syzkaller login: [ 30.705334] BUG: Bad rss-counter state mm:000000006207968d type:MM_FILEPAGES val:33 [ 30.706619] BUG: Bad rss-counter state mm:000000006207968d type:MM_ANONPAGES val:22 [ 30.871417] ================================================================== [ 30.872567] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.873773] Read of size 8 at addr ffff888015e76d08 by task sshd/220 [ 30.874827] [ 30.875045] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.875895] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.876873] Call Trace: [ 30.877194] [ 30.877482] dump_stack_lvl+0x91/0xf0 [ 30.877966] print_report+0xcc/0x620 [ 30.878460] ? __virt_addr_valid+0x102/0x340 [ 30.879004] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.879619] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.880226] kasan_report+0xbe/0xf0 [ 30.880705] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.881319] vma_interval_tree_remove+0xc75/0xec0 [ 30.881984] vma_prepare+0xc54/0x11a0 [ 30.882520] __split_vma+0x5af/0x950 [ 30.883030] ? __pfx___split_vma+0x10/0x10 [ 30.883610] ? find_held_lock+0x2c/0x110 [ 30.884174] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.884784] ? lock_is_held_type+0x9f/0x120 [ 30.885377] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.886033] ? mtree_range_walk+0x632/0x900 [ 30.886620] ? mas_walk+0x5c7/0x7c0 [ 30.887118] do_vmi_munmap+0x1f1/0x2b0 [ 30.887645] mmap_region+0x1f9/0x2660 [ 30.888170] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.888723] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.889499] ? __pfx_lock_acquire+0x10/0x10 [ 30.890081] ? __pfx_mmap_region+0x10/0x10 [ 30.890667] ? security_mmap_addr+0x7d/0xa0 [ 30.891239] ? get_unmapped_area+0x1f5/0x3f0 [ 30.891842] do_mmap+0x854/0xf00 [ 30.892313] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.892857] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.893463] ksys_mmap_pgoff+0x3af/0x500 [ 30.894014] do_syscall_64+0x3f/0x90 [ 30.894545] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.895241] RIP: 0033:0x7fce00c58d82 [ 30.895733] 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 [ 30.898029] RSP: 002b:00007ffe9fd70128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.899003] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fce00c58d82 [ 30.899917] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fce00092000 [ 30.900829] RBP: 00007fce00092000 R08: 0000000000000009 R09: 0000000000001000 [ 30.901745] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c346ab9ec0 [ 30.902689] R13: 00007ffe9fd70140 R14: 00007ffe9fd70170 R15: 00007ffe9fd704d0 [ 30.903607] [ 30.903921] [ 30.904149] Allocated by task 213: [ 30.904612] kasan_save_stack+0x22/0x50 [ 30.905148] kasan_set_track+0x25/0x30 [ 30.905683] __kasan_slab_alloc+0x59/0x70 [ 30.906271] kmem_cache_alloc+0x16b/0x370 [ 30.906818] vm_area_dup+0x20/0x160 [ 30.907306] __split_vma+0x170/0x950 [ 30.907810] split_vma+0xc6/0x110 [ 30.908281] mprotect_fixup+0x8d2/0xb30 [ 30.908830] do_mprotect_pkey+0x87e/0xd40 [ 30.909389] __x64_sys_mprotect+0x78/0xc0 [ 30.909948] do_syscall_64+0x3f/0x90 [ 30.910468] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.911167] [ 30.911401] Freed by task 203: [ 30.911839] kasan_save_stack+0x22/0x50 [ 30.912379] kasan_set_track+0x25/0x30 [ 30.912911] kasan_save_free_info+0x2b/0x50 [ 30.913483] __kasan_slab_free+0x10a/0x190 [ 30.914055] kmem_cache_free+0x10d/0x4d0 [ 30.914628] rcu_core+0x8c8/0x2860 [ 30.915175] __do_softirq+0x1b7/0x7d4 [ 30.915695] [ 30.915929] Last potentially related work creation: [ 30.916569] kasan_save_stack+0x22/0x50 [ 30.917100] __kasan_record_aux_stack+0x8e/0xa0 [ 30.917715] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.918417] remove_vma+0x139/0x170 [ 30.918903] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.919506] do_vmi_munmap+0x1f1/0x2b0 [ 30.920035] __vm_munmap+0x138/0x3a0 [ 30.920545] __x64_sys_munmap+0x59/0x80 [ 30.921080] do_syscall_64+0x3f/0x90 [ 30.921578] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.922289] [ 30.922525] The buggy address belongs to the object at ffff888015e76cb0 [ 30.922525] which belongs to the cache vm_area_struct of size 168 [ 30.924120] The buggy address is located 88 bytes inside of [ 30.924120] freed 168-byte region [ffff888015e76cb0, ffff888015e76d58) [ 30.925629] [ 30.925866] The buggy address belongs to the physical page: [ 30.926591] page:00000000d03b96e2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15e76 [ 30.927774] memcg:ffff88800f055001 [ 30.928233] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.928937] page_type: 0xffffffff() [ 30.929428] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.930431] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f055001 [ 30.931419] page dumped because: kasan: bad access detected [ 30.932129] [ 30.932362] Memory state around the buggy address: [ 30.932994] ffff888015e76c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.933916] ffff888015e76c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.934834] >ffff888015e76d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.935750] ^ [ 30.936228] ffff888015e76d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.937151] ffff888015e76e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.938084] ================================================================== [ 30.939105] Disabling lock debugging due to kernel taint [ 33.618675] BUG: Bad rss-counter state mm:00000000dfafd94b type:MM_FILEPAGES val:33 [ 33.619733] BUG: Bad rss-counter state mm:00000000dfafd94b type:MM_ANONPAGES val:22 [ 34.103432] BUG: Bad rss-counter state mm:000000001aaa3a8a type:MM_FILEPAGES val:33 [ 34.104634] BUG: Bad rss-counter state mm:000000001aaa3a8a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18010' (ECDSA) to the list of known hosts. 2023/06/20 05:45:15 fuzzer started 2023/06/20 05:45:16 dialing manager at localhost:44161 2023/06/20 05:45:16 checking machine... 2023/06/20 05:45:16 checking revisions... [ 34.644806] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:45:16 testing simple program... [ 34.688286] cgroup: Unknown subsys name 'net' [ 34.757126] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:45:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce2c240 RCX=0000000000000000 RDX=1ffffffff0a81e40 RSI=ffffffff813fc0cb RDI=0000000000000001 RBP=00000007e3866677 RSP=ffff88801455fd20 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000016f6315eb8 R12=00000000fffbef53 R13=00000000fffbef52 R14=ffffffff8540f200 R15=ffff88806ce2c248 RIP=ffffffff813fc117 RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3941947900 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=00007f3940dc2ee8 CR3=000000000d860000 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=adfaaa3eba9d248f96472cc3a82d5807 XMM02=000000000011cdf0d59e07bde36eea69 XMM03=000000000011cf18ec2efd57dc4c00df XMM04=a09d2d02d0b9fed100000000000ae988 XMM05=e45c3a81cf091d360000000000135070 XMM06=4fda316b135da52b0000000000133e60 XMM07=fb795ef6d65770560000000000124490 XMM08=2c67c8bc2e329bc3000000000011cf18 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000006097 RBX=0000000000000001 RCX=ffffffff81132ffd RDX=0000000000006098 RSI=000000000000132f RDI=ffffffff8609675c RBP=ffff888008e579d0 RSP=ffff888008e578b8 R8 =ffffffff86096756 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff888008e579d8 R13=ffff888008e579c0 R14=ffff888008e579b9 R15=ffff888008e57978 RIP=ffffffff81130861 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 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=00007fff723c5000 CR3=000000000ea68000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000