syzkaller login: [ 39.070665] BUG: Bad rss-counter state mm:000000003fa4edce type:MM_FILEPAGES val:33 [ 39.071992] BUG: Bad rss-counter state mm:000000003fa4edce type:MM_ANONPAGES val:22 [ 39.162066] ================================================================== [ 39.163052] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.164056] Read of size 8 at addr ffff88800e5f7df0 by task sshd/219 [ 39.164986] [ 39.165219] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.166142] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.167182] Call Trace: [ 39.167522] [ 39.167824] dump_stack_lvl+0x91/0xf0 [ 39.168378] print_report+0xcc/0x620 [ 39.168899] ? __virt_addr_valid+0x102/0x340 [ 39.169494] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.170155] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.170811] kasan_report+0xbe/0xf0 [ 39.171314] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.171970] vma_interval_tree_remove+0xc75/0xec0 [ 39.172628] vma_prepare+0xc54/0x11a0 [ 39.173154] __split_vma+0x5af/0x950 [ 39.173651] ? __pfx___split_vma+0x10/0x10 [ 39.174217] ? find_held_lock+0x2c/0x110 [ 39.174757] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.175345] ? lock_is_held_type+0x9f/0x120 [ 39.175904] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.176544] ? mtree_range_walk+0x632/0x900 [ 39.177119] ? mas_walk+0x5c7/0x7c0 [ 39.177615] do_vmi_munmap+0x1f1/0x2b0 [ 39.178127] mmap_region+0x1f9/0x2660 [ 39.178628] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.179160] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.179902] ? __pfx_lock_acquire+0x10/0x10 [ 39.180482] ? __pfx_mmap_region+0x10/0x10 [ 39.181034] ? security_mmap_addr+0x7d/0xa0 [ 39.181584] ? get_unmapped_area+0x1f5/0x3f0 [ 39.182153] do_mmap+0x854/0xf00 [ 39.182618] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.183130] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.183720] ksys_mmap_pgoff+0x3af/0x500 [ 39.184251] do_syscall_64+0x3f/0x90 [ 39.184748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.185429] RIP: 0033:0x7fbd2020fd82 [ 39.185902] 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 [ 39.188117] RSP: 002b:00007ffdcec87a18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.189076] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbd2020fd82 [ 39.189949] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbd1f649000 [ 39.190818] RBP: 00007fbd1f649000 R08: 0000000000000009 R09: 0000000000001000 [ 39.191694] R10: 0000000000000812 R11: 0000000000000206 R12: 000056540cc82ec0 [ 39.192577] R13: 00007ffdcec87a30 R14: 00007ffdcec87a60 R15: 00007ffdcec87dc0 [ 39.193470] [ 39.193771] [ 39.193992] Allocated by task 212: [ 39.194436] kasan_save_stack+0x22/0x50 [ 39.194956] kasan_set_track+0x25/0x30 [ 39.195464] __kasan_slab_alloc+0x59/0x70 [ 39.196008] kmem_cache_alloc+0x16b/0x370 [ 39.196545] vm_area_dup+0x20/0x160 [ 39.197011] __split_vma+0x170/0x950 [ 39.197491] split_vma+0xc6/0x110 [ 39.197945] mprotect_fixup+0x8d2/0xb30 [ 39.198465] do_mprotect_pkey+0x87e/0xd40 [ 39.199002] __x64_sys_mprotect+0x78/0xc0 [ 39.199542] do_syscall_64+0x3f/0x90 [ 39.200031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.200726] [ 39.200948] Freed by task 212: [ 39.201352] kasan_save_stack+0x22/0x50 [ 39.201871] kasan_set_track+0x25/0x30 [ 39.202384] kasan_save_free_info+0x2b/0x50 [ 39.202932] __kasan_slab_free+0x10a/0x190 [ 39.203485] kmem_cache_free+0x10d/0x4d0 [ 39.204011] rcu_core+0x8c8/0x2860 [ 39.204473] __do_softirq+0x1b7/0x7d4 [ 39.204968] [ 39.205190] Last potentially related work creation: [ 39.205799] kasan_save_stack+0x22/0x50 [ 39.206325] __kasan_record_aux_stack+0x8e/0xa0 [ 39.206908] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.207568] remove_vma+0x139/0x170 [ 39.208028] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.208621] do_vmi_munmap+0x1f1/0x2b0 [ 39.209120] __vm_munmap+0x138/0x3a0 [ 39.209603] __x64_sys_munmap+0x59/0x80 [ 39.210108] do_syscall_64+0x3f/0x90 [ 39.210634] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.211305] [ 39.211523] Second to last potentially related work creation: [ 