syzkaller login: [ 38.805884] BUG: Bad rss-counter state mm:00000000e39e869d type:MM_FILEPAGES val:33 [ 38.807099] BUG: Bad rss-counter state mm:00000000e39e869d type:MM_ANONPAGES val:22 [ 38.848672] ================================================================== [ 38.849732] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.850769] Read of size 8 at addr ffff888018e7ec20 by task sshd/219 [ 38.851615] [ 38.851837] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.852922] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.853913] Call Trace: [ 38.854242] [ 38.854539] dump_stack_lvl+0x91/0xf0 [ 38.855031] print_report+0xcc/0x620 [ 38.855513] ? __virt_addr_valid+0x102/0x340 [ 38.856090] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.856741] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.857365] kasan_report+0xbe/0xf0 [ 38.857862] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.858507] vma_interval_tree_remove+0xc75/0xec0 [ 38.859124] vma_prepare+0xc54/0x11a0 [ 38.859609] __split_vma+0x5af/0x950 [ 38.860076] ? __pfx___split_vma+0x10/0x10 [ 38.860624] ? find_held_lock+0x2c/0x110 [ 38.861148] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.861741] ? lock_is_held_type+0x9f/0x120 [ 38.862311] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.862948] ? mtree_range_walk+0x632/0x900 [ 38.863531] ? mas_walk+0x5c7/0x7c0 [ 38.864016] do_vmi_munmap+0x1f1/0x2b0 [ 38.864517] mmap_region+0x1f9/0x2660 [ 38.865024] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.865548] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.866299] ? __pfx_lock_acquire+0x10/0x10 [ 38.866840] ? __pfx_mmap_region+0x10/0x10 [ 38.867396] ? security_mmap_addr+0x7d/0xa0 [ 38.867954] ? get_unmapped_area+0x1f5/0x3f0 [ 38.868521] do_mmap+0x854/0xf00 [ 38.868998] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.869504] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.870092] ksys_mmap_pgoff+0x3af/0x500 [ 38.870617] do_syscall_64+0x3f/0x90 [ 38.871117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.871793] RIP: 0033:0x7f2d39617d82 [ 38.872279] 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 [ 38.874540] RSP: 002b:00007ffd98a60438 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.875489] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2d39617d82 [ 38.876365] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2d38a51000 [ 38.877260] RBP: 00007f2d38a51000 R08: 0000000000000009 R09: 0000000000001000 [ 38.878133] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b600d10ec0 [ 38.879010] R13: 00007ffd98a60450 R14: 00007ffd98a60480 R15: 00007ffd98a607e0 [ 38.879911] [ 38.880218] [ 38.880446] Allocated by task 212: [ 38.880891] kasan_save_stack+0x22/0x50 [ 38.881418] kasan_set_track+0x25/0x30 [ 38.881931] __kasan_slab_alloc+0x59/0x70 [ 38.882474] kmem_cache_alloc+0x16b/0x370 [ 38.883006] vm_area_dup+0x20/0x160 [ 38.883468] __split_vma+0x170/0x950 [ 38.883955] split_vma+0xc6/0x110 [ 38.884395] mprotect_fixup+0x8d2/0xb30 [ 38.884908] do_mprotect_pkey+0x87e/0xd40 [ 38.885430] __x64_sys_mprotect+0x78/0xc0 [ 38.885955] do_syscall_64+0x3f/0x90 [ 38.886438] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.887081] [ 38.887299] Freed by task 212: [ 38.887693] kasan_save_stack+0x22/0x50 [ 38.888194] kasan_set_track+0x25/0x30 [ 38.888706] kasan_save_free_info+0x2b/0x50 [ 38.889245] __kasan_slab_free+0x10a/0x190 [ 38.889777] kmem_cache_free+0x10d/0x4d0 [ 38.890279] rcu_core+0x8c8/0x2860 [ 38.890725] __do_softirq+0x1b7/0x7d4 [ 38.891200] [ 38.891413] Last potentially related work creation: [ 38.891997] kasan_save_stack+0x22/0x50 [ 38.892502] __kasan_record_aux_stack+0x8e/0xa0 [ 38.893092] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.893737] remove_vma+0x139/0x170 [ 38.894185] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.894736] do_vmi_munmap+0x1f1/0x2b0 [ 38.895219] __vm_munmap+0x138/0x3a0 [ 38.895681] __x64_sys_munmap+0x59/0x80 [ 38.896177] do_syscall_64+0x3f/0x90 [ 38.896667] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.897303] [ 38.897518] The buggy address belongs to the object at ffff888018e7ebc8 [ 38.897518] which belongs to the cache vm_area_struct of size 168 [ 38.899023] The buggy address is located 88 bytes inside of [ 38.899023] freed 168-byte region [ffff888018e7ebc8, ffff888018e7ec70) [ 38.900430] [ 38.900662] The buggy address belongs to the physical page: [ 38.901313] page:000000000c9a7134 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18e7e [ 38.902402] memcg:ffff888009a40501 [ 38.902825] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.903467] page_type: 0xffffffff() [ 38.903916] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.904854] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a40501 [ 38.905752] page dumped because: kasan: bad access detected [ 38.906405] [ 38.906620] Memory state around the buggy address: [ 38.907204] ffff888018e7eb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.908061] ffff888018e7eb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.908931] >ffff888018e7ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.909774] ^ [ 38.910306] ffff888018e7ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.911159] ffff888018e7ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.912005] ================================================================== [ 38.913047] Disabling lock debugging due to kernel taint [ 40.908957] BUG: Bad rss-counter state mm:00000000596ec37e type:MM_FILEPAGES val:33 [ 40.910094] BUG: Bad rss-counter state mm:00000000596ec37e type:MM_ANONPAGES val:22 [ 41.372516] BUG: Bad rss-counter state mm:0000000058a48e93 type:MM_FILEPAGES val:33 [ 41.373578] BUG: Bad rss-counter state mm:0000000058a48e93 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1615' (ECDSA) to the list of known hosts. 2023/06/21 00:31:43 fuzzer started 2023/06/21 00:31:43 dialing manager at localhost:36067 2023/06/21 00:31:43 checking machine... 2023/06/21 00:31:43 checking revisions... [ 42.110827] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:31:43 testing simple program... [ 42.157142] cgroup: Unknown subsys name 'net' [ 42.203311] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:31:42 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a67 RBX=fffffbfff0ba7a68 RCX=ffffffff8122e145 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d338 RBP=fffffbfff0ba7a67 RSP=ffff88800f0e7c58 R8 =0000000000000000 R9 =fffffbfff0ba7a67 R10=ffffffff85d3d33f R11=1ffff1100d9c7479 R12=0000000000000000 R13=ffff888008d91f20 R14=ffff888008d91b54 R15=0000000000000001 RIP=ffffffff8180f0a8 RFL=00000083 [--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff4fb86b900 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=00007ffe8a6a6000 CR3=000000000e518000 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=0000ff00000000000000000000000000 XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 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=00007f96b0bdf000 CR3=000000000e398000 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=2032343a31333a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a31333a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000