syzkaller login: [ 90.413713] BUG: Bad rss-counter state mm:000000004297d0e7 type:MM_FILEPAGES val:33 [ 90.415357] BUG: Bad rss-counter state mm:000000004297d0e7 type:MM_ANONPAGES val:22 [ 90.585445] ================================================================== [ 90.586493] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 90.587441] Read of size 8 at addr ffff88800e758ed8 by task sshd/220 [ 90.588330] [ 90.588556] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 90.589606] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 90.590609] Call Trace: [ 90.590930] [ 90.591215] dump_stack_lvl+0x91/0xf0 [ 90.591704] print_report+0xcc/0x620 [ 90.592188] ? __virt_addr_valid+0x102/0x340 [ 90.592747] ? vma_interval_tree_remove+0xc75/0xec0 [ 90.593374] ? vma_interval_tree_remove+0xc75/0xec0 [ 90.594008] kasan_report+0xbe/0xf0 [ 90.594478] ? vma_interval_tree_remove+0xc75/0xec0 [ 90.595102] vma_interval_tree_remove+0xc75/0xec0 [ 90.595705] vma_prepare+0xc54/0x11a0 [ 90.596186] __split_vma+0x5af/0x950 [ 90.596659] ? __pfx___split_vma+0x10/0x10 [ 90.597194] ? find_held_lock+0x2c/0x110 [ 90.597738] do_vmi_align_munmap+0x2ba/0x11f0 [ 90.598305] ? lock_is_held_type+0x9f/0x120 [ 90.598851] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 90.599455] ? mtree_range_walk+0x632/0x900 [ 90.600004] ? mas_walk+0x5c7/0x7c0 [ 90.600478] do_vmi_munmap+0x1f1/0x2b0 [ 90.600973] mmap_region+0x1f9/0x2660 [ 90.601458] ? vm_mmap_pgoff+0x15c/0x3a0 [ 90.601985] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 90.602708] ? __pfx_lock_acquire+0x10/0x10 [ 90.603267] ? __pfx_mmap_region+0x10/0x10 [ 90.603821] ? security_mmap_addr+0x7d/0xa0 [ 90.604388] ? get_unmapped_area+0x1f5/0x3f0 [ 90.604937] do_mmap+0x854/0xf00 [ 90.605381] vm_mmap_pgoff+0x1a6/0x3a0 [ 90.605890] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 90.606458] ksys_mmap_pgoff+0x3af/0x500 [ 90.606970] do_syscall_64+0x3f/0x90 [ 90.607452] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 90.608095] RIP: 0033:0x7fa4648dfd82 [ 90.608557] 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 [ 90.610708] RSP: 002b:00007fff7ca1b068 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 90.611620] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa4648dfd82 [ 90.612475] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa463d19000 [ 90.613333] RBP: 00007fa463d19000 R08: 0000000000000009 R09: 0000000000001000 [ 90.614181] R10: 0000000000000812 R11: 0000000000000206 R12: 000055910a173b20 [ 90.615039] R13: 00007fff7ca1b080 R14: 00007fff7ca1b0b0 R15: 00007fff7ca1b410 [ 90.615910] [ 90.616202] [ 90.616424] Allocated by task 213: [ 90.616860] kasan_save_stack+0x22/0x50 [ 90.617371] kasan_set_track+0x25/0x30 [ 90.617872] __kasan_slab_alloc+0x59/0x70 [ 90.618401] kmem_cache_alloc+0x16b/0x370 [ 90.618930] vm_area_dup+0x20/0x160 [ 90.619397] __split_vma+0x170/0x950 [ 90.619870] split_vma+0xc6/0x110 [ 90.620313] mprotect_fixup+0x8d2/0xb30 [ 90.620814] do_mprotect_pkey+0x87e/0xd40 [ 90.621338] __x64_sys_mprotect+0x78/0xc0 [ 90.621884] do_syscall_64+0x3f/0x90 [ 90.622357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 90.623006] [ 90.623222] Freed by task 213: [ 90.623618] kasan_save_stack+0x22/0x50 [ 90.624121] kasan_set_track+0x25/0x30 [ 90.624618] kasan_save_free_info+0x2b/0x50 [ 90.625161] __kasan_slab_free+0x10a/0x190 [ 90.625732] kmem_cache_free+0x10d/0x4d0 [ 90.626254] rcu_core+0x8c8/0x2860 [ 90.626717] __do_softirq+0x1b7/0x7d4 [ 90.627198] [ 90.627419] Last potentially related work creation: [ 90.628010] kasan_save_stack+0x22/0x50 [ 90.628519] __kasan_record_aux_stack+0x8e/0xa0 [ 90.629101] __call_rcu_common.constprop.0+0x6a/0xb90 [ 90.629765] remove_vma+0x139/0x170 [ 90.630217] do_vmi_align_munmap+0xd4a/0x11f0 [ 90.630771] do_vmi_munmap+0x1f1/0x2b0 [ 90.631254] __vm_munmap+0x138/0x3a0 [ 90.631718] __x64_sys_munmap+0x59/0x80 [ 