syzkaller login: [ 88.953990] BUG: Bad rss-counter state mm:0000000035de880b type:MM_FILEPAGES val:33 [ 88.955935] BUG: Bad rss-counter state mm:0000000035de880b type:MM_ANONPAGES val:22 [ 89.120340] ================================================================== [ 89.121485] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 89.122628] Read of size 8 at addr ffff888015d1d058 by task sshd/219 [ 89.123457] [ 89.123678] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 89.124712] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 89.125713] Call Trace: [ 89.126032] [ 89.126326] dump_stack_lvl+0x91/0xf0 [ 89.126823] print_report+0xcc/0x620 [ 89.127309] ? __virt_addr_valid+0x102/0x340 [ 89.127868] ? vma_interval_tree_remove+0xc75/0xec0 [ 89.128490] ? vma_interval_tree_remove+0xc75/0xec0 [ 89.129120] kasan_report+0xbe/0xf0 [ 89.129596] ? vma_interval_tree_remove+0xc75/0xec0 [ 89.130220] vma_interval_tree_remove+0xc75/0xec0 [ 89.130827] vma_prepare+0xc54/0x11a0 [ 89.131312] __split_vma+0x5af/0x950 [ 89.131785] ? __pfx___split_vma+0x10/0x10 [ 89.132312] ? find_held_lock+0x2c/0x110 [ 89.132830] do_vmi_align_munmap+0x2ba/0x11f0 [ 89.133414] ? lock_is_held_type+0x9f/0x120 [ 89.133954] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 89.134685] ? mtree_range_walk+0x632/0x900 [ 89.135250] ? mas_walk+0x5c7/0x7c0 [ 89.135727] do_vmi_munmap+0x1f1/0x2b0 [ 89.136225] mmap_region+0x1f9/0x2660 [ 89.136706] ? vm_mmap_pgoff+0x15c/0x3a0 [ 89.137233] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 89.137951] ? __pfx_lock_acquire+0x10/0x10 [ 89.138484] ? __pfx_mmap_region+0x10/0x10 [ 89.139015] ? security_mmap_addr+0x7d/0xa0 [ 89.139545] ? get_unmapped_area+0x1f5/0x3f0 [ 89.140093] do_mmap+0x854/0xf00 [ 89.140534] vm_mmap_pgoff+0x1a6/0x3a0 [ 89.141086] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 89.141651] ksys_mmap_pgoff+0x3af/0x500 [ 89.142160] do_syscall_64+0x3f/0x90 [ 89.142651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 89.143306] RIP: 0033:0x7f249e22ad82 [ 89.143770] 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 [ 89.145957] RSP: 002b:00007ffcaea7cb08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 89.146899] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f249e22ad82 [ 89.147774] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f249d664000 [ 89.148640] RBP: 00007f249d664000 R08: 0000000000000009 R09: 0000000000001000 [ 89.149526] R10: 0000000000000812 R11: 0000000000000206 R12: 00005603ab4d5b20 [ 89.150396] R13: 00007ffcaea7cb20 R14: 00007ffcaea7cb50 R15: 00007ffcaea7ceb0 [ 89.151268] [ 89.151562] [ 89.151783] Allocated by task 212: [ 89.152219] kasan_save_stack+0x22/0x50 [ 89.152738] kasan_set_track+0x25/0x30 [ 89.153260] __kasan_slab_alloc+0x59/0x70 [ 89.153788] kmem_cache_alloc+0x16b/0x370 [ 89.154325] vm_area_dup+0x20/0x160 [ 89.154780] __split_vma+0x170/0x950 [ 89.155252] split_vma+0xc6/0x110 [ 89.155697] mprotect_fixup+0x8d2/0xb30 [ 89.156199] do_mprotect_pkey+0x87e/0xd40 [ 89.156725] __x64_sys_mprotect+0x78/0xc0 [ 89.157255] do_syscall_64+0x3f/0x90 [ 89.157750] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 89.158397] [ 89.158612] Freed by task 212: [ 89.159025] kasan_save_stack+0x22/0x50 [ 89.159543] kasan_set_track+0x25/0x30 [ 89.160065] kasan_save_free_info+0x2b/0x50 [ 89.160614] __kasan_slab_free+0x10a/0x190 [ 89.161173] kmem_cache_free+0x10d/0x4d0 [ 89.161690] rcu_core+0x8c8/0x2860 [ 89.162145] __do_softirq+0x1b7/0x7d4 [ 89.162622] [ 89.162844] Last potentially related work creation: [ 