syzkaller login: [ 121.247324] BUG: Bad rss-counter state mm:00000000ade08a4a type:MM_FILEPAGES val:33 [ 121.248098] BUG: Bad rss-counter state mm:00000000ade08a4a type:MM_ANONPAGES val:22 [ 121.394600] ================================================================== [ 121.395513] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 121.396462] Read of size 8 at addr ffff88800f0d2228 by task sshd/220 [ 121.397236] [ 121.397553] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 121.398606] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 121.399624] Call Trace: [ 121.399964] [ 121.400252] dump_stack_lvl+0x91/0xf0 [ 121.400756] print_report+0xcc/0x620 [ 121.401249] ? __virt_addr_valid+0x102/0x340 [ 121.401808] ? vma_interval_tree_remove+0xc75/0xec0 [ 121.402478] ? vma_interval_tree_remove+0xc75/0xec0 [ 121.403108] kasan_report+0xbe/0xf0 [ 121.403590] ? vma_interval_tree_remove+0xc75/0xec0 [ 121.404235] vma_interval_tree_remove+0xc75/0xec0 [ 121.404862] vma_prepare+0xc54/0x11a0 [ 121.405341] __split_vma+0x5af/0x950 [ 121.405813] ? __pfx___split_vma+0x10/0x10 [ 121.406351] ? find_held_lock+0x2c/0x110 [ 121.406894] do_vmi_align_munmap+0x2ba/0x11f0 [ 121.407467] ? lock_is_held_type+0x9f/0x120 [ 121.408001] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 121.408613] ? mtree_range_walk+0x632/0x900 [ 121.409172] ? mas_walk+0x5c7/0x7c0 [ 121.409653] do_vmi_munmap+0x1f1/0x2b0 [ 121.410174] mmap_region+0x1f9/0x2660 [ 121.410653] ? vm_mmap_pgoff+0x15c/0x3a0 [ 121.411186] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 121.411944] ? __pfx_lock_acquire+0x10/0x10 [ 121.412485] ? __pfx_mmap_region+0x10/0x10 [ 121.413015] ? security_mmap_addr+0x7d/0xa0 [ 121.413552] ? get_unmapped_area+0x1f5/0x3f0 [ 121.414126] do_mmap+0x854/0xf00 [ 121.414562] vm_mmap_pgoff+0x1a6/0x3a0 [ 121.415059] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 121.415623] ksys_mmap_pgoff+0x3af/0x500 [ 121.416135] do_syscall_64+0x3f/0x90 [ 121.416612] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 121.417271] RIP: 0033:0x7f1399d8ad82 [ 121.417733] 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 [ 121.419925] RSP: 002b:00007ffc3c2c2208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 121.420834] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1399d8ad82 [ 121.421699] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f13991c4000 [ 121.422570] RBP: 00007f13991c4000 R08: 0000000000000009 R09: 0000000000001000 [ 121.423415] R10: 0000000000000812 R11: 0000000000000206 R12: 000055da93bb4f70 [ 121.424261] R13: 00007ffc3c2c2220 R14: 00007ffc3c2c2250 R15: 00007ffc3c2c25b0 [ 121.425125] [ 121.425418] [ 121.425636] Allocated by task 213: [ 121.426079] kasan_save_stack+0x22/0x50 [ 121.426585] kasan_set_track+0x25/0x30 [ 121.427079] __kasan_slab_alloc+0x59/0x70 [ 121.427608] kmem_cache_alloc+0x16b/0x370 [ 121.428124] vm_area_dup+0x20/0x160 [ 121.428583] __split_vma+0x170/0x950 [ 121.429060] split_vma+0xc6/0x110 [ 121.429505] mprotect_fixup+0x8d2/0xb30 [ 121.430028] do_mprotect_pkey+0x87e/0xd40 [ 121.430543] __x64_sys_mprotect+0x78/0xc0 [ 121.431074] do_syscall_64+0x3f/0x90 [ 121.431552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 121.432187] [ 121.432410] Freed by task 213: [ 121.432809] kasan_save_stack+0x22/0x50 [ 121.433313] kasan_set_track+0x25/0x30 [ 121.433803] kasan_save_free_info+0x2b/0x50 [ 121.434353] __kasan_slab_free+0x10a/0x190 [ 121.434892] kmem_cache_free+0x10d/0x4d0 [ 121.435400] rcu_core+0x8c8/0x2860 [ 121.435849] __do_softirq+0x1b7/0x7d4 [ 121.436333] [ 121.436554] Last potentially related work creation: [ 121.437135] kasan_save_stack+0x22/0x50 [ 121.437650] __kasan_record_aux_stack+0x8e/0xa0 [ 121.438235] __call_rcu_common.constprop.0+0x6a/0xb90 [ 121.438878] remove_vma+0x139/0x170 [ 121.439330] do_vmi_align_munmap+0xd4a/0x11f0 [ 121.439884] do_vmi_munmap+0x1f1/0x2b0 [ 121.440371] __vm_munmap+0x138/0x3a0 [ 121.440839] __x64_sys_munmap+0x59/0x80 [ 121.441336] do_syscall_64+0x3f/0x90 [ 121.441810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 121.442467] [ 121.442685] The buggy address belongs to the object at ffff88800f0d21d0 [ 121.442685] which belongs to the cache vm_area_struct of size 168 [ 121.444158] The buggy address is located 88 bytes inside of [ 121.444158] freed 168-byte region [ffff88800f0d21d0, ffff88800f0d2278) [ 121.445561] [ 121.445780] The buggy address belongs to the physical page: [ 121.446459] page:00000000c2d910f2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0d2 [ 121.447567] memcg:ffff888016f64401 [ 121.447995] flags: 0x100000000000200(slab|node=0|zone=1) [ 121.448639] page_type: 0xffffffff() [ 121.449095] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 121.450029] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016f64401 [ 121.450942] page dumped because: kasan: bad access detected [ 121.451601] [ 121.451820] Memory state around the buggy address: [ 121.452401] ffff88800f0d2100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 121.453269] ffff88800f0d2180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 121.454148] >ffff88800f0d2200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 121.454999] ^ [ 121.455565] ffff88800f0d2280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 121.456440] ffff88800f0d2300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 121.457308] ================================================================== [ 121.458420] Disabling lock debugging due to kernel taint [ 123.443903] BUG: Bad rss-counter state mm:00000000dc5df01b type:MM_FILEPAGES val:33 [ 123.445107] BUG: Bad rss-counter state mm:00000000dc5df01b type:MM_ANONPAGES val:22 [ 123.900878] BUG: Bad rss-counter state mm:00000000f9c2487b type:MM_FILEPAGES val:33 [ 123.901952] BUG: Bad rss-counter state mm:00000000f9c2487b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61105' (ECDSA) to the list of known hosts. 2023/06/19 20:47:03 fuzzer started 2023/06/19 20:47:03 dialing manager at localhost:44161 2023/06/19 20:47:03 checking machine... 2023/06/19 20:47:03 checking revisions... [ 124.613027] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:47:03 testing simple program... [ 124.654814] cgroup: Unknown subsys name 'net' [ 124.710229] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:45:32 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff1100d9c1353 RSI=ffffffff816a958c RDI=ffff88806ce09a98 RBP=ffff88806ce09b30 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000001cfe6 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888015980000 R15=ffff88806ce09a98 RIP=ffffffff8113060b 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 00007fb3fddc1700 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=00007f5ece7ea900 CR3=000000000f0da000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732032303a3734 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343639 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000dc0 RCX=ffffffff812d869a RDX=0000000080000000 RSI=0000000000000dc0 RDI=ffff8880087b6780 RBP=ffff8880165f7d08 RSP=ffff8880165f7cb8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff8880087b6780 R13=ffff88800ec54700 R14=0000000000000000 R15=ffffffff8186cb26 RIP=ffffffff816cbff4 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 00007f8266c11900 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=00007ffe3097a000 CR3=000000001cd38000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000