39.212245] kasan_save_stack+0x22/0x50 [ 39.212769] __kasan_record_aux_stack+0x8e/0xa0 [ 39.213362] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.214026] remove_vma+0x139/0x170 [ 39.214503] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.215075] do_vmi_munmap+0x1f1/0x2b0 [ 39.215579] mmap_region+0x1f9/0x2660 [ 39.216070] do_mmap+0x854/0xf00 [ 39.216518] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.217033] ksys_mmap_pgoff+0x7d/0x500 [ 39.217539] do_syscall_64+0x3f/0x90 [ 39.218038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.218700] [ 39.218925] The buggy address belongs to the object at ffff88800e5f7d98 [ 39.218925] which belongs to the cache vm_area_struct of size 168 [ 39.220458] The buggy address is located 88 bytes inside of [ 39.220458] freed 168-byte region [ffff88800e5f7d98, ffff88800e5f7e40) [ 39.222078] [ 39.222298] The buggy address belongs to the physical page: [ 39.222958] page:000000006f421d19 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5f7 [ 39.224056] memcg:ffff888016f3f701 [ 39.224503] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.225153] page_type: 0xffffffff() [ 39.225611] raw: 0100000000000200 ffff8880087a0c80 ffffea00005b6b00 dead000000000006 [ 39.226532] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016f3f701 [ 39.227437] page dumped because: kasan: bad access detected [ 39.228099] [ 39.228319] Memory state around the buggy address: [ 39.228902] ffff88800e5f7c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 39.229750] ffff88800e5f7d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 39.230594] >ffff88800e5f7d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.231436] ^ [ 39.232238] ffff88800e5f7e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.233078] ffff88800e5f7e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.233935] ================================================================== [ 39.234972] Disabling lock debugging due to kernel taint [ 41.223960] BUG: Bad rss-counter state mm:00000000db7abfc8 type:MM_FILEPAGES val:33 [ 41.224904] BUG: Bad rss-counter state mm:00000000db7abfc8 type:MM_ANONPAGES val:22 [ 41.691644] BUG: Bad rss-counter state mm:000000004d9a18a2 type:MM_FILEPAGES val:33 [ 41.693182] BUG: Bad rss-counter state mm:000000004d9a18a2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22219' (ECDSA) to the list of known hosts. 2023/06/21 00:01:03 fuzzer started 2023/06/21 00:01:03 dialing manager at localhost:36067 2023/06/21 00:01:03 checking machine... 2023/06/21 00:01:03 checking revisions... [ 42.485182] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:01:04 testing simple program... [ 42.529233] cgroup: Unknown subsys name 'net' [ 42.590548] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:01:03 Registers: info registers vcpu 0 RAX=1ffff11001c06eab RBX=ffff88800e037528 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e037558 RBP=ffff88800e0e3b00 RSP=ffff888008d9fc98 R8 =0000000000000001 R9 =ffffed10011b3f87 R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff88800dfaef00 R14=ffffffff8186b835 R15=ffff88800cb52b80 RIP=ffffffff818464e2 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=00007f9b5d85c0b0 CR3=0000000019428000 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=31303a3030203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363037 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a98 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffff88801990fbb0 RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a80 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000021ee8 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888016d851c0 R15=ffff88800e5577a0 RIP=ffffffff8113038e RFL=00000246 [---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 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=00007f0f4a81d8e0 CR3=000000000ec24000 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=756e696c2d34365f3638782f62696c2f XMM01=6f732e6c69747562696c2f756e672d78 XMM02=00312e6f732e6c69747562696c2f756e XMM03=672d78756e696c2d34365f3638782f62 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000