syzkaller login: [ 30.820111] BUG: Bad rss-counter state mm:00000000605367b0 type:MM_FILEPAGES val:33 [ 30.821417] BUG: Bad rss-counter state mm:00000000605367b0 type:MM_ANONPAGES val:22 [ 30.856696] ================================================================== [ 30.857896] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.859076] Read of size 8 at addr ffff88800fbde6b0 by task sshd/221 [ 30.860036] [ 30.860313] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.861366] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.862540] Call Trace: [ 30.862920] <TASK> [ 30.863262] dump_stack_lvl+0x91/0xf0 [ 30.863845] print_report+0xcc/0x620 [ 30.864423] ? __virt_addr_valid+0x102/0x340 [ 30.865076] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.865813] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.866544] kasan_report+0xbe/0xf0 [ 30.867111] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.867849] vma_interval_tree_remove+0xc75/0xec0 [ 30.868600] vma_prepare+0xc54/0x11a0 [ 30.869174] __split_vma+0x5af/0x950 [ 30.869740] ? __pfx___split_vma+0x10/0x10 [ 30.870374] ? find_held_lock+0x2c/0x110 [ 30.871003] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.871680] ? lock_is_held_type+0x9f/0x120 [ 30.872342] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.873065] ? mtree_range_walk+0x632/0x900 [ 30.873722] ? mas_walk+0x5c7/0x7c0 [ 30.874286] do_vmi_munmap+0x1f1/0x2b0 [ 30.874876] mmap_region+0x1f9/0x2660 [ 30.875452] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.876069] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.876926] ? __pfx_lock_acquire+0x10/0x10 [ 30.877567] ? __pfx_mmap_region+0x10/0x10 [ 30.878206] ? security_mmap_addr+0x7d/0xa0 [ 30.878843] ? get_unmapped_area+0x1f5/0x3f0 [ 30.879507] do_mmap+0x854/0xf00 [ 30.880027] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.880645] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.881324] ksys_mmap_pgoff+0x3af/0x500 [ 30.881939] do_syscall_64+0x3f/0x90 [ 30.882513] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.883284] RIP: 0033:0x7f7decfd1d82 [ 30.883832] 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 [ 30.886424] RSP: 002b:00007ffdb0157c28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.887510] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7decfd1d82 [ 30.888539] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7dec40b000 [ 30.889560] RBP: 00007f7dec40b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.890570] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b9b061ef60 [ 30.891589] R13: 00007ffdb0157c40 R14: 00007ffdb0157c70 R15: 00007ffdb0157fd0 [ 30.892647] </TASK> [ 30.892990] [ 30.893245] Allocated by task 214: [ 30.893761] kasan_save_stack+0x22/0x50 [ 30.894359] kasan_set_track+0x25/0x30 [ 30.894943] __kasan_slab_alloc+0x59/0x70 [ 30.895574] kmem_cache_alloc+0x16b/0x370 [ 30.896184] vm_area_dup+0x20/0x160 [ 30.896746] __split_vma+0x170/0x950 [ 30.897293] split_vma+0xc6/0x110 [ 30.897814] mprotect_fixup+0x8d2/0xb30 [ 30.898405] do_mprotect_pkey+0x87e/0xd40 [ 30.899023] __x64_sys_mprotect+0x78/0xc0 [ 30.899644] do_syscall_64+0x3f/0x90 [ 30.900212] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.901001] [ 30.901253] Freed by task 19: [ 30.901622] kasan_save_stack+0x22/0x50 [ 30.902100] kasan_set_track+0x25/0x30 [ 30.902574] kasan_save_free_info+0x2b/0x50 [ 30.903079] __kasan_slab_free+0x10a/0x190 [ 30.903584] kmem_cache_free+0x10d/0x4d0 [ 30.904070] rcu_core+0x8c8/0x2860 [ 30.904507] __do_softirq+0x1b7/0x7d4 [ 30.904965] [ 30.905171] Last potentially related work creation: [ 30.905730] kasan_save_stack+0x22/0x50 [ 30.906210] __kasan_record_aux_stack+0x8e/0xa0 [ 30.906760] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.907367] remove_vma+0x139/0x170 [ 30.907794] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.908330] do_vmi_munmap+0x1f1/0x2b0 [ 30.908797] __vm_munmap+0x138/0x3a0 [ 30.909268] __x64_sys_munmap+0x59/0x80 [ 30.909763] do_syscall_64+0x3f/0x90 [ 30.910233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.910864] [ 30.911080] The buggy address belongs to the object at ffff88800fbde658 [ 30.911080] which belongs to the cache vm_area_struct of size 168 [ 30.912584] The buggy address is located 88 bytes inside of [ 30.912584] freed 168-byte region [ffff88800fbde658, ffff88800fbde700) [ 30.913986] [ 30.914201] The buggy address belongs to the physical page: [ 30.914866] page:00000000bda7bf16 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfbde [ 30.915935] memcg:ffff88800e49b301 [ 30.916375] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.917015] page_type: 0xffffffff() [ 30.917468] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.918390] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e49b301 [ 30.919302] page dumped because: kasan: bad access detected [ 30.919973] [ 30.920187] Memory state around the buggy address: [ 30.920800] ffff88800fbde580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.921662] ffff88800fbde600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.922516] >ffff88800fbde680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.923375] ^ [ 30.923963] ffff88800fbde700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.924820] ffff88800fbde780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.925683] ================================================================== [ 30.926806] Disabling lock debugging due to kernel taint [ 33.469223] BUG: Bad rss-counter state mm:00000000bd1a4f60 type:MM_FILEPAGES val:33 [ 33.469858] BUG: Bad rss-counter state mm:00000000bd1a4f60 type:MM_ANONPAGES val:22 [ 33.866732] BUG: Bad rss-counter state mm:0000000058efdc1e type:MM_FILEPAGES val:33 [ 33.867733] BUG: Bad rss-counter state mm:0000000058efdc1e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27615' (ECDSA) to the list of known hosts. 2023/06/21 03:22:35 fuzzer started 2023/06/21 03:22:36 dialing manager at localhost:36067 2023/06/21 03:22:36 checking machine... 2023/06/21 03:22:36 checking revisions... [ 34.581929] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:22:36 testing simple program... [ 34.635662] cgroup: Unknown subsys name 'net' [ 34.690207] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:22:35 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fd0916f1da0 CR3=0000000016e9e000 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=2035333a32323a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a32323a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f94658f2008 CR3=000000000db8a000 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=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