syzkaller login: [ 32.132108] BUG: Bad rss-counter state mm:00000000b845967e type:MM_FILEPAGES val:33 [ 32.133546] BUG: Bad rss-counter state mm:00000000b845967e type:MM_ANONPAGES val:22 [ 32.283585] ================================================================== [ 32.284503] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.285435] Read of size 8 at addr ffff8880101af3f8 by task sshd/219 [ 32.286389] [ 32.286620] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.287484] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.288477] Call Trace: [ 32.288792] [ 32.289077] dump_stack_lvl+0x91/0xf0 [ 32.289568] print_report+0xcc/0x620 [ 32.290063] ? __virt_addr_valid+0x102/0x340 [ 32.290646] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.291262] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.291876] kasan_report+0xbe/0xf0 [ 32.292363] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.292984] vma_interval_tree_remove+0xc75/0xec0 [ 32.293596] vma_prepare+0xc54/0x11a0 [ 32.294084] __split_vma+0x5af/0x950 [ 32.294566] ? __pfx___split_vma+0x10/0x10 [ 32.295103] ? find_held_lock+0x2c/0x110 [ 32.295623] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.296194] ? lock_is_held_type+0x9f/0x120 [ 32.296732] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.297348] ? mtree_range_walk+0x632/0x900 [ 32.297919] ? mas_walk+0x5c7/0x7c0 [ 32.298412] do_vmi_munmap+0x1f1/0x2b0 [ 32.298958] mmap_region+0x1f9/0x2660 [ 32.299463] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.299976] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.300693] ? __pfx_lock_acquire+0x10/0x10 [ 32.301232] ? __pfx_mmap_region+0x10/0x10 [ 32.301764] ? security_mmap_addr+0x7d/0xa0 [ 32.302314] ? get_unmapped_area+0x1f5/0x3f0 [ 32.302864] do_mmap+0x854/0xf00 [ 32.303311] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.303805] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.304366] ksys_mmap_pgoff+0x3af/0x500 [ 32.304869] do_syscall_64+0x3f/0x90 [ 32.305349] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.305991] RIP: 0033:0x7f1b9602dd82 [ 32.306469] 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 [ 32.308618] RSP: 002b:00007ffe9fd443b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.309531] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1b9602dd82 [ 32.310385] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1b95467000 [ 32.311243] RBP: 00007f1b95467000 R08: 0000000000000009 R09: 0000000000001000 [ 32.312088] R10: 0000000000000812 R11: 0000000000000206 R12: 00005633edb43f70 [ 32.312934] R13: 00007ffe9fd443d0 R14: 00007ffe9fd44400 R15: 00007ffe9fd44760 [ 32.313791] [ 32.314086] [ 32.314324] Allocated by task 212: [ 32.314750] kasan_save_stack+0x22/0x50 [ 32.315255] kasan_set_track+0x25/0x30 [ 32.315744] __kasan_slab_alloc+0x59/0x70 [ 32.316267] kmem_cache_alloc+0x16b/0x370 [ 32.316781] vm_area_dup+0x20/0x160 [ 32.317235] __split_vma+0x170/0x950 [ 32.317701] split_vma+0xc6/0x110 [ 32.318150] mprotect_fixup+0x8d2/0xb30 [ 32.318658] do_mprotect_pkey+0x87e/0xd40 [ 32.319181] __x64_sys_mprotect+0x78/0xc0 [ 32.319703] do_syscall_64+0x3f/0x90 [ 32.320176] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.320813] [ 32.321030] Freed by task 212: [ 32.321419] kasan_save_stack+0x22/0x50 [ 32.321928] kasan_set_track+0x25/0x30 [ 32.322436] kasan_save_free_info+0x2b/0x50 [ 32.322970] __kasan_slab_free+0x10a/0x190 [ 32.323500] kmem_cache_free+0x10d/0x4d0 [ 32.324005] rcu_core+0x8c8/0x2860 [ 32.324447] __do_softirq+0x1b7/0x7d4 [ 32.324923] [ 32.325137] Last potentially related work creation: [ 32.325723] kasan_save_stack+0x22/0x50 [ 32.326246] __kasan_record_aux_stack+0x8e/0xa0 [ 32.326818] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.327564] remove_vma+0x139/0x170 [ 32.328017] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.328579] do_vmi_munmap+0x1f1/0x2b0 [ 32.329068] __vm_munmap+0x138/0x3a0 [ 32.329537] __x64_sys_munmap+0x59/0x80 [ 32.330034] do_syscall_64+0x3f/0x90 [ 32.330522] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.331164] [ 