syzkaller login: [ 29.957728] BUG: Bad rss-counter state mm:0000000064ce1b46 type:MM_FILEPAGES val:33 [ 29.958854] BUG: Bad rss-counter state mm:0000000064ce1b46 type:MM_ANONPAGES val:22 [ 30.143369] ================================================================== [ 30.144389] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.145407] Read of size 8 at addr ffff88801a3e66b0 by task sshd/220 [ 30.146295] [ 30.146524] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.147430] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.148449] Call Trace: [ 30.148809] [ 30.149114] dump_stack_lvl+0x91/0xf0 [ 30.149627] print_report+0xcc/0x620 [ 30.150139] ? __virt_addr_valid+0x102/0x340 [ 30.150722] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.151374] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.152026] kasan_report+0xbe/0xf0 [ 30.152524] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.153216] vma_interval_tree_remove+0xc75/0xec0 [ 30.153879] vma_prepare+0xc54/0x11a0 [ 30.154395] __split_vma+0x5af/0x950 [ 30.154905] ? __pfx___split_vma+0x10/0x10 [ 30.155468] ? find_held_lock+0x2c/0x110 [ 30.156028] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.156653] ? lock_is_held_type+0x9f/0x120 [ 30.157326] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.158134] ? mtree_range_walk+0x632/0x900 [ 30.158887] ? mas_walk+0x5c7/0x7c0 [ 30.159514] do_vmi_munmap+0x1f1/0x2b0 [ 30.160106] mmap_region+0x1f9/0x2660 [ 30.160689] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.161325] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.162210] ? __pfx_lock_acquire+0x10/0x10 [ 30.162874] ? __pfx_mmap_region+0x10/0x10 [ 30.163533] ? security_mmap_addr+0x7d/0xa0 [ 30.164200] ? get_unmapped_area+0x1f5/0x3f0 [ 30.164905] do_mmap+0x854/0xf00 [ 30.165449] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.166061] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.166757] ksys_mmap_pgoff+0x3af/0x500 [ 30.167393] do_syscall_64+0x3f/0x90 [ 30.167984] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.168793] RIP: 0033:0x7fa16537cd82 [ 30.169356] 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 [ 30.172028] RSP: 002b:00007ffe438730a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.173146] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa16537cd82 [ 30.174204] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa1647b6000 [ 30.175254] RBP: 00007fa1647b6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.176309] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dd3a63dd90 [ 30.177383] R13: 00007ffe438730c0 R14: 00007ffe438730f0 R15: 00007ffe43873450 [ 30.178458] [ 30.178826] [ 30.179098] Allocated by task 212: [ 30.179664] kasan_save_stack+0x22/0x50 [ 30.180369] kasan_set_track+0x25/0x30 [ 30.180982] __kasan_slab_alloc+0x59/0x70 [ 30.181554] kmem_cache_alloc+0x16b/0x370 [ 30.182128] vm_area_dup+0x20/0x160 [ 30.182629] __split_vma+0x170/0x950 [ 30.183161] split_vma+0xc6/0x110 [ 30.183657] mprotect_fixup+0x8d2/0xb30 [ 30.184221] do_mprotect_pkey+0x87e/0xd40 [ 30.184845] __x64_sys_mprotect+0x78/0xc0 [ 30.185412] do_syscall_64+0x3f/0x90 [ 30.185933] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.186638] [ 30.186879] Freed by task 210: [ 30.187308] kasan_save_stack+0x22/0x50 [ 30.187867] kasan_set_track+0x25/0x30 [ 30.188539] kasan_save_free_info+0x2b/0x50 [ 30.189279] __kasan_slab_free+0x10a/0x190 [ 30.189984] kmem_cache_free+0x10d/0x4d0 [ 30.190594] rcu_core+0x8c8/0x2860 [ 30.191093] __do_softirq+0x1b7/0x7d4 [ 30.191598] [ 30.191852] Last potentially related work creation: [ 30.192515] kasan_save_stack+0x22/0x50 [ 30.193123] __kasan_record_aux_stack+0x8e/0xa0 [ 30.193785] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.194500] remove_vma+0x139/0x170 [ 30.195005] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.195613] do_vmi_munmap+0x1f1/0x2b0 [ 30.196160] __vm_munmap+0x138/0x3a0 [ 30.196664] __x64_sys_munmap+0x59/0x80 [ 30.197231] do_syscall_64+0x3f/0x90 [ 30.197746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.198455] [ 30.198684] The buggy address belongs to the object at ffff88801a3e6658 [ 30.198684] which belongs to the cache vm_area_struct of size 168 [ 30.200297] The buggy address is located 88 bytes inside of [ 30.200297] freed 168-byte region [ffff88801a3e6658, ffff88801a3e6700) [ 30.201873] [ 30.202112] The buggy address belongs to the physical page: [ 30.202843] page:0000000018b2bc26 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a3e6 [ 30.204041] memcg:ffff88800f144a01 [ 30.204582] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.205346] page_type: 0xffffffff() [ 30.205852] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.206926] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f144a01 [ 30.207947] page dumped because: kasan: bad access detected [ 30.208662] [ 30.208910] Memory state around the buggy address: [ 30.209564] ffff88801a3e6580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.210507] ffff88801a3e6600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.211445] >ffff88801a3e6680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.212394] ^ [ 30.213179] ffff88801a3e6700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.214193] ffff88801a3e6780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.215211] ================================================================== [ 30.216573] Disabling lock debugging due to kernel taint [ 32.268365] BUG: Bad rss-counter state mm:00000000b18a13ad type:MM_FILEPAGES val:33 [ 32.269220] BUG: Bad rss-counter state mm:00000000b18a13ad type:MM_ANONPAGES val:22 [ 32.758172] BUG: Bad rss-counter state mm:00000000beaf695d type:MM_FILEPAGES val:33 [ 32.759409] BUG: Bad rss-counter state mm:00000000beaf695d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16202' (ECDSA) to the list of known hosts. 2023/06/19 13:30:15 fuzzer started 2023/06/19 13:30:15 dialing manager at localhost:44161 2023/06/19 13:30:15 checking machine... 2023/06/19 13:30:15 checking revisions... [ 33.485903] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:30:15 testing simple program... [ 33.529601] cgroup: Unknown subsys name 'net' [ 33.567061] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:30:13 Registers: info registers vcpu 0 RAX=00007ffd8a0d9d70 RBX=0000000000000000 RCX=0000000000000004 RDX=00007ffd8a0d9d50 RSI=0000000000000025 RDI=00007fa9cc912a84 RBP=00007ffd8a0d9c00 RSP=00007ffd8a0d96a8 R8 =0000000000000000 R9 =0000000000000008 R10=0000560947f62cf0 R11=0000000000000000 R12=00007ffd8a0d9c10 R13=00007fa9cc912a84 R14=00007ffd8a0d9d50 R15=00000000fbad8001 RIP=00007fa9cc33672a RFL=00000287 [--S--PC] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa9cbde3900 00000000 00000000 GS =0000 0000000000000000 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=00007fa9cc39b0b0 CR3=000000000e97c000 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=25252525252525252525252525252525 XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=707465675f6c697475646f6d6d61705f XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007ffd7ae48e68 CR3=000000000c5fc000 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=2034313a30333a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a30333a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000