syzkaller login: [ 30.500836] sshd (213) used greatest stack depth: 24128 bytes left [ 30.501885] BUG: Bad rss-counter state mm:000000006cea90e4 type:MM_FILEPAGES val:33 [ 30.503600] BUG: Bad rss-counter state mm:000000006cea90e4 type:MM_ANONPAGES val:22 [ 30.668234] ================================================================== [ 30.669134] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.670061] Read of size 8 at addr ffff88801aa5bd08 by task sshd/220 [ 30.670816] [ 30.671032] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.672022] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.673008] Call Trace: [ 30.673327] [ 30.673610] dump_stack_lvl+0x91/0xf0 [ 30.674095] print_report+0xcc/0x620 [ 30.674577] ? __virt_addr_valid+0x102/0x340 [ 30.675124] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.675735] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.676355] kasan_report+0xbe/0xf0 [ 30.676821] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.677437] vma_interval_tree_remove+0xc75/0xec0 [ 30.678040] vma_prepare+0xc54/0x11a0 [ 30.678516] __split_vma+0x5af/0x950 [ 30.678981] ? __pfx___split_vma+0x10/0x10 [ 30.679509] ? find_held_lock+0x2c/0x110 [ 30.680021] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.680599] ? lock_is_held_type+0x9f/0x120 [ 30.681137] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.681749] ? mtree_range_walk+0x632/0x900 [ 30.682305] ? mas_walk+0x5c7/0x7c0 [ 30.682781] do_vmi_munmap+0x1f1/0x2b0 [ 30.683273] mmap_region+0x1f9/0x2660 [ 30.683752] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.684278] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.684981] ? __pfx_lock_acquire+0x10/0x10 [ 30.685505] ? __pfx_mmap_region+0x10/0x10 [ 30.686028] ? security_mmap_addr+0x7d/0xa0 [ 30.686557] ? get_unmapped_area+0x1f5/0x3f0 [ 30.687105] do_mmap+0x854/0xf00 [ 30.687537] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.688026] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.688590] ksys_mmap_pgoff+0x3af/0x500 [ 30.689096] do_syscall_64+0x3f/0x90 [ 30.689627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.690490] RIP: 0033:0x7f1792256d82 [ 30.690948] 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 [ 30.693103] RSP: 002b:00007ffcf0543878 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.693996] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1792256d82 [ 30.694843] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1791690000 [ 30.695675] RBP: 00007f1791690000 R08: 0000000000000009 R09: 0000000000001000 [ 30.696522] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e6ef6f8d90 [ 30.697355] R13: 00007ffcf0543890 R14: 00007ffcf05438c0 R15: 00007ffcf0543c20 [ 30.698204] [ 30.698495] [ 30.698708] Allocated by task 213: [ 30.699138] kasan_save_stack+0x22/0x50 [ 30.699640] kasan_set_track+0x25/0x30 [ 30.700146] __kasan_slab_alloc+0x59/0x70 [ 30.700669] kmem_cache_alloc+0x16b/0x370 [ 30.701182] vm_area_dup+0x20/0x160 [ 30.701637] __split_vma+0x170/0x950 [ 30.702103] split_vma+0xc6/0x110 [ 30.702540] mprotect_fixup+0x8d2/0xb30 [ 30.703041] do_mprotect_pkey+0x87e/0xd40 [ 30.703552] __x64_sys_mprotect+0x78/0xc0 [ 30.704072] do_syscall_64+0x3f/0x90 [ 30.704556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.705202] [ 30.705415] Freed by task 213: [ 30.705810] kasan_save_stack+0x22/0x50 [ 30.706309] kasan_set_track+0x25/0x30 [ 30.706799] kasan_save_free_info+0x2b/0x50 [ 30.707327] __kasan_slab_free+0x10a/0x190 [ 30.707854] kmem_cache_free+0x10d/0x4d0 [ 30.708377] rcu_core+0x8c8/0x2860 [ 30.708816] __do_softirq+0x1b7/0x7d4 [ 30.709288] [ 30.709500] Last potentially related work creation: [ 30.710078] kasan_save_stack+0x22/0x50 [ 30.710575] __kasan_record_aux_stack+0x8e/0xa0 [ 30.711143] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.711781] remove_vma+0x139/0x170 [ 30.712238] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.712796] do_vmi_munmap+0x1f1/0x2b0 [ 30.713279] __vm_munmap+0x138/0x3a0 [ 30.713740] __x64_sys_munmap+0x59/0x80 [ 30.714227] do_syscall_64+0x3f/0x90 [ 30.714699] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.715331] [ 30.715550] The buggy address belongs to the object at ffff88801aa5bcb0 [ 30.715550] which belongs to the cache vm_area_struct of size 168 [ 30.717038] The buggy address is located 88 bytes inside of [ 30.717038] freed 168-byte region [ffff88801aa5bcb0, ffff88801aa5bd58) [ 30.718430] [ 30.718643] The buggy address belongs to the physical page: [ 30.719296] page:00000000ace30978 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1aa5b [ 30.720376] memcg:ffff888018f2c901 [ 30.720795] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.721429] page_type: 0xffffffff() [ 30.721874] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.722800] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018f2c901 [ 30.723697] page dumped because: kasan: bad access detected [ 30.724361] [ 30.724577] Memory state around the buggy address: [ 30.725151] ffff88801aa5bc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.725993] ffff88801aa5bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.726835] >ffff88801aa5bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.727684] ^ [ 30.728137] ffff88801aa5bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.728995] ffff88801aa5be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.729844] ================================================================== [ 30.731109] Disabling lock debugging due to kernel taint [ 32.667915] BUG: Bad rss-counter state mm:000000002341e2d8 type:MM_FILEPAGES val:33 [ 32.669179] BUG: Bad rss-counter state mm:000000002341e2d8 type:MM_ANONPAGES val:22 [ 33.230830] BUG: Bad rss-counter state mm:000000001cffe1df type:MM_FILEPAGES val:33 [ 33.231984] BUG: Bad rss-counter state mm:000000001cffe1df type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49701' (ECDSA) to the list of known hosts. 2023/06/20 20:40:04 fuzzer started 2023/06/20 20:40:04 dialing manager at localhost:36067 2023/06/20 20:40:04 checking machine... 2023/06/20 20:40:04 checking revisions... [ 33.886724] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:40:04 testing simple program... [ 33.934418] cgroup: Unknown subsys name 'net' [ 33.983941] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:40:04 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11002b02eff RSI=ffffffff8186b928 RDI=ffff8880158177a0 RBP=ffff8880158177f8 RSP=ffff888015817730 R8 =0000000000000001 R9 =ffff8880158177e0 R10=0000000000038001 R11=0000000000038ddb R12=ffff888015817868 R13=0000000000000000 R14=ffff888016bab680 R15=ffff8880158177a0 RIP=ffffffff8113062c 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 00007f612736d900 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=00007f61267aeaa0 CR3=00000000141fc000 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=d89825fa78f3a94400000000000ae988 XMM05=35f8bfd38bc22cd500000000001342c8 XMM06=19e9129bd510f2350000000000133160 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f46e9a7b650 CR3=000000000ef08000 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=2034303a30343a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a30343a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000