syzkaller login: [ 31.105187] BUG: Bad rss-counter state mm:00000000c8a83145 type:MM_FILEPAGES val:33 [ 31.106323] BUG: Bad rss-counter state mm:00000000c8a83145 type:MM_ANONPAGES val:22 [ 31.149725] ================================================================== [ 31.150826] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.151935] Read of size 8 at addr ffff88800e686ed8 by task sshd/219 [ 31.152718] [ 31.152954] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.153819] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.154835] Call Trace: [ 31.155174] [ 31.155460] dump_stack_lvl+0x91/0xf0 [ 31.155980] print_report+0xcc/0x620 [ 31.156471] ? __virt_addr_valid+0x102/0x340 [ 31.157043] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.157662] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.158296] kasan_report+0xbe/0xf0 [ 31.158779] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.159433] vma_interval_tree_remove+0xc75/0xec0 [ 31.160073] vma_prepare+0xc54/0x11a0 [ 31.160567] __split_vma+0x5af/0x950 [ 31.161061] ? __pfx___split_vma+0x10/0x10 [ 31.161599] ? find_held_lock+0x2c/0x110 [ 31.162188] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.162796] ? lock_is_held_type+0x9f/0x120 [ 31.163408] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.164091] ? mtree_range_walk+0x632/0x900 [ 31.164656] ? mas_walk+0x5c7/0x7c0 [ 31.165145] do_vmi_munmap+0x1f1/0x2b0 [ 31.165651] mmap_region+0x1f9/0x2660 [ 31.166150] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.166672] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.167413] ? __pfx_lock_acquire+0x10/0x10 [ 31.167989] ? __pfx_mmap_region+0x10/0x10 [ 31.168543] ? security_mmap_addr+0x7d/0xa0 [ 31.169094] ? get_unmapped_area+0x1f5/0x3f0 [ 31.169647] do_mmap+0x854/0xf00 [ 31.170098] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.170602] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.171183] ksys_mmap_pgoff+0x3af/0x500 [ 31.171697] do_syscall_64+0x3f/0x90 [ 31.172235] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.172890] RIP: 0033:0x7f9109518d82 [ 31.173368] 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 [ 31.175545] RSP: 002b:00007ffea5669cf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.176495] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9109518d82 [ 31.177357] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9108952000 [ 31.178229] RBP: 00007f9108952000 R08: 0000000000000009 R09: 0000000000001000 [ 31.179093] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562a5959fec0 [ 31.179993] R13: 00007ffea5669d10 R14: 00007ffea5669d40 R15: 00007ffea566a0a0 [ 31.180875] [ 31.181178] [ 31.181399] Allocated by task 212: [ 31.181845] kasan_save_stack+0x22/0x50 [ 31.182366] kasan_set_track+0x25/0x30 [ 31.182867] __kasan_slab_alloc+0x59/0x70 [ 31.183538] kmem_cache_alloc+0x16b/0x370 [ 31.184235] vm_area_dup+0x20/0x160 [ 31.184836] __split_vma+0x170/0x950 [ 31.185433] split_vma+0xc6/0x110 [ 31.185996] mprotect_fixup+0x8d2/0xb30 [ 31.186659] do_mprotect_pkey+0x87e/0xd40 [ 31.187345] __x64_sys_mprotect+0x78/0xc0 [ 31.187996] do_syscall_64+0x3f/0x90 [ 31.188582] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.189356] [ 31.189584] Freed by task 212: [ 31.189996] kasan_save_stack+0x22/0x50 [ 31.190508] kasan_set_track+0x25/0x30 [ 31.191172] kasan_save_free_info+0x2b/0x50 [ 31.191721] __kasan_slab_free+0x10a/0x190 [ 31.192319] kmem_cache_free+0x10d/0x4d0 [ 31.192839] rcu_core+0x8c8/0x2860 [ 31.193306] __do_softirq+0x1b7/0x7d4 [ 31.193803] [ 31.194036] Last potentially related work creation: [ 31.194629] kasan_save_stack+0x22/0x50 [ 31.195161] __kasan_record_aux_stack+0x8e/0xa0 [ 31.195765] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.196459] remove_vma+0x139/0x170 [ 31.196929] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.197508] do_vmi_munmap+0x1f1/0x2b0 [ 31.198028] __vm_munmap+0x138/0x3a0 [ 31.198524] __x64_sys_munmap+0x59/0x80 [ 31.199071] do_syscall_64+0x3f/0x90 [ 31.199575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.200280] [ 31.200503] The buggy address belongs to the object at ffff88800e686e80 [ 31.200503] which belongs to the cache vm_area_struct of size 168 [ 31.202079] The buggy address is located 88 bytes inside of [ 31.202079] freed 168-byte region [ffff88800e686e80, ffff88800e686f28) [ 31.203600] [ 31.203855] The buggy address belongs to the physical page: [ 31.204588] page:000000003e99612e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe686 [ 31.205804] memcg:ffff88801989b801 [ 31.206285] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.207100] page_type: 0xffffffff() [ 31.207556] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.208507] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801989b801 [ 31.209449] page dumped because: kasan: bad access detected [ 31.210133] [ 31.210349] Memory state around the buggy address: [ 31.210948] ffff88800e686d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.211831] ffff88800e686e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.212719] >ffff88800e686e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.213624] ^ [ 31.214366] ffff88800e686f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.215312] ffff88800e686f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.216344] ================================================================== [ 31.217309] Disabling lock debugging due to kernel taint [ 33.338842] BUG: Bad rss-counter state mm:000000009eb51b54 type:MM_FILEPAGES val:33 [ 33.340159] BUG: Bad rss-counter state mm:000000009eb51b54 type:MM_ANONPAGES val:22 [ 33.771471] BUG: Bad rss-counter state mm:00000000a8e3fd50 type:MM_FILEPAGES val:33 [ 33.772675] BUG: Bad rss-counter state mm:00000000a8e3fd50 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29247' (ECDSA) to the list of known hosts. 2023/06/20 11:31:35 fuzzer started 2023/06/20 11:31:36 dialing manager at localhost:36067 2023/06/20 11:31:36 checking machine... 2023/06/20 11:31:36 checking revisions... [ 34.535491] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:31:36 testing simple program... [ 34.580901] cgroup: Unknown subsys name 'net' [ 34.665710] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:31:35 Registers: info registers vcpu 0 RAX=1ffffffff0bbfc32 RBX=ffffffff85dfe190 RCX=ffffffff8180ce88 RDX=0000000000000000 RSI=ffffffff86139066 RDI=ffffffff85dfe158 RBP=ffffffff85dfe180 RSP=ffff88801c9f7530 R8 =ffffffff86139066 R9 =ffff88801c9f7628 R10=0000000000038001 R11=0000000000020de5 R12=ffffffff85dfe1a4 R13=ffffffff85dfe158 R14=ffffffff85dfe17c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007f163e279900 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=00007f163e82e650 CR3=000000000eb32000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f 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 info registers vcpu 1 RAX=ffff8880134b2e88 RBX=ffff8880134bb068 RCX=1ffff1100263d390 RDX=dffffc0000000000 RSI=ffff88801b011fc0 RDI=ffff8880134bb098 RBP=ffff8880134bb078 RSP=ffff8880103975d8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88801b011f80 R13=0000000000000000 R14=ffff88801ca4c178 R15=ffff88801ca4c130 RIP=ffffffff8184768f 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fcb725e7900 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=00007fcb71a49b30 CR3=000000000c492000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=8896baa710cde71c00000000000ae988 XMM05=c9c8287de527873f0000000000132a70 XMM06=d261392e89ca22cb0000000000131810 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000