0000000000133588 XMM06=00c3ffa147b8d8570000000000133410 XMM07=e042d86d42eb936e0000000000123c18 XMM08=7e87d3351f9562ca000000000011c558 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000