syzkaller login: [ 28.793743] BUG: Bad rss-counter state mm:000000000c32e895 type:MM_FILEPAGES val:33 [ 28.795216] BUG: Bad rss-counter state mm:000000000c32e895 type:MM_ANONPAGES val:22 [ 28.954600] ================================================================== [ 28.955575] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.956581] Read of size 8 at addr ffff888009461a50 by task sshd/220 [ 28.957517] [ 28.957748] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.958665] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.959725] Call Trace: [ 28.960065] [ 28.960368] dump_stack_lvl+0x91/0xf0 [ 28.960899] print_report+0xcc/0x620 [ 28.961425] ? __virt_addr_valid+0x102/0x340 [ 28.962010] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.962666] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.963320] kasan_report+0xbe/0xf0 [ 28.963826] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.964489] vma_interval_tree_remove+0xc75/0xec0 [ 28.965137] vma_prepare+0xc54/0x11a0 [ 28.965685] __split_vma+0x5af/0x950 [ 28.966203] ? __pfx___split_vma+0x10/0x10 [ 28.966777] ? find_held_lock+0x2c/0x110 [ 28.967333] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.967945] ? lock_is_held_type+0x9f/0x120 [ 28.968524] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.969172] ? mtree_range_walk+0x632/0x900 [ 28.969793] ? mas_walk+0x5c7/0x7c0 [ 28.970305] do_vmi_munmap+0x1f1/0x2b0 [ 28.970842] mmap_region+0x1f9/0x2660 [ 28.971363] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.971922] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.972686] ? __pfx_lock_acquire+0x10/0x10 [ 28.973263] ? __pfx_mmap_region+0x10/0x10 [ 28.973833] ? security_mmap_addr+0x7d/0xa0 [ 28.974410] ? get_unmapped_area+0x1f5/0x3f0 [ 28.975011] do_mmap+0x854/0xf00 [ 28.975483] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.976020] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.976631] ksys_mmap_pgoff+0x3af/0x500 [ 28.977189] do_syscall_64+0x3f/0x90 [ 28.977725] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.978426] RIP: 0033:0x7f714b785d82 [ 28.978922] 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 [ 28.981214] RSP: 002b:00007ffcbb07f728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.982200] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f714b785d82 [ 28.983113] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f714abbf000 [ 28.984023] RBP: 00007f714abbf000 R08: 0000000000000009 R09: 0000000000001000 [ 28.984940] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560307944ec0 [ 28.985873] R13: 00007ffcbb07f740 R14: 00007ffcbb07f770 R15: 00007ffcbb07fad0 [ 28.986792] [ 28.987112] [ 28.987340] Allocated by task 212: [ 28.987795] kasan_save_stack+0x22/0x50 [ 28.988340] kasan_set_track+0x25/0x30 [ 28.988875] __kasan_slab_alloc+0x59/0x70 [ 28.989450] kmem_cache_alloc+0x16b/0x370 [ 28.990010] vm_area_dup+0x20/0x160 [ 28.990502] __split_vma+0x170/0x950 [ 28.991005] split_vma+0xc6/0x110 [ 28.991482] mprotect_fixup+0x8d2/0xb30 [ 28.992023] do_mprotect_pkey+0x87e/0xd40 [ 28.992595] __x64_sys_mprotect+0x78/0xc0 [ 28.993161] do_syscall_64+0x3f/0x90 [ 28.993687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.994382] [ 28.994616] Freed by task 203: [ 28.995041] kasan_save_stack+0x22/0x50 [ 28.995588] kasan_set_track+0x25/0x30 [ 28.996123] kasan_save_free_info+0x2b/0x50 [ 28.996702] __kasan_slab_free+0x10a/0x190 [ 28.997273] kmem_cache_free+0x10d/0x4d0 [ 28.997827] rcu_core+0x8c8/0x2860 [ 28.998305] __do_softirq+0x1b7/0x7d4 [ 28.998824] [ 28.999058] Last potentially related work creation: [ 28.999685] kasan_save_stack+0x22/0x50 [ 29.000231] __kasan_record_aux_stack+0x8e/0xa0 [ 29.000850] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.001573] remove_vma+0x139/0x170 [ 29.002060] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.002662] do_vmi_munmap+0x1f1/0x2b0 [ 29.003177] __vm_munmap+0x138/0x3a0 [ 29.003687] __x64_sys_munmap+0x59/0x80 [ 29.004219] do_syscall_64+0x3f/0x90 [ 