syzkaller login: [ 31.043289] BUG: Bad rss-counter state mm:000000007c5bbc26 type:MM_FILEPAGES val:33 [ 31.044272] BUG: Bad rss-counter state mm:000000007c5bbc26 type:MM_ANONPAGES val:22 [ 31.192774] ================================================================== [ 31.193686] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.194618] Read of size 8 at addr ffff8880147a93f8 by task sshd/220 [ 31.195489] [ 31.195739] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.196602] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.197594] Call Trace: [ 31.197922] [ 31.198211] dump_stack_lvl+0x91/0xf0 [ 31.198700] print_report+0xcc/0x620 [ 31.199194] ? __virt_addr_valid+0x102/0x340 [ 31.199764] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.200392] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.201025] kasan_report+0xbe/0xf0 [ 31.201505] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.202131] vma_interval_tree_remove+0xc75/0xec0 [ 31.202724] vma_prepare+0xc54/0x11a0 [ 31.203199] __split_vma+0x5af/0x950 [ 31.203667] ? __pfx___split_vma+0x10/0x10 [ 31.204199] ? find_held_lock+0x2c/0x110 [ 31.204735] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.205298] ? lock_is_held_type+0x9f/0x120 [ 31.205844] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.206455] ? mtree_range_walk+0x632/0x900 [ 31.207007] ? mas_walk+0x5c7/0x7c0 [ 31.207477] do_vmi_munmap+0x1f1/0x2b0 [ 31.207964] mmap_region+0x1f9/0x2660 [ 31.208446] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.208981] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.209685] ? __pfx_lock_acquire+0x10/0x10 [ 31.210211] ? __pfx_mmap_region+0x10/0x10 [ 31.210734] ? security_mmap_addr+0x7d/0xa0 [ 31.211259] ? get_unmapped_area+0x1f5/0x3f0 [ 31.211805] do_mmap+0x854/0xf00 [ 31.212243] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.212740] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.213297] ksys_mmap_pgoff+0x3af/0x500 [ 31.213803] do_syscall_64+0x3f/0x90 [ 31.214274] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.214920] RIP: 0033:0x7f356db6cd82 [ 31.215373] 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 [ 31.217499] RSP: 002b:00007fffc2b365a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.218401] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f356db6cd82 [ 31.219243] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f356cfa6000 [ 31.220090] RBP: 00007f356cfa6000 R08: 0000000000000009 R09: 0000000000001000 [ 31.220940] R10: 0000000000000812 R11: 0000000000000206 R12: 000055991003fec0 [ 31.221787] R13: 00007fffc2b365c0 R14: 00007fffc2b365f0 R15: 00007fffc2b36950 [ 31.222630] [ 31.222922] [ 31.223136] Allocated by task 213: [ 31.223571] kasan_save_stack+0x22/0x50 [ 31.224074] kasan_set_track+0x25/0x30 [ 31.224566] __kasan_slab_alloc+0x59/0x70 [ 31.225100] kmem_cache_alloc+0x16b/0x370 [ 31.225611] vm_area_dup+0x20/0x160 [ 31.226068] __split_vma+0x170/0x950 [ 31.226528] split_vma+0xc6/0x110 [ 31.226964] mprotect_fixup+0x8d2/0xb30 [ 31.227459] do_mprotect_pkey+0x87e/0xd40 [ 31.227975] __x64_sys_mprotect+0x78/0xc0 [ 31.228489] do_syscall_64+0x3f/0x90 [ 31.228970] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.229607] [ 31.229820] Freed by task 213: [ 31.230209] kasan_save_stack+0x22/0x50 [ 31.230718] kasan_set_track+0x25/0x30 [ 31.231206] kasan_save_free_info+0x2b/0x50 [ 31.231737] __kasan_slab_free+0x10a/0x190 [ 31.232261] kmem_cache_free+0x10d/0x4d0 [ 31.232784] rcu_core+0x8c8/0x2860 [ 31.233224] __do_softirq+0x1b7/0x7d4 [ 31.233709] [ 31.233925] Last potentially related work creation: [ 31.234505] kasan_save_stack+0x22/0x50 [ 31.235017] __kasan_record_aux_stack+0x8e/0xa0 [ 31.235590] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.236227] remove_vma+0x139/0x170 [ 31.236689] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.237328] do_vmi_munmap+0x1f1/0x2b0 [ 31.237812] __vm_munmap+0x138/0x3a0 [ 31.238273] __x64_sys_munmap+0x59/0x80 [ 31.238771] do_syscall_64+0x3f/0x90 [ 31.239239] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.239877] [ 31.240091] The buggy address belongs to the object at ffff8880147a93a0 [ 31.240091] which belongs to the cache vm_area_struct of size 168 [ 31.241585] The buggy address is located 88 bytes inside of [ 31.241585] freed 168-byte region [ffff8880147a93a0, ffff8880147a9448) [ 31.242970] [ 31.243182] The buggy address belongs to the physical page: [ 31.243840] page:00000000f0ef35bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x147a9 [ 31.244942] memcg:ffff888016062501 [ 31.245374] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.246020] page_type: 0xffffffff() [ 31.246473] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.247389] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016062501 [ 31.248291] page dumped because: kasan: bad access detected [ 31.248960] [ 31.249175] Memory state around the buggy address: [ 31.249743] ffff8880147a9280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.250603] ffff8880147a9300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.251446] >ffff8880147a9380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.252295] ^ [ 31.253148] ffff8880147a9400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.253998] ffff8880147a9480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.254844] ================================================================== [ 31.255824] Disabling lock debugging due to kernel taint [ 34.042668] BUG: Bad rss-counter state mm:00000000fbaf318c type:MM_FILEPAGES val:33 [ 34.043769] BUG: Bad rss-counter state mm:00000000fbaf318c type:MM_ANONPAGES val:22 [ 34.605070] BUG: Bad rss-counter state mm:000000006b935e23 type:MM_FILEPAGES val:33 [ 34.606221] BUG: Bad rss-counter state mm:000000006b935e23 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28004' (ECDSA) to the list of known hosts. 2023/06/20 12:33:41 fuzzer started 2023/06/20 12:33:41 dialing manager at localhost:36067 2023/06/20 12:33:41 checking machine... 2023/06/20 12:33:41 checking revisions... [ 35.228939] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:33:41 testing simple program... [ 35.276010] cgroup: Unknown subsys name 'net' [ 35.341631] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:33:40 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fa8d98ef860 CR3=00000000144c2000 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=be5ffce93a856d8dac49ca0a4f279ec1 XMM02=ec2efd57dc4c00df000000000011ccf8 XMM03=e337cd4bf9a9de72000000000011cdc8 XMM04=85568ad22dd46f0700000000000ae988 XMM05=e4cb8bb95a7664b60000000000131358 XMM06=4f960a834f8b7b5200000000001301c0 XMM07=e042d86d42eb936e0000000000121750 XMM08=e337cd4bf9a9de72000000000011cdc8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=ffff8880146afa00 RSI=0000000000000000 RDI=ffff8880146af6a8 RBP=ffff8880146a8000 RSP=ffff8880146af668 R8 =ffffffff86138eb4 R9 =ffff8880146af6d8 R10=0000000000038001 R11=0000000000020d9c R12=ffff8880146af6f8 R13=ffff8880146af6e0 R14=ffff8880146af9f8 R15=ffff8880146af698 RIP=ffffffff81130930 RFL=00000296 [--S-AP-] 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 00007f649fc69900 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=00007ffff4066000 CR3=000000001c9e0000 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