syzkaller login: [ 38.730050] BUG: Bad rss-counter state mm:0000000098092858 type:MM_FILEPAGES val:33 [ 38.731567] BUG: Bad rss-counter state mm:0000000098092858 type:MM_ANONPAGES val:22 [ 38.879744] ================================================================== [ 38.880865] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.882039] Read of size 8 at addr ffff88800ea10ed8 by task sshd/219 [ 38.883088] [ 38.883313] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.884205] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.885222] Call Trace: [ 38.885550] [ 38.885839] dump_stack_lvl+0x91/0xf0 [ 38.886359] print_report+0xcc/0x620 [ 38.886856] ? __virt_addr_valid+0x102/0x340 [ 38.887421] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.888059] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.888687] kasan_report+0xbe/0xf0 [ 38.889172] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.889807] vma_interval_tree_remove+0xc75/0xec0 [ 38.890446] vma_prepare+0xc54/0x11a0 [ 38.890939] __split_vma+0x5af/0x950 [ 38.891430] ? __pfx___split_vma+0x10/0x10 [ 38.891977] ? find_held_lock+0x2c/0x110 [ 38.892514] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.893096] ? lock_is_held_type+0x9f/0x120 [ 38.893652] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.894303] ? mtree_range_walk+0x632/0x900 [ 38.894875] ? mas_walk+0x5c7/0x7c0 [ 38.895360] do_vmi_munmap+0x1f1/0x2b0 [ 38.895871] mmap_region+0x1f9/0x2660 [ 38.896365] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.896888] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.897624] ? __pfx_lock_acquire+0x10/0x10 [ 38.898195] ? __pfx_mmap_region+0x10/0x10 [ 38.898742] ? security_mmap_addr+0x7d/0xa0 [ 38.899289] ? get_unmapped_area+0x1f5/0x3f0 [ 38.899861] do_mmap+0x854/0xf00 [ 38.900316] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.900825] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.901397] ksys_mmap_pgoff+0x3af/0x500 [ 38.901937] do_syscall_64+0x3f/0x90 [ 38.902432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.903094] RIP: 0033:0x7f3b0028bd82 [ 38.903575] 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 [ 38.905769] RSP: 002b:00007ffc49d47f38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.906683] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3b0028bd82 [ 38.907536] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3aff6c5000 [ 38.908468] RBP: 00007f3aff6c5000 R08: 0000000000000009 R09: 0000000000001000 [ 38.909361] R10: 0000000000000812 R11: 0000000000000206 R12: 00005615f8a80b20 [ 38.910274] R13: 00007ffc49d47f50 R14: 00007ffc49d47f80 R15: 00007ffc49d482e0 [ 38.911150] [ 38.911443] [ 38.911660] Allocated by task 212: [ 38.912090] kasan_save_stack+0x22/0x50 [ 38.912605] kasan_set_track+0x25/0x30 [ 38.913111] __kasan_slab_alloc+0x59/0x70 [ 38.913654] kmem_cache_alloc+0x16b/0x370 [ 38.914185] vm_area_dup+0x20/0x160 [ 38.914646] __split_vma+0x170/0x950 [ 38.915129] split_vma+0xc6/0x110 [ 38.915573] mprotect_fixup+0x8d2/0xb30 [ 38.916083] do_mprotect_pkey+0x87e/0xd40 [ 38.916616] __x64_sys_mprotect+0x78/0xc0 [ 38.917145] do_syscall_64+0x3f/0x90 [ 38.917621] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.918296] [ 38.918526] Freed by task 212: [ 38.918944] kasan_save_stack+0x22/0x50 [ 38.919466] kasan_set_track+0x25/0x30 [ 38.919980] kasan_save_free_info+0x2b/0x50 [ 38.920537] __kasan_slab_free+0x10a/0x190 [ 38.921097] kmem_cache_free+0x10d/0x4d0 [ 38.921630] rcu_core+0x8c8/0x2860 [ 38.922121] __do_softirq+0x1b7/0x7d4 [ 38.922627] [ 38.922853] Last potentially related work creation: [ 38.923469] kasan_save_stack+0x22/0x50 [ 38.923994] __kasan_record_aux_stack+0x8e/0xa0 [ 38.924595] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.925273] remove_vma+0x139/0x170 [ 38.925743] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.926348] do_vmi_munmap+0x1f1/0x2b0 [ 38.926862] __vm_munmap+0x138/0x3a0 [ 38.927360] __x64_sys_munmap+0x59/0x80 [ 38.927885] do_syscall_64+0x3f/0x90 [ 38.928384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.929055] [ 38.929279] Second to last potentially related work creation: [ 38.930018] kasan_save_stack+0x22/0x50 [ 