syzkaller login: [ 39.804290] BUG: Bad rss-counter state mm:00000000b424a5da type:MM_FILEPAGES val:33 [ 39.805777] BUG: Bad rss-counter state mm:00000000b424a5da type:MM_ANONPAGES val:22 [ 39.974550] ================================================================== [ 39.975471] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.976418] Read of size 8 at addr ffff88800cc03228 by task sshd/219 [ 39.977205] [ 39.977492] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.978360] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.979338] Call Trace: [ 39.979687] [ 39.979975] dump_stack_lvl+0x91/0xf0 [ 39.980471] print_report+0xcc/0x620 [ 39.980986] ? __virt_addr_valid+0x102/0x340 [ 39.981547] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.982167] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.982786] kasan_report+0xbe/0xf0 [ 39.983271] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.983896] vma_interval_tree_remove+0xc75/0xec0 [ 39.984505] vma_prepare+0xc54/0x11a0 [ 39.985001] __split_vma+0x5af/0x950 [ 39.985483] ? __pfx___split_vma+0x10/0x10 [ 39.986019] ? find_held_lock+0x2c/0x110 [ 39.986553] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.987126] ? lock_is_held_type+0x9f/0x120 [ 39.987682] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.988322] ? mtree_range_walk+0x632/0x900 [ 39.988928] ? mas_walk+0x5c7/0x7c0 [ 39.989426] do_vmi_munmap+0x1f1/0x2b0 [ 39.989954] mmap_region+0x1f9/0x2660 [ 39.990459] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.990995] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.991760] ? __pfx_lock_acquire+0x10/0x10 [ 39.992329] ? __pfx_mmap_region+0x10/0x10 [ 39.992912] ? security_mmap_addr+0x7d/0xa0 [ 39.993479] ? get_unmapped_area+0x1f5/0x3f0 [ 39.994056] do_mmap+0x854/0xf00 [ 39.994530] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.995060] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.995657] ksys_mmap_pgoff+0x3af/0x500 [ 39.996195] do_syscall_64+0x3f/0x90 [ 39.996719] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.997395] RIP: 0033:0x7fccb970ad82 [ 39.997878] 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 [ 40.000148] RSP: 002b:00007ffd82623448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.001131] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fccb970ad82 [ 40.002031] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fccb8b44000 [ 40.002924] RBP: 00007fccb8b44000 R08: 0000000000000009 R09: 0000000000001000 [ 40.003840] R10: 0000000000000812 R11: 0000000000000206 R12: 00005642dc684980 [ 40.004763] R13: 00007ffd82623460 R14: 00007ffd82623490 R15: 00007ffd826237f0 [ 40.005666] [ 40.005973] [ 40.006207] Allocated by task 212: [ 40.006674] kasan_save_stack+0x22/0x50 [ 40.007206] kasan_set_track+0x25/0x30 [ 40.007734] __kasan_slab_alloc+0x59/0x70 [ 40.008294] kmem_cache_alloc+0x16b/0x370 [ 40.008854] vm_area_dup+0x20/0x160 [ 40.009343] __split_vma+0x170/0x950 [ 40.009842] split_vma+0xc6/0x110 [ 40.010311] mprotect_fixup+0x8d2/0xb30 [ 40.010846] do_mprotect_pkey+0x87e/0xd40 [ 40.011402] __x64_sys_mprotect+0x78/0xc0 [ 40.011949] do_syscall_64+0x3f/0x90 [ 40.012457] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.013149] [ 40.013385] Freed by task 203: [ 40.013804] kasan_save_stack+0x22/0x50 [ 40.014341] kasan_set_track+0x25/0x30 [ 40.014880] kasan_save_free_info+0x2b/0x50 [ 40.015501] __kasan_slab_free+0x10a/0x190 [ 40.016072] kmem_cache_free+0x10d/0x4d0 [ 40.016627] rcu_core+0x8c8/0x2860 [ 40.017102] __do_softirq+0x1b7/0x7d4 [ 40.017614] [ 40.017847] Last potentially related work creation: [ 40.018474] kasan_save_stack+0x22/0x50 [ 40.019010] __kasan_record_aux_stack+0x8e/0xa0 [ 40.019628] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.020313] remove_vma+0x139/0x170 [ 40.020818] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.021409] do_vmi_munmap+0x1f1/0x2b0 [ 40.021922] __vm_munmap+0x138/0x3a0 [ 40.022421] __x64_sys_munmap+0x59/0x80 [ 40.022955] do_syscall_64+0x3f/0x90 [ 