syzkaller login: [ 30.436825] BUG: Bad rss-counter state mm:000000007402d495 type:MM_FILEPAGES val:33 [ 30.437788] BUG: Bad rss-counter state mm:000000007402d495 type:MM_ANONPAGES val:22 [ 30.601485] ================================================================== [ 30.602339] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.603223] Read of size 8 at addr ffff88800dd0b6b0 by task sshd/219 [ 30.603948] [ 30.604157] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.605111] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.606027] Call Trace: [ 30.606330] [ 30.606599] dump_stack_lvl+0x91/0xf0 [ 30.607078] print_report+0xcc/0x620 [ 30.607540] ? __virt_addr_valid+0x102/0x340 [ 30.608057] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.608638] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.609262] kasan_report+0xbe/0xf0 [ 30.609712] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.610303] vma_interval_tree_remove+0xc75/0xec0 [ 30.610881] vma_prepare+0xc54/0x11a0 [ 30.611361] __split_vma+0x5af/0x950 [ 30.611825] ? __pfx___split_vma+0x10/0x10 [ 30.612363] ? find_held_lock+0x2c/0x110 [ 30.612937] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.613503] ? lock_is_held_type+0x9f/0x120 [ 30.614043] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.614646] ? mtree_range_walk+0x632/0x900 [ 30.615197] ? mas_walk+0x5c7/0x7c0 [ 30.615672] do_vmi_munmap+0x1f1/0x2b0 [ 30.616175] mmap_region+0x1f9/0x2660 [ 30.616648] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.617201] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.617920] ? __pfx_lock_acquire+0x10/0x10 [ 30.618451] ? __pfx_mmap_region+0x10/0x10 [ 30.618982] ? security_mmap_addr+0x7d/0xa0 [ 30.619516] ? get_unmapped_area+0x1f5/0x3f0 [ 30.620072] do_mmap+0x854/0xf00 [ 30.620589] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.621130] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.621690] ksys_mmap_pgoff+0x3af/0x500 [ 30.622197] do_syscall_64+0x3f/0x90 [ 30.622671] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.623325] RIP: 0033:0x7f450b3f1d82 [ 30.623789] 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 [ 30.625974] RSP: 002b:00007ffd34d693e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.626879] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f450b3f1d82 [ 30.627729] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f450a82b000 [ 30.628579] RBP: 00007f450a82b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.629458] R10: 0000000000000812 R11: 0000000000000206 R12: 00005634b1976f70 [ 30.630309] R13: 00007ffd34d69400 R14: 00007ffd34d69430 R15: 00007ffd34d69790 [ 30.631178] [ 30.631463] [ 30.631678] Allocated by task 212: [ 30.632117] kasan_save_stack+0x22/0x50 [ 30.632623] kasan_set_track+0x25/0x30 [ 30.633145] __kasan_slab_alloc+0x59/0x70 [ 30.633671] kmem_cache_alloc+0x16b/0x370 [ 30.634190] vm_area_dup+0x20/0x160 [ 30.634637] __split_vma+0x170/0x950 [ 30.635100] split_vma+0xc6/0x110 [ 30.635545] mprotect_fixup+0x8d2/0xb30 [ 30.636041] do_mprotect_pkey+0x87e/0xd40 [ 30.636549] __x64_sys_mprotect+0x78/0xc0 [ 30.637116] do_syscall_64+0x3f/0x90 [ 30.637592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.638243] [ 30.638457] Freed by task 203: [ 30.638846] kasan_save_stack+0x22/0x50 [ 30.639353] kasan_set_track+0x25/0x30 [ 30.639846] kasan_save_free_info+0x2b/0x50 [ 30.640376] __kasan_slab_free+0x10a/0x190 [ 30.640940] kmem_cache_free+0x10d/0x4d0 [ 30.641451] rcu_core+0x8c8/0x2860 [ 30.641899] __do_softirq+0x1b7/0x7d4 [ 30.642374] [ 30.642595] Last potentially related work creation: [ 30.643194] kasan_save_stack+0x22/0x50 [ 30.643685] __kasan_record_aux_stack+0x8e/0xa0 [ 30.644255] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.644939] remove_vma+0x139/0x170 [ 30.645393] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.645948] do_vmi_munmap+0x1f1/0x2b0 [ 30.646439] __vm_munmap+0x138/0x3a0 [ 30.646906] __x64_sys_munmap+0x59/0x80 [ 30.647391] do_syscall_64+0x3f/0x90 [ 