syzkaller login: [ 26.757253] BUG: Bad rss-counter state mm:00000000f8821335 type:MM_FILEPAGES val:33 [ 26.758020] BUG: Bad rss-counter state mm:00000000f8821335 type:MM_ANONPAGES val:22 [ 26.906265] ================================================================== [ 26.907402] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.908711] Read of size 8 at addr ffff88800e74b6b0 by task sshd/220 [ 26.909596] [ 26.909816] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.910747] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.911765] Call Trace: [ 26.912110] [ 26.912406] dump_stack_lvl+0x91/0xf0 [ 26.912910] print_report+0xcc/0x620 [ 26.913401] ? __virt_addr_valid+0x102/0x340 [ 26.914004] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.914651] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.915300] kasan_report+0xbe/0xf0 [ 26.915805] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.916652] vma_interval_tree_remove+0xc75/0xec0 [ 26.917478] vma_prepare+0xc54/0x11a0 [ 26.918127] __split_vma+0x5af/0x950 [ 26.918795] ? __pfx___split_vma+0x10/0x10 [ 26.919506] ? find_held_lock+0x2c/0x110 [ 26.920202] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.920953] ? lock_is_held_type+0x9f/0x120 [ 26.921618] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.922267] ? mtree_range_walk+0x632/0x900 [ 26.922839] ? mas_walk+0x5c7/0x7c0 [ 26.923335] do_vmi_munmap+0x1f1/0x2b0 [ 26.923843] mmap_region+0x1f9/0x2660 [ 26.924345] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.924862] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.925608] ? __pfx_lock_acquire+0x10/0x10 [ 26.926174] ? __pfx_mmap_region+0x10/0x10 [ 26.926724] ? security_mmap_addr+0x7d/0xa0 [ 26.927276] ? get_unmapped_area+0x1f5/0x3f0 [ 26.927834] do_mmap+0x854/0xf00 [ 26.928286] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.928801] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.929394] ksys_mmap_pgoff+0x3af/0x500 [ 26.929934] do_syscall_64+0x3f/0x90 [ 26.930467] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.931143] RIP: 0033:0x7f3169e4ad82 [ 26.931606] 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 [ 26.933787] RSP: 002b:00007ffdbbdd16f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.934737] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3169e4ad82 [ 26.935604] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3169284000 [ 26.936481] RBP: 00007f3169284000 R08: 0000000000000009 R09: 0000000000001000 [ 26.937345] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561a1c7a0b20 [ 26.938234] R13: 00007ffdbbdd1710 R14: 00007ffdbbdd1740 R15: 00007ffdbbdd1aa0 [ 26.939135] [ 26.939432] [ 26.939652] Allocated by task 213: [ 26.940104] kasan_save_stack+0x22/0x50 [ 26.940616] kasan_set_track+0x25/0x30 [ 26.941134] __kasan_slab_alloc+0x59/0x70 [ 26.941668] kmem_cache_alloc+0x16b/0x370 [ 26.942218] vm_area_dup+0x20/0x160 [ 26.942700] __split_vma+0x170/0x950 [ 26.943193] split_vma+0xc6/0x110 [ 26.943642] mprotect_fixup+0x8d2/0xb30 [ 26.944164] do_mprotect_pkey+0x87e/0xd40 [ 26.944694] __x64_sys_mprotect+0x78/0xc0 [ 26.945238] do_syscall_64+0x3f/0x90 [ 26.945721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.946408] [ 26.946630] Freed by task 213: [ 26.947052] kasan_save_stack+0x22/0x50 [ 26.947559] kasan_set_track+0x25/0x30 [ 26.948075] kasan_save_free_info+0x2b/0x50 [ 26.948610] __kasan_slab_free+0x10a/0x190 [ 26.949167] kmem_cache_free+0x10d/0x4d0 [ 26.949690] rcu_core+0x8c8/0x2860 [ 26.950314] __do_softirq+0x1b7/0x7d4 [ 26.950809] [ 26.951042] Last potentially related work creation: [ 26.951625] kasan_save_stack+0x22/0x50 [ 26.952167] __kasan_record_aux_stack+0x8e/0xa0 [ 26.952756] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.953423] remove_vma+0x139/0x170 [ 26.953897] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.954496] do_vmi_munmap+0x1f1/0x2b0 [ 26.955010] __vm_munmap+0x138/0x3a0 [ 26.955491] __x64_sys_munmap+0x59/0x80 [ 26.956012] do_syscall_64+0x3f/0x90 [ 26.956501] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.957162] [ 26.957390] The buggy address belongs to the object at ffff88800e74b658 [ 26.957390] which belongs to the cache vm_area_struct of size 168 [ 26.958946] The buggy address is located 88 bytes inside of [ 26.958946] freed 168-byte region [ffff88800e74b658, ffff88800e74b700) [ 26.960404] [ 26.960625] The buggy address belongs to the physical page: [ 26.961303] page:00000000dc8c1faa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe74b [ 26.962445] memcg:ffff88800d6e0901 [ 26.962880] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 26.963594] page_type: 0xffffffff() [ 26.964082] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 26.965027] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6e0901 [ 26.965966] page dumped because: kasan: bad access detected [ 26.966642] [ 26.966861] Memory state around the buggy address: [ 26.967461] ffff88800e74b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.968348] ffff88800e74b600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 26.969244] >ffff88800e74b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.970143] ^ [ 26.970788] ffff88800e74b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 26.971697] ffff88800e74b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 26.972563] ================================================================== [ 26.973640] Disabling lock debugging due to kernel taint [ 29.042899] BUG: Bad rss-counter state mm:0000000020627665 type:MM_FILEPAGES val:33 [ 29.044072] BUG: Bad rss-counter state mm:0000000020627665 type:MM_ANONPAGES val:22 [ 29.445541] BUG: Bad rss-counter state mm:00000000085e8593 type:MM_FILEPAGES val:33 [ 29.446659] BUG: Bad rss-counter state mm:00000000085e8593 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36959' (ECDSA) to the list of known hosts. 2023/06/20 05:57:46 fuzzer started 2023/06/20 05:57:46 dialing manager at localhost:44161 2023/06/20 05:57:46 checking machine... 2023/06/20 05:57:46 checking revisions... [ 30.216869] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:57:46 testing simple program... [ 30.268988] cgroup: Unknown subsys name 'net' [ 30.319327] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:57:43 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=0000000000000001 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=00007ffedd0ace08 CR3=0000000005482000 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=00007f0f110215100000556a8a2fd790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff818ad8c9 RDX=0000000000008ad8 RSI=0000000000008ad8 RDI=ffffffff8650a720 RBP=ffff8880143e74b8 RSP=ffff8880143e73f0 R8 =0000000000000000 R9 =ffff8880143e74a0 R10=0000000000038001 R11=0000000000023842 R12=ffff8880143e74c0 R13=ffff8880143e74a8 R14=ffff8880143e74a1 R15=ffff8880143e7460 RIP=ffffffff8113078b 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 00007f3eeb7b3900 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=00007fb8cac8d650 CR3=000000000f51e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=9092dd846a9aa6a700000000000ae988 XMM05=9aa6afb66d9965d90000000000134530 XMM06=4fda316b135da52b0000000000132fb0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000