syzkaller login: [ 33.148360] BUG: Bad rss-counter state mm:000000006619e15b type:MM_FILEPAGES val:33 [ 33.149955] BUG: Bad rss-counter state mm:000000006619e15b type:MM_ANONPAGES val:22 [ 33.317198] ================================================================== [ 33.318105] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.319048] Read of size 8 at addr ffff8880098485c8 by task sshd/220 [ 33.319824] [ 33.320040] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.321010] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.321969] Call Trace: [ 33.322284] [ 33.322587] dump_stack_lvl+0x91/0xf0 [ 33.323075] print_report+0xcc/0x620 [ 33.323564] ? __virt_addr_valid+0x102/0x340 [ 33.324117] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.324765] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.325393] kasan_report+0xbe/0xf0 [ 33.325868] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.326510] vma_interval_tree_remove+0xc75/0xec0 [ 33.327133] vma_prepare+0xc54/0x11a0 [ 33.327634] __split_vma+0x5af/0x950 [ 33.328129] ? __pfx___split_vma+0x10/0x10 [ 33.328713] ? find_held_lock+0x2c/0x110 [ 33.329260] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.329838] ? lock_is_held_type+0x9f/0x120 [ 33.330401] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.331030] ? mtree_range_walk+0x632/0x900 [ 33.331606] ? mas_walk+0x5c7/0x7c0 [ 33.332096] do_vmi_munmap+0x1f1/0x2b0 [ 33.332631] mmap_region+0x1f9/0x2660 [ 33.333132] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.333668] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.334405] ? __pfx_lock_acquire+0x10/0x10 [ 33.334962] ? __pfx_mmap_region+0x10/0x10 [ 33.335507] ? security_mmap_addr+0x7d/0xa0 [ 33.336059] ? get_unmapped_area+0x1f5/0x3f0 [ 33.336645] do_mmap+0x854/0xf00 [ 33.337098] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.337617] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.338190] ksys_mmap_pgoff+0x3af/0x500 [ 33.338720] do_syscall_64+0x3f/0x90 [ 33.339213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.339878] RIP: 0033:0x7f09f73a0d82 [ 33.340358] 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 [ 33.342616] RSP: 002b:00007ffd6a0cea18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.343568] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f09f73a0d82 [ 33.344462] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f09f67da000 [ 33.345346] RBP: 00007f09f67da000 R08: 0000000000000009 R09: 0000000000001000 [ 33.346225] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564065cccec0 [ 33.347108] R13: 00007ffd6a0cea30 R14: 00007ffd6a0cea60 R15: 00007ffd6a0cedc0 [ 33.347998] [ 33.348302] [ 33.348535] Allocated by task 213: [ 33.348980] kasan_save_stack+0x22/0x50 [ 33.349508] kasan_set_track+0x25/0x30 [ 33.350021] __kasan_slab_alloc+0x59/0x70 [ 33.350564] kmem_cache_alloc+0x16b/0x370 [ 33.351104] vm_area_dup+0x20/0x160 [ 33.351568] __split_vma+0x170/0x950 [ 33.352047] split_vma+0xc6/0x110 [ 33.352517] mprotect_fixup+0x8d2/0xb30 [ 33.353034] do_mprotect_pkey+0x87e/0xd40 [ 33.353577] __x64_sys_mprotect+0x78/0xc0 [ 33.354114] do_syscall_64+0x3f/0x90 [ 33.354603] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.355268] [ 33.355490] Freed by task 213: [ 33.355899] kasan_save_stack+0x22/0x50 [ 33.356425] kasan_set_track+0x25/0x30 [ 33.356938] kasan_save_free_info+0x2b/0x50 [ 33.357499] __kasan_slab_free+0x10a/0x190 [ 33.358050] kmem_cache_free+0x10d/0x4d0 [ 33.358584] rcu_core+0x8c8/0x2860 [ 33.359041] __do_softirq+0x1b7/0x7d4 [ 33.359542] [ 33.359766] Last potentially related work creation: [ 33.360371] kasan_save_stack+0x22/0x50 [ 33.360912] __kasan_record_aux_stack+0x8e/0xa0 [ 33.361510] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.362179] remove_vma+0x139/0x170 [ 33.362640] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.363217] do_vmi_munmap+0x1f1/0x2b0 [ 33.363722] __vm_munmap+0x138/0x3a0 [ 33.364204] __x64_sys_munmap+0x59/0x80 [ 33.364720] do_syscall_64+0x3f/0x90 [ 33.365206] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.365878] [ 33.366097] Second to last potentially related work creation: [ 33.366803] kasan_save_stack+0x22/0x50 [ 33.367333] __kasan_record_aux_stack+0x8e/0xa0 [ 33.367928] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.368614] remove_vma+0x139/0x170 [ 33.369080] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.369659] do_vmi_munmap+0x1f1/0x2b0 [ 33.370162] mmap_region+0x1f9/0x2660 [ 33.370657] do_mmap+0x854/0xf00 [ 33.371105] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.371615] ksys_mmap_pgoff+0x7d/0x500 [ 33.372130] do_syscall_64+0x3f/0x90 [ 33.372660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.373342] [ 33.373564] The buggy address belongs to the object at ffff888009848570 [ 33.373564] which belongs to the cache vm_area_struct of size 168 [ 33.375083] The buggy address is located 88 bytes inside of [ 33.375083] freed 168-byte region [ffff888009848570, ffff888009848618) [ 33.376560] [ 33.376780] The buggy address belongs to the physical page: [ 33.377463] page:000000005cb1e621 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9848 [ 33.378600] memcg:ffff88800dd09601 [ 33.379041] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.379765] page_type: 0xffffffff() [ 33.380234] raw: 0100000000000200 ffff88800879fc80 ffffea00003c0040 dead000000000003 [ 33.381195] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd09601 [ 33.382144] page dumped because: kasan: bad access detected [ 33.382834] [ 33.383054] Memory state around the buggy address: [ 33.383659] ffff888009848480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.384580] ffff888009848500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 33.385470] >ffff888009848580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.386357] ^ [ 33.387057] ffff888009848600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 33.387949] ffff888009848680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.388841] ================================================================== [ 33.389861] Disabling lock debugging due to kernel taint [ 35.570406] BUG: Bad rss-counter state mm:00000000abf5fc57 type:MM_FILEPAGES val:33 [ 35.571608] BUG: Bad rss-counter state mm:00000000abf5fc57 type:MM_ANONPAGES val:22 [ 36.014346] BUG: Bad rss-counter state mm:0000000013d3f846 type:MM_FILEPAGES val:33 [ 36.015674] BUG: Bad rss-counter state mm:0000000013d3f846 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42479' (ECDSA) to the list of known hosts. 2023/06/20 04:09:47 fuzzer started 2023/06/20 04:09:47 dialing manager at localhost:44161 2023/06/20 04:09:47 checking machine... 2023/06/20 04:09:47 checking revisions... [ 36.739428] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:09:47 testing simple program... [ 36.784976] cgroup: Unknown subsys name 'net' [ 36.825247] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:09:43 Registers: info registers vcpu 0 RAX=ffff88800d970001 RBX=ffff88800d96f9c0 RCX=0000000000000001 RDX=ffff88800d96f901 RSI=ffff88800d96f9b8 RDI=ffff88800d96f9d0 RBP=ffff88800d96f9b8 RSP=ffff88800d96f8c8 R8 =ffffffff8609675a R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=0000000000000008 R13=ffff88800d968000 R14=ffff88800d96f9c0 R15=ffff88800d96f9c0 RIP=ffffffff8113048d 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 00007fbf4784a900 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=00007fbf46d6b008 CR3=000000000c5a0000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=39dff6c778777d9b00000000000ae988 XMM05=fe6527fc60f0165f0000000000135d18 XMM06=e4cb8bb95a7664b60000000000134bb0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800fe88000 RCX=0000000000000009 RDX=0000000000000400 RSI=0000000000000000 RDI=ffffed1001fd1180 RBP=0000000000002000 RSP=ffff888015b8f648 R8 =ffff88800fe88000 R9 =0000000000000000 R10=ffffed1001fd1000 R11=ffffffff81806df1 R12=ffff88800fe88000 R13=00000000000928c0 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d403 RFL=00000206 [-----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 00007fec7027f900 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=00007ffed58e4000 CR3=0000000015bd2000 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