syzkaller login: [ 42.939634] BUG: Bad rss-counter state mm:000000008e9fe3dd type:MM_FILEPAGES val:33 [ 42.940352] BUG: Bad rss-counter state mm:000000008e9fe3dd type:MM_ANONPAGES val:22 [ 43.114408] ================================================================== [ 43.115582] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.116936] Read of size 8 at addr ffff888016961310 by task sshd/225 [ 43.117807] [ 43.118045] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.119003] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.120091] Call Trace: [ 43.120476] [ 43.120793] dump_stack_lvl+0x91/0xf0 [ 43.121332] print_report+0xcc/0x620 [ 43.121860] ? __virt_addr_valid+0x102/0x340 [ 43.122468] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.123159] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.123812] kasan_report+0xbe/0xf0 [ 43.124360] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.125032] vma_interval_tree_remove+0xc75/0xec0 [ 43.125675] vma_prepare+0xc54/0x11a0 [ 43.126184] __split_vma+0x5af/0x950 [ 43.126713] ? __pfx___split_vma+0x10/0x10 [ 43.127275] ? find_held_lock+0x2c/0x110 [ 43.127829] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.128470] ? lock_is_held_type+0x9f/0x120 [ 43.129043] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.129682] ? mtree_range_walk+0x632/0x900 [ 43.130264] ? mas_walk+0x5c7/0x7c0 [ 43.130787] do_vmi_munmap+0x1f1/0x2b0 [ 43.131312] mmap_region+0x1f9/0x2660 [ 43.131826] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.132401] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.133161] ? __pfx_lock_acquire+0x10/0x10 [ 43.133728] ? __pfx_mmap_region+0x10/0x10 [ 43.134294] ? security_mmap_addr+0x7d/0xa0 [ 43.134877] ? get_unmapped_area+0x1f5/0x3f0 [ 43.135461] do_mmap+0x854/0xf00 [ 43.135927] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.136487] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.137086] ksys_mmap_pgoff+0x3af/0x500 [ 43.137624] do_syscall_64+0x3f/0x90 [ 43.138133] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.138852] RIP: 0033:0x7fc74985cd82 [ 43.139346] 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 [ 43.141635] RSP: 002b:00007ffc938dafa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.142617] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc74985cd82 [ 43.143519] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc748c96000 [ 43.144458] RBP: 00007fc748c96000 R08: 0000000000000009 R09: 0000000000001000 [ 43.145349] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b2c0ab1f60 [ 43.146239] R13: 00007ffc938dafc0 R14: 00007ffc938daff0 R15: 00007ffc938db350 [ 43.147171] [ 43.147488] [ 43.147717] Allocated by task 218: [ 43.148197] kasan_save_stack+0x22/0x50 [ 43.148758] kasan_set_track+0x25/0x30 [ 43.149287] __kasan_slab_alloc+0x59/0x70 [ 43.149841] kmem_cache_alloc+0x16b/0x370 [ 43.150390] vm_area_dup+0x20/0x160 [ 43.150901] __split_vma+0x170/0x950 [ 43.151395] split_vma+0xc6/0x110 [ 43.151864] mprotect_fixup+0x8d2/0xb30 [ 43.152439] do_mprotect_pkey+0x87e/0xd40 [ 43.152999] __x64_sys_mprotect+0x78/0xc0 [ 43.153553] do_syscall_64+0x3f/0x90 [ 43.154060] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.154763] [ 43.154990] Freed by task 218: [ 43.155402] kasan_save_stack+0x22/0x50 [ 43.155933] kasan_set_track+0x25/0x30 [ 43.156501] kasan_save_free_info+0x2b/0x50 [ 43.157078] __kasan_slab_free+0x10a/0x190 [ 43.157653] kmem_cache_free+0x10d/0x4d0 [ 43.158245] rcu_core+0x8c8/0x2860 [ 43.158736] __do_softirq+0x1b7/0x7d4 [ 43.159247] [ 43.159477] Last potentially related work creation: [ 43.160097] kasan_save_stack+0x22/0x50 [ 43.160674] __kasan_record_aux_stack+0x8e/0xa0 [ 43.161293] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.161982] remove_vma+0x139/0x170 [ 43.162469] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.163104] do_vmi_munmap+0x1f1/0x2b0 [ 