syzkaller login: [ 30.577480] BUG: Bad rss-counter state mm:0000000010ec05bd type:MM_FILEPAGES val:33 [ 30.578732] BUG: Bad rss-counter state mm:0000000010ec05bd type:MM_ANONPAGES val:22 [ 30.615274] ================================================================== [ 30.616191] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.617144] Read of size 8 at addr ffff8880165d0798 by task sshd/221 [ 30.618037] [ 30.618259] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.619250] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.620222] Call Trace: [ 30.620547] [ 30.620856] dump_stack_lvl+0x91/0xf0 [ 30.621349] print_report+0xcc/0x620 [ 30.621847] ? __virt_addr_valid+0x102/0x340 [ 30.622405] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.623024] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.623646] kasan_report+0xbe/0xf0 [ 30.624122] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.624746] vma_interval_tree_remove+0xc75/0xec0 [ 30.625342] vma_prepare+0xc54/0x11a0 [ 30.625834] __split_vma+0x5af/0x950 [ 30.626308] ? __pfx___split_vma+0x10/0x10 [ 30.626840] ? find_held_lock+0x2c/0x110 [ 30.627361] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.627926] ? lock_is_held_type+0x9f/0x120 [ 30.628465] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.629075] ? mtree_range_walk+0x632/0x900 [ 30.629644] ? mas_walk+0x5c7/0x7c0 [ 30.630127] do_vmi_munmap+0x1f1/0x2b0 [ 30.630621] mmap_region+0x1f9/0x2660 [ 30.631107] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.631619] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.632325] ? __pfx_lock_acquire+0x10/0x10 [ 30.632863] ? __pfx_mmap_region+0x10/0x10 [ 30.633393] ? security_mmap_addr+0x7d/0xa0 [ 30.633933] ? get_unmapped_area+0x1f5/0x3f0 [ 30.634482] do_mmap+0x854/0xf00 [ 30.634930] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.635432] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.636004] ksys_mmap_pgoff+0x3af/0x500 [ 30.636520] do_syscall_64+0x3f/0x90 [ 30.637004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.637658] RIP: 0033:0x7fe725112d82 [ 30.638120] 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 [ 30.640229] RSP: 002b:00007ffc404f3158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.641141] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe725112d82 [ 30.642002] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe72454c000 [ 30.642851] RBP: 00007fe72454c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.643702] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562a7bbefec0 [ 30.644545] R13: 00007ffc404f3170 R14: 00007ffc404f31a0 R15: 00007ffc404f3500 [ 30.645399] [ 30.645695] [ 30.645912] Allocated by task 214: [ 30.646336] kasan_save_stack+0x22/0x50 [ 30.646842] kasan_set_track+0x25/0x30 [ 30.647337] __kasan_slab_alloc+0x59/0x70 [ 30.647864] kmem_cache_alloc+0x16b/0x370 [ 30.648379] vm_area_dup+0x20/0x160 [ 30.648842] __split_vma+0x170/0x950 [ 30.649305] split_vma+0xc6/0x110 [ 30.649770] mprotect_fixup+0x8d2/0xb30 [ 30.650272] do_mprotect_pkey+0x87e/0xd40 [ 30.650800] __x64_sys_mprotect+0x78/0xc0 [ 30.651319] do_syscall_64+0x3f/0x90 [ 30.651804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.652443] [ 30.652664] Freed by task 214: [ 30.653057] kasan_save_stack+0x22/0x50 [ 30.653571] kasan_set_track+0x25/0x30 [ 30.654060] kasan_save_free_info+0x2b/0x50 [ 30.654602] __kasan_slab_free+0x10a/0x190 [ 30.655134] kmem_cache_free+0x10d/0x4d0 [ 30.655642] rcu_core+0x8c8/0x2860 [ 30.656085] __do_softirq+0x1b7/0x7d4 [ 30.656570] [ 30.656789] Last potentially related work creation: [ 30.657383] kasan_save_stack+0x22/0x50 [ 30.657903] __kasan_record_aux_stack+0x8e/0xa0 [ 30.658481] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.659129] remove_vma+0x139/0x170 [ 30.659588] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.660153] do_vmi_munmap+0x1f1/0x2b0 [ 30.660644] __vm_munmap+0x138/0x3a0 [ 30.661116] __x64_sys_munmap+0x59/0x80 [ 30.661620] do_syscall_64+0x3f/0x90 [ 30.662092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.662734] [ 30.662952] The buggy address belongs to the object at ffff8880165d0740 [ 30.662952] which belongs to the cache vm_area_struct of size 168 [ 30.664421] The buggy address is located 88 bytes inside of [ 30.664421] freed 168-byte region [ffff8880165d0740, ffff8880165d07e8) [ 30.665827] [ 30.666046] The buggy address belongs to the physical page: [ 30.666711] page:00000000599a6d06 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x165d0 [ 30.667804] memcg:ffff888019dc7201 [ 30.668227] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.668872] page_type: 0xffffffff() [ 30.669329] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.670273] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019dc7201 [ 30.671176] page dumped because: kasan: bad access detected [ 30.671850] [ 30.672068] Memory state around the buggy address: [ 30.672659] ffff8880165d0680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.673523] ffff8880165d0700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.674400] >ffff8880165d0780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.675247] ^ [ 30.675741] ffff8880165d0800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.676602] ffff8880165d0880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.677453] ================================================================== [ 30.678597] Disabling lock debugging due to kernel taint [ 32.557241] BUG: Bad rss-counter state mm:00000000807b1614 type:MM_FILEPAGES val:33 [ 32.558265] BUG: Bad rss-counter state mm:00000000807b1614 type:MM_ANONPAGES val:22 [ 33.204900] BUG: Bad rss-counter state mm:000000008d69d69f type:MM_FILEPAGES val:33 [ 33.206217] BUG: Bad rss-counter state mm:000000008d69d69f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22862' (ECDSA) to the list of known hosts. 2023/06/20 11:36:46 fuzzer started 2023/06/20 11:36:46 dialing manager at localhost:36067 2023/06/20 11:36:46 checking machine... 2023/06/20 11:36:46 checking revisions... [ 33.896663] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:36:47 testing simple program... [ 33.947307] cgroup: Unknown subsys name 'net' [ 33.992219] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:36:46 Registers: info registers vcpu 0 RAX=0000000000000010 RBX=0000000000000002 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff84da4200 RDI=0000000000000002 RBP=ffffffff84da4200 RSP=ffff88801430fdc0 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffff888019a0f8c0 R15=0000000000000000 RIP=ffffffff814c0488 RFL=00000246 [---Z-P-] 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 00007f55d9e3e900 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=00007f55da3f3650 CR3=000000001bc46000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=1ffff11002879fac RCX=0000000000000000 RDX=1ffff110018aef6b RSI=8000000018512005 RDI=0000000000000000 RBP=8000000018512025 RSP=ffff8880143cfd38 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=8000000018512005 R13=ffffffff852c61f8 R14=000000000c577007 R15=000000000ea3d067 RIP=ffffffff814c0430 RFL=00000286 [--S--P-] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc630704900 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=00007fc62fb6be30 CR3=000000000c782000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=734219614f81979a00000000000ae988 XMM05=ed435c996e1e3fcf00000000001322a0 XMM06=e4cb8bb95a7664b60000000000131408 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000