30.647864] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.648516] [ 30.648755] Second to last potentially related work creation: [ 30.649455] kasan_save_stack+0x22/0x50 [ 30.649966] __kasan_record_aux_stack+0x8e/0xa0 [ 30.650529] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.651172] remove_vma+0x139/0x170 [ 30.651626] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.652175] do_vmi_munmap+0x1f1/0x2b0 [ 30.652663] mmap_region+0x1f9/0x2660 [ 30.653182] do_mmap+0x854/0xf00 [ 30.653616] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.654112] ksys_mmap_pgoff+0x3af/0x500 [ 30.654605] do_syscall_64+0x3f/0x90 [ 30.655080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.655726] [ 30.655942] The buggy address belongs to the object at ffff88800dd0b658 [ 30.655942] which belongs to the cache vm_area_struct of size 168 [ 30.657453] The buggy address is located 88 bytes inside of [ 30.657453] freed 168-byte region [ffff88800dd0b658, ffff88800dd0b700) [ 30.658884] [ 30.659101] The buggy address belongs to the physical page: [ 30.659770] page:000000000b60fc58 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd0b [ 30.660893] memcg:ffff88800d37d501 [ 30.661326] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.661986] page_type: 0xffffffff() [ 30.662442] raw: 0100000000000200 ffff8880087a0c80 ffffea0000406480 dead000000000002 [ 30.663367] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d37d501 [ 30.664281] page dumped because: kasan: bad access detected [ 30.664983] [ 30.665198] Memory state around the buggy address: [ 30.665786] ffff88800dd0b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.666644] ffff88800dd0b600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.667499] >ffff88800dd0b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.668357] ^ [ 30.668967] ffff88800dd0b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.669773] ffff88800dd0b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.670575] ================================================================== [ 30.671594] Disabling lock debugging due to kernel taint [ 32.518568] BUG: Bad rss-counter state mm:00000000adae66ba type:MM_FILEPAGES val:33 [ 32.519874] BUG: Bad rss-counter state mm:00000000adae66ba type:MM_ANONPAGES val:22 [ 32.994028] BUG: Bad rss-counter state mm:00000000c2e5d8ca type:MM_FILEPAGES val:33 [ 32.995263] BUG: Bad rss-counter state mm:00000000c2e5d8ca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27917' (ECDSA) to the list of known hosts. 2023/06/20 13:24:54 fuzzer started 2023/06/20 13:24:54 dialing manager at localhost:36067 2023/06/20 13:24:54 checking machine... 2023/06/20 13:24:54 checking revisions... [ 33.698572] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:24:54 testing simple program... [ 33.737612] cgroup: Unknown subsys name 'net' [ 33.793726] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:24:54 Registers: info registers vcpu 0 RAX=1ffff1100193ef24 RBX=ffffffff813ad470 RCX=ffff88800c9f7978 RDX=ffff88800c9f8000 RSI=ffff88800c9f7970 RDI=ffff88800c9f78e8 RBP=ffff88800c9f7970 RSP=ffff88800c9f78c8 R8 =0000000000000001 R9 =ffff88800c9f7918 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800c9f79a0 R13=0000000000000000 R14=ffff88800e893680 R15=ffff88800c9f78d8 RIP=ffffffff81132d3e RFL=00000296 [--S-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 00007f8c3d4fd900 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=00007ffc1cdcb000 CR3=0000000019536000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007eff1de52d08 CR3=000000000d76a000 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=8706c6f79463e8bbac482b6a1b09e7ba XMM02=000000000011a758ec2efd57dc4c00df XMM03=00000000001211a04be0f90671cbf102 XMM04=05a78238c8d9a96000000000000ae988 XMM05=dfcdbad4f1609c3700000000001322c0 XMM06=98e6049f5d9ca2a50000000000130d30 XMM07=e042d86d42eb936e0000000000121478 XMM08=4be0f90671cbf102000000000011a7b8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000