29.004726] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.005424] [ 29.005663] Second to last potentially related work creation: [ 29.006387] kasan_save_stack+0x22/0x50 [ 29.006929] __kasan_record_aux_stack+0x8e/0xa0 [ 29.007545] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.008226] remove_vma+0x139/0x170 [ 29.008704] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.009304] do_vmi_munmap+0x1f1/0x2b0 [ 29.009844] mmap_region+0x1f9/0x2660 [ 29.010354] do_mmap+0x854/0xf00 [ 29.010830] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.011354] ksys_mmap_pgoff+0x3af/0x500 [ 29.011898] do_syscall_64+0x3f/0x90 [ 29.012414] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.013111] [ 29.013346] The buggy address belongs to the object at ffff8880094619f8 [ 29.013346] which belongs to the cache vm_area_struct of size 168 [ 29.014941] The buggy address is located 88 bytes inside of [ 29.014941] freed 168-byte region [ffff8880094619f8, ffff888009461aa0) [ 29.016458] [ 29.016688] The buggy address belongs to the physical page: [ 29.017409] page:000000001a0a6105 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9461 [ 29.018572] memcg:ffff88800e0d3901 [ 29.019023] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.019774] page_type: 0xffffffff() [ 29.020261] raw: 0100000000000200 ffff8880087a0c80 ffffea00003afd40 dead000000000003 [ 29.021243] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0d3901 [ 29.022229] page dumped because: kasan: bad access detected [ 29.022946] [ 29.023174] Memory state around the buggy address: [ 29.023790] ffff888009461900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.024709] ffff888009461980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 29.025630] >ffff888009461a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.026540] ^ [ 29.027293] ffff888009461a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 29.028215] ffff888009461b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.029127] ================================================================== [ 29.030654] Disabling lock debugging due to kernel taint [ 30.752065] BUG: Bad rss-counter state mm:000000009d8f3309 type:MM_FILEPAGES val:33 [ 30.753745] BUG: Bad rss-counter state mm:000000009d8f3309 type:MM_ANONPAGES val:22 [ 31.206084] BUG: Bad rss-counter state mm:00000000b21ca44f type:MM_FILEPAGES val:33 [ 31.207085] BUG: Bad rss-counter state mm:00000000b21ca44f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18833' (ECDSA) to the list of known hosts. 2023/06/21 04:28:00 fuzzer started 2023/06/21 04:28:00 dialing manager at localhost:36067 2023/06/21 04:28:00 checking machine... 2023/06/21 04:28:00 checking revisions... [ 31.925679] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:28:00 testing simple program... [ 31.973197] cgroup: Unknown subsys name 'net' [ 32.016505] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:28:00 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=1ffffffff0ba7c92 RDX=1ffff1100d9c73dc RSI=0000000000000008 RDI=ffff88806ce39ee0 RBP=ffff88800f00f9e8 RSP=ffff88806ce09fe8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8118dd6f RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1f58299900 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=00007f1f577b8040 CR3=000000000d6c6000 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=d3fdd5f48436fbd700000000000aead0 XMM01=8cdec34d38af4c0a00000000000f7b50 XMM02=693bd129e125714a00000000000f7e90 XMM03=2fccd54c36d8a3f300000000000f9c88 XMM04=fa4503a52a6688dc00000000000ae988 XMM05=19e9129bd510f2350000000000132b28 XMM06=65b00dedf4b4377f0000000000131990 XMM07=e042d86d42eb936e00000000001214e0 XMM08=39b53f8bf9b0c17e000000000011a570 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffcb3332f48 CR3=000000000fc48000 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=2039353a37323a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a37323a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000