90.632217] do_syscall_64+0x3f/0x90 [ 90.632700] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 90.633338] [ 90.633551] Second to last potentially related work creation: [ 90.634249] kasan_save_stack+0x22/0x50 [ 90.634754] __kasan_record_aux_stack+0x8e/0xa0 [ 90.635325] __call_rcu_common.constprop.0+0x6a/0xb90 [ 90.635972] remove_vma+0x139/0x170 [ 90.636422] do_vmi_align_munmap+0xd4a/0x11f0 [ 90.636974] do_vmi_munmap+0x1f1/0x2b0 [ 90.637464] mmap_region+0x1f9/0x2660 [ 90.637958] do_mmap+0x854/0xf00 [ 90.638391] vm_mmap_pgoff+0x1a6/0x3a0 [ 90.638890] ksys_mmap_pgoff+0x3af/0x500 [ 90.639389] do_syscall_64+0x3f/0x90 [ 90.639863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 90.640501] [ 90.640721] The buggy address belongs to the object at ffff88800e758e80 [ 90.640721] which belongs to the cache vm_area_struct of size 168 [ 90.642197] The buggy address is located 88 bytes inside of [ 90.642197] freed 168-byte region [ffff88800e758e80, ffff88800e758f28) [ 90.643604] [ 90.643821] The buggy address belongs to the physical page: [ 90.644481] page:00000000a2e877bf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe758 [ 90.645561] memcg:ffff88800e059901 [ 90.645993] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 90.646687] page_type: 0xffffffff() [ 90.647143] raw: 0100000000000200 ffff88800879fc80 ffffea000038ccc0 dead000000000005 [ 90.648059] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e059901 [ 90.648962] page dumped because: kasan: bad access detected [ 90.649633] [ 90.649850] Memory state around the buggy address: [ 90.650424] ffff88800e758d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 90.651292] ffff88800e758e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 90.652166] >ffff88800e758e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 90.653038] ^ [ 90.653784] ffff88800e758f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 90.654638] ffff88800e758f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 90.655496] ================================================================== [ 90.656519] Disabling lock debugging due to kernel taint [ 92.481505] BUG: Bad rss-counter state mm:000000001d030cdf type:MM_FILEPAGES val:33 [ 92.482344] BUG: Bad rss-counter state mm:000000001d030cdf type:MM_ANONPAGES val:22 [ 92.878975] BUG: Bad rss-counter state mm:0000000017e69389 type:MM_FILEPAGES val:33 [ 92.880012] BUG: Bad rss-counter state mm:0000000017e69389 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12673' (ECDSA) to the list of known hosts. 2023/06/19 20:56:31 fuzzer started 2023/06/19 20:56:31 dialing manager at localhost:44161 2023/06/19 20:56:31 checking machine... 2023/06/19 20:56:31 checking revisions... [ 93.505045] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:56:31 testing simple program... [ 93.579854] cgroup: Unknown subsys name 'net' [ 93.635192] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:55:32 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff83698eb6 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff88800d8b2640 RSP=ffff88800f707990 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000014 R13=0000000000000000 R14=ffff88800f707e70 R15=0000000000000014 RIP=ffffffff83698ebe 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 00007fa6593df900 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=00007fff5f519000 CR3=000000001a076000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007fbe8ec252e0 CR3=000000000c880000 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=8a3061ac6061b592174bc4f3ace91a79 XMM02=00000000001240a8eff9b2d0a8fce9cb XMM03=00000000001241782c67c8bc2e329bc3 XMM04=100b87e0477a843200000000000ae988 XMM05=e4cb8bb95a7664b60000000000139c80 XMM06=98f3863043c90aa00000000000138ae8 XMM07=e042d86d42eb936e0000000000128a68 XMM08=be5138b9233f29490000000000124178 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000