syzkaller login: [ 38.775540] BUG: Bad rss-counter state mm:000000002a695b99 type:MM_FILEPAGES val:33 [ 38.776731] BUG: Bad rss-counter state mm:000000002a695b99 type:MM_ANONPAGES val:22 [ 38.814320] ================================================================== [ 38.815305] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.816341] Read of size 8 at addr ffff88800d609310 by task sshd/218 [ 38.817117] [ 38.817336] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.818201] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.819180] Call Trace: [ 38.819501] <TASK> [ 38.819786] dump_stack_lvl+0x91/0xf0 [ 38.820320] print_report+0xcc/0x620 [ 38.820807] ? __virt_addr_valid+0x102/0x340 [ 38.821354] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.821976] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.822589] kasan_report+0xbe/0xf0 [ 38.823076] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.823699] vma_interval_tree_remove+0xc75/0xec0 [ 38.824325] vma_prepare+0xc54/0x11a0 [ 38.824821] __split_vma+0x5af/0x950 [ 38.825289] ? __pfx___split_vma+0x10/0x10 [ 38.825819] ? find_held_lock+0x2c/0x110 [ 38.826347] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.826920] ? lock_is_held_type+0x9f/0x120 [ 38.827455] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.828104] ? mtree_range_walk+0x632/0x900 [ 38.828659] ? mas_walk+0x5c7/0x7c0 [ 38.829134] do_vmi_munmap+0x1f1/0x2b0 [ 38.829627] mmap_region+0x1f9/0x2660 [ 38.830108] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.830622] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.831341] ? __pfx_lock_acquire+0x10/0x10 [ 38.831875] ? __pfx_mmap_region+0x10/0x10 [ 38.832439] ? security_mmap_addr+0x7d/0xa0 [ 38.832975] ? get_unmapped_area+0x1f5/0x3f0 [ 38.833543] do_mmap+0x854/0xf00 [ 38.833983] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.834489] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.835051] ksys_mmap_pgoff+0x3af/0x500 [ 38.835563] do_syscall_64+0x3f/0x90 [ 38.836074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.836725] RIP: 0033:0x7f6f4f80dd82 [ 38.837182] 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 [ 38.839309] RSP: 002b:00007ffd05c76e98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.840274] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6f4f80dd82 [ 38.841208] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6f4ec47000 [ 38.842157] RBP: 00007f6f4ec47000 R08: 0000000000000009 R09: 0000000000001000 [ 38.843115] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cf7eb0bd90 [ 38.844089] R13: 00007ffd05c76eb0 R14: 00007ffd05c76ee0 R15: 00007ffd05c77240 [ 38.845039] </TASK> [ 38.845375] [ 38.845616] Allocated by task 211: [ 38.846106] kasan_save_stack+0x22/0x50 [ 38.846673] kasan_set_track+0x25/0x30 [ 38.847216] __kasan_slab_alloc+0x59/0x70 [ 38.847802] kmem_cache_alloc+0x16b/0x370 [ 38.848409] vm_area_dup+0x20/0x160 [ 38.848906] __split_vma+0x170/0x950 [ 38.849438] split_vma+0xc6/0x110 [ 38.849938] mprotect_fixup+0x8d2/0xb30 [ 38.850500] do_mprotect_pkey+0x87e/0xd40 [ 38.851086] __x64_sys_mprotect+0x78/0xc0 [ 38.851666] do_syscall_64+0x3f/0x90 [ 38.852202] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.852909] [ 38.853153] Freed by task 211: [ 38.853582] kasan_save_stack+0x22/0x50 [ 38.854148] kasan_set_track+0x25/0x30 [ 38.854683] kasan_save_free_info+0x2b/0x50 [ 38.855285] __kasan_slab_free+0x10a/0x190 [ 38.855872] kmem_cache_free+0x10d/0x4d0 [ 38.856464] rcu_core+0x8c8/0x2860 [ 38.856966] __do_softirq+0x1b7/0x7d4 [ 38.857511] [ 38.857745] Last potentially related work creation: [ 38.858413] kasan_save_stack+0x22/0x50 [ 38.858969] __kasan_record_aux_stack+0x8e/0xa0 [ 38.859620] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.860378] remove_vma+0x139/0x170 [ 38.860874] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.861498] do_vmi_munmap+0x1f1/0x2b0 [ 38.862028] __vm_munmap+0x138/0x3a0 [ 38.862553] __x64_sys_munmap+0x59/0x80 [ 38.863106] do_syscall_64+0x3f/0x90 [ 38.863634] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.864355] [ 38.864588] Second to last potentially related work creation: [ 38.865347] kasan_save_stack+0x22/0x50 [ 38.865896] __kasan_record_aux_stack+0x8e/0xa0 [ 38.866508] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.867205] remove_vma+0x139/0x170 [ 38.867705] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.868367] do_vmi_munmap+0x1f1/0x2b0 [ 38.868901] mmap_region+0x1f9/0x2660 [ 38.869429] do_mmap+0x854/0xf00 [ 38.869897] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.870442] ksys_mmap_pgoff+0x3af/0x500 [ 38.870995] do_syscall_64+0x3f/0x90 [ 38.871515] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.872252] [ 38.872499] The buggy address belongs to the object at ffff88800d6092b8 [ 38.872499] which belongs to the cache vm_area_struct of size 168 [ 38.874152] The buggy address is located 88 bytes inside of [ 38.874152] freed 168-byte region [ffff88800d6092b8, ffff88800d609360) [ 38.875725] [ 38.875984] The buggy address belongs to the physical page: [ 38.876746] page:00000000aae5254d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd609 [ 38.877980] memcg:ffff88800e096f01 [ 38.878446] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.879163] page_type: 0xffffffff() [ 38.879666] raw: 0100000000000200 ffff8880087a0c80 ffffea0000695140 dead000000000008 [ 38.880717] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e096f01 [ 38.881703] page dumped because: kasan: bad access detected [ 38.882452] [ 38.882693] Memory state around the buggy address: [ 38.883347] ffff88800d609200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.884344] ffff88800d609280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.885290] >ffff88800d609300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.886259] ^ [ 38.886798] ffff88800d609380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.887749] ffff88800d609400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 38.888720] ================================================================== [ 38.889898] Disabling lock debugging due to kernel taint [ 40.709741] BUG: Bad rss-counter state mm:0000000043087587 type:MM_FILEPAGES val:33 [ 40.710413] BUG: Bad rss-counter state mm:0000000043087587 type:MM_ANONPAGES val:22 [ 41.111768] BUG: Bad rss-counter state mm:00000000e85b0eca type:MM_FILEPAGES val:33 [ 41.112789] BUG: Bad rss-counter state mm:00000000e85b0eca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29379' (ECDSA) to the list of known hosts. 2023/06/21 05:12:09 fuzzer started 2023/06/21 05:12:09 dialing manager at localhost:36067 2023/06/21 05:12:09 checking machine... 2023/06/21 05:12:09 checking revisions... [ 41.747576] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:12:09 testing simple program... [ 41.795930] cgroup: Unknown subsys name 'net' [ 41.860073] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:12:09 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=00007f3201ad7500 CR3=000000000e656000 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=17111dd9e0d985b3e14c01e2e98ec074 XMM02=000000000011b190ec2efd57dc4c00df XMM03=0000000000121b50d90dbfbdc7a4d6b7 XMM04=cb627ed19251e63f00000000000ae988 XMM05=099fe47b2b4177ff0000000000133bc0 XMM06=bdf2e299e47b49d500000000001328f0 XMM07=e042d86d42eb936e0000000000121e28 XMM08=d90dbfbdc7a4d6b7000000000011b1f0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000255 RCX=ffffffff8171afa3 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888016d9d1c0 RSP=ffff88801c9dfe70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=00007f3285cdf968 R14=0000000000000000 R15=0000000000000040 RIP=ffffffff814c0249 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f328513d900 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=00007f3285cdf968 CR3=000000000fe3a000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000