32.331379] Second to last potentially related work creation: [ 32.332060] kasan_save_stack+0x22/0x50 [ 32.332561] __kasan_record_aux_stack+0x8e/0xa0 [ 32.333140] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.333776] remove_vma+0x139/0x170 [ 32.334238] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.334796] do_vmi_munmap+0x1f1/0x2b0 [ 32.335283] mmap_region+0x1f9/0x2660 [ 32.335758] do_mmap+0x854/0xf00 [ 32.336186] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.336675] ksys_mmap_pgoff+0x3af/0x500 [ 32.337173] do_syscall_64+0x3f/0x90 [ 32.337647] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.338305] [ 32.338529] The buggy address belongs to the object at ffff8880101af3a0 [ 32.338529] which belongs to the cache vm_area_struct of size 168 [ 32.339990] The buggy address is located 88 bytes inside of [ 32.339990] freed 168-byte region [ffff8880101af3a0, ffff8880101af448) [ 32.341398] [ 32.341615] The buggy address belongs to the physical page: [ 32.342301] page:00000000e64a9eaf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101af [ 32.343386] memcg:ffff888009c75001 [ 32.343813] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.344470] page_type: 0xffffffff() [ 32.344925] raw: 0100000000000200 ffff88800879fc80 ffffea00003d4e40 dead000000000002 [ 32.345844] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009c75001 [ 32.346774] page dumped because: kasan: bad access detected [ 32.347429] [ 32.347644] Memory state around the buggy address: [ 32.348223] ffff8880101af280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 32.349091] ffff8880101af300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.349951] >ffff8880101af380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.350806] ^ [ 32.351651] ffff8880101af400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.352503] ffff8880101af480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.353358] ================================================================== [ 32.354322] Disabling lock debugging due to kernel taint [ 35.012726] BUG: Bad rss-counter state mm:0000000077915bf9 type:MM_FILEPAGES val:33 [ 35.014267] BUG: Bad rss-counter state mm:0000000077915bf9 type:MM_ANONPAGES val:22 [ 35.536998] BUG: Bad rss-counter state mm:0000000074da3cb3 type:MM_FILEPAGES val:33 [ 35.538319] BUG: Bad rss-counter state mm:0000000074da3cb3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54179' (ECDSA) to the list of known hosts. 2023/06/19 17:01:13 fuzzer started 2023/06/19 17:01:13 dialing manager at localhost:44161 2023/06/19 17:01:13 checking machine... 2023/06/19 17:01:13 checking revisions... [ 36.264300] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:01:13 testing simple program... [ 36.316328] cgroup: Unknown subsys name 'net' [ 36.375854] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:01:11 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce2c240 RCX=0000000000000000 RDX=1ffffffff0a81e40 RSI=ffffffff813fc0cb RDI=0000000000000001 RBP=000000083c83dc50 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000017913c22a8 R12=00000000fffbf542 R13=00000000fffbf541 R14=ffffffff8540f200 R15=ffff88806ce2c248 RIP=ffffffff813fc117 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=00007ffc17437268 CR3=000000000ef2c000 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=2032313a31303a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a31303a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11001d89ebf RCX=0000000000000000 RDX=ffff88800953b680 RSI=ffff88801caee000 RDI=ffff88800fd31000 RBP=ffff88801caee000 RSP=ffff88800ec4f5c8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000b6500000b65 R12=0000000000000000 R13=0000000000000001 R14=ffff88800fd31000 R15=ffff88800fd31600 RIP=ffffffff81eeb5c4 RFL=00000293 [--S-A-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 00007ff6bfcf1900 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=00007ff6c02a8618 CR3=000000000c48a000 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=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