syzkaller login: [ 58.724600] BUG: Bad rss-counter state mm:0000000024cec3af type:MM_FILEPAGES val:33 [ 58.725241] BUG: Bad rss-counter state mm:0000000024cec3af type:MM_ANONPAGES val:22 [ 58.928158] ================================================================== [ 58.929703] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 58.931124] Read of size 8 at addr ffff88800fe65798 by task sshd/221 [ 58.932554] [ 58.932932] CPU: 1 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 58.934865] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 58.936712] Call Trace: [ 58.937268] [ 58.937760] dump_stack_lvl+0x91/0xf0 [ 58.938643] print_report+0xcc/0x620 [ 58.939485] ? __virt_addr_valid+0x102/0x340 [ 58.940480] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.941573] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.942747] kasan_report+0xbe/0xf0 [ 58.943533] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.944676] vma_interval_tree_remove+0xc75/0xec0 [ 58.945788] vma_prepare+0xc54/0x11a0 [ 58.946672] __split_vma+0x5af/0x950 [ 58.947527] ? __pfx___split_vma+0x10/0x10 [ 58.948482] ? find_held_lock+0x2c/0x110 [ 58.949410] do_vmi_align_munmap+0x2ba/0x11f0 [ 58.950416] ? lock_is_held_type+0x9f/0x120 [ 58.951431] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 58.952531] ? mtree_range_walk+0x632/0x900 [ 58.953517] ? mas_walk+0x5c7/0x7c0 [ 58.954335] do_vmi_munmap+0x1f1/0x2b0 [ 58.956089] mmap_region+0x1f9/0x2660 [ 58.956953] ? vm_mmap_pgoff+0x15c/0x3a0 [ 58.957847] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 58.959137] ? __pfx_lock_acquire+0x10/0x10 [ 58.960080] ? __pfx_mmap_region+0x10/0x10 [ 58.961013] ? security_mmap_addr+0x7d/0xa0 [ 58.961968] ? get_unmapped_area+0x1f5/0x3f0 [ 58.962955] do_mmap+0x854/0xf00 [ 58.963691] vm_mmap_pgoff+0x1a6/0x3a0 [ 58.964543] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 58.965751] ksys_mmap_pgoff+0x3af/0x500 [ 58.966082] do_syscall_64+0x3f/0x90 [ 58.966389] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.967399] RIP: 0033:0x7f1102272d82 [ 58.968222] 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 [ 58.972785] RSP: 002b:00007ffe862bf4c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 58.974464] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1102272d82 [ 58.976059] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f11016ac000 [ 58.977633] RBP: 00007f11016ac000 R08: 0000000000000009 R09: 0000000000001000 [ 58.979240] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c31f8b6ec0 [ 58.981532] R13: 00007ffe862bf4e0 R14: 00007ffe862bf510 R15: 00007ffe862bf870 [ 58.983139] [ 58.983649] [ 58.984010] Allocated by task 212: [ 58.984786] kasan_save_stack+0x22/0x50 [ 58.985679] kasan_set_track+0x25/0x30 [ 58.986552] __kasan_slab_alloc+0x59/0x70 [ 58.987861] kmem_cache_alloc+0x16b/0x370 [ 58.988203] vm_area_dup+0x20/0x160 [ 58.988504] __split_vma+0x170/0x950 [ 58.988835] split_vma+0xc6/0x110 [ 58.989141] mprotect_fixup+0x8d2/0xb30 [ 58.989475] do_mprotect_pkey+0x87e/0xd40 [ 58.989816] __x64_sys_mprotect+0x78/0xc0 [ 58.990158] do_syscall_64+0x3f/0x90 [ 58.990470] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.991553] [ 58.991923] Freed by task 212: [ 58.992626] kasan_save_stack+0x22/0x50 [ 58.993520] kasan_set_track+0x25/0x30 [ 58.994393] kasan_save_free_info+0x2b/0x50 [ 58.995433] __kasan_slab_free+0x10a/0x190 [ 58.996385] kmem_cache_free+0x10d/0x4d0 [ 58.997306] rcu_core+0x8c8/0x2860 [ 58.997840] __do_softirq+0x1b7/0x7d4 [ 58.998165] [ 58.998308] Last potentially related work creation: [ 58.998959] kasan_save_stack+0x22/0x50 [ 58.999829] __kasan_record_aux_stack+0x8e/0xa0 [ 59.000851] __call_rcu_common.constprop.0+0x6a/0xb90 [ 59.001984] remove_vma+0x139/0x170 [ 59.002713] do_vmi_align_munmap+0xd4a/0x11f0 [ 59.003094] do_vmi_munmap+0x1f1/0x2b0 [ 59.003422] __vm_munmap+0x138/0x3a0 [ 59.003736] __x64_sys_munmap+0x59/0x80 [ 59.004082] do_syscall_64+0x3f/0x90 [ 59.004399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.004832] [ 59.004978] The buggy address belongs to the object at ffff88800fe65740 [ 59.004978] which belongs to the cache vm_area_struct of size 168 [ 59.005992] The buggy address is located 88 bytes inside of [ 59.005992] freed 168-byte region [ffff88800fe65740, ffff88800fe657e8) [ 59.011659] [ 59.012020] The buggy address belongs to the physical page: [ 59.013253] page:000000009f9e0d48 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe65 [ 59.015338] memcg:ffff88800fe66001 [ 59.016534] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 59.017841] page_type: 0xffffffff() [ 59.018791] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 59.020528] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe66001 [ 59.022303] page dumped because: kasan: bad access detected [ 59.024113] [ 59.024474] Memory state around the buggy address: [ 59.025517] ffff88800fe65680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.027237] ffff88800fe65700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 59.028813] >ffff88800fe65780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 59.030528] ^ [ 59.031457] ffff88800fe65800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 59.033074] ffff88800fe65880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 59.034767] ================================================================== [ 59.036795] Disabling lock debugging due to kernel taint [ 63.285995] BUG: Bad rss-counter state mm:00000000b48de5e2 type:MM_FILEPAGES val:33 [ 63.287124] BUG: Bad rss-counter state mm:00000000b48de5e2 type:MM_ANONPAGES val:22 [ 64.312952] BUG: Bad rss-counter state mm:000000001fa2f969 type:MM_FILEPAGES val:33 [ 64.313612] BUG: Bad rss-counter state mm:000000001fa2f969 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40959' (ECDSA) to the list of known hosts. 2023/06/20 10:07:31 fuzzer started 2023/06/20 10:07:31 dialing manager at localhost:44161 2023/06/20 10:07:31 checking machine... 2023/06/20 10:07:31 checking revisions... [ 65.298744] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:07:31 testing simple program... [ 65.349043] cgroup: Unknown subsys name 'net' [ 65.426694] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:07:02 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffffffff85652988 RCX=0000000000000000 RDX=ffff888019dfd1c0 RSI=ffffffff814c84dd RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888016b8f7d0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=ffff88800dc83800 RIP=ffffffff814c0800 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 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=00007fe588bd6328 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff8880101aa488 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000048 RSI=ffff88800fb7ddb8 RDI=ffff8880101aa4a8 RBP=ffff88800fb7dd98 RSP=ffff88800f5cf978 R8 =0000000000100073 R9 =00000000ffffffff R10=ffff888013e96f00 R11=8000000000000025 R12=ffff8880101aa488 R13=dffffc0000000000 R14=0000000000100073 R15=0000000000000000 RIP=ffffffff8450d0b5 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 00007f9edf0a3900 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=00007fe582d2f280 CR3=000000000e406000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000