syzkaller login: [ 38.837665] BUG: Bad rss-counter state mm:0000000067633468 type:MM_FILEPAGES val:33 [ 38.838861] BUG: Bad rss-counter state mm:0000000067633468 type:MM_ANONPAGES val:22 [ 38.878363] ================================================================== [ 38.879376] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.880471] Read of size 8 at addr ffff88800fd38140 by task sshd/220 [ 38.881336] [ 38.881688] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.882621] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.883585] Call Trace: [ 38.884007] [ 38.884346] dump_stack_lvl+0x91/0xf0 [ 38.884839] print_report+0xcc/0x620 [ 38.885320] ? __virt_addr_valid+0x102/0x340 [ 38.885882] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.886493] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.887131] kasan_report+0xbe/0xf0 [ 38.887705] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.888319] vma_interval_tree_remove+0xc75/0xec0 [ 38.889018] vma_prepare+0xc54/0x11a0 [ 38.889601] __split_vma+0x5af/0x950 [ 38.890149] ? __pfx___split_vma+0x10/0x10 [ 38.890677] ? find_held_lock+0x2c/0x110 [ 38.891274] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.891922] ? lock_is_held_type+0x9f/0x120 [ 38.892538] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.893288] ? mtree_range_walk+0x632/0x900 [ 38.893862] ? mas_walk+0x5c7/0x7c0 [ 38.894337] do_vmi_munmap+0x1f1/0x2b0 [ 38.894826] mmap_region+0x1f9/0x2660 [ 38.895308] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.895822] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.896532] ? __pfx_lock_acquire+0x10/0x10 [ 38.897059] ? __pfx_mmap_region+0x10/0x10 [ 38.897586] ? security_mmap_addr+0x7d/0xa0 [ 38.898134] ? get_unmapped_area+0x1f5/0x3f0 [ 38.898682] do_mmap+0x854/0xf00 [ 38.899122] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.899628] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.900190] ksys_mmap_pgoff+0x3af/0x500 [ 38.900699] do_syscall_64+0x3f/0x90 [ 38.901191] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.901865] RIP: 0033:0x7f75a6164d82 [ 38.902324] 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 [ 38.904455] RSP: 002b:00007ffebe25f668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.905374] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f75a6164d82 [ 38.906239] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f75a559e000 [ 38.907094] RBP: 00007f75a559e000 R08: 0000000000000009 R09: 0000000000001000 [ 38.907948] R10: 0000000000000812 R11: 0000000000000206 R12: 00005591e7044ec0 [ 38.908796] R13: 00007ffebe25f680 R14: 00007ffebe25f6b0 R15: 00007ffebe25fa10 [ 38.909681] [ 38.909972] [ 38.910192] Allocated by task 213: [ 38.910629] kasan_save_stack+0x22/0x50 [ 38.911132] kasan_set_track+0x25/0x30 [ 38.911624] __kasan_slab_alloc+0x59/0x70 [ 38.912148] kmem_cache_alloc+0x16b/0x370 [ 38.912662] vm_area_dup+0x20/0x160 [ 38.913112] __split_vma+0x170/0x950 [ 38.913576] split_vma+0xc6/0x110 [ 38.914032] mprotect_fixup+0x8d2/0xb30 [ 38.914532] do_mprotect_pkey+0x87e/0xd40 [ 38.915050] __x64_sys_mprotect+0x78/0xc0 [ 38.915576] do_syscall_64+0x3f/0x90 [ 38.916052] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.916692] [ 38.916910] Freed by task 213: [ 38.917303] kasan_save_stack+0x22/0x50 [ 38.917826] kasan_set_track+0x25/0x30 [ 38.918321] kasan_save_free_info+0x2b/0x50 [ 38.918848] __kasan_slab_free+0x10a/0x190 [ 38.919379] kmem_cache_free+0x10d/0x4d0 [ 38.919888] rcu_core+0x8c8/0x2860 [ 38.920333] __do_softirq+0x1b7/0x7d4 [ 38.920810] [ 38.921025] Last potentially related work creation: [ 38.921627] kasan_save_stack+0x22/0x50 [ 38.922140] __kasan_record_aux_stack+0x8e/0xa0 [ 38.922736] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.923481] remove_vma+0x139/0x170 [ 38.923950] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.924534] do_vmi_munmap+0x1f1/0x2b0 [ 38.925026] __vm_munmap+0x138/0x3a0 [ 38.925501] __x64_sys_munmap+0x59/0x80 [ 38.926019] do_syscall_64+0x3f/0x90 [ 38.926491] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.927146] [ 38.927363] The buggy address belongs to the object at ffff88800fd380e8 [ 38.927363] which belongs to the cache vm_area_struct of size 168 [ 38.928853] The buggy address is located 88 bytes inside of [ 38.928853] freed 168-byte region [ffff88800fd380e8, ffff88800fd38190) [ 38.930281] [ 38.930498] The buggy address belongs to the physical page: [ 38.931161] page:00000000d9936305 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd38 [ 38.932252] memcg:ffff888018ec9601 [ 38.932683] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.933339] page_type: 0xffffffff() [ 38.933808] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.934723] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018ec9601 [ 38.935620] page dumped because: kasan: bad access detected [ 38.936282] [ 38.936497] Memory state around the buggy address: [ 38.937077] ffff88800fd38000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.937944] ffff88800fd38080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 38.938803] >ffff88800fd38100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.939651] ^ [ 38.940282] ffff88800fd38180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.941144] ffff88800fd38200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.942004] ================================================================== [ 38.942968] Disabling lock debugging due to kernel taint [ 41.109652] BUG: Bad rss-counter state mm:000000000673f7e3 type:MM_FILEPAGES val:33 [ 41.110820] BUG: Bad rss-counter state mm:000000000673f7e3 type:MM_ANONPAGES val:22 [ 41.432398] BUG: Bad rss-counter state mm:000000001daacd99 type:MM_FILEPAGES val:33 [ 41.433163] BUG: Bad rss-counter state mm:000000001daacd99 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51542' (ECDSA) to the list of known hosts. 2023/06/21 06:27:27 fuzzer started 2023/06/21 06:27:27 dialing manager at localhost:36067 2023/06/21 06:27:27 checking machine... 2023/06/21 06:27:27 checking revisions... [ 42.052618] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:27:27 testing simple program... [ 42.089417] cgroup: Unknown subsys name 'net' [ 42.120739] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:27:27 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000d40 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffff888016a051ec RBP=ffff888016a051c0 RSP=ffff8880102f7890 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88800bfa4640 R13=0000000000000c40 R14=0000000000000000 R15=ffffffff81c619e4 RIP=ffffffff81787b3e 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 00007fd1030b9900 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=00007fd1024e74d0 CR3=0000000013a08000 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=64657669656365523d4547415353454d XMM01=332074726f7020322e322e302e303120 XMM02=63736964203a31313a38323435332074 XMM03=66207463656e6e6f6373696420646576 XMM04=80faeb859580c01e00000000000ae988 XMM05=1319e678c5640f8a00000000001330b0 XMM06=8fede82a5ad58cbe0000000000133018 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=ffff88806cf39f08 RCX=00000009a4f57a86 RDX=1ffff1100d9e73dc RSI=1ffffffff0ba7c92 RDI=ffff88806cf3a168 RBP=ffff888016577958 RSP=ffff888016577828 R8 =ffff888015cfd610 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88806cf39500 R13=ffff888015cfd1c0 R14=ffff88806cf39ee0 R15=ffff88800f4b8000 RIP=ffffffff8451e630 RFL=00000012 [----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 00007f866373c900 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=00007f86636e6008 CR3=000000000f044000 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