syzkaller login: [ 60.907109] BUG: Bad rss-counter state mm:000000001d11b0a4 type:MM_FILEPAGES val:33 [ 60.908649] BUG: Bad rss-counter state mm:000000001d11b0a4 type:MM_ANONPAGES val:22 [ 60.985333] ================================================================== [ 60.986230] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.987170] Read of size 8 at addr ffff88800ebf3140 by task sshd/226 [ 60.987941] [ 60.988157] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.989244] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.990220] Call Trace: [ 60.990546] [ 60.990835] dump_stack_lvl+0x91/0xf0 [ 60.991342] print_report+0xcc/0x620 [ 60.991843] ? __virt_addr_valid+0x102/0x340 [ 60.992392] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.993009] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.993629] kasan_report+0xbe/0xf0 [ 60.994102] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.994718] vma_interval_tree_remove+0xc75/0xec0 [ 60.995321] vma_prepare+0xc54/0x11a0 [ 60.995807] __split_vma+0x5af/0x950 [ 60.996282] ? __pfx___split_vma+0x10/0x10 [ 60.996809] ? find_held_lock+0x2c/0x110 [ 60.997333] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.997896] ? lock_is_held_type+0x9f/0x120 [ 60.998436] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.999047] ? mtree_range_walk+0x632/0x900 [ 60.999616] ? mas_walk+0x5c7/0x7c0 [ 61.000100] do_vmi_munmap+0x1f1/0x2b0 [ 61.000592] mmap_region+0x1f9/0x2660 [ 61.001077] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.001589] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.002302] ? __pfx_lock_acquire+0x10/0x10 [ 61.002843] ? __pfx_mmap_region+0x10/0x10 [ 61.003394] ? security_mmap_addr+0x7d/0xa0 [ 61.003947] ? get_unmapped_area+0x1f5/0x3f0 [ 61.004498] do_mmap+0x854/0xf00 [ 61.004941] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.005451] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.006017] ksys_mmap_pgoff+0x3af/0x500 [ 61.006527] do_syscall_64+0x3f/0x90 [ 61.007015] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.007676] RIP: 0033:0x7fb32b74ad82 [ 61.008147] 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 [ 61.010299] RSP: 002b:00007ffe4d8474e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.011210] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb32b74ad82 [ 61.012077] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb32ab84000 [ 61.012951] RBP: 00007fb32ab84000 R08: 0000000000000009 R09: 0000000000001000 [ 61.013842] R10: 0000000000000812 R11: 0000000000000206 R12: 000055947948ff60 [ 61.014730] R13: 00007ffe4d847500 R14: 00007ffe4d847530 R15: 00007ffe4d847890 [ 61.015639] [ 61.015942] [ 61.016165] Allocated by task 219: [ 61.016607] kasan_save_stack+0x22/0x50 [ 61.017135] kasan_set_track+0x25/0x30 [ 61.017647] __kasan_slab_alloc+0x59/0x70 [ 61.018189] kmem_cache_alloc+0x16b/0x370 [ 61.018733] vm_area_dup+0x20/0x160 [ 61.019201] __split_vma+0x170/0x950 [ 61.019696] split_vma+0xc6/0x110 [ 61.020150] mprotect_fixup+0x8d2/0xb30 [ 61.020672] do_mprotect_pkey+0x87e/0xd40 [ 61.021212] __x64_sys_mprotect+0x78/0xc0 [ 61.021753] do_syscall_64+0x3f/0x90 [ 61.022242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.022910] [ 61.023129] Freed by task 203: [ 61.023547] kasan_save_stack+0x22/0x50 [ 61.024067] kasan_set_track+0x25/0x30 [ 61.024574] kasan_save_free_info+0x2b/0x50 [ 61.025127] __kasan_slab_free+0x10a/0x190 [ 61.025686] kmem_cache_free+0x10d/0x4d0 [ 61.026210] rcu_core+0x8c8/0x2860 [ 61.026682] __do_softirq+0x1b7/0x7d4 [ 61.027180] [ 61.027400] Last potentially related work creation: [ 61.028024] kasan_save_stack+0x22/0x50 [ 61.028553] __kasan_record_aux_stack+0x8e/0xa0 [ 61.029146] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.029809] remove_vma+0x139/0x170 [ 61.030386] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.030959] do_vmi_munmap+0x1f1/0x2b0 [ 61.031486] __vm_munmap+0x138/0x3a0 [ 61.031979] __x64_sys_munmap+0x59/0x80 [ 61.032489] do_syscall_64+0x3f/0x90 [ 61.032980] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.033651] [ 61.033874] Second to last potentially related work creation: [ 61.034579] kasan_save_stack+0x22/0x50 [ 61.035098] __kasan_record_aux_stack+0x8e/0xa0 [ 