syzkaller login: [ 29.167996] BUG: Bad rss-counter state mm:00000000edbd2552 type:MM_FILEPAGES val:33 [ 29.169219] BUG: Bad rss-counter state mm:00000000edbd2552 type:MM_ANONPAGES val:22 [ 29.208802] ================================================================== [ 29.210020] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.211276] Read of size 8 at addr ffff88800ea42c20 by task sshd/219 [ 29.212206] [ 29.212471] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.213485] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.214651] Call Trace: [ 29.215038] [ 29.215372] dump_stack_lvl+0x91/0xf0 [ 29.215961] print_report+0xcc/0x620 [ 29.216565] ? __virt_addr_valid+0x102/0x340 [ 29.217125] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.217743] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.218361] kasan_report+0xbe/0xf0 [ 29.218839] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.219473] vma_interval_tree_remove+0xc75/0xec0 [ 29.220090] vma_prepare+0xc54/0x11a0 [ 29.220596] __split_vma+0x5af/0x950 [ 29.221077] ? __pfx___split_vma+0x10/0x10 [ 29.221615] ? find_held_lock+0x2c/0x110 [ 29.222145] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.222717] ? lock_is_held_type+0x9f/0x120 [ 29.223268] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.223884] ? mtree_range_walk+0x632/0x900 [ 29.224460] ? mas_walk+0x5c7/0x7c0 [ 29.224936] do_vmi_munmap+0x1f1/0x2b0 [ 29.225441] mmap_region+0x1f9/0x2660 [ 29.225931] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.226459] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.227189] ? __pfx_lock_acquire+0x10/0x10 [ 29.227729] ? __pfx_mmap_region+0x10/0x10 [ 29.228265] ? security_mmap_addr+0x7d/0xa0 [ 29.228803] ? get_unmapped_area+0x1f5/0x3f0 [ 29.229354] do_mmap+0x854/0xf00 [ 29.229804] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.230325] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.230899] ksys_mmap_pgoff+0x3af/0x500 [ 29.231412] do_syscall_64+0x3f/0x90 [ 29.231902] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.232577] RIP: 0033:0x7ff23d504d82 [ 29.233036] 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 [ 29.235181] RSP: 002b:00007ffe0071edc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.236097] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff23d504d82 [ 29.236962] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff23c93e000 [ 29.237827] RBP: 00007ff23c93e000 R08: 0000000000000009 R09: 0000000000001000 [ 29.238682] R10: 0000000000000812 R11: 0000000000000206 R12: 00005605da42bec0 [ 29.239536] R13: 00007ffe0071ede0 R14: 00007ffe0071ee10 R15: 00007ffe0071f170 [ 29.240415] [ 29.240711] [ 29.240933] Allocated by task 212: [ 29.241370] kasan_save_stack+0x22/0x50 [ 29.241873] kasan_set_track+0x25/0x30 [ 29.242374] __kasan_slab_alloc+0x59/0x70 [ 29.242904] kmem_cache_alloc+0x16b/0x370 [ 29.243427] vm_area_dup+0x20/0x160 [ 29.243897] __split_vma+0x170/0x950 [ 29.244381] split_vma+0xc6/0x110 [ 29.244827] mprotect_fixup+0x8d2/0xb30 [ 29.245332] do_mprotect_pkey+0x87e/0xd40 [ 29.245854] __x64_sys_mprotect+0x78/0xc0 [ 29.246393] do_syscall_64+0x3f/0x90 [ 29.246871] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.247519] [ 29.247738] Freed by task 212: [ 29.248144] kasan_save_stack+0x22/0x50 [ 29.248649] kasan_set_track+0x25/0x30 [ 29.249146] kasan_save_free_info+0x2b/0x50 [ 29.249704] __kasan_slab_free+0x10a/0x190 [ 29.250238] kmem_cache_free+0x10d/0x4d0 [ 29.250744] rcu_core+0x8c8/0x2860 [ 29.251192] __do_softirq+0x1b7/0x7d4 [ 29.251680] [ 29.251896] Last potentially related work creation: [ 29.252616] kasan_save_stack+0x22/0x50 [ 29.253118] __kasan_record_aux_stack+0x8e/0xa0 [ 29.253698] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.254352] remove_vma+0x139/0x170 [ 29.254805] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.255362] do_vmi_munmap+0x1f1/0x2b0 [ 29.255855] __vm_munmap+0x138/0x3a0 [ 29.256343] __x64_sys_munmap+0x59/0x80 [ 29.256840] do_syscall_64+0x3f/0x90 [ 29.257322] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.257966] [ 29.258183] Second to last potentially related work creation: [ 29.258872] kasan_save_stack+0x22/0x50 [ 29.259380] __kasan_record_aux_stack+0x8e/0xa0 [ 29.259965] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.260616] remove_vma+0x139/0x170 [ 29.261080] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.261647] do_vmi_munmap+0x1f1/0x2b0 [ 29.262133] mmap_region+0x1f9/0x2660 [ 29.262611] do_mmap+0x854/0xf00 [ 29.263053] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.263551] ksys_mmap_pgoff+0x3af/0x500 [ 29.264051] do_syscall_64+0x3f/0x90 [ 29.264556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.265203] [ 29.265421] The buggy address belongs to the object at ffff88800ea42bc8 [ 29.265421] which belongs to the cache vm_area_struct of size 168 [ 29.266917] The buggy address is located 88 bytes inside of [ 29.266917] freed 168-byte region [ffff88800ea42bc8, ffff88800ea42c70) [ 29.268319] [ 29.268533] The buggy address belongs to the physical page: [ 29.269197] page:0000000012fcfdc9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea42 [ 29.270291] memcg:ffff88800de85f01 [ 29.270726] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.271432] page_type: 0xffffffff() [ 29.271889] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b2240 dead000000000007 [ 29.272835] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de85f01 [ 29.273749] page dumped because: kasan: bad access detected [ 29.274408] [ 29.274619] Memory state around the buggy address: [ 29.275202] ffff88800ea42b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.276059] ffff88800ea42b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 29.276954] >ffff88800ea42c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.277803] ^ [ 29.278336] ffff88800ea42c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 29.279198] ffff88800ea42d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 29.280067] ================================================================== [ 29.281074] Disabling lock debugging due to kernel taint [ 31.858709] BUG: Bad rss-counter state mm:000000009e22ffdb type:MM_FILEPAGES val:33 [ 31.859758] BUG: Bad rss-counter state mm:000000009e22ffdb type:MM_ANONPAGES val:22 [ 32.324670] BUG: Bad rss-counter state mm:000000009daf13d8 type:MM_FILEPAGES val:33 [ 32.326307] BUG: Bad rss-counter state mm:000000009daf13d8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37034' (ECDSA) to the list of known hosts. 2023/06/20 15:10:18 fuzzer started 2023/06/20 15:10:18 dialing manager at localhost:36067 2023/06/20 15:10:18 checking machine... 2023/06/20 15:10:18 checking revisions... [ 33.065218] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:10:18 testing simple program... [ 33.109433] cgroup: Unknown subsys name 'net' [ 33.146115] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:10:18 Registers: info registers vcpu 0 RAX=1ffff1100198f543 RBX=ffff88800cc7a9e8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800cc7aa18 RBP=ffff88800cbdd658 RSP=ffff88806ce09db8 R8 =0000000000000001 R9 =ffffed100d9c13ab R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88800cbe5400 R14=ffffffff8186b835 R15=ffff888015baa080 RIP=ffffffff818464e2 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 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=00007faa33a8a020 CR3=000000000d6c0000 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=ba47e75d0381b5b9cc4a0b6b02de45f4 XMM02=ec2efd57dc4c00df000000000011a418 XMM03=f06a667e9d21a390000000000011a4e8 XMM04=4a3964c9d60dd93700000000000ae988 XMM05=dfcdbad4f1609c370000000000132b18 XMM06=32bbd2db182b9c740000000000131980 XMM07=e042d86d42eb936e0000000000121c18 XMM08=f06a667e9d21a390000000000011a4e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff88800c99ff60 RSI=ffff88800c99ff48 RDI=ffff88800c99f9c0 RBP=ffff88800c99fa58 RSP=ffff88800c99f9b8 R8 =0000000000000001 R9 =ffff88800c99fa00 R10=0000000000038001 R11=00000000000b5080 R12=ffff88800c99fa88 R13=0000000000000000 R14=ffff88801658d1c0 R15=ffff888015fd45c0 RIP=ffffffff81130340 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 00007f9b2b015900 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=00007f9b2b5cc618 CR3=000000001c990000 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=563412feff00545000000000000080fe 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