syzkaller login: [ 45.523898] BUG: Bad rss-counter state mm:00000000d5ac5176 type:MM_FILEPAGES val:33 [ 45.525922] BUG: Bad rss-counter state mm:00000000d5ac5176 type:MM_ANONPAGES val:22 [ 45.685410] ================================================================== [ 45.686330] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.687284] Read of size 8 at addr ffff88800e0d5310 by task sshd/221 [ 45.688063] [ 45.688283] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.689313] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.690304] Call Trace: [ 45.690625] [ 45.690942] dump_stack_lvl+0x91/0xf0 [ 45.691440] print_report+0xcc/0x620 [ 45.691953] ? __virt_addr_valid+0x102/0x340 [ 45.692522] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.693194] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.693844] kasan_report+0xbe/0xf0 [ 45.694340] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.695005] vma_interval_tree_remove+0xc75/0xec0 [ 45.695627] vma_prepare+0xc54/0x11a0 [ 45.696135] __split_vma+0x5af/0x950 [ 45.696633] ? __pfx___split_vma+0x10/0x10 [ 45.697181] ? find_held_lock+0x2c/0x110 [ 45.697724] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.698322] ? lock_is_held_type+0x9f/0x120 [ 45.698894] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.699537] ? mtree_range_walk+0x632/0x900 [ 45.700125] ? mas_walk+0x5c7/0x7c0 [ 45.700623] do_vmi_munmap+0x1f1/0x2b0 [ 45.701141] mmap_region+0x1f9/0x2660 [ 45.701649] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.702186] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.702959] ? __pfx_lock_acquire+0x10/0x10 [ 45.703518] ? __pfx_mmap_region+0x10/0x10 [ 45.704082] ? security_mmap_addr+0x7d/0xa0 [ 45.704654] ? get_unmapped_area+0x1f5/0x3f0 [ 45.705236] do_mmap+0x854/0xf00 [ 45.705692] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.706214] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.706816] ksys_mmap_pgoff+0x3af/0x500 [ 45.707360] do_syscall_64+0x3f/0x90 [ 45.707855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.708537] RIP: 0033:0x7f1aaffa0d82 [ 45.709021] 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 [ 45.711299] RSP: 002b:00007ffcbb6ef478 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.712260] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1aaffa0d82 [ 45.713149] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1aaf3da000 [ 45.714047] RBP: 00007f1aaf3da000 R08: 0000000000000009 R09: 0000000000001000 [ 45.714951] R10: 0000000000000812 R11: 0000000000000206 R12: 000055628514cec0 [ 45.715840] R13: 00007ffcbb6ef490 R14: 00007ffcbb6ef4c0 R15: 00007ffcbb6ef820 [ 45.716749] [ 45.717057] [ 45.717287] Allocated by task 213: [ 45.717741] kasan_save_stack+0x22/0x50 [ 45.718275] kasan_set_track+0x25/0x30 [ 45.718808] __kasan_slab_alloc+0x59/0x70 [ 45.719360] kmem_cache_alloc+0x16b/0x370 [ 45.719902] vm_area_dup+0x20/0x160 [ 45.720386] __split_vma+0x170/0x950 [ 45.720875] split_vma+0xc6/0x110 [ 45.721335] mprotect_fixup+0x8d2/0xb30 [ 45.721869] do_mprotect_pkey+0x87e/0xd40 [ 45.722418] __x64_sys_mprotect+0x78/0xc0 [ 45.722984] do_syscall_64+0x3f/0x90 [ 45.723482] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.724164] [ 45.724395] Freed by task 213: [ 45.724805] kasan_save_stack+0x22/0x50 [ 45.725337] kasan_set_track+0x25/0x30 [ 45.725865] kasan_save_free_info+0x2b/0x50 [ 45.726422] __kasan_slab_free+0x10a/0x190 [ 45.726997] kmem_cache_free+0x10d/0x4d0 [ 45.727532] rcu_core+0x8c8/0x2860 [ 45.727997] __do_softirq+0x1b7/0x7d4 [ 45.728493] [ 45.728717] Last potentially related work creation: [ 45.729346] kasan_save_stack+0x22/0x50 [ 45.729987] __kasan_record_aux_stack+0x8e/0xa0 [ 45.730601] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.731275] remove_vma+0x139/0x170 [ 45.731741] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.732315] do_vmi_munmap+0x1f1/0x2b0 [ 45.732814] __vm_munmap+0x138/0x3a0 [ 45.733287] __x64_sys_munmap+0x59/0x80 [ 45.733795] do_syscall_64+0x3f/0x90 [ 45.734282] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.734937] [ 45.735153] The buggy address belongs to the object at ffff88800e0d52b8 [ 45.735153] which belongs to the cache vm_area_struct of size 168 [ 45.736651] The buggy address is located 88 bytes inside of [ 45.736651] freed 168-byte region [ffff88800e0d52b8, ffff88800e0d5360) [ 45.738099] [ 45.738322] The buggy address belongs to the physical page: [ 45.739008] page:00000000f26a8e28 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0d5 [ 45.740116] memcg:ffff88800e1dae01 [ 45.740551] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.741201] page_type: 0xffffffff() [ 45.741664] raw: 0100000000000200 ffff88800879fc80 ffffea00003ed480 dead000000000002 [ 45.742599] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1dae01 [ 45.743537] page dumped because: kasan: bad access detected [ 45.744206] [ 45.744422] Memory state around the buggy address: [ 45.745028] ffff88800e0d5200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 45.745944] ffff88800e0d5280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 45.746858] >ffff88800e0d5300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 45.747761] ^ [ 45.748232] ffff88800e0d5380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 45.749140] ffff88800e0d5400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 45.750027] ================================================================== [ 45.751027] Disabling lock debugging due to kernel taint [ 47.901613] BUG: Bad rss-counter state mm:000000006a21f72b type:MM_FILEPAGES val:33 [ 47.902926] BUG: Bad rss-counter state mm:000000006a21f72b type:MM_ANONPAGES val:22 [ 48.422315] BUG: Bad rss-counter state mm:000000007546c6f3 type:MM_FILEPAGES val:33 [ 48.423524] BUG: Bad rss-counter state mm:000000007546c6f3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44972' (ECDSA) to the list of known hosts. 2023/06/20 02:20:17 fuzzer started 2023/06/20 02:20:17 dialing manager at localhost:44161 2023/06/20 02:20:17 checking machine... 2023/06/20 02:20:17 checking revisions... [ 49.180390] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:20:18 testing simple program... [ 49.215415] cgroup: Unknown subsys name 'net' [ 49.290831] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:20:00 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11000d454a7 RSI=ffffffff83c234ab RDI=ffff888006a2a538 RBP=ffff88800c6d1800 RSP=ffff888016c979b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800c6d1d10 R13=0000000000000000 R14=ffff88800c6d19b8 R15=ffff888006a2a500 RIP=ffffffff814c07eb 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 00007fdd3621a700 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=00007f1d84315b10 CR3=0000000015932000 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=3a5d3033325b646873732037313a3032 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343035 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=00000000f8540ebb RCX=ffffffff82178192 RDX=ffff88800ee49b40 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888019c6fca0 RSP=ffff888019c6fb70 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000003 R11=0000000000000000 R12=0000000000000003 R13=00000000d701cdb6 R14=00000000d701cdb6 R15=00000000d701cdb6 RIP=ffffffff814c07e4 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 00007fd6d0c0d900 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=00007fffefe26000 CR3=000000001a3ae000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000