89.163444] kasan_save_stack+0x22/0x50 [ 89.163954] __kasan_record_aux_stack+0x8e/0xa0 [ 89.164550] __call_rcu_common.constprop.0+0x6a/0xb90 [ 89.165215] remove_vma+0x139/0x170 [ 89.165690] do_vmi_align_munmap+0xd4a/0x11f0 [ 89.166269] do_vmi_munmap+0x1f1/0x2b0 [ 89.166768] __vm_munmap+0x138/0x3a0 [ 89.167237] __x64_sys_munmap+0x59/0x80 [ 89.167753] do_syscall_64+0x3f/0x90 [ 89.168232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 89.168889] [ 89.169117] The buggy address belongs to the object at ffff888015d1d000 [ 89.169117] which belongs to the cache vm_area_struct of size 168 [ 89.170660] The buggy address is located 88 bytes inside of [ 89.170660] freed 168-byte region [ffff888015d1d000, ffff888015d1d0a8) [ 89.172156] [ 89.172387] The buggy address belongs to the physical page: [ 89.173103] page:00000000406d7028 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15d1d [ 89.174202] memcg:ffff888016ee7e01 [ 89.174645] flags: 0x100000000000200(slab|node=0|zone=1) [ 89.175302] page_type: 0xffffffff() [ 89.175753] raw: 0100000000000200 ffff88800879fc80 ffffea00003fbf80 000000000000000a [ 89.176665] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ee7e01 [ 89.177587] page dumped because: kasan: bad access detected [ 89.178253] [ 89.178470] Memory state around the buggy address: [ 89.179056] ffff888015d1cf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 89.179928] ffff888015d1cf80: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 89.180811] >ffff888015d1d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 89.181677] ^ [ 89.182419] ffff888015d1d080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 89.183279] ffff888015d1d100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 89.184130] ================================================================== [ 89.185321] Disabling lock debugging due to kernel taint [ 91.802366] BUG: Bad rss-counter state mm:00000000fc571160 type:MM_FILEPAGES val:33 [ 91.803500] BUG: Bad rss-counter state mm:00000000fc571160 type:MM_ANONPAGES val:22 [ 92.292986] BUG: Bad rss-counter state mm:000000009f2f482a type:MM_FILEPAGES val:33 [ 92.294437] BUG: Bad rss-counter state mm:000000009f2f482a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64768' (ECDSA) to the list of known hosts. 2023/06/20 00:24:04 fuzzer started 2023/06/20 00:24:04 dialing manager at localhost:44161 2023/06/20 00:24:04 checking machine... 2023/06/20 00:24:04 checking revisions... [ 92.960086] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:24:04 testing simple program... [ 93.007891] cgroup: Unknown subsys name 'net' [ 93.073473] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:23:07 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880145df7a0 RCX=0000000000000000 RDX=0000000000000001 RSI=0000000000000040 RDI=ffff8880145df830 RBP=ffff8880087b6780 RSP=ffff8880145df7a0 R8 =ffff88800ed67400 R9 =0000000000000000 R10=ffffed1001dace80 R11=0000000000000000 R12=0000000000000dc0 R13=0000000000000dc0 R14=0000000000000001 R15=0000000000000dc0 RIP=ffffffff813ad663 RFL=00000287 [--S--PC] 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 00007ff137238900 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=00007ff13668c520 CR3=000000000bbda000 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=6234bf8f1af864c100000000000ae988 XMM05=ca78761f2f5907f1000000000013a300 XMM06=806171799158d96700000000001393a0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=000055edda358748 CR3=000000000dfb4000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000