syzkaller login: [ 31.019508] BUG: Bad rss-counter state mm:0000000049708c60 type:MM_FILEPAGES val:33 [ 31.021369] BUG: Bad rss-counter state mm:0000000049708c60 type:MM_ANONPAGES val:22 [ 31.188787] ================================================================== [ 31.189711] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.190656] Read of size 8 at addr ffff88800fd6b310 by task sshd/222 [ 31.191423] [ 31.191645] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.192637] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.193626] Call Trace: [ 31.193971] [ 31.194257] dump_stack_lvl+0x91/0xf0 [ 31.194762] print_report+0xcc/0x620 [ 31.195247] ? __virt_addr_valid+0x102/0x340 [ 31.195823] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.196458] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.197072] kasan_report+0xbe/0xf0 [ 31.197561] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.198184] vma_interval_tree_remove+0xc75/0xec0 [ 31.198810] vma_prepare+0xc54/0x11a0 [ 31.199296] __split_vma+0x5af/0x950 [ 31.199793] ? __pfx___split_vma+0x10/0x10 [ 31.200359] ? find_held_lock+0x2c/0x110 [ 31.200895] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.201460] ? lock_is_held_type+0x9f/0x120 [ 31.202020] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.202647] ? mtree_range_walk+0x632/0x900 [ 31.203226] ? mas_walk+0x5c7/0x7c0 [ 31.203753] do_vmi_munmap+0x1f1/0x2b0 [ 31.204293] mmap_region+0x1f9/0x2660 [ 31.204800] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.205316] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.206043] ? __pfx_lock_acquire+0x10/0x10 [ 31.206580] ? __pfx_mmap_region+0x10/0x10 [ 31.207111] ? security_mmap_addr+0x7d/0xa0 [ 31.207644] ? get_unmapped_area+0x1f5/0x3f0 [ 31.208221] do_mmap+0x854/0xf00 [ 31.208668] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.209185] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.209767] ksys_mmap_pgoff+0x3af/0x500 [ 31.210301] do_syscall_64+0x3f/0x90 [ 31.210794] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.211464] RIP: 0033:0x7f77cc039d82 [ 31.211969] 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 [ 31.214189] RSP: 002b:00007ffc17e94538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.215152] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f77cc039d82 [ 31.216026] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f77cb473000 [ 31.216910] RBP: 00007f77cb473000 R08: 0000000000000009 R09: 0000000000001000 [ 31.217811] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cb19e53b20 [ 31.218711] R13: 00007ffc17e94550 R14: 00007ffc17e94580 R15: 00007ffc17e948e0 [ 31.219596] [ 31.219896] [ 31.220111] Allocated by task 215: [ 31.220552] kasan_save_stack+0x22/0x50 [ 31.221072] kasan_set_track+0x25/0x30 [ 31.221580] __kasan_slab_alloc+0x59/0x70 [ 31.222118] kmem_cache_alloc+0x16b/0x370 [ 31.222637] vm_area_dup+0x20/0x160 [ 31.223098] __split_vma+0x170/0x950 [ 31.223585] split_vma+0xc6/0x110 [ 31.224037] mprotect_fixup+0x8d2/0xb30 [ 31.224539] do_mprotect_pkey+0x87e/0xd40 [ 31.225065] __x64_sys_mprotect+0x78/0xc0 [ 31.225596] do_syscall_64+0x3f/0x90 [ 31.226075] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.226734] [ 31.226950] Freed by task 215: [ 31.227343] kasan_save_stack+0x22/0x50 [ 31.227859] kasan_set_track+0x25/0x30 [ 31.228360] kasan_save_free_info+0x2b/0x50 [ 31.228898] __kasan_slab_free+0x10a/0x190 [ 31.229430] kmem_cache_free+0x10d/0x4d0 [ 31.229944] rcu_core+0x8c8/0x2860 [ 31.230394] __do_softirq+0x1b7/0x7d4 [ 31.230872] [ 31.231091] Last potentially related work creation: [ 31.231700] kasan_save_stack+0x22/0x50 [ 31.232216] __kasan_record_aux_stack+0x8e/0xa0 [ 31.232792] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.233441] remove_vma+0x139/0x170 [ 31.233899] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.234466] do_vmi_munmap+0x1f1/0x2b0 [ 31.234950] __vm_munmap+0x138/0x3a0 [ 31.235423] __x64_sys_munmap+0x59/0x80 [ 31.235941] do_syscall_64+0x3f/0x90 [ 31.236424] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.237078] [ 31.237291] The buggy address belongs to the object at ffff88800fd6b2b8 [ 31.237291] which belongs to the cache vm_area_struct of size 168 [ 31.238770] The buggy address is located 88 bytes inside of [ 31.238770] freed 168-byte region [ffff88800fd6b2b8, ffff88800fd6b360) [ 31.240193] [ 31.240408] The buggy address belongs to the physical page: [ 31.241085] page:0000000043cb03ff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd6b [ 31.242184] memcg:ffff88800f660601 [ 31.242627] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.243277] page_type: 0xffffffff() [ 31.243758] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.244688] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f660601 [ 31.245610] page dumped because: kasan: bad access detected [ 31.246290] [ 31.246512] Memory state around the buggy address: [ 31.247100] ffff88800fd6b200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.247967] ffff88800fd6b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.248836] >ffff88800fd6b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.249707] ^ [ 31.250163] ffff88800fd6b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.251010] ffff88800fd6b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.251869] ================================================================== [ 31.252825] Disabling lock debugging due to kernel taint [ 33.221393] BUG: Bad rss-counter state mm:000000003fe5f8e2 type:MM_FILEPAGES val:33 [ 33.222935] BUG: Bad rss-counter state mm:000000003fe5f8e2 type:MM_ANONPAGES val:22 [ 33.740002] BUG: Bad rss-counter state mm:0000000001a8e559 type:MM_FILEPAGES val:33 [ 33.741577] BUG: Bad rss-counter state mm:0000000001a8e559 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36433' (ECDSA) to the list of known hosts. 2023/06/21 07:40:03 fuzzer started 2023/06/21 07:40:04 dialing manager at localhost:36067 2023/06/21 07:40:04 checking machine... 2023/06/21 07:40:04 checking revisions... [ 34.502927] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:40:04 testing simple program... [ 34.557217] cgroup: Unknown subsys name 'net' [ 34.605795] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:40:03 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=ffff88800ef5d1c0 RSI=ffffffff83ab1b24 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800fe4f500 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000099900000999 R12=0000000000000000 R13=00000000000000c1 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff814c0871 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 00007f3f4a47d900 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=00007fff571a3000 CR3=00000000169de000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fb13c35b5e0 CR3=000000000eaa4000 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=2033303a30343a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a30343a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000