syzkaller login: [ 28.736481] BUG: Bad rss-counter state mm:0000000078542adf type:MM_FILEPAGES val:33 [ 28.737738] BUG: Bad rss-counter state mm:0000000078542adf type:MM_ANONPAGES val:22 [ 28.883269] ================================================================== [ 28.884146] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.885074] Read of size 8 at addr ffff88800ee2b6b0 by task sshd/220 [ 28.885830] [ 28.886044] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.886984] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.887938] Call Trace: [ 28.888250] [ 28.888525] dump_stack_lvl+0x91/0xf0 [ 28.889020] print_report+0xcc/0x620 [ 28.889494] ? __virt_addr_valid+0x102/0x340 [ 28.890026] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.890630] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.891233] kasan_report+0xbe/0xf0 [ 28.891693] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.892300] vma_interval_tree_remove+0xc75/0xec0 [ 28.892896] vma_prepare+0xc54/0x11a0 [ 28.893371] __split_vma+0x5af/0x950 [ 28.893830] ? __pfx___split_vma+0x10/0x10 [ 28.894347] ? find_held_lock+0x2c/0x110 [ 28.894859] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.895415] ? lock_is_held_type+0x9f/0x120 [ 28.895940] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.896533] ? mtree_range_walk+0x632/0x900 [ 28.897082] ? mas_walk+0x5c7/0x7c0 [ 28.897546] do_vmi_munmap+0x1f1/0x2b0 [ 28.898028] mmap_region+0x1f9/0x2660 [ 28.898505] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.899003] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.899704] ? __pfx_lock_acquire+0x10/0x10 [ 28.900228] ? __pfx_mmap_region+0x10/0x10 [ 28.900748] ? security_mmap_addr+0x7d/0xa0 [ 28.901282] ? get_unmapped_area+0x1f5/0x3f0 [ 28.901826] do_mmap+0x854/0xf00 [ 28.902257] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.902744] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.903293] ksys_mmap_pgoff+0x3af/0x500 [ 28.903794] do_syscall_64+0x3f/0x90 [ 28.904266] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.904903] RIP: 0033:0x7ff3ccb8ed82 [ 28.905360] 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 [ 28.907448] RSP: 002b:00007ffc6086ee98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.908337] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff3ccb8ed82 [ 28.909186] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff3cbfc8000 [ 28.910016] RBP: 00007ff3cbfc8000 R08: 0000000000000009 R09: 0000000000001000 [ 28.910847] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561fa9db0ec0 [ 28.911677] R13: 00007ffc6086eeb0 R14: 00007ffc6086eee0 R15: 00007ffc6086f240 [ 28.912516] [ 28.912805] [ 28.913023] Allocated by task 213: [ 28.913446] kasan_save_stack+0x22/0x50 [ 28.913944] kasan_set_track+0x25/0x30 [ 28.914433] __kasan_slab_alloc+0x59/0x70 [ 28.914945] kmem_cache_alloc+0x16b/0x370 [ 28.915453] vm_area_dup+0x20/0x160 [ 28.915897] __split_vma+0x170/0x950 [ 28.916359] split_vma+0xc6/0x110 [ 28.916794] mprotect_fixup+0x8d2/0xb30 [ 28.917309] do_mprotect_pkey+0x87e/0xd40 [ 28.917822] __x64_sys_mprotect+0x78/0xc0 [ 28.918333] do_syscall_64+0x3f/0x90 [ 28.918803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.919434] [ 28.919646] Freed by task 213: [ 28.920031] kasan_save_stack+0x22/0x50 [ 28.920524] kasan_set_track+0x25/0x30 [ 28.921017] kasan_save_free_info+0x2b/0x50 [ 28.921544] __kasan_slab_free+0x10a/0x190 [ 28.922067] kmem_cache_free+0x10d/0x4d0 [ 28.922566] rcu_core+0x8c8/0x2860 [ 28.923004] __do_softirq+0x1b7/0x7d4 [ 28.923471] [ 28.923683] Last potentially related work creation: [ 28.924259] kasan_save_stack+0x22/0x50 [ 28.924757] __kasan_record_aux_stack+0x8e/0xa0 [ 28.925326] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.925962] remove_vma+0x139/0x170 [ 28.926405] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.926962] do_vmi_munmap+0x1f1/0x2b0 [ 28.927442] __vm_munmap+0x138/0x3a0 [ 28.927903] __x64_sys_munmap+0x59/0x80 [ 28.928391] do_syscall_64+0x3f/0x90 [ 28.928859] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.929515] [ 28.929729] The buggy address belongs to the object at ffff88800ee2b658 [ 28.929729] which belongs to the cache vm_area_struct of size 168 [ 28.931180] The buggy address is located 88 bytes inside of [ 28.931180] freed 168-byte region [ffff88800ee2b658, ffff88800ee2b700) [ 28.932566] [ 28.932778] The buggy address belongs to the physical page: [ 28.933432] page:00000000e358f3e5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee2b [ 28.934499] memcg:ffff88801447be01 [ 28.934917] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.935552] page_type: 0xffffffff() [ 28.935996] raw: 0100000000000200 ffff88800879fc80 ffffea00005af3c0 dead000000000006 [ 28.936916] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801447be01 [ 28.937810] page dumped because: kasan: bad access detected [ 28.938458] [ 28.938669] Memory state around the buggy address: [ 28.939240] ffff88800ee2b580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.940082] ffff88800ee2b600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 28.940934] >ffff88800ee2b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.941784] ^ [ 28.942356] ffff88800ee2b700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 28.943201] ffff88800ee2b780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 28.944041] ================================================================== [ 28.945057] Disabling lock debugging due to kernel taint [ 30.847965] BUG: Bad rss-counter state mm:00000000e84e2e76 type:MM_FILEPAGES val:33 [ 30.849169] BUG: Bad rss-counter state mm:00000000e84e2e76 type:MM_ANONPAGES val:22 [ 31.181804] BUG: Bad rss-counter state mm:00000000a5079e0b type:MM_FILEPAGES val:33 [ 31.183115] BUG: Bad rss-counter state mm:00000000a5079e0b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59469' (ECDSA) to the list of known hosts. 2023/06/20 02:14:04 fuzzer started 2023/06/20 02:14:04 dialing manager at localhost:44161 2023/06/20 02:14:04 checking machine... 2023/06/20 02:14:04 checking revisions... [ 31.912087] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:14:05 testing simple program... [ 31.955542] cgroup: Unknown subsys name 'net' [ 31.995634] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:14:04 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000001 RSI=00000000000000fb RDI=0000000000000001 RBP=ffff8880147c76a8 RSP=ffff8880147c75e0 R8 =0000000000000001 R9 =ffffed10028f8ec8 R10=ffff8880147c7647 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff8112993a RFL=00000002 [-------] 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 00007fc869ecd900 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=00007fc86a482650 CR3=0000000009fc8000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fae53345830 CR3=0000000008dac000 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=c1b67beeec36058aa64f0ce552a78df8 XMM02=2c67c8bc2e329bc3000000000011ffb0 XMM03=fb795ef6d65770560000000000123ef0 XMM04=eda1fb7fed35817f00000000000ae988 XMM05=e4cb8bb95a7664b60000000000134170 XMM06=c291bd5c70af25b90000000000133ff8 XMM07=e042d86d42eb936e00000000001241c8 XMM08=bab27c1f1e79b6190000000000120010 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000