syzkaller login: [ 30.990893] BUG: Bad rss-counter state mm:0000000044fc339a type:MM_FILEPAGES val:33 [ 30.991911] BUG: Bad rss-counter state mm:0000000044fc339a type:MM_ANONPAGES val:22 [ 31.153778] ================================================================== [ 31.154752] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.155690] Read of size 8 at addr ffff8880099cf228 by task sshd/219 [ 31.156463] [ 31.156682] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.157607] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.158578] Call Trace: [ 31.158898] [ 31.159209] dump_stack_lvl+0x91/0xf0 [ 31.159731] print_report+0xcc/0x620 [ 31.160271] ? __virt_addr_valid+0x102/0x340 [ 31.160865] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.161491] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.162118] kasan_report+0xbe/0xf0 [ 31.162627] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.163240] vma_interval_tree_remove+0xc75/0xec0 [ 31.163908] vma_prepare+0xc54/0x11a0 [ 31.164409] __split_vma+0x5af/0x950 [ 31.164882] ? __pfx___split_vma+0x10/0x10 [ 31.165410] ? find_held_lock+0x2c/0x110 [ 31.165927] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.166538] ? lock_is_held_type+0x9f/0x120 [ 31.167077] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.167749] ? mtree_range_walk+0x632/0x900 [ 31.168300] ? mas_walk+0x5c7/0x7c0 [ 31.168807] do_vmi_munmap+0x1f1/0x2b0 [ 31.169311] mmap_region+0x1f9/0x2660 [ 31.169799] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.170337] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.171057] ? __pfx_lock_acquire+0x10/0x10 [ 31.171664] ? __pfx_mmap_region+0x10/0x10 [ 31.172194] ? security_mmap_addr+0x7d/0xa0 [ 31.172697] ? get_unmapped_area+0x1f5/0x3f0 [ 31.173228] do_mmap+0x854/0xf00 [ 31.173706] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.174329] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.175020] ksys_mmap_pgoff+0x3af/0x500 [ 31.175592] do_syscall_64+0x3f/0x90 [ 31.176117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.176829] RIP: 0033:0x7f85352b8d82 [ 31.177318] 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 [ 31.179529] RSP: 002b:00007ffcd44a7298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.180446] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f85352b8d82 [ 31.181300] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f85346f2000 [ 31.182241] RBP: 00007f85346f2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.183132] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563f6baadec0 [ 31.184068] R13: 00007ffcd44a72b0 R14: 00007ffcd44a72e0 R15: 00007ffcd44a7640 [ 31.185005] [ 31.185330] [ 31.185546] Allocated by task 212: [ 31.186092] kasan_save_stack+0x22/0x50 [ 31.186576] kasan_set_track+0x25/0x30 [ 31.187131] __kasan_slab_alloc+0x59/0x70 [ 31.187717] kmem_cache_alloc+0x16b/0x370 [ 31.188277] vm_area_dup+0x20/0x160 [ 31.188784] __split_vma+0x170/0x950 [ 31.189269] split_vma+0xc6/0x110 [ 31.189745] mprotect_fixup+0x8d2/0xb30 [ 31.190289] do_mprotect_pkey+0x87e/0xd40 [ 31.190821] __x64_sys_mprotect+0x78/0xc0 [ 31.191376] do_syscall_64+0x3f/0x90 [ 31.191870] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.192522] [ 31.192748] Freed by task 212: [ 31.193167] kasan_save_stack+0x22/0x50 [ 31.193648] kasan_set_track+0x25/0x30 [ 31.194159] kasan_save_free_info+0x2b/0x50 [ 31.194706] __kasan_slab_free+0x10a/0x190 [ 31.195266] kmem_cache_free+0x10d/0x4d0 [ 31.195824] rcu_core+0x8c8/0x2860 [ 31.196287] __do_softirq+0x1b7/0x7d4 [ 31.196781] [ 31.197013] Last potentially related work creation: [ 31.197612] kasan_save_stack+0x22/0x50 [ 31.198140] __kasan_record_aux_stack+0x8e/0xa0 [ 31.198755] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.199450] remove_vma+0x139/0x170 [ 31.199911] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.200504] do_vmi_munmap+0x1f1/0x2b0 [ 31.201012] __vm_munmap+0x138/0x3a0 [ 31.201497] __x64_sys_munmap+0x59/0x80 [ 31.202023] do_syscall_64+0x3f/0x90 [ 31.202517] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.203212] [ 31.203458] The buggy address belongs to the object at ffff8880099cf1d0 [ 31.203458] which belongs to the cache vm_area_struct of size 168 [ 31.205028] The buggy address is located 88 bytes inside of [ 31.205028] freed 168-byte region [ffff8880099cf1d0, ffff8880099cf278) [ 31.206495] [ 31.206720] The buggy address belongs to the physical page: [ 31.207436] page:00000000cd85b8e5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x99cf [ 31.208585] memcg:ffff88800c5f7c01 [ 31.209022] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.209669] page_type: 0xffffffff() [ 31.210130] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.211045] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5f7c01 [ 31.211977] page dumped because: kasan: bad access detected [ 31.212641] [ 31.212855] Memory state around the buggy address: [ 31.213463] ffff8880099cf100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.214341] ffff8880099cf180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.215214] >ffff8880099cf200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.216100] ^ [ 31.216652] ffff8880099cf280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.217532] ffff8880099cf300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.218395] ================================================================== [ 31.219604] Disabling lock debugging due to kernel taint [ 33.280047] BUG: Bad rss-counter state mm:0000000021c7c266 type:MM_FILEPAGES val:33 [ 33.281205] BUG: Bad rss-counter state mm:0000000021c7c266 type:MM_ANONPAGES val:22 [ 33.781974] BUG: Bad rss-counter state mm:0000000060570b6b type:MM_FILEPAGES val:33 [ 33.783128] BUG: Bad rss-counter state mm:0000000060570b6b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36262' (ECDSA) to the list of known hosts. 2023/06/20 18:00:16 fuzzer started 2023/06/20 18:00:17 dialing manager at localhost:36067 2023/06/20 18:00:17 checking machine... 2023/06/20 18:00:17 checking revisions... [ 34.471063] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:00:17 testing simple program... [ 34.526728] cgroup: Unknown subsys name 'net' [ 34.588076] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:00:16 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fff0238c3c8 CR3=0000000005482000 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=00007fd054441510000056267ad2a790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000004 RBX=ffffffff85fa4f4c RCX=ffffffff8363b5a6 RDX=0000000000000008 RSI=ffffffff863b353c RDI=ffffffff85fa4f3c RBP=ffffffff85fa4f3c RSP=ffff888016b978f0 R8 =ffffffff863b353c R9 =ffff888016b979e8 R10=0000000000038001 R11=000000000008a95e R12=ffffffff85fa4f5c R13=ffffffff85fa4f3c R14=ffffffff85fa4f3c R15=dffffc0000000000 RIP=ffffffff8112fc73 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 00007fd08ab1d900 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=00007fd08b0d4618 CR3=000000001035e000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000