syzkaller login: [ 52.079610] BUG: Bad rss-counter state mm:0000000097dfdc19 type:MM_FILEPAGES val:33 [ 52.081017] BUG: Bad rss-counter state mm:0000000097dfdc19 type:MM_ANONPAGES val:22 [ 52.239774] ================================================================== [ 52.240873] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 52.241842] Read of size 8 at addr ffff888016939d08 by task sshd/221 [ 52.242725] [ 52.242948] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 52.243839] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 52.244845] Call Trace: [ 52.245164] [ 52.245451] dump_stack_lvl+0x91/0xf0 [ 52.245955] print_report+0xcc/0x620 [ 52.246451] ? __virt_addr_valid+0x102/0x340 [ 52.247007] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.247639] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.248262] kasan_report+0xbe/0xf0 [ 52.248747] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.249375] vma_interval_tree_remove+0xc75/0xec0 [ 52.249990] vma_prepare+0xc54/0x11a0 [ 52.250470] __split_vma+0x5af/0x950 [ 52.250958] ? __pfx___split_vma+0x10/0x10 [ 52.251489] ? find_held_lock+0x2c/0x110 [ 52.252021] do_vmi_align_munmap+0x2ba/0x11f0 [ 52.252611] ? lock_is_held_type+0x9f/0x120 [ 52.253150] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 52.253768] ? mtree_range_walk+0x632/0x900 [ 52.254325] ? mas_walk+0x5c7/0x7c0 [ 52.254804] do_vmi_munmap+0x1f1/0x2b0 [ 52.255301] mmap_region+0x1f9/0x2660 [ 52.255783] ? vm_mmap_pgoff+0x15c/0x3a0 [ 52.256295] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 52.257024] ? __pfx_lock_acquire+0x10/0x10 [ 52.257558] ? __pfx_mmap_region+0x10/0x10 [ 52.258092] ? security_mmap_addr+0x7d/0xa0 [ 52.258630] ? get_unmapped_area+0x1f5/0x3f0 [ 52.259184] do_mmap+0x854/0xf00 [ 52.259627] vm_mmap_pgoff+0x1a6/0x3a0 [ 52.260126] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 52.260716] ksys_mmap_pgoff+0x3af/0x500 [ 52.261228] do_syscall_64+0x3f/0x90 [ 52.261707] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.262358] RIP: 0033:0x7f338eaded82 [ 52.262811] 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 [ 52.264953] RSP: 002b:00007ffc5a6e6a28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 52.265880] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f338eaded82 [ 52.266757] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f338df18000 [ 52.267621] RBP: 00007f338df18000 R08: 0000000000000009 R09: 0000000000001000 [ 52.268496] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e221a51ec0 [ 52.269384] R13: 00007ffc5a6e6a40 R14: 00007ffc5a6e6a70 R15: 00007ffc5a6e6dd0 [ 52.270255] [ 52.270553] [ 52.270771] Allocated by task 213: [ 52.271211] kasan_save_stack+0x22/0x50 [ 52.271729] kasan_set_track+0x25/0x30 [ 52.272220] __kasan_slab_alloc+0x59/0x70 [ 52.272764] kmem_cache_alloc+0x16b/0x370 [ 52.273296] vm_area_dup+0x20/0x160 [ 52.273749] __split_vma+0x170/0x950 [ 52.274217] split_vma+0xc6/0x110 [ 52.274668] mprotect_fixup+0x8d2/0xb30 [ 52.275192] do_mprotect_pkey+0x87e/0xd40 [ 52.275716] __x64_sys_mprotect+0x78/0xc0 [ 52.276246] do_syscall_64+0x3f/0x90 [ 52.276743] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.277401] [ 52.277624] Freed by task 213: [ 52.278023] kasan_save_stack+0x22/0x50 [ 52.278525] kasan_set_track+0x25/0x30 [ 52.279031] kasan_save_free_info+0x2b/0x50 [ 52.279560] __kasan_slab_free+0x10a/0x190 [ 52.280090] kmem_cache_free+0x10d/0x4d0 [ 52.280618] rcu_core+0x8c8/0x2860 [ 52.281063] __do_softirq+0x1b7/0x7d4 [ 52.281544] [ 52.281758] Last potentially related work creation: [ 52.282338] kasan_save_stack+0x22/0x50 [ 52.282852] __kasan_record_aux_stack+0x8e/0xa0 [ 52.283425] __call_rcu_common.constprop.0+0x6a/0xb90 [ 52.284070] remove_vma+0x139/0x170 [ 52.284523] do_vmi_align_munmap+0xd4a/0x11f0 [ 52.285109] do_vmi_munmap+0x1f1/0x2b0 [ 52.285609] __vm_munmap+0x138/0x3a0 [ 52.286084] __x64_sys_munmap+0x59/0x80 [ 52.286588] do_syscall_64+0x3f/0x90 [ 52.287063] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.287711] [ 52.287924] The buggy address belongs to the object at ffff888016939cb0 [ 52.287924] which belongs to the cache vm_area_struct of size 168 [ 52.289393] The buggy address is located 88 bytes inside of [ 52.289393] freed 168-byte region [ffff888016939cb0, ffff888016939d58) [ 52.290821] [ 52.291040] The buggy address belongs to the physical page: [ 52.291708] page:00000000d65013d8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16939 [ 52.292819] memcg:ffff88800d91d701 [ 52.293242] flags: 0x100000000000200(slab|node=0|zone=1) [ 52.293897] page_type: 0xffffffff() [ 52.294348] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 52.295263] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d91d701 [ 52.296174] page dumped because: kasan: bad access detected [ 52.296851] [ 52.297072] Memory state around the buggy address: [ 52.297651] ffff888016939c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 52.298510] ffff888016939c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 52.299375] >ffff888016939d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 52.300227] ^ [ 52.300670] ffff888016939d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 52.301528] ffff888016939e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 52.302378] ================================================================== [ 52.303382] Disabling lock debugging due to kernel taint [ 55.011593] BUG: Bad rss-counter state mm:0000000083b4d17b type:MM_FILEPAGES val:33 [ 55.012762] BUG: Bad rss-counter state mm:0000000083b4d17b type:MM_ANONPAGES val:22 [ 55.471848] BUG: Bad rss-counter state mm:00000000c36d0ffa type:MM_FILEPAGES val:33 [ 55.473065] BUG: Bad rss-counter state mm:00000000c36d0ffa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64068' (ECDSA) to the list of known hosts. 2023/06/19 22:05:17 fuzzer started 2023/06/19 22:05:17 dialing manager at localhost:44161 2023/06/19 22:05:17 checking machine... 2023/06/19 22:05:17 checking revisions... [ 56.109357] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:05:18 testing simple program... [ 56.150098] cgroup: Unknown subsys name 'net' [ 56.204527] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:04:55 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000a5b RDI=ffffffff848cf840 RBP=ffffffff848cf840 RSP=ffff8880182a7b00 R8 =0000000000000006 R9 =00000ffffffff000 R10=0000000000001000 R11=0000000000000000 R12=0000000000000a5b R13=ffff8880182a7dc8 R14=ffff8880182a7e00 R15=dffffc0000000000 RIP=ffffffff8450bdd4 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 00007f44440f6900 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=00007ffeb4419000 CR3=0000000009792000 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=6c697473206e61632073726573552023 XMM01=20656c706f657020726568746f20776f XMM02=0000000000000000000000000000ffff XMM03=796e6120776f6c6c6120746f6e206f74 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=6120776f6c6c6120746f6e206f740000 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff86088c1a RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf099d8 R8 =ffffffff86088c1e R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130ad6 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=00007f47e8a4d870 CR3=000000000d9be000 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=8de81157ea3ef4a4b44343526199be48 XMM02=2c67c8bc2e329bc3000000000011c4c0 XMM03=fb795ef6d65770560000000000123928 XMM04=210a1d6f48d96eb000000000000ae988 XMM05=e4cb8bb95a7664b60000000000133510 XMM06=c291bd5c70af25b90000000000133398 XMM07=e042d86d42eb936e0000000000123ba8 XMM08=09bde0d10f107c9e000000000011c520 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000