syzkaller login: [ 30.697294] BUG: Bad rss-counter state mm:000000002c5521aa type:MM_FILEPAGES val:33 [ 30.698499] BUG: Bad rss-counter state mm:000000002c5521aa type:MM_ANONPAGES val:22 [ 30.738116] ================================================================== [ 30.739212] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.740286] Read of size 8 at addr ffff88800deb4310 by task sshd/220 [ 30.741271] [ 30.741512] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.742441] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.743641] Call Trace: [ 30.743986] [ 30.744292] dump_stack_lvl+0x91/0xf0 [ 30.744911] print_report+0xcc/0x620 [ 30.745583] ? __virt_addr_valid+0x102/0x340 [ 30.746179] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.746928] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.747600] kasan_report+0xbe/0xf0 [ 30.748225] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.749065] vma_interval_tree_remove+0xc75/0xec0 [ 30.749798] vma_prepare+0xc54/0x11a0 [ 30.750334] __split_vma+0x5af/0x950 [ 30.750858] ? __pfx___split_vma+0x10/0x10 [ 30.751445] ? find_held_lock+0x2c/0x110 [ 30.752022] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.752651] ? lock_is_held_type+0x9f/0x120 [ 30.753266] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.753947] ? mtree_range_walk+0x632/0x900 [ 30.754559] ? mas_walk+0x5c7/0x7c0 [ 30.755087] do_vmi_munmap+0x1f1/0x2b0 [ 30.755641] mmap_region+0x1f9/0x2660 [ 30.756178] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.756753] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.757566] ? __pfx_lock_acquire+0x10/0x10 [ 30.758157] ? __pfx_mmap_region+0x10/0x10 [ 30.758742] ? security_mmap_addr+0x7d/0xa0 [ 30.759334] ? get_unmapped_area+0x1f5/0x3f0 [ 30.759945] do_mmap+0x854/0xf00 [ 30.760435] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.760989] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.761618] ksys_mmap_pgoff+0x3af/0x500 [ 30.762184] do_syscall_64+0x3f/0x90 [ 30.762720] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.763438] RIP: 0033:0x7f9dcb8e0d82 [ 30.763944] 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 [ 30.766320] RSP: 002b:00007ffdd864b6d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.767336] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9dcb8e0d82 [ 30.768272] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9dcad1a000 [ 30.769216] RBP: 00007f9dcad1a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.770143] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561cc316dec0 [ 30.771084] R13: 00007ffdd864b6f0 R14: 00007ffdd864b720 R15: 00007ffdd864ba80 [ 30.772035] [ 30.772355] [ 30.772593] Allocated by task 213: [ 30.773082] kasan_save_stack+0x22/0x50 [ 30.773644] kasan_set_track+0x25/0x30 [ 30.774194] __kasan_slab_alloc+0x59/0x70 [ 30.774775] kmem_cache_alloc+0x16b/0x370 [ 30.775350] vm_area_dup+0x20/0x160 [ 30.775852] __split_vma+0x170/0x950 [ 30.776370] split_vma+0xc6/0x110 [ 30.776862] mprotect_fixup+0x8d2/0xb30 [ 30.777427] do_mprotect_pkey+0x87e/0xd40 [ 30.778006] __x64_sys_mprotect+0x78/0xc0 [ 30.778587] do_syscall_64+0x3f/0x90 [ 30.779117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.779839] [ 30.780077] Freed by task 213: [ 30.780509] kasan_save_stack+0x22/0x50 [ 30.781083] kasan_set_track+0x25/0x30 [ 30.781628] kasan_save_free_info+0x2b/0x50 [ 30.782219] __kasan_slab_free+0x10a/0x190 [ 30.782935] kmem_cache_free+0x10d/0x4d0 [ 30.783496] rcu_core+0x8c8/0x2860 [ 30.783990] __do_softirq+0x1b7/0x7d4 [ 30.784522] [ 30.784757] Last potentially related work creation: [ 30.785419] kasan_save_stack+0x22/0x50 [ 30.785973] __kasan_record_aux_stack+0x8e/0xa0 [ 30.786609] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.787322] remove_vma+0x139/0x170 [ 30.787827] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.788449] do_vmi_munmap+0x1f1/0x2b0 [ 30.788989] __vm_munmap+0x138/0x3a0 [ 30.789514] __x64_sys_munmap+0x59/0x80 [ 30.790058] do_syscall_64+0x3f/0x90 [ 30.790583] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.791294] [ 30.791535] Second to last