syzkaller login: [ 38.724584] BUG: Bad rss-counter state mm:00000000a21cbf2a type:MM_FILEPAGES val:33 [ 38.726347] BUG: Bad rss-counter state mm:00000000a21cbf2a type:MM_ANONPAGES val:22 [ 38.886839] ================================================================== [ 38.887798] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.888749] Read of size 8 at addr ffff88800dc276b0 by task sshd/220 [ 38.889647] [ 38.889878] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.890742] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.891741] Call Trace: [ 38.892062] [ 38.892345] dump_stack_lvl+0x91/0xf0 [ 38.892835] print_report+0xcc/0x620 [ 38.893324] ? __virt_addr_valid+0x102/0x340 [ 38.893884] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.894504] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.895130] kasan_report+0xbe/0xf0 [ 38.895616] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.896241] vma_interval_tree_remove+0xc75/0xec0 [ 38.896852] vma_prepare+0xc54/0x11a0 [ 38.897331] __split_vma+0x5af/0x950 [ 38.897807] ? __pfx___split_vma+0x10/0x10 [ 38.898338] ? find_held_lock+0x2c/0x110 [ 38.898875] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.899446] ? lock_is_held_type+0x9f/0x120 [ 38.899988] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.900597] ? mtree_range_walk+0x632/0x900 [ 38.901154] ? mas_walk+0x5c7/0x7c0 [ 38.901637] do_vmi_munmap+0x1f1/0x2b0 [ 38.902133] mmap_region+0x1f9/0x2660 [ 38.902621] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.903149] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.903865] ? __pfx_lock_acquire+0x10/0x10 [ 38.904399] ? __pfx_mmap_region+0x10/0x10 [ 38.904928] ? security_mmap_addr+0x7d/0xa0 [ 38.905460] ? get_unmapped_area+0x1f5/0x3f0 [ 38.906016] do_mmap+0x854/0xf00 [ 38.906460] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.906989] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.907556] ksys_mmap_pgoff+0x3af/0x500 [ 38.908065] do_syscall_64+0x3f/0x90 [ 38.908544] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.909192] RIP: 0033:0x7fbbb7d03d82 [ 38.909651] 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 [ 38.911796] RSP: 002b:00007ffd425835a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.912702] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbbb7d03d82 [ 38.913554] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbbb713d000 [ 38.914409] RBP: 00007fbbb713d000 R08: 0000000000000009 R09: 0000000000001000 [ 38.915272] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e3720e2f70 [ 38.916114] R13: 00007ffd425835c0 R14: 00007ffd425835f0 R15: 00007ffd42583950 [ 38.916973] [ 38.917267] [ 38.917482] Allocated by task 213: [ 38.917911] kasan_save_stack+0x22/0x50 [ 38.918417] kasan_set_track+0x25/0x30 [ 38.918940] __kasan_slab_alloc+0x59/0x70 [ 38.919469] kmem_cache_alloc+0x16b/0x370 [ 38.919986] vm_area_dup+0x20/0x160 [ 38.920443] __split_vma+0x170/0x950 [ 38.920909] split_vma+0xc6/0x110 [ 38.921350] mprotect_fixup+0x8d2/0xb30 [ 38.921851] do_mprotect_pkey+0x87e/0xd40 [ 38.922381] __x64_sys_mprotect+0x78/0xc0 [ 38.922906] do_syscall_64+0x3f/0x90 [ 38.923402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.924044] [ 38.924254] Freed by task 19: [ 38.924643] kasan_save_stack+0x22/0x50 [ 38.925151] kasan_set_track+0x25/0x30 [ 38.925644] kasan_save_free_info+0x2b/0x50 [ 38.926175] __kasan_slab_free+0x10a/0x190 [ 38.926716] kmem_cache_free+0x10d/0x4d0 [ 38.927253] rcu_core+0x8c8/0x2860 [ 38.927708] __do_softirq+0x1b7/0x7d4 [ 38.928192] [ 38.928414] Last potentially related work creation: [ 38.929014] kasan_save_stack+0x22/0x50 [ 38.929526] __kasan_record_aux_stack+0x8e/0xa0 [ 38.930112] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.930757] remove_vma+0x139/0x170 [ 38.931274] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.931836] do_vmi_munmap+0x1f1/0x2b0 [ 38.932332] __vm_munmap+0x138/0x3a0 [ 38.932811] __x64_sys_munmap+0x59/0x80 [ 38.933312] do_syscall_64+0x3f/0x90 [ 38.933790] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.934433] [ 38.934651] Second to