syzkaller login: [ 60.258611] BUG: Bad rss-counter state mm:000000008533f6dd type:MM_FILEPAGES val:33 [ 60.259842] BUG: Bad rss-counter state mm:000000008533f6dd type:MM_ANONPAGES val:22 [ 60.405884] ================================================================== [ 60.406850] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.407875] Read of size 8 at addr ffff88800d79c6b0 by task sshd/221 [ 60.408598] [ 60.408948] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.409765] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.410708] Call Trace: [ 60.411026] [ 60.411296] dump_stack_lvl+0x91/0xf0 [ 60.411763] print_report+0xcc/0x620 [ 60.412229] ? __virt_addr_valid+0x102/0x340 [ 60.412752] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.413332] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.413909] kasan_report+0xbe/0xf0 [ 60.414357] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.414957] vma_interval_tree_remove+0xc75/0xec0 [ 60.415551] vma_prepare+0xc54/0x11a0 [ 60.416023] __split_vma+0x5af/0x950 [ 60.416494] ? __pfx___split_vma+0x10/0x10 [ 60.417017] ? find_held_lock+0x2c/0x110 [ 60.417536] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.418101] ? lock_is_held_type+0x9f/0x120 [ 60.418664] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.419262] ? mtree_range_walk+0x632/0x900 [ 60.419814] ? mas_walk+0x5c7/0x7c0 [ 60.420295] do_vmi_munmap+0x1f1/0x2b0 [ 60.420778] mmap_region+0x1f9/0x2660 [ 60.421269] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.421781] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.422494] ? __pfx_lock_acquire+0x10/0x10 [ 60.423036] ? __pfx_mmap_region+0x10/0x10 [ 60.423553] ? security_mmap_addr+0x7d/0xa0 [ 60.424078] ? get_unmapped_area+0x1f5/0x3f0 [ 60.424628] do_mmap+0x854/0xf00 [ 60.425061] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.425552] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.426108] ksys_mmap_pgoff+0x3af/0x500 [ 60.426618] do_syscall_64+0x3f/0x90 [ 60.427095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.427751] RIP: 0033:0x7f8e36edad82 [ 60.428207] 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 [ 60.430321] RSP: 002b:00007ffde0150b58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.431244] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8e36edad82 [ 60.432091] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8e36314000 [ 60.432929] RBP: 00007f8e36314000 R08: 0000000000000009 R09: 0000000000001000 [ 60.433770] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cddc423ec0 [ 60.434612] R13: 00007ffde0150b70 R14: 00007ffde0150ba0 R15: 00007ffde0150f00 [ 60.435463] [ 60.435746] [ 60.435958] Allocated by task 214: [ 60.436390] kasan_save_stack+0x22/0x50 [ 60.436891] kasan_set_track+0x25/0x30 [ 60.437388] __kasan_slab_alloc+0x59/0x70 [ 60.437906] kmem_cache_alloc+0x16b/0x370 [ 60.438416] vm_area_dup+0x20/0x160 [ 60.438883] __split_vma+0x170/0x950 [ 60.439350] split_vma+0xc6/0x110 [ 60.439791] mprotect_fixup+0x8d2/0xb30 [ 60.440283] do_mprotect_pkey+0x87e/0xd40 [ 60.440804] __x64_sys_mprotect+0x78/0xc0 [ 60.441322] do_syscall_64+0x3f/0x90 [ 60.441796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.442432] [ 60.442666] Freed by task 203: [ 60.443046] kasan_save_stack+0x22/0x50 [ 60.443546] kasan_set_track+0x25/0x30 [ 60.444029] kasan_save_free_info+0x2b/0x50 [ 60.444557] __kasan_slab_free+0x10a/0x190 [ 60.445080] kmem_cache_free+0x10d/0x4d0 [ 60.445585] rcu_core+0x8c8/0x2860 [ 60.446025] __do_softirq+0x1b7/0x7d4 [ 60.446504] [ 60.446726] Last potentially related work creation: [ 60.447310] kasan_save_stack+0x22/0x50 [ 60.447805] __kasan_record_aux_stack+0x8e/0xa0 [ 60.448370] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.449003] remove_vma+0x139/0x170 [ 60.449449] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.450011] do_vmi_munmap+0x1f1/0x2b0 [ 60.450489] __vm_munmap+0x138/0x3a0 [ 60.450992] __x64_sys_munmap+0x59/0x80 [ 60.451574] do_syscall_64+0x3f/0x90 [ 