syzkaller login: [ 30.788504] BUG: Bad rss-counter state mm:000000002a681893 type:MM_FILEPAGES val:33 [ 30.789398] BUG: Bad rss-counter state mm:000000002a681893 type:MM_ANONPAGES val:22 [ 30.901210] ================================================================== [ 30.902344] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.903514] Read of size 8 at addr ffff88800e53edf0 by task sshd/220 [ 30.904470] [ 30.904740] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.905933] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.906949] Call Trace: [ 30.907153] [ 30.907333] dump_stack_lvl+0x91/0xf0 [ 30.907645] print_report+0xcc/0x620 [ 30.907957] ? __virt_addr_valid+0x102/0x340 [ 30.908318] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.908723] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.909120] kasan_report+0xbe/0xf0 [ 30.909421] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.909817] vma_interval_tree_remove+0xc75/0xec0 [ 30.910207] vma_prepare+0xc54/0x11a0 [ 30.910513] __split_vma+0x5af/0x950 [ 30.910821] ? __pfx___split_vma+0x10/0x10 [ 30.911158] ? find_held_lock+0x2c/0x110 [ 30.911492] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.911855] ? lock_is_held_type+0x9f/0x120 [ 30.912202] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.912593] ? mtree_range_walk+0x632/0x900 [ 30.912947] ? mas_walk+0x5c7/0x7c0 [ 30.913253] do_vmi_munmap+0x1f1/0x2b0 [ 30.913566] mmap_region+0x1f9/0x2660 [ 30.913877] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.914213] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.914674] ? __pfx_lock_acquire+0x10/0x10 [ 30.915019] ? __pfx_mmap_region+0x10/0x10 [ 30.915357] ? security_mmap_addr+0x7d/0xa0 [ 30.915700] ? get_unmapped_area+0x1f5/0x3f0 [ 30.916054] do_mmap+0x854/0xf00 [ 30.916348] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.916664] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.917025] ksys_mmap_pgoff+0x3af/0x500 [ 30.917349] do_syscall_64+0x3f/0x90 [ 30.917655] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.918086] RIP: 0033:0x7fad9177bd82 [ 30.918378] 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 [ 30.919746] RSP: 002b:00007ffcdc6bb658 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.920324] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fad9177bd82 [ 30.920876] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fad90bb5000 [ 30.921424] RBP: 00007fad90bb5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.921964] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563a876f4ec0 [ 30.922513] R13: 00007ffcdc6bb670 R14: 00007ffcdc6bb6a0 R15: 00007ffcdc6bba00 [ 30.923066] [ 30.923252] [ 30.923386] Allocated by task 213: [ 30.923665] kasan_save_stack+0x22/0x50 [ 30.923984] kasan_set_track+0x25/0x30 [ 30.924298] __kasan_slab_alloc+0x59/0x70 [ 30.924630] kmem_cache_alloc+0x16b/0x370 [ 30.924957] vm_area_dup+0x20/0x160 [ 30.925249] __split_vma+0x170/0x950 [ 30.925546] split_vma+0xc6/0x110 [ 30.925826] mprotect_fixup+0x8d2/0xb30 [ 30.926156] do_mprotect_pkey+0x87e/0xd40 [ 30.926486] __x64_sys_mprotect+0x78/0xc0 [ 30.926815] do_syscall_64+0x3f/0x90 [ 30.927120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.927534] [ 30.927670] Freed by task 213: [ 30.927929] kasan_save_stack+0x22/0x50 [ 30.928252] kasan_set_track+0x25/0x30 [ 30.928568] kasan_save_free_info+0x2b/0x50 [ 30.928908] __kasan_slab_free+0x10a/0x190 [ 30.929250] kmem_cache_free+0x10d/0x4d0 [ 30.929574] rcu_core+0x8c8/0x2860 [ 30.929858] __do_softirq+0x1b7/0x7d4 [ 30.930168] [ 30.930305] Last potentially related work creation: [ 30.930685] kasan_save_stack+0x22/0x50 [ 30.931009] __kasan_record_aux_stack+0x8e/0xa0 [ 30.931374] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.931784] remove_vma+0x139/0x170 [ 30.932077] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.932432] do_vmi_munmap+0x1f1/0x2b0 [ 30.932741] __vm_munmap+0x138/0x3a0 [ 30.933044] __x64_sys_munmap+0x59/0x80 [ 30.933361] do_syscall_64+0x3f/0x90 [ 30.933666] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.934091] [ 30.934226] Second to last potentially related work creation: [ 30.934668] kasan_save_stack+0x22/0x50 [ 30.934999] __kasan_record_aux_stack+0x8e/0xa0 [ 30.935363] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.935774] remove_vma+0x139/0x170 [ 30.936063] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.936418] do_vmi_munmap+0x1f1/0x2b0 [ 30.936725] mmap_region+0x1f9/0x2660 [ 30.937030] do_mmap+0x854/0xf00 [ 30.937304] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.937619] ksys_mmap_pgoff+0x7d/0x500 [ 30.937930] do_syscall_64+0x3f/0x90 [ 30.938238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.938649] [ 30.938785] The buggy address belongs to the object at ffff88800e53ed98 [ 30.938785] which belongs to the cache vm_area_struct of size 168 [ 30.939727] The buggy address is located 88 bytes inside of [ 30.939727] freed 168-byte region [ffff88800e53ed98, ffff88800e53ee40) [ 30.940625] [ 30.940763] The buggy address belongs to the physical page: [ 30.941186] page:00000000860c46cd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe53e [ 30.941884] memcg:ffff88800db3a101 [ 30.942165] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.942613] page_type: 0xffffffff() [ 30.942907] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.943496] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db3a101 [ 30.944079] page dumped because: kasan: bad access detected [ 30.944503] [ 30.944640] Memory state around the buggy address: [ 30.945010] ffff88800e53ec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.945561] ffff88800e53ed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.946165] >ffff88800e53ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.946715] ^ [ 30.947243] ffff88800e53ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.947793] ffff88800e53ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.948339] ================================================================== [ 30.948930] Disabling lock debugging due to kernel taint [ 33.100723] BUG: Bad rss-counter state mm:00000000d179d3ce type:MM_FILEPAGES val:33 [ 33.102036] BUG: Bad rss-counter state mm:00000000d179d3ce type:MM_ANONPAGES val:22 [ 33.553234] BUG: Bad rss-counter state mm:00000000d14c13c8 type:MM_FILEPAGES val:33 [ 33.554632] BUG: Bad rss-counter state mm:00000000d14c13c8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25557' (ECDSA) to the list of known hosts. 2023/06/21 04:12:12 fuzzer started 2023/06/21 04:12:13 dialing manager at localhost:36067 2023/06/21 04:12:13 checking machine... 2023/06/21 04:12:13 checking revisions... [ 34.293491] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:12:13 testing simple program... [ 34.357419] cgroup: Unknown subsys name 'net' [ 34.434219] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:12:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000003 RDI=0000000000000010 RBP=0000000000000010 RSP=ffff88800fcafe18 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000010 R11=0000000000000000 R12=0000000000000003 R13=0000000000000000 R14=1ffff11001f95fd1 R15=dffffc0000000000 RIP=ffffffff81ef4c14 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 00007f9a6ed6f900 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=00007ffcdf141000 CR3=000000000cb14000 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=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 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=00007fe53801f370 CR3=0000000016500000 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=2032313a32313a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a32313a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000