61.035699] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.036363] remove_vma+0x139/0x170 [ 61.036830] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.037404] do_vmi_munmap+0x1f1/0x2b0 [ 61.037913] mmap_region+0x1f9/0x2660 [ 61.038401] do_mmap+0x854/0xf00 [ 61.038844] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.039346] ksys_mmap_pgoff+0x3af/0x500 [ 61.039881] do_syscall_64+0x3f/0x90 [ 61.040373] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.041037] [ 61.041258] The buggy address belongs to the object at ffff88800ebf30e8 [ 61.041258] which belongs to the cache vm_area_struct of size 168 [ 61.042791] The buggy address is located 88 bytes inside of [ 61.042791] freed 168-byte region [ffff88800ebf30e8, ffff88800ebf3190) [ 61.044286] [ 61.044510] The buggy address belongs to the physical page: [ 61.045185] page:0000000007093306 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebf3 [ 61.046274] memcg:ffff8880191ad501 [ 61.046711] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 61.047406] page_type: 0xffffffff() [ 61.047858] raw: 0100000000000200 ffff8880087a0c80 ffffea00003906c0 0000000000000003 [ 61.048778] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880191ad501 [ 61.049676] page dumped because: kasan: bad access detected [ 61.050342] [ 61.050555] Memory state around the buggy address: [ 61.051132] ffff88800ebf3000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.052005] ffff88800ebf3080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 61.052865] >ffff88800ebf3100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.053725] ^ [ 61.054363] ffff88800ebf3180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 61.055218] ffff88800ebf3200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 61.056074] ================================================================== [ 61.057015] Disabling lock debugging due to kernel taint [ 63.396779] BUG: Bad rss-counter state mm:00000000f9e34ac9 type:MM_FILEPAGES val:33 [ 63.397963] BUG: Bad rss-counter state mm:00000000f9e34ac9 type:MM_ANONPAGES val:22 [ 63.848191] BUG: Bad rss-counter state mm:000000000fea0f23 type:MM_FILEPAGES val:33 [ 63.849906] BUG: Bad rss-counter state mm:000000000fea0f23 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1426' (ECDSA) to the list of known hosts. 2023/06/20 21:47:20 fuzzer started 2023/06/20 21:47:20 dialing manager at localhost:36067 2023/06/20 21:47:20 checking machine... 2023/06/20 21:47:20 checking revisions... [ 64.575963] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:47:20 testing simple program... [ 64.621584] cgroup: Unknown subsys name 'net' [ 64.663565] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:47:19 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=1ffff1100fffb000 RSI=ffffffff81143243 RDI=0000000000000006 RBP=000000000de17000 RSP=ffff88800ee27848 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000800 R11=00676f6c2d766564 R12=ffff88807ffd8000 R13=ffff88807ffd8000 R14=0000000000000000 R15=ffff888019bdd280 RIP=ffffffff8114325d 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 00007fb9ab7d5700 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=00007febabbdd618 CR3=000000000ddc6000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a32313436352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323134 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=0000000000003c0d RBX=0000000000000002 RCX=ffffffff810bd032 RDX=0000000000003c14 RSI=0000000000000bd0 RDI=000000000000b43c RBP=ffff88806cf09af0 RSP=ffff88806cf099d8 R8 =ffffffff8608a556 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130859 RFL=00000293 [--S-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 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=00007fb4eb7696a0 CR3=000000000c73e000 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=0d2c07e6483b06aef8467f0ca95f9570 XMM02=000000000011c898eff9b2d0a8fce9cb XMM03=000000000011c9682c67c8bc2e329bc3 XMM04=eecec2e90dac496b00000000000ae988 XMM05=6860aeb314f8829d0000000000133a30 XMM06=1284cdee24a37bf00000000000132c08 XMM07=e042d86d42eb936e0000000000122e08 XMM08=ad82758b2df472ba000000000011c968 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000