syzkaller login: [ 30.681672] BUG: Bad rss-counter state mm:00000000c1e9479d type:MM_FILEPAGES val:33 [ 30.683027] BUG: Bad rss-counter state mm:00000000c1e9479d type:MM_ANONPAGES val:22 [ 30.821780] ================================================================== [ 30.822851] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.823964] Read of size 8 at addr ffff88801032fed8 by task sshd/220 [ 30.824979] [ 30.825238] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.826242] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.827399] Call Trace: [ 30.827777] [ 30.828152] dump_stack_lvl+0x91/0xf0 [ 30.828739] print_report+0xcc/0x620 [ 30.829308] ? __virt_addr_valid+0x102/0x340 [ 30.829960] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.830697] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.831422] kasan_report+0xbe/0xf0 [ 30.831987] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.832711] vma_interval_tree_remove+0xc75/0xec0 [ 30.833411] vma_prepare+0xc54/0x11a0 [ 30.833969] __split_vma+0x5af/0x950 [ 30.834520] ? __pfx___split_vma+0x10/0x10 [ 30.835139] ? find_held_lock+0x2c/0x110 [ 30.835739] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.836408] ? lock_is_held_type+0x9f/0x120 [ 30.837047] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.837744] ? mtree_range_walk+0x632/0x900 [ 30.838376] ? mas_walk+0x5c7/0x7c0 [ 30.838950] do_vmi_munmap+0x1f1/0x2b0 [ 30.839537] mmap_region+0x1f9/0x2660 [ 30.840122] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.840746] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.841591] ? __pfx_lock_acquire+0x10/0x10 [ 30.842224] ? __pfx_mmap_region+0x10/0x10 [ 30.842850] ? security_mmap_addr+0x7d/0xa0 [ 30.843482] ? get_unmapped_area+0x1f5/0x3f0 [ 30.844155] do_mmap+0x854/0xf00 [ 30.844692] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.845268] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.845924] ksys_mmap_pgoff+0x3af/0x500 [ 30.846523] do_syscall_64+0x3f/0x90 [ 30.847101] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.847879] RIP: 0033:0x7fb67007dd82 [ 30.848422] 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 [ 30.850986] RSP: 002b:00007ffc6cfdd818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.852097] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb67007dd82 [ 30.853102] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb66f4b7000 [ 30.854112] RBP: 00007fb66f4b7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.855148] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bb44d53f70 [ 30.856187] R13: 00007ffc6cfdd830 R14: 00007ffc6cfdd860 R15: 00007ffc6cfddbc0 [ 30.857210] [ 30.857549] [ 30.857803] Allocated by task 213: [ 30.858307] kasan_save_stack+0x22/0x50 [ 30.858901] kasan_set_track+0x25/0x30 [ 30.859499] __kasan_slab_alloc+0x59/0x70 [ 30.860150] kmem_cache_alloc+0x16b/0x370 [ 30.860753] vm_area_dup+0x20/0x160 [ 30.861288] __split_vma+0x170/0x950 [ 30.861847] split_vma+0xc6/0x110 [ 30.862372] mprotect_fixup+0x8d2/0xb30 [ 30.862960] do_mprotect_pkey+0x87e/0xd40 [ 30.863589] __x64_sys_mprotect+0x78/0xc0 [ 30.864234] do_syscall_64+0x3f/0x90 [ 30.864795] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.865560] [ 30.865814] Freed by task 213: [ 30.866289] kasan_save_stack+0x22/0x50 [ 30.866879] kasan_set_track+0x25/0x30 [ 30.867472] kasan_save_free_info+0x2b/0x50 [ 30.868111] __kasan_slab_free+0x10a/0x190 [ 30.868752] kmem_cache_free+0x10d/0x4d0 [ 30.869363] rcu_core+0x8c8/0x2860 [ 30.869884] __do_softirq+0x1b7/0x7d4 [ 30.870447] [ 30.870695] Last potentially related work creation: [ 30.871392] kasan_save_stack+0x22/0x50 [ 30.872006] __kasan_record_aux_stack+0x8e/0xa0 [ 30.872690] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.873457] remove_vma+0x139/0x170 [ 30.873997] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.874662] do_vmi_munmap+0x1f1/0x2b0 [ 30.875227] __vm_munmap+0x138/0x3a0 [ 30.875789] __x64_sys_munmap+0x59/0x80 [ 30.876384] do_syscall_64+0x3f/0x90 [ 30.876943] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.877701] [ 30.877954] The buggy address belongs to the object at ffff88801032fe80 [ 30.877954] which belongs to the cache vm_area_struct of size 168 [ 30.879695] The buggy address is located 88 bytes inside of [ 30.879695] freed 168-byte region [ffff88801032fe80, ffff88801032ff28) [ 30.881353] [ 30.881608] The buggy address belongs to the physical page: [ 30.882390] page:00000000b34389c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1032f [ 30.883708] memcg:ffff88800db8f201 [ 30.884230] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.885006] page_type: 0xffffffff() [ 30.885543] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.886656] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db8f201 [ 30.887737] page dumped because: kasan: bad access detected [ 30.888526] [ 30.888782] Memory state around the buggy address: [ 30.889466] ffff88801032fd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.890478] ffff88801032fe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.891499] >ffff88801032fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.892532] ^ [ 30.893403] ffff88801032ff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.894436] ffff88801032ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.895459] ================================================================== [ 30.896672] Disabling lock debugging due to kernel taint [ 32.837016] BUG: Bad rss-counter state mm:000000004c65b959 type:MM_FILEPAGES val:33 [ 32.838276] BUG: Bad rss-counter state mm:000000004c65b959 type:MM_ANONPAGES val:22 [ 33.394835] BUG: Bad rss-counter state mm:00000000f22a8e46 type:MM_FILEPAGES val:33 [ 33.396031] BUG: Bad rss-counter state mm:00000000f22a8e46 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7902' (ECDSA) to the list of known hosts. 2023/06/20 22:14:04 fuzzer started 2023/06/20 22:14:05 dialing manager at localhost:36067 2023/06/20 22:14:05 checking machine... 2023/06/20 22:14:05 checking revisions... [ 34.010061] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:14:05 testing simple program... [ 34.049272] cgroup: Unknown subsys name 'net' [ 34.086730] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:14:04 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffff88800cf3f518 RDX=1ffff110019e7e9b RSI=1ffff110019e7e91 RDI=ffff88800cf3f478 RBP=ffff88800cf3f4d0 RSP=ffff88800cf3f3b8 R8 =0000000000000000 R9 =0000000000000000 R10=ffff88800cf3f478 R11=00000000000b6a61 R12=ffff88800cf3f4d8 R13=ffff88800cf3f4c0 R14=ffff88800cf3f4c0 R15=ffff88800cf3f478 RIP=ffffffff81130682 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 00007fdeda75f700 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=00007fdbb0a9c0b0 CR3=00000000159e0000 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=2034303a34313a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a34313a3232203032 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=ffff888008c04400 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=00007f8d78285dc0 CR3=000000000efa2000 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=743c17fe07a480a48340b9a16d1d6c5b XMM02=000000000011b410ec2efd57dc4c00df XMM03=0000000000122118b5e1d22dcce4e67f XMM04=24110c019d5cb93900000000000ae988 XMM05=19e9129bd510f2350000000000131f90 XMM06=c2f2737ec08282ff0000000000130df8 XMM07=e042d86d42eb936e0000000000122398 XMM08=b5e1d22dcce4e67f000000000011b470 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000