syzkaller login: [ 35.447447] BUG: Bad rss-counter state mm:00000000a39f12e8 type:MM_FILEPAGES val:33 [ 35.448613] BUG: Bad rss-counter state mm:00000000a39f12e8 type:MM_ANONPAGES val:22 [ 35.622613] ================================================================== [ 35.623538] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.624492] Read of size 8 at addr ffff88800f1126b0 by task sshd/219 [ 35.625450] [ 35.625678] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.626548] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.627570] Call Trace: [ 35.627903] [ 35.628197] dump_stack_lvl+0x91/0xf0 [ 35.628705] print_report+0xcc/0x620 [ 35.629192] ? __virt_addr_valid+0x102/0x340 [ 35.629787] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.630427] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.631049] kasan_report+0xbe/0xf0 [ 35.631541] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.632167] vma_interval_tree_remove+0xc75/0xec0 [ 35.632774] vma_prepare+0xc54/0x11a0 [ 35.633262] __split_vma+0x5af/0x950 [ 35.633754] ? __pfx___split_vma+0x10/0x10 [ 35.634292] ? find_held_lock+0x2c/0x110 [ 35.634817] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.635389] ? lock_is_held_type+0x9f/0x120 [ 35.635936] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.636558] ? mtree_range_walk+0x632/0x900 [ 35.637121] ? mas_walk+0x5c7/0x7c0 [ 35.637607] do_vmi_munmap+0x1f1/0x2b0 [ 35.638110] mmap_region+0x1f9/0x2660 [ 35.638596] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.639116] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.639843] ? __pfx_lock_acquire+0x10/0x10 [ 35.640376] ? __pfx_mmap_region+0x10/0x10 [ 35.640914] ? security_mmap_addr+0x7d/0xa0 [ 35.641445] ? get_unmapped_area+0x1f5/0x3f0 [ 35.642017] do_mmap+0x854/0xf00 [ 35.642464] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.642964] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.643534] ksys_mmap_pgoff+0x3af/0x500 [ 35.644048] do_syscall_64+0x3f/0x90 [ 35.644539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.645196] RIP: 0033:0x7fdf3102dd82 [ 35.645658] 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 [ 35.647777] RSP: 002b:00007ffdd7f4c1e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.648695] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdf3102dd82 [ 35.649571] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdf30467000 [ 35.650443] RBP: 00007fdf30467000 R08: 0000000000000009 R09: 0000000000001000 [ 35.651309] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c78ec17ec0 [ 35.652161] R13: 00007ffdd7f4c200 R14: 00007ffdd7f4c230 R15: 00007ffdd7f4c590 [ 35.653026] [ 35.653320] [ 35.653540] Allocated by task 212: [ 35.653995] kasan_save_stack+0x22/0x50 [ 35.654505] kasan_set_track+0x25/0x30 [ 35.655001] __kasan_slab_alloc+0x59/0x70 [ 35.655532] kmem_cache_alloc+0x16b/0x370 [ 35.656055] vm_area_dup+0x20/0x160 [ 35.656515] __split_vma+0x170/0x950 [ 35.656984] split_vma+0xc6/0x110 [ 35.657426] mprotect_fixup+0x8d2/0xb30 [ 35.657942] do_mprotect_pkey+0x87e/0xd40 [ 35.658467] __x64_sys_mprotect+0x78/0xc0 [ 35.658998] do_syscall_64+0x3f/0x90 [ 35.659475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.660127] [ 35.660345] Freed by task 212: [ 35.660750] kasan_save_stack+0x22/0x50 [ 35.661265] kasan_set_track+0x25/0x30 [ 35.661776] kasan_save_free_info+0x2b/0x50 [ 35.662321] __kasan_slab_free+0x10a/0x190 [ 35.662864] kmem_cache_free+0x10d/0x4d0 [ 35.663385] rcu_core+0x8c8/0x2860 [ 35.663838] __do_softirq+0x1b7/0x7d4 [ 35.664320] [ 35.664538] Last potentially related work creation: [ 35.665134] kasan_save_stack+0x22/0x50 [ 35.665656] __kasan_record_aux_stack+0x8e/0xa0 [ 35.666236] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.666952] remove_vma+0x139/0x170 [ 35.667420] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.667984] do_vmi_munmap+0x1f1/0x2b0 [ 35.668472] __vm_munmap+0x138/0x3a0 [ 35.668948] __x64_sys_munmap+0x59/0x80 [ 35.669460] do_syscall_64+0x3f/0x90 [ 35.669953] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.670597] [ 35.670818] The buggy address belongs to the object at ffff88800f112658 [ 35.670818] which belongs to the cache vm_area_struct of size 168 [ 35.672298] The buggy address is located 88 bytes inside of [ 35.672298] freed 168-byte region [ffff88800f112658, ffff88800f112700) [ 35.673738] [ 35.673960] The buggy address belongs to the physical page: [ 35.674625] page:000000004a34924e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf112 [ 35.675730] memcg:ffff88801427a801 [ 35.676180] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.676853] page_type: 0xffffffff() [ 35.677310] raw: 0100000000000200 ffff88800879fc80 ffffea0000364200 dead000000000006 [ 35.678235] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801427a801 [ 35.679139] page dumped because: kasan: bad access detected [ 35.679805] [ 35.680021] Memory state around the buggy address: [ 35.680601] ffff88800f112580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.681456] ffff88800f112600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 35.682333] >ffff88800f112680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.683192] ^ [ 35.683785] ffff88800f112700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 35.684645] ffff88800f112780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.685501] ================================================================== [ 35.686509] Disabling lock debugging due to kernel taint [ 38.503415] BUG: Bad rss-counter state mm:00000000e6ec66f9 type:MM_FILEPAGES val:33 [ 38.504603] BUG: Bad rss-counter state mm:00000000e6ec66f9 type:MM_ANONPAGES val:22 [ 39.012713] BUG: Bad rss-counter state mm:0000000058d91ba0 type:MM_FILEPAGES val:33 [ 39.013904] BUG: Bad rss-counter state mm:0000000058d91ba0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29123' (ECDSA) to the list of known hosts. 2023/06/20 00:48:34 fuzzer started 2023/06/20 00:48:34 dialing manager at localhost:44161 2023/06/20 00:48:34 checking machine... 2023/06/20 00:48:34 checking revisions... [ 39.662503] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:48:34 testing simple program... [ 39.705234] cgroup: Unknown subsys name 'net' [ 39.758513] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:48:30 Registers: info registers vcpu 0 RAX=0000000000000005 RBX=0000000000000001 RCX=ffffffff8180995c RDX=0000000000000005 RSI=ffffffff86137004 RDI=ffffffff85dfc6a4 RBP=ffff888009517a30 RSP=ffff888009517930 R8 =ffffffff86137004 R9 =ffff888009517a18 R10=0000000000038001 R11=0000000000020cb4 R12=ffffffff85dfc6b4 R13=ffff888009517a20 R14=ffff888009517a19 R15=ffff8880095179d8 RIP=ffffffff8112fc21 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 00007f9ab7482900 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=00007f9ab69005b0 CR3=000000000d7b8000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=2ebb72b8a7cc85b700000000000ae988 XMM05=5937ab7c12393d0a00000000001358a0 XMM06=806171799158d9670000000000134690 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11001b9cf78 RSP=ffff88800dce7bb0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff81803ca1 R14=ffff88800dce7cd0 R15=ffffea000040c980 RIP=ffffffff812d86a2 RFL=00000247 [---Z-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 00007f10aa657900 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=00007fffc7e1f000 CR3=000000000ca2c000 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