syzkaller login: [ 34.147727] BUG: Bad rss-counter state mm:00000000239a9962 type:MM_FILEPAGES val:33 [ 34.148960] BUG: Bad rss-counter state mm:00000000239a9962 type:MM_ANONPAGES val:22 [ 34.194596] ================================================================== [ 34.195506] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.196455] Read of size 8 at addr ffff88800e3ef058 by task sshd/219 [ 34.197303] [ 34.197663] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.198725] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.199716] Call Trace: [ 34.200055] [ 34.200336] dump_stack_lvl+0x91/0xf0 [ 34.200836] print_report+0xcc/0x620 [ 34.201341] ? __virt_addr_valid+0x102/0x340 [ 34.201903] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.202541] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.203185] kasan_report+0xbe/0xf0 [ 34.203666] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.204305] vma_interval_tree_remove+0xc75/0xec0 [ 34.204925] vma_prepare+0xc54/0x11a0 [ 34.205437] __split_vma+0x5af/0x950 [ 34.205957] ? __pfx___split_vma+0x10/0x10 [ 34.206521] ? find_held_lock+0x2c/0x110 [ 34.207077] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.207658] ? lock_is_held_type+0x9f/0x120 [ 34.208232] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.208895] ? mtree_range_walk+0x632/0x900 [ 34.209476] ? mas_walk+0x5c7/0x7c0 [ 34.210014] do_vmi_munmap+0x1f1/0x2b0 [ 34.210544] mmap_region+0x1f9/0x2660 [ 34.211075] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.211614] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.212372] ? __pfx_lock_acquire+0x10/0x10 [ 34.212950] ? __pfx_mmap_region+0x10/0x10 [ 34.213518] ? security_mmap_addr+0x7d/0xa0 [ 34.214090] ? get_unmapped_area+0x1f5/0x3f0 [ 34.214701] do_mmap+0x854/0xf00 [ 34.215170] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.215672] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.216277] ksys_mmap_pgoff+0x3af/0x500 [ 34.216829] do_syscall_64+0x3f/0x90 [ 34.217332] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.218025] RIP: 0033:0x7fac8de35d82 [ 34.218522] 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 [ 34.220808] RSP: 002b:00007ffd037536e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.221767] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fac8de35d82 [ 34.222688] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fac8d26f000 [ 34.223606] RBP: 00007fac8d26f000 R08: 0000000000000009 R09: 0000000000001000 [ 34.224511] R10: 0000000000000812 R11: 0000000000000206 R12: 00005639c64ecec0 [ 34.225433] R13: 00007ffd03753700 R14: 00007ffd03753730 R15: 00007ffd03753a90 [ 34.226357] [ 34.226681] [ 34.226918] Allocated by task 212: [ 34.227370] kasan_save_stack+0x22/0x50 [ 34.227906] kasan_set_track+0x25/0x30 [ 34.228425] __kasan_slab_alloc+0x59/0x70 [ 34.228998] kmem_cache_alloc+0x16b/0x370 [ 34.229547] vm_area_dup+0x20/0x160 [ 34.230038] __split_vma+0x170/0x950 [ 34.230533] split_vma+0xc6/0x110 [ 34.231026] mprotect_fixup+0x8d2/0xb30 [ 34.231558] do_mprotect_pkey+0x87e/0xd40 [ 34.232139] __x64_sys_mprotect+0x78/0xc0 [ 34.232700] do_syscall_64+0x3f/0x90 [ 34.233212] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.233903] [ 34.234131] Freed by task 212: [ 34.234569] kasan_save_stack+0x22/0x50 [ 34.235122] kasan_set_track+0x25/0x30 [ 34.235641] kasan_save_free_info+0x2b/0x50 [ 34.236217] __kasan_slab_free+0x10a/0x190 [ 34.236802] kmem_cache_free+0x10d/0x4d0 [ 34.237344] rcu_core+0x8c8/0x2860 [ 34.237826] __do_softirq+0x1b7/0x7d4 [ 34.238338] [ 34.238573] Last potentially related work creation: [ 34.239390] kasan_save_stack+0x22/0x50 [ 34.239948] __kasan_record_aux_stack+0x8e/0xa0 [ 34.240559] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.241248] remove_vma+0x139/0x170 [ 34.241732] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.242322] do_vmi_munmap+0x1f1/0x2b0 [ 34.242875] __vm_munmap+0x138/0x3a0 [ 34.243368] __x64_sys_munmap+0x59/0x80 [ 34.243910] do_syscall_64+0x3f/0x90 [ 34.244429] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.245124] [ 34.245354] Second to last potentially related work creation: [ 34.246092] kasan_save_stack+0x22/0x50 [ 34.246649] __kasan_record_aux_stack+0x8e/0xa0 [ 34.247265] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.247950] remove_vma+0x139/0x170 [ 34.248433] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.249052] do_vmi_munmap+0x1f1/0x2b0 [ 34.249558] mmap_region+0x1f9/0x2660 [ 34.250083] do_mmap+0x854/0xf00 [ 34.250556] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.251084] ksys_mmap_pgoff+0x3af/0x500 [ 34.251616] do_syscall_64+0x3f/0x90 [ 34.252129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.252825] [ 34.253055] The buggy address belongs to the object at ffff88800e3ef000 [ 34.253055] which belongs to the cache vm_area_struct of size 168 [ 34.254653] The buggy address is located 88 bytes inside of [ 34.254653] freed 168-byte region [ffff88800e3ef000, ffff88800e3ef0a8) [ 34.256188] [ 34.256415] The buggy address belongs to the physical page: [ 34.257133] page:00000000a06f80ce refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3ef [ 34.258296] memcg:ffff888009866b01 [ 34.258780] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.259456] page_type: 0xffffffff() [ 34.259945] raw: 0100000000000200 ffff88800879fc80 ffffea000039c440 dead000000000002 [ 34.260951] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009866b01 [ 34.261921] page dumped because: kasan: bad access detected [ 34.262627] [ 34.262860] Memory state around the buggy address: [ 34.263459] ffff88800e3eef00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.264333] ffff88800e3eef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.265207] >ffff88800e3ef000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.266067] ^ [ 34.266822] ffff88800e3ef080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 34.267675] ffff88800e3ef100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.268543] ================================================================== [ 34.269480] Disabling lock debugging due to kernel taint [ 36.650996] BUG: Bad rss-counter state mm:00000000cc155e1a type:MM_FILEPAGES val:33 [ 36.651988] BUG: Bad rss-counter state mm:00000000cc155e1a type:MM_ANONPAGES val:22 [ 37.137570] BUG: Bad rss-counter state mm:00000000b31e86b2 type:MM_FILEPAGES val:33 [ 37.138557] BUG: Bad rss-counter state mm:00000000b31e86b2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43059' (ECDSA) to the list of known hosts. 2023/06/19 23:15:55 fuzzer started 2023/06/19 23:15:55 dialing manager at localhost:44161 2023/06/19 23:15:55 checking machine... 2023/06/19 23:15:55 checking revisions... [ 37.747121] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:15:55 testing simple program... [ 37.797333] cgroup: Unknown subsys name 'net' [ 37.857021] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:15:52 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff813ad6cf RDX=0000000000003ad6 RSI=0000000000003ad6 RDI=ffffffff864f6718 RBP=ffff888006a6f408 RSP=ffff888006a6f340 R8 =0000000000000000 R9 =ffff888006a6f3f0 R10=0000000000038001 R11=0000000000003c0d R12=ffff888006a6f410 R13=ffff888006a6f3f8 R14=ffff888006a6f3f1 R15=ffff888006a6f3b0 RIP=ffffffff8113077a RFL=00000212 [----A--] 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 00007f84e600d900 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=00007f84e546ebb0 CR3=000000000b3dc000 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=032672d37da18f4400000000000ae988 XMM05=d19e8fbe4fe8047f00000000001369c8 XMM06=dfcdbad4f1609c370000000000135860 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff856528e0 RCX=0000000000000000 RDX=1ffffffff0aca531 RSI=ffffffff814c842f RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888016827338 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007fdd4e04be07 R13=0000000000000000 R14=ffffffff85652988 R15=0000000000002800 RIP=ffffffff814c844b 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 00007fdd4d4b9900 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=00007fdd4d488008 CR3=000000000ebc4000 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=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