60.452139] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.452913] [ 60.453159] Second to last potentially related work creation: [ 60.453844] kasan_save_stack+0x22/0x50 [ 60.454332] __kasan_record_aux_stack+0x8e/0xa0 [ 60.454907] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.455532] remove_vma+0x139/0x170 [ 60.455973] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.456518] do_vmi_munmap+0x1f1/0x2b0 [ 60.456995] mmap_region+0x1f9/0x2660 [ 60.457457] do_mmap+0x854/0xf00 [ 60.457879] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.458354] ksys_mmap_pgoff+0x3af/0x500 [ 60.458847] do_syscall_64+0x3f/0x90 [ 60.459312] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.459939] [ 60.460148] The buggy address belongs to the object at ffff88800d79c658 [ 60.460148] which belongs to the cache vm_area_struct of size 168 [ 60.461589] The buggy address is located 88 bytes inside of [ 60.461589] freed 168-byte region [ffff88800d79c658, ffff88800d79c700) [ 60.462958] [ 60.463166] The buggy address belongs to the physical page: [ 60.463802] page:00000000d07867ff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd79c [ 60.464846] memcg:ffff88800de54f01 [ 60.465262] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.465883] page_type: 0xffffffff() [ 60.466320] raw: 0100000000000200 ffff8880087a0c80 ffffea00003aa000 dead000000000006 [ 60.467228] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de54f01 [ 60.468100] page dumped because: kasan: bad access detected [ 60.468742] [ 60.468952] Memory state around the buggy address: [ 60.469515] ffff88800d79c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.470341] ffff88800d79c600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 60.471178] >ffff88800d79c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.472000] ^ [ 60.472567] ffff88800d79c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 60.473397] ffff88800d79c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 60.474215] ================================================================== [ 60.475373] Disabling lock debugging due to kernel taint [ 63.241850] BUG: Bad rss-counter state mm:0000000046774463 type:MM_FILEPAGES val:33 [ 63.242997] BUG: Bad rss-counter state mm:0000000046774463 type:MM_ANONPAGES val:22 [ 63.718775] BUG: Bad rss-counter state mm:000000007fcde6cb type:MM_FILEPAGES val:33 [ 63.719908] BUG: Bad rss-counter state mm:000000007fcde6cb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59810' (ECDSA) to the list of known hosts. 2023/06/20 18:58:39 fuzzer started 2023/06/20 18:58:39 dialing manager at localhost:36067 2023/06/20 18:58:39 checking machine... 2023/06/20 18:58:39 checking revisions... [ 64.502709] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:58:39 testing simple program... [ 64.556624] cgroup: Unknown subsys name 'net' [ 64.611663] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:58:39 Registers: info registers vcpu 0 RAX=0000000080000101 RBX=ffffffff86607dd4 RCX=0000000080000101 RDX=1ffff1100d9c135e RSI=ffffffff81007b50 RDI=ffffffff86607dd4 RBP=ffffffff86607dd4 RSP=ffff88806ce09a18 R8 =ffffffff864bd7f0 R9 =ffff88806ce09ad8 R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff8880102ee1b0 RIP=ffffffff814c0871 RFL=00000206 [-----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 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=00007ffee6eb0728 CR3=0000000019fcc000 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=2038333a38353a3831203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a38353a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c857a RDI=ffff888015ed3a74 RBP=ffff888015ed3680 RSP=ffff888015c9f888 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff888015ed3680 R13=0000000000000000 R14=ffffffff85652c08 R15=0000000000000cc0 RIP=ffffffff8137453a 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 00007fdd7c3e0900 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=00007fdd7c997618 CR3=000000001a190000 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