syzkaller login: [ 32.009238] BUG: Bad rss-counter state mm:00000000ad75d56d type:MM_FILEPAGES val:33 [ 32.010686] BUG: Bad rss-counter state mm:00000000ad75d56d type:MM_ANONPAGES val:22 [ 32.155844] ================================================================== [ 32.156750] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.157686] Read of size 8 at addr ffff8880161c96b0 by task sshd/219 [ 32.158454] [ 32.158686] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.159663] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.160635] Call Trace: [ 32.160975] [ 32.161261] dump_stack_lvl+0x91/0xf0 [ 32.161757] print_report+0xcc/0x620 [ 32.162236] ? __virt_addr_valid+0x102/0x340 [ 32.162817] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.163436] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.164047] kasan_report+0xbe/0xf0 [ 32.164526] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.165142] vma_interval_tree_remove+0xc75/0xec0 [ 32.165750] vma_prepare+0xc54/0x11a0 [ 32.166240] __split_vma+0x5af/0x950 [ 32.166729] ? __pfx___split_vma+0x10/0x10 [ 32.167268] ? find_held_lock+0x2c/0x110 [ 32.167794] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.168359] ? lock_is_held_type+0x9f/0x120 [ 32.168892] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.169501] ? mtree_range_walk+0x632/0x900 [ 32.170043] ? mas_walk+0x5c7/0x7c0 [ 32.170514] do_vmi_munmap+0x1f1/0x2b0 [ 32.171019] mmap_region+0x1f9/0x2660 [ 32.171497] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.172007] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.172719] ? __pfx_lock_acquire+0x10/0x10 [ 32.173255] ? __pfx_mmap_region+0x10/0x10 [ 32.173783] ? security_mmap_addr+0x7d/0xa0 [ 32.174309] ? get_unmapped_area+0x1f5/0x3f0 [ 32.174865] do_mmap+0x854/0xf00 [ 32.175307] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.175801] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.176360] ksys_mmap_pgoff+0x3af/0x500 [ 32.176863] do_syscall_64+0x3f/0x90 [ 32.177336] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.177979] RIP: 0033:0x7fedfcaf9d82 [ 32.178434] 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 [ 32.180559] RSP: 002b:00007fff991c8c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.181462] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fedfcaf9d82 [ 32.182300] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fedfbf33000 [ 32.183153] RBP: 00007fedfbf33000 R08: 0000000000000009 R09: 0000000000001000 [ 32.183998] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ad62c4fec0 [ 32.184850] R13: 00007fff991c8c90 R14: 00007fff991c8cc0 R15: 00007fff991c9020 [ 32.185699] [ 32.185991] [ 32.186205] Allocated by task 212: [ 32.186648] kasan_save_stack+0x22/0x50 [ 32.187151] kasan_set_track+0x25/0x30 [ 32.187641] __kasan_slab_alloc+0x59/0x70 [ 32.188169] kmem_cache_alloc+0x16b/0x370 [ 32.188682] vm_area_dup+0x20/0x160 [ 32.189134] __split_vma+0x170/0x950 [ 32.189595] split_vma+0xc6/0x110 [ 32.190033] mprotect_fixup+0x8d2/0xb30 [ 32.190540] do_mprotect_pkey+0x87e/0xd40 [ 32.191073] __x64_sys_mprotect+0x78/0xc0 [ 32.191593] do_syscall_64+0x3f/0x90 [ 32.192069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.192702] [ 32.192918] Freed by task 212: [ 32.193305] kasan_save_stack+0x22/0x50 [ 32.193804] kasan_set_track+0x25/0x30 [ 32.194300] kasan_save_free_info+0x2b/0x50 [ 32.194859] __kasan_slab_free+0x10a/0x190 [ 32.195387] kmem_cache_free+0x10d/0x4d0 [ 32.195889] rcu_core+0x8c8/0x2860 [ 32.196329] __do_softirq+0x1b7/0x7d4 [ 32.196800] [ 32.197012] Last potentially related work creation: [ 32.197595] kasan_save_stack+0x22/0x50 [ 32.198098] __kasan_record_aux_stack+0x8e/0xa0 [ 32.198679] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.199326] remove_vma+0x139/0x170 [ 32.199772] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.200326] do_vmi_munmap+0x1f1/0x2b0 [ 32.200810] __vm_munmap+0x138/0x3a0 [ 32.201275] __x64_sys_munmap+0x59/0x80 [ 32.201764] do_syscall_64+0x3f/0x90 [ 32.202234] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.202888] [ 32.203102] The buggy address belongs to the object at ffff8880161c9658 [ 32.203102] which belongs to the cache vm_area_struct of size 168 [ 32.204564] The buggy address is located 88 bytes inside of [ 32.204564] freed 168-byte region [ffff8880161c9658, ffff8880161c9700) [ 32.205953] [ 32.206167] The buggy address belongs to the physical page: [ 32.206826] page:000000004aa4288f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x161c9 [ 32.207913] memcg:ffff88800c4f1e01 [ 32.208338] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.208980] page_type: 0xffffffff() [ 32.209428] raw: 0100000000000200 ffff88800879fc80 ffffea00003e0100 dead000000000008 [ 32.210351] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c4f1e01 [ 32.211273] page dumped because: kasan: bad access detected [ 32.211945] [ 32.212160] Memory state around the buggy address: [ 32.212744] ffff8880161c9580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.213598] ffff8880161c9600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.214455] >ffff8880161c9680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.215329] ^ [ 32.215917] ffff8880161c9700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 32.216777] ffff8880161c9780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 32.217627] ================================================================== [ 32.218609] Disabling lock debugging due to kernel taint [ 34.099907] BUG: Bad rss-counter state mm:0000000082d7abec type:MM_FILEPAGES val:33 [ 34.101102] BUG: Bad rss-counter state mm:0000000082d7abec type:MM_ANONPAGES val:22 [ 34.449202] BUG: Bad rss-counter state mm:00000000f9edb590 type:MM_FILEPAGES val:33 [ 34.450305] BUG: Bad rss-counter state mm:00000000f9edb590 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34731' (ECDSA) to the list of known hosts. 2023/06/20 05:54:45 fuzzer started 2023/06/20 05:54:45 dialing manager at localhost:44161 2023/06/20 05:54:45 checking machine... 2023/06/20 05:54:45 checking revisions... [ 35.184097] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:54:45 testing simple program... [ 35.229643] cgroup: Unknown subsys name 'net' [ 35.288271] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:54:45 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fd77b0e5bc0 CR3=000000001457a000 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=6f69cb2ef3f4059c0541653188323e99 XMM02=000000000011fcb8ec2efd57dc4c00df XMM03=00000000001243a0aaf67c2cd4349ade XMM04=e16762884c7a564700000000000ae988 XMM05=dfcdbad4f1609c370000000000133e90 XMM06=381c53ec9236a9f00000000000132cf8 XMM07=e042d86d42eb936e0000000000124620 XMM08=aaf67c2cd4349ade000000000011fd18 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=ffffffff8613da01 RDX=1ffff1100d9e134a RSI=ffffffff81847452 RDI=ffff88806cf09a50 RBP=ffff88806cf09ae8 RSP=ffff88806cf09a28 R8 =ffffffff8613daa0 R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000021e78 R12=ffff88806cf09b18 R13=0000000000000000 R14=ffff88800d623680 R15=ffff88806cf09a50 RIP=ffffffff811305f0 RFL=00000212 [----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 00007f6d29692900 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=00007ffcaa2ec000 CR3=000000000e1a2000 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