last potentially related work creation: [ 38.935351] kasan_save_stack+0x22/0x50 [ 38.935857] __kasan_record_aux_stack+0x8e/0xa0 [ 38.936427] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.937068] remove_vma+0x139/0x170 [ 38.937523] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.938077] do_vmi_munmap+0x1f1/0x2b0 [ 38.938560] __vm_munmap+0x138/0x3a0 [ 38.939038] __x64_sys_munmap+0x59/0x80 [ 38.939545] do_syscall_64+0x3f/0x90 [ 38.940018] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.940662] [ 38.940879] The buggy address belongs to the object at ffff88800dc27658 [ 38.940879] which belongs to the cache vm_area_struct of size 168 [ 38.942350] The buggy address is located 88 bytes inside of [ 38.942350] freed 168-byte region [ffff88800dc27658, ffff88800dc27700) [ 38.943770] [ 38.943989] The buggy address belongs to the physical page: [ 38.944640] page:0000000080257e4a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc27 [ 38.945718] memcg:ffff88801445dc01 [ 38.946149] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.946801] page_type: 0xffffffff() [ 38.947260] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.948182] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801445dc01 [ 38.949091] page dumped because: kasan: bad access detected [ 38.949779] [ 38.949996] Memory state around the buggy address: [ 38.950588] ffff88800dc27580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.951464] ffff88800dc27600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.952333] >ffff88800dc27680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.953203] ^ [ 38.953802] ffff88800dc27700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.954677] ffff88800dc27780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.955553] ================================================================== [ 38.956509] Disabling lock debugging due to kernel taint [ 41.343547] BUG: Bad rss-counter state mm:000000005e732df1 type:MM_FILEPAGES val:33 [ 41.344986] BUG: Bad rss-counter state mm:000000005e732df1 type:MM_ANONPAGES val:22 [ 41.921793] BUG: Bad rss-counter state mm:0000000001c3b015 type:MM_FILEPAGES val:33 [ 41.923264] BUG: Bad rss-counter state mm:0000000001c3b015 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18629' (ECDSA) to the list of known hosts. 2023/06/20 14:46:18 fuzzer started 2023/06/20 14:46:18 dialing manager at localhost:36067 2023/06/20 14:46:18 checking machine... 2023/06/20 14:46:18 checking revisions... [ 42.573017] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:46:18 testing simple program... [ 42.687917] cgroup: Unknown subsys name 'net' [ 42.753209] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:46:18 Registers: info registers vcpu 0 RAX=ffff888008d9fcd8 RBX=0000000000000001 RCX=ffffffff86138e01 RDX=1ffff110011b3f38 RSI=ffffffff8180f5bb RDI=ffff888008d9f978 RBP=ffff888008d9f9d0 RSP=ffff888008d9f908 R8 =ffffffff86138eb4 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000020d9c R12=ffff888008d9fa40 R13=ffff888008d9f9c0 R14=ffff888008d90000 R15=ffff888008d9f978 RIP=ffffffff81130664 RFL=00000282 [--S----] 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 0000000000000000 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=00007fc4d8bfa650 CR3=000000000c808000 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=ffff88800909b780 RCX=0000000000000000 RDX=1ffff110028d9280 RSI=ffff8880146c9400 RDI=ffff8880146c802c RBP=ffff8880146c8000 RSP=ffff88806cf09d60 R8 =ffff88806cf39f70 R9 =0000000000012922 R10=0000000000012922 R11=0000000000000001 R12=00000000fffc0d8d R13=ffff88806cf39518 R14=0000000000000001 R15=ffff8880146c8000 RIP=ffffffff8124f4fb RFL=00000046 [---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 00007f33d9590900 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=00007f33d89b41d0 CR3=000000000946a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=cdbed6e5efabc91500000000000ae988 XMM05=b2c8a66a22eca7140000000000134508 XMM06=00c3ffa147b8d85700000000001332f8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000