syzkaller login: [ 31.005319] BUG: Bad rss-counter state mm:00000000bd407cdc type:MM_FILEPAGES val:33 [ 31.006313] BUG: Bad rss-counter state mm:00000000bd407cdc type:MM_ANONPAGES val:22 [ 31.179645] ================================================================== [ 31.180562] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.181484] Read of size 8 at addr ffff88800f507140 by task sshd/221 [ 31.182235] [ 31.182451] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.183385] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.184362] Call Trace: [ 31.184680] [ 31.184960] dump_stack_lvl+0x91/0xf0 [ 31.185449] print_report+0xcc/0x620 [ 31.185935] ? __virt_addr_valid+0x102/0x340 [ 31.186484] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.187087] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.187714] kasan_report+0xbe/0xf0 [ 31.188190] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.188812] vma_interval_tree_remove+0xc75/0xec0 [ 31.189406] vma_prepare+0xc54/0x11a0 [ 31.189890] __split_vma+0x5af/0x950 [ 31.190360] ? __pfx___split_vma+0x10/0x10 [ 31.190885] ? find_held_lock+0x2c/0x110 [ 31.191414] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.191989] ? lock_is_held_type+0x9f/0x120 [ 31.192526] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.193123] ? mtree_range_walk+0x632/0x900 [ 31.193666] ? mas_walk+0x5c7/0x7c0 [ 31.194131] do_vmi_munmap+0x1f1/0x2b0 [ 31.194623] mmap_region+0x1f9/0x2660 [ 31.195094] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.195603] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.196313] ? __pfx_lock_acquire+0x10/0x10 [ 31.196833] ? __pfx_mmap_region+0x10/0x10 [ 31.197353] ? security_mmap_addr+0x7d/0xa0 [ 31.197875] ? get_unmapped_area+0x1f5/0x3f0 [ 31.198422] do_mmap+0x854/0xf00 [ 31.198853] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.199340] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.199916] ksys_mmap_pgoff+0x3af/0x500 [ 31.200433] do_syscall_64+0x3f/0x90 [ 31.200908] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.201554] RIP: 0033:0x7fe83f6ebd82 [ 31.202012] 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 [ 31.204121] RSP: 002b:00007ffc75b5ce38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.205009] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe83f6ebd82 [ 31.205846] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe83eb25000 [ 31.206693] RBP: 00007fe83eb25000 R08: 0000000000000009 R09: 0000000000001000 [ 31.207527] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cde97e4f60 [ 31.208374] R13: 00007ffc75b5ce50 R14: 00007ffc75b5ce80 R15: 00007ffc75b5d1e0 [ 31.209211] [ 31.209501] [ 31.209712] Allocated by task 214: [ 31.210137] kasan_save_stack+0x22/0x50 [ 31.210634] kasan_set_track+0x25/0x30 [ 31.211122] __kasan_slab_alloc+0x59/0x70 [ 31.211641] kmem_cache_alloc+0x16b/0x370 [ 31.212151] vm_area_dup+0x20/0x160 [ 31.212596] __split_vma+0x170/0x950 [ 31.213057] split_vma+0xc6/0x110 [ 31.213494] mprotect_fixup+0x8d2/0xb30 [ 31.213987] do_mprotect_pkey+0x87e/0xd40 [ 31.214500] __x64_sys_mprotect+0x78/0xc0 [ 31.215018] do_syscall_64+0x3f/0x90 [ 31.215484] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.216125] [ 31.216337] Freed by task 214: [ 31.216724] kasan_save_stack+0x22/0x50 [ 31.217220] kasan_set_track+0x25/0x30 [ 31.217707] kasan_save_free_info+0x2b/0x50 [ 31.218226] __kasan_slab_free+0x10a/0x190 [ 31.218750] kmem_cache_free+0x10d/0x4d0 [ 31.219248] rcu_core+0x8c8/0x2860 [ 31.219714] __do_softirq+0x1b7/0x7d4 [ 31.220184] [ 31.220396] Last potentially related work creation: [ 31.220970] kasan_save_stack+0x22/0x50 [ 31.221466] __kasan_record_aux_stack+0x8e/0xa0 [ 31.222027] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.222660] remove_vma+0x139/0x170 [ 31.223100] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.223661] do_vmi_munmap+0x1f1/0x2b0 [ 31.224135] __vm_munmap+0x138/0x3a0 [ 31.224591] __x64_sys_munmap+0x59/0x80 [ 31.225079] do_syscall_64+0x3f/0x90 [ 31.225549] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.226178] [ 31.226392] The buggy address belongs to the object at ffff88800f5070e8 [ 31.226392] which belongs to the cache vm_area_struct of size 168 [ 31.227839] The buggy address is located 88 bytes inside of [ 31.227839] freed 168-byte region [ffff88800f5070e8, ffff88800f507190) [ 31.229219] [ 31.229433] The buggy address belongs to the physical page: [ 31.230084] page:00000000591b9591 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf507 [ 31.231147] memcg:ffff88800cb1b101 [ 31.231586] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.232272] page_type: 0xffffffff() [ 31.232718] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.233631] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb1b101 [ 31.234534] page dumped because: kasan: bad access detected [ 31.235199] [ 31.235416] Memory state around the buggy address: [ 31.235992] ffff88800f507000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.236836] ffff88800f507080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.237672] >ffff88800f507100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.238506] ^ [ 31.239128] ffff88800f507180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.239982] ffff88800f507200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.240828] ================================================================== [ 31.241796] Disabling lock debugging due to kernel taint [ 33.471300] BUG: Bad rss-counter state mm:0000000049e15404 type:MM_FILEPAGES val:33 [ 33.472418] BUG: Bad rss-counter state mm:0000000049e15404 type:MM_ANONPAGES val:22 [ 33.979678] BUG: Bad rss-counter state mm:000000001ca4684d type:MM_FILEPAGES val:33 [ 33.980854] BUG: Bad rss-counter state mm:000000001ca4684d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41093' (ECDSA) to the list of known hosts. 2023/06/20 12:27:39 fuzzer started 2023/06/20 12:27:39 dialing manager at localhost:36067 2023/06/20 12:27:39 checking machine... 2023/06/20 12:27:39 checking revisions... [ 34.643594] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:27:39 testing simple program... [ 34.695661] cgroup: Unknown subsys name 'net' [ 34.741502] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:27:39 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=0000000000039500 RCX=ffffffff8137ada1 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff8880167e7ed8 RSP=ffff8880167e7da8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=ffff88806ce39500 R13=ffff88801587d1c0 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451cd8f RFL=00000092 [--S-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 00007f84bd761900 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=00007f84bdd16650 CR3=000000001a34a000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=1ffff11002cfcf36 RCX=ffffffff812d8f13 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff8880167e79a0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000000 R14=ffff8880169281a0 R15=0000000000000000 RIP=ffffffff812d8f20 RFL=00000247 [---Z-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 00007f84bd761900 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=00007f84bdd18618 CR3=000000001a34a000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000