40.023457] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.024158] [ 40.024389] Second to last potentially related work creation: [ 40.025162] kasan_save_stack+0x22/0x50 [ 40.025713] __kasan_record_aux_stack+0x8e/0xa0 [ 40.026341] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.027043] remove_vma+0x139/0x170 [ 40.027540] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.028151] do_vmi_munmap+0x1f1/0x2b0 [ 40.028697] mmap_region+0x1f9/0x2660 [ 40.029224] do_mmap+0x854/0xf00 [ 40.029696] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.030234] ksys_mmap_pgoff+0x3af/0x500 [ 40.030783] do_syscall_64+0x3f/0x90 [ 40.031305] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.032010] [ 40.032242] The buggy address belongs to the object at ffff88800cc031d0 [ 40.032242] which belongs to the cache vm_area_struct of size 168 [ 40.033862] The buggy address is located 88 bytes inside of [ 40.033862] freed 168-byte region [ffff88800cc031d0, ffff88800cc03278) [ 40.035403] [ 40.035635] The buggy address belongs to the physical page: [ 40.036358] page:000000000bf7e7a4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcc03 [ 40.037572] memcg:ffff88800c689401 [ 40.038044] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.038805] page_type: 0xffffffff() [ 40.039300] raw: 0100000000000200 ffff88800879fc80 ffffea000031a080 dead000000000005 [ 40.040314] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c689401 [ 40.041321] page dumped because: kasan: bad access detected [ 40.042056] [ 40.042291] Memory state around the buggy address: [ 40.042935] ffff88800cc03100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.043877] ffff88800cc03180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 40.044824] >ffff88800cc03200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 40.045756] ^ [ 40.046367] ffff88800cc03280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 40.047307] ffff88800cc03300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 40.048253] ================================================================== [ 40.049406] Disabling lock debugging due to kernel taint [ 42.175669] BUG: Bad rss-counter state mm:00000000b117236d type:MM_FILEPAGES val:33 [ 42.176775] BUG: Bad rss-counter state mm:00000000b117236d type:MM_ANONPAGES val:22 [ 42.623966] BUG: Bad rss-counter state mm:00000000ac97ff6b type:MM_FILEPAGES val:33 [ 42.625382] BUG: Bad rss-counter state mm:00000000ac97ff6b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7795' (ECDSA) to the list of known hosts. 2023/06/20 02:43:00 fuzzer started 2023/06/20 02:43:00 dialing manager at localhost:44161 2023/06/20 02:43:00 checking machine... 2023/06/20 02:43:00 checking revisions... [ 43.343782] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:43:00 testing simple program... [ 43.384033] cgroup: Unknown subsys name 'net' [ 43.448443] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:42:59 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff1100d9c135b RSI=ffffffff81288f48 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000ba82 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff811306da RFL=00000212 [----A--] 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=00007fe6c4568c60 CR3=000000000fbd4000 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=32343a3230203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323630 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=1ffffffff0c0917c RBX=ffffffff86048be4 RCX=ffffffff844b9c26 RDX=0000000000000000 RSI=ffffffff864a97e4 RDI=ffffffff86048be4 RBP=ffffffff86048be4 RSP=ffff888018a16ca0 R8 =ffffffff864a97e4 R9 =ffff888018a16d98 R10=0000000000038001 R11=00000000000b3e04 R12=ffffffff86048be4 R13=ffffffff86048be4 R14=ffffffff86048be4 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-C] 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 00007ff452e19900 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=00007ff452dde008 CR3=000000000e39a000 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