syzkaller login: [ 41.451617] BUG: Bad rss-counter state mm:000000006f74fa6e type:MM_FILEPAGES val:33 [ 41.453004] BUG: Bad rss-counter state mm:000000006f74fa6e type:MM_ANONPAGES val:22 [ 41.604307] ================================================================== [ 41.605404] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.606437] Read of size 8 at addr ffff88801668d880 by task sshd/220 [ 41.607344] [ 41.607561] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.608398] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.609399] Call Trace: [ 41.609716] [ 41.610021] dump_stack_lvl+0x91/0xf0 [ 41.610505] print_report+0xcc/0x620 [ 41.610999] ? __virt_addr_valid+0x102/0x340 [ 41.611547] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.612164] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.612773] kasan_report+0xbe/0xf0 [ 41.613239] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.613890] vma_interval_tree_remove+0xc75/0xec0 [ 41.614495] vma_prepare+0xc54/0x11a0 [ 41.614989] __split_vma+0x5af/0x950 [ 41.615465] ? __pfx___split_vma+0x10/0x10 [ 41.615995] ? find_held_lock+0x2c/0x110 [ 41.616518] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.617083] ? lock_is_held_type+0x9f/0x120 [ 41.617655] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.618261] ? mtree_range_walk+0x632/0x900 [ 41.618824] ? mas_walk+0x5c7/0x7c0 [ 41.619301] do_vmi_munmap+0x1f1/0x2b0 [ 41.619794] mmap_region+0x1f9/0x2660 [ 41.620283] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.620796] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.621553] ? __pfx_lock_acquire+0x10/0x10 [ 41.622097] ? __pfx_mmap_region+0x10/0x10 [ 41.622642] ? security_mmap_addr+0x7d/0xa0 [ 41.623192] ? get_unmapped_area+0x1f5/0x3f0 [ 41.623771] do_mmap+0x854/0xf00 [ 41.624231] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.624730] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.625321] ksys_mmap_pgoff+0x3af/0x500 [ 41.625842] do_syscall_64+0x3f/0x90 [ 41.626322] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.626966] RIP: 0033:0x7f0e6ec47d82 [ 41.627424] 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 [ 41.629535] RSP: 002b:00007ffc6bcb9aa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.630446] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0e6ec47d82 [ 41.631305] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0e6e081000 [ 41.632140] RBP: 00007f0e6e081000 R08: 0000000000000009 R09: 0000000000001000 [ 41.632977] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555b73bbbf70 [ 41.633830] R13: 00007ffc6bcb9ac0 R14: 00007ffc6bcb9af0 R15: 00007ffc6bcb9e50 [ 41.634679] [ 41.634968] [ 41.635193] Allocated by task 213: [ 41.635620] kasan_save_stack+0x22/0x50 [ 41.636128] kasan_set_track+0x25/0x30 [ 41.636625] __kasan_slab_alloc+0x59/0x70 [ 41.637160] kmem_cache_alloc+0x16b/0x370 [ 41.637707] vm_area_dup+0x20/0x160 [ 41.638168] __split_vma+0x170/0x950 [ 41.638636] split_vma+0xc6/0x110 [ 41.639069] mprotect_fixup+0x8d2/0xb30 [ 41.639564] do_mprotect_pkey+0x87e/0xd40 [ 41.640075] __x64_sys_mprotect+0x78/0xc0 [ 41.640584] do_syscall_64+0x3f/0x90 [ 41.641046] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.641685] [ 41.641896] Freed by task 213: [ 41.642279] kasan_save_stack+0x22/0x50 [ 41.642771] kasan_set_track+0x25/0x30 [ 41.643264] kasan_save_free_info+0x2b/0x50 [ 41.643786] __kasan_slab_free+0x10a/0x190 [ 41.644317] kmem_cache_free+0x10d/0x4d0 [ 41.644819] rcu_core+0x8c8/0x2860 [ 41.645259] __do_softirq+0x1b7/0x7d4 [ 41.645743] [ 41.645955] Last potentially related work creation: [ 41.646524] kasan_save_stack+0x22/0x50 [ 41.647016] __kasan_record_aux_stack+0x8e/0xa0 [ 41.647574] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.648201] remove_vma+0x139/0x170 [ 41.648645] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.649199] do_vmi_munmap+0x1f1/0x2b0 [ 41.649690] __vm_munmap+0x138/0x3a0 [ 41.650145] __x64_sys_munmap+0x59/0x80 [ 41.650661] do_syscall_64+0x3f/0x90 [ 41.651157] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.651846] [ 41.652080] The buggy address belongs to the object at ffff88801668d828 [ 41.652080] which belongs to the cache vm_area_struct of size 168 [ 41.653571] The buggy address is located 88 bytes inside of [ 41.653571] freed 168-byte region [ffff88801668d828, ffff88801668d8d0) [ 41.654943] [ 41.655163] The buggy address belongs to the physical page: [ 41.655979] page:00000000ec721b6f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1668d [ 41.657100] memcg:ffff888019e63c01 [ 41.657561] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.658238] page_type: 0xffffffff() [ 41.658697] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.659630] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e63c01 [ 41.660555] page dumped because: kasan: bad access detected [ 41.661249] [ 41.661494] Memory state around the buggy address: [ 41.662084] ffff88801668d780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 41.662950] ffff88801668d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 41.663820] >ffff88801668d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 41.664692] ^ [ 41.665105] ffff88801668d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.665967] ffff88801668d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 41.666823] ================================================================== [ 41.667879] Disabling lock debugging due to kernel taint [ 43.680019] BUG: Bad rss-counter state mm:000000009a4c3bf8 type:MM_FILEPAGES val:33 [ 43.681445] BUG: Bad rss-counter state mm:000000009a4c3bf8 type:MM_ANONPAGES val:22 [ 44.161811] BUG: Bad rss-counter state mm:0000000011658efb type:MM_FILEPAGES val:33 [ 44.163074] BUG: Bad rss-counter state mm:0000000011658efb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52646' (ECDSA) to the list of known hosts. 2023/06/20 04:22:46 fuzzer started 2023/06/20 04:22:47 dialing manager at localhost:44161 2023/06/20 04:22:47 checking machine... 2023/06/20 04:22:47 checking revisions... [ 44.928996] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:22:47 testing simple program... [ 44.988681] cgroup: Unknown subsys name 'net' [ 45.042736] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:22:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09a98 RCX=0000000000000002 RDX=1ffff1100d9c1353 RSI=ffff888016bf71e0 RDI=ffff88806ce09a98 RBP=ffff888016bf71e0 RSP=ffff88806ce099f0 R8 =ffffffff864b115c R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b523e R12=0000000000000008 R13=ffff88806ce09ae0 R14=ffff888016bf71e8 R15=ffff88806ce09a98 RIP=ffffffff8113042a RFL=00000202 [-------] 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 00007fb54a050700 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=00007f9352103740 CR3=0000000017d44000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732036343a3232 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383332 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=0000000000000000 RBX=000055877ebf86f0 RCX=00007efeb32e06c3 RDX=00007ffd27f6f890 RSI=0000000000000004 RDI=000055877ebf8c20 RBP=0000000000000000 RSP=00007ffd27f6f968 R8 =000055877ebe0eb0 R9 =00007ffd27f68ce8 R10=000055877e813d21 R11=0000000000000246 R12=00000000ffffffe3 R13=000055877e80c1c0 R14=00007ffd27f6fd00 R15=00007ffd27f6fab0 RIP=00007efeb3922760 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007efeb2dfd900 00000000 00000000 GS =0000 0000000000000000 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=00007ffd27f6a000 CR3=000000001c93a000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000