syzkaller login: [ 30.769654] BUG: Bad rss-counter state mm:00000000b6d588a2 type:MM_FILEPAGES val:33 [ 30.770866] BUG: Bad rss-counter state mm:00000000b6d588a2 type:MM_ANONPAGES val:22 [ 30.810417] ================================================================== [ 30.811327] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.812408] Read of size 8 at addr ffff888018b85310 by task sshd/220 [ 30.813287] [ 30.813512] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.814429] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.815434] Call Trace: [ 30.815759] [ 30.816059] dump_stack_lvl+0x91/0xf0 [ 30.816592] print_report+0xcc/0x620 [ 30.817106] ? __virt_addr_valid+0x102/0x340 [ 30.817683] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.818312] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.818947] kasan_report+0xbe/0xf0 [ 30.819452] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.820092] vma_interval_tree_remove+0xc75/0xec0 [ 30.820751] vma_prepare+0xc54/0x11a0 [ 30.821270] __split_vma+0x5af/0x950 [ 30.821752] ? __pfx___split_vma+0x10/0x10 [ 30.822292] ? find_held_lock+0x2c/0x110 [ 30.822824] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.823427] ? lock_is_held_type+0x9f/0x120 [ 30.824004] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.824649] ? mtree_range_walk+0x632/0x900 [ 30.825226] ? mas_walk+0x5c7/0x7c0 [ 30.825707] do_vmi_munmap+0x1f1/0x2b0 [ 30.826222] mmap_region+0x1f9/0x2660 [ 30.826735] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.827279] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.828024] ? __pfx_lock_acquire+0x10/0x10 [ 30.828617] ? __pfx_mmap_region+0x10/0x10 [ 30.829167] ? security_mmap_addr+0x7d/0xa0 [ 30.829733] ? get_unmapped_area+0x1f5/0x3f0 [ 30.830328] do_mmap+0x854/0xf00 [ 30.830794] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.831329] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.831924] ksys_mmap_pgoff+0x3af/0x500 [ 30.832478] do_syscall_64+0x3f/0x90 [ 30.832978] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.833680] RIP: 0033:0x7ff16d7e4d82 [ 30.834157] 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 [ 30.836355] RSP: 002b:00007ffc28af7468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.837272] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff16d7e4d82 [ 30.838145] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff16cc1e000 [ 30.839018] RBP: 00007ff16cc1e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.839923] R10: 0000000000000812 R11: 0000000000000206 R12: 000055959ab1dec0 [ 30.840829] R13: 00007ffc28af7480 R14: 00007ffc28af74b0 R15: 00007ffc28af7810 [ 30.841748] [ 30.842054] [ 30.842281] Allocated by task 213: [ 30.842742] kasan_save_stack+0x22/0x50 [ 30.843278] kasan_set_track+0x25/0x30 [ 30.843809] __kasan_slab_alloc+0x59/0x70 [ 30.844374] kmem_cache_alloc+0x16b/0x370 [ 30.844931] vm_area_dup+0x20/0x160 [ 30.845417] __split_vma+0x170/0x950 [ 30.845912] split_vma+0xc6/0x110 [ 30.846370] mprotect_fixup+0x8d2/0xb30 [ 30.846904] do_mprotect_pkey+0x87e/0xd40 [ 30.847446] __x64_sys_mprotect+0x78/0xc0 [ 30.848006] do_syscall_64+0x3f/0x90 [ 30.848523] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.849206] [ 30.849434] Freed by task 213: [ 30.849862] kasan_save_stack+0x22/0x50 [ 30.850393] kasan_set_track+0x25/0x30 [ 30.850906] kasan_save_free_info+0x2b/0x50 [ 30.851449] __kasan_slab_free+0x10a/0x190 [ 30.852005] kmem_cache_free+0x10d/0x4d0 [ 30.852559] rcu_core+0x8c8/0x2860 [ 30.853042] __do_softirq+0x1b7/0x7d4 [ 30.853543] [ 30.853769] Last potentially related work creation: [ 30.854395] kasan_save_stack+0x22/0x50 [ 30.854928] __kasan_record_aux_stack+0x8e/0xa0 [ 30.855539] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.856233] remove_vma+0x139/0x170 [ 30.856710] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.857306] do_vmi_munmap+0x1f1/0x2b0 [ 30.857820] __vm_munmap+0x138/0x3a0 [ 30.858327] __x64_sys_munmap+0x59/0x80 [ 30.858851] do_syscall_64+0x3f/0x90 [ 30.859354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.860029] [ 30.860275] The buggy address belongs to the object at ffff888018b852b8 [ 30.860275] which belongs to the cache vm_area_struct of size 168 [ 30.861807] The buggy address is located 88 bytes inside of [ 30.861807] freed 168-byte region [ffff888018b852b8, ffff888018b85360) [ 30.863303] [ 30.863528] The buggy address belongs to the physical page: [ 30.864253] page:00000000129960da refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18b85 [ 30.865423] memcg:ffff888018b75401 [ 30.865881] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.866566] page_type: 0xffffffff() [ 30.867024] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.867985] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018b75401 [ 30.868953] page dumped because: kasan: bad access detected [ 30.869665] [ 30.869880] Memory state around the buggy address: [ 30.870494] ffff888018b85200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.871364] ffff888018b85280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.872251] >ffff888018b85300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.873126] ^ [ 30.873615] ffff888018b85380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.874506] ffff888018b85400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.875399] ================================================================== [ 30.876642] Disabling lock debugging due to kernel taint [ 32.908629] BUG: Bad rss-counter state mm:0000000063470e80 type:MM_FILEPAGES val:33 [ 32.909661] BUG: Bad rss-counter state mm:0000000063470e80 type:MM_ANONPAGES val:22 [ 33.417064] BUG: Bad rss-counter state mm:00000000af2b1577 type:MM_FILEPAGES val:33 [ 33.418228] BUG: Bad rss-counter state mm:00000000af2b1577 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61867' (ECDSA) to the list of known hosts. 2023/06/21 01:48:14 fuzzer started 2023/06/21 01:48:15 dialing manager at localhost:36067 2023/06/21 01:48:15 checking machine... 2023/06/21 01:48:15 checking revisions... [ 34.098997] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:48:15 testing simple program... [ 34.144565] cgroup: Unknown subsys name 'net' [ 34.202832] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:48:14 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007ffcfe62a508 CR3=0000000005482000 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=00000000000000000000000000000000 XMM01=00007f437c7d75100000561f1ca20790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000038000 RBX=0000000000000001 RCX=ffffffff8180c6a1 RDX=dffffc0000000000 RSI=00000000000080c6 RDI=ffff888018977708 RBP=ffff888018977760 RSP=ffff888018977698 R8 =ffffffff860d825a R9 =ffff888018977748 R10=0000000000038001 R11=0000000000010b8d R12=ffff888018977768 R13=ffff888018977750 R14=ffff888018977749 R15=ffff888018977708 RIP=ffffffff81130754 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 00007f58884b3900 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=00007f5888a6a618 CR3=000000000cbc6000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000