syzkaller login: [ 37.362545] BUG: Bad rss-counter state mm:00000000e416ff0b type:MM_FILEPAGES val:33 [ 37.363771] BUG: Bad rss-counter state mm:00000000e416ff0b type:MM_ANONPAGES val:22 [ 37.588340] ================================================================== [ 37.589317] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.590318] Read of size 8 at addr ffff88801822f6b0 by task sshd/222 [ 37.591240] [ 37.591474] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.592392] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.593479] Call Trace: [ 37.593818] [ 37.594121] dump_stack_lvl+0x91/0xf0 [ 37.594639] print_report+0xcc/0x620 [ 37.595156] ? __virt_addr_valid+0x102/0x340 [ 37.595745] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.596399] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.597082] kasan_report+0xbe/0xf0 [ 37.597588] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.598249] vma_interval_tree_remove+0xc75/0xec0 [ 37.598890] vma_prepare+0xc54/0x11a0 [ 37.599397] __split_vma+0x5af/0x950 [ 37.599903] ? __pfx___split_vma+0x10/0x10 [ 37.600467] ? find_held_lock+0x2c/0x110 [ 37.601046] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.601649] ? lock_is_held_type+0x9f/0x120 [ 37.602221] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.602886] ? mtree_range_walk+0x632/0x900 [ 37.603480] ? mas_walk+0x5c7/0x7c0 [ 37.603986] do_vmi_munmap+0x1f1/0x2b0 [ 37.604508] mmap_region+0x1f9/0x2660 [ 37.605037] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.605695] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.606458] ? __pfx_lock_acquire+0x10/0x10 [ 37.607035] ? __pfx_mmap_region+0x10/0x10 [ 37.607601] ? security_mmap_addr+0x7d/0xa0 [ 37.608165] ? get_unmapped_area+0x1f5/0x3f0 [ 37.608755] do_mmap+0x854/0xf00 [ 37.609243] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.609772] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.610370] ksys_mmap_pgoff+0x3af/0x500 [ 37.610910] do_syscall_64+0x3f/0x90 [ 37.611419] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.612115] RIP: 0033:0x7f20288d8d82 [ 37.612604] 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 [ 37.614888] RSP: 002b:00007ffd17580dd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.615849] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f20288d8d82 [ 37.616757] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2027d12000 [ 37.617667] RBP: 00007f2027d12000 R08: 0000000000000009 R09: 0000000000001000 [ 37.618564] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556397a46b20 [ 37.619459] R13: 00007ffd17580df0 R14: 00007ffd17580e20 R15: 00007ffd17581180 [ 37.620369] [ 37.620685] [ 37.620913] Allocated by task 212: [ 37.621376] kasan_save_stack+0x22/0x50 [ 37.621926] kasan_set_track+0x25/0x30 [ 37.622462] __kasan_slab_alloc+0x59/0x70 [ 37.623025] kmem_cache_alloc+0x16b/0x370 [ 37.623578] vm_area_dup+0x20/0x160 [ 37.624066] __split_vma+0x170/0x950 [ 37.624565] split_vma+0xc6/0x110 [ 37.625057] mprotect_fixup+0x8d2/0xb30 [ 37.625593] do_mprotect_pkey+0x87e/0xd40 [ 37.626151] __x64_sys_mprotect+0x78/0xc0 [ 37.626707] do_syscall_64+0x3f/0x90 [ 37.627218] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.627902] [ 37.628134] Freed by task 212: [ 37.628551] kasan_save_stack+0x22/0x50 [ 37.629107] kasan_set_track+0x25/0x30 [ 37.629638] kasan_save_free_info+0x2b/0x50 [ 37.630207] __kasan_slab_free+0x10a/0x190 [ 37.630785] kmem_cache_free+0x10d/0x4d0 [ 37.631331] rcu_core+0x8c8/0x2860 [ 37.631819] __do_softirq+0x1b7/0x7d4 [ 37.632330] [ 37.632560] Last potentially related work creation: [ 37.633206] kasan_save_stack+0x22/0x50 [ 37.633745] __kasan_record_aux_stack+0x8e/0xa0 [ 37.634370] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.635062] remove_vma+0x139/0x170 [ 37.635547] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.636154] do_vmi_munmap+0x1f1/0x2b0 [ 37.636676] __vm_munmap+0x138/0x3a0 [ 37.637218] __x64_sys_munmap+0x59/0x80 [ 37.637752] do_syscall_64+0x3f/0x90 [ 37.638265] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.638959] [ 37.639195] Second to last potentially related work creation: [ 37.639931] kasan_save_stack+0x22/0x50 [ 37.640469] __kasan_record_aux_stack+0x8e/0xa0 [ 37.641090] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.641774] remove_vma+0x139/0x170 [ 37.642250] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.642844] do_vmi_munmap+0x1f1/0x2b0 [ 37.643360] mmap_region+0x1f9/0x2660 [ 37.643866] do_mmap+0x854/0xf00 [ 37.644325] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.644843] ksys_mmap_pgoff+0x3af/0x500 [ 37.645383] do_syscall_64+0x3f/0x90 [ 37.645889] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.646566] [ 37.646796] The buggy address belongs to the object at ffff88801822f658 [ 37.646796] which belongs to the cache vm_area_struct of size 168 [ 37.648364] The buggy address is located 88 bytes inside of [ 37.648364] freed 168-byte region [ffff88801822f658, ffff88801822f700) [ 37.649877] [ 37.650107] The buggy address belongs to the physical page: [ 37.650808] page:00000000bfa37ec8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1822f [ 37.651971] memcg:ffff888018236001 [ 37.652431] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.653156] page_type: 0xffffffff() [ 37.653633] raw: 0100000000000200 ffff88800879fc80 ffffea00003aefc0 dead000000000006 [ 37.654623] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018236001 [ 37.655599] page dumped because: kasan: bad access detected [ 37.656344] [ 37.656578] Memory state around the buggy address: [ 37.657235] ffff88801822f580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.658173] ffff88801822f600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 37.659106] >ffff88801822f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.660045] ^ [ 37.660686] ffff88801822f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 37.661632] ffff88801822f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 37.662563] ================================================================== [ 37.663746] Disabling lock debugging due to kernel taint [ 39.785649] BUG: Bad rss-counter state mm:00000000e8400409 type:MM_FILEPAGES val:33 [ 39.786648] BUG: Bad rss-counter state mm:00000000e8400409 type:MM_ANONPAGES val:22 [ 40.181700] BUG: Bad rss-counter state mm:000000001f54b81b type:MM_FILEPAGES val:33 [ 40.182803] BUG: Bad rss-counter state mm:000000001f54b81b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49616' (ECDSA) to the list of known hosts. 2023/06/20 08:45:43 fuzzer started 2023/06/20 08:45:43 dialing manager at localhost:44161 2023/06/20 08:45:43 checking machine... 2023/06/20 08:45:43 checking revisions... [ 40.954831] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:45:43 testing simple program... [ 40.999526] cgroup: Unknown subsys name 'net' [ 41.053014] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:45:34 Registers: info registers vcpu 0 RAX=ffff88800f788001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800f787701 RSI=ffff88800f787728 RDI=ffff88800f7873b8 RBP=ffff88800f787728 RSP=ffff88800f787310 R8 =ffffffff8613773a R9 =ffff88800f7873e8 R10=0000000000038001 R11=0000000000020de7 R12=0000000000000008 R13=ffff88800f780000 R14=ffff88800f787730 R15=ffff88800f7873a8 RIP=ffffffff811304ce RFL=00000282 [--S----] 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 00007f17a1de6900 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=00007ffdb6972000 CR3=000000001a306000 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=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 info registers vcpu 1 RAX=1ffffffff0baf27b RBX=ffffffff85d793d8 RCX=ffffffff810001cd RDX=0000000000000000 RSI=ffffffff860723cc RDI=ffffffff85d793d4 RBP=ffffffff85d793d8 RSP=ffff88806cf099e0 R8 =ffffffff860723cc R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000000000 R12=ffffffff85d793d8 R13=ffffffff85d793d4 R14=ffffffff85d793d4 R15=dffffc0000000000 RIP=ffffffff8112fc7a RFL=00000216 [----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 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=00007ff14fca74a8 CR3=000000000e932000 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=2032343a35343a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a35343a3830203032 XMM08=00000000000000000000004600000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000