43.163621] __vm_munmap+0x138/0x3a0 [ 43.164115] __x64_sys_munmap+0x59/0x80 [ 43.164682] do_syscall_64+0x3f/0x90 [ 43.165185] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.165868] [ 43.166098] The buggy address belongs to the object at ffff8880169612b8 [ 43.166098] which belongs to the cache vm_area_struct of size 168 [ 43.167732] The buggy address is located 88 bytes inside of [ 43.167732] freed 168-byte region [ffff8880169612b8, ffff888016961360) [ 43.169356] [ 43.169602] The buggy address belongs to the physical page: [ 43.170351] page:000000000173ff07 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16961 [ 43.171607] memcg:ffff8880168ccb01 [ 43.172090] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.172896] page_type: 0xffffffff() [ 43.173471] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 43.174510] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880168ccb01 [ 43.175569] page dumped because: kasan: bad access detected [ 43.176368] [ 43.176616] Memory state around the buggy address: [ 43.177272] ffff888016961200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 43.178243] ffff888016961280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 43.179228] >ffff888016961300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 43.180227] ^ [ 43.180767] ffff888016961380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 43.181737] ffff888016961400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 43.182719] ================================================================== [ 43.183779] Disabling lock debugging due to kernel taint [ 45.847123] BUG: Bad rss-counter state mm:000000005218259a type:MM_FILEPAGES val:33 [ 45.848148] BUG: Bad rss-counter state mm:000000005218259a type:MM_ANONPAGES val:22 [ 46.328471] BUG: Bad rss-counter state mm:0000000072c7736f type:MM_FILEPAGES val:33 [ 46.329423] BUG: Bad rss-counter state mm:0000000072c7736f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8025' (ECDSA) to the list of known hosts. 2023/06/20 06:35:35 fuzzer started 2023/06/20 06:35:35 dialing manager at localhost:44161 2023/06/20 06:35:35 checking machine... 2023/06/20 06:35:35 checking revisions... [ 47.051790] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:35:35 testing simple program... [ 47.106417] cgroup: Unknown subsys name 'net' [ 47.153319] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:35:30 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81806192 RDI=ffff88806ce3de20 RBP=ffff88806ce3de20 RSP=ffff888019c3f7a0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=ffff8880094275f0 R12=ffff88800844f780 R13=ffffea00002509c0 R14=0000000000000000 R15=0000000000000002 RIP=ffffffff812d860e RFL=00000046 [---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 00007ff91db76900 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=00007efca935d8c0 CR3=000000001cd4c000 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=00000000ff00000000000000000000ff XMM01=00000000010000000000000000000000 XMM02=494c4700362e322e325f4342494c4700 XMM03=00000000000000000000000000004700 XMM04=4342494c4700362e322e325f4342494c XMM05=00007ff91e12ff6000007ff91e2e9950 XMM06=00007ff91e2e944000007ff91e2e8f20 XMM07=00007ff91dc3312000007ff91dc32b10 XMM08=00007ff91dc325f000007ff91dc32060 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000014 RCX=ffffffff8184cf3a RDX=ffff88800f011b40 RSI=0000000000000000 RDI=0000000000000006 RBP=ffff88801ccf1214 RSP=ffff888019eafb98 R8 =0000000000000006 R9 =ffff88801ccf1200 R10=ffffffff84800000 R11=00000000000b6996 R12=ffff88801ccf1200 R13=0000000000000000 R14=0000000000000001 R15=ffffea0000733c00 RIP=ffffffff814c07eb RFL=00000287 [--S--PC] 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 00007f4271261900 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=00007ffe1c65d000 CR3=000000001b42c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000