38.930548] __kasan_record_aux_stack+0x8e/0xa0 [ 38.931145] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.931816] remove_vma+0x139/0x170 [ 38.932289] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.932868] do_vmi_munmap+0x1f1/0x2b0 [ 38.933382] __vm_munmap+0x138/0x3a0 [ 38.933879] __x64_sys_munmap+0x59/0x80 [ 38.934400] do_syscall_64+0x3f/0x90 [ 38.934905] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.935583] [ 38.935807] The buggy address belongs to the object at ffff88800ea10e80 [ 38.935807] which belongs to the cache vm_area_struct of size 168 [ 38.937348] The buggy address is located 88 bytes inside of [ 38.937348] freed 168-byte region [ffff88800ea10e80, ffff88800ea10f28) [ 38.938846] [ 38.939069] The buggy address belongs to the physical page: [ 38.939771] page:00000000ca90e860 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea10 [ 38.940909] memcg:ffff88800db19201 [ 38.941351] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.942051] page_type: 0xffffffff() [ 38.942526] raw: 0100000000000200 ffff8880087a0c80 ffffea000026e140 dead000000000004 [ 38.943498] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db19201 [ 38.944461] page dumped because: kasan: bad access detected [ 38.945149] [ 38.945369] Memory state around the buggy address: [ 38.945998] ffff88800ea10d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.946892] ffff88800ea10e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.947792] >ffff88800ea10e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.948683] ^ [ 38.949439] ffff88800ea10f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.950362] ffff88800ea10f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.951262] ================================================================== [ 38.952495] Disabling lock debugging due to kernel taint [ 40.831838] BUG: Bad rss-counter state mm:000000003ef4e013 type:MM_FILEPAGES val:33 [ 40.832907] BUG: Bad rss-counter state mm:000000003ef4e013 type:MM_ANONPAGES val:22 [ 41.274850] BUG: Bad rss-counter state mm:0000000098f6aed9 type:MM_FILEPAGES val:33 [ 41.275852] BUG: Bad rss-counter state mm:0000000098f6aed9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41164' (ECDSA) to the list of known hosts. 2023/06/21 02:45:36 fuzzer started 2023/06/21 02:45:36 dialing manager at localhost:36067 2023/06/21 02:45:36 checking machine... 2023/06/21 02:45:36 checking revisions... [ 41.995071] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:45:36 testing simple program... [ 42.041464] cgroup: Unknown subsys name 'net' [ 42.096768] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:45:35 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff88801c8fa4c0 RCX=ffffffff81846775 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff88801c8fa550 RBP=ffff8880102df8b0 RSP=ffff8880102df868 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0030733a745f6c65 R12=ffff888008441500 R13=ffffea00006768c0 R14=ffffffff81eeadb0 R15=1ffff1100205bf1d RIP=ffffffff8180fed8 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f89b6d2d900 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=00007f89b6191f30 CR3=00000000144e4000 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=b422a0fc38b5c39d7943eb1e001e885d XMM02=000000000011a568eff9b2d0a8fce9cb XMM03=000000000011a6382c67c8bc2e329bc3 XMM04=328dcf7be7280eba00000000000ae988 XMM05=ab581873d9d8ded90000000000133220 XMM06=806171799158d9670000000000131ca0 XMM07=fb795ef6d65770560000000000121230 XMM08=2c67c8bc2e329bc3000000000011a5d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000009 RBX=0000000000000001 RCX=ffffffff8363b5a6 RDX=0000000000000009 RSI=ffffffff863b353c RDI=ffffffff85fa4f3c RBP=ffffffff85fa4f3c RSP=ffff88800fd8f870 R8 =ffffffff863b353c R9 =ffff88800fd8f968 R10=0000000000038001 R11=000000000008a95e R12=ffffffff85fa4f5c R13=ffffffff85fa4f3c R14=ffffffff85fa4f3c R15=dffffc0000000000 RIP=ffffffff8112fc49 RFL=00000283 [--S---C] 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 00007f9bbee3d900 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=00007ffeab94f000 CR3=000000000f988000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000