potentially related work creation: [ 30.792293] kasan_save_stack+0x22/0x50 [ 30.792845] __kasan_record_aux_stack+0x8e/0xa0 [ 30.793498] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.794211] remove_vma+0x139/0x170 [ 30.794715] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.795331] do_vmi_munmap+0x1f1/0x2b0 [ 30.795874] mmap_region+0x1f9/0x2660 [ 30.796402] do_mmap+0x854/0xf00 [ 30.796877] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.797429] ksys_mmap_pgoff+0x3af/0x500 [ 30.797986] do_syscall_64+0x3f/0x90 [ 30.798518] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.799234] [ 30.799468] The buggy address belongs to the object at ffff88800deb42b8 [ 30.799468] which belongs to the cache vm_area_struct of size 168 [ 30.801112] The buggy address is located 88 bytes inside of [ 30.801112] freed 168-byte region [ffff88800deb42b8, ffff88800deb4360) [ 30.802670] [ 30.802912] The buggy address belongs to the physical page: [ 30.803642] page:00000000f9a9fc41 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdeb4 [ 30.804844] memcg:ffff88800ddc1001 [ 30.805326] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.806040] page_type: 0xffffffff() [ 30.806535] raw: 0100000000000200 ffff8880087a0c80 ffffea00003f7200 dead000000000004 [ 30.807547] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddc1001 [ 30.808541] page dumped because: kasan: bad access detected [ 30.809282] [ 30.809517] Memory state around the buggy address: [ 30.810165] ffff88800deb4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.811114] ffff88800deb4280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.812064] >ffff88800deb4300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.813003] ^ [ 30.813532] ffff88800deb4380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.814477] ffff88800deb4400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.815416] ================================================================== [ 30.816555] Disabling lock debugging due to kernel taint [ 33.573182] BUG: Bad rss-counter state mm:000000003c3cffdb type:MM_FILEPAGES val:33 [ 33.574364] BUG: Bad rss-counter state mm:000000003c3cffdb type:MM_ANONPAGES val:22 [ 34.102313] BUG: Bad rss-counter state mm:00000000fe761a3d type:MM_FILEPAGES val:33 [ 34.103502] BUG: Bad rss-counter state mm:00000000fe761a3d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62473' (ECDSA) to the list of known hosts. 2023/06/21 06:55:32 fuzzer started 2023/06/21 06:55:32 dialing manager at localhost:36067 2023/06/21 06:55:32 checking machine... 2023/06/21 06:55:33 checking revisions... [ 34.723521] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:55:33 testing simple program... [ 34.760765] cgroup: Unknown subsys name 'net' [ 34.807227] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:55:32 Registers: info registers vcpu 0 RAX=ffffffff8180c705 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=1ffff110011b3f3a RSI=ffffffff8180c705 RDI=ffff888008d9fa40 RBP=ffff888008d9fa10 RSP=ffff888008d9f970 R8 =ffffffff86138e90 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000020d8f R12=ffff888008d9fa40 R13=0000000000000000 R14=ffff888008d90000 R15=ffff88801bfee1b0 RIP=ffffffff813ad470 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 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=00007f12c907ce30 CR3=00000000101c8000 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=2032333a35353a3630203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a35353a3630203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bf4bc9 RBX=ffffffff85fa5e4c RCX=ffffffff8364444a RDX=0000000000000000 RSI=ffffffff863b4bc8 RDI=ffffffff85fa5e44 RBP=ffffffff85fa5e44 RSP=ffff888009d07870 R8 =ffffffff863b4bc8 R9 =ffff888009d07968 R10=0000000000038001 R11=000000000008ad20 R12=ffffffff85fa5e58 R13=ffffffff85fa5e44 R14=ffffffff85fa5e44 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007f7228bbd900 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=00007ffd8a437000 CR3=000000000dea0000 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