syzkaller login: [ 31.957385] BUG: Bad rss-counter state mm:0000000019df2d4e type:MM_FILEPAGES val:33 [ 31.958411] BUG: Bad rss-counter state mm:0000000019df2d4e type:MM_ANONPAGES val:22 [ 32.122747] ================================================================== [ 32.123664] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.124688] Read of size 8 at addr ffff88800dc6dc20 by task sshd/221 [ 32.125465] [ 32.125680] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.126559] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.127566] Call Trace: [ 32.127886] [ 32.128177] dump_stack_lvl+0x91/0xf0 [ 32.128681] print_report+0xcc/0x620 [ 32.129195] ? __virt_addr_valid+0x102/0x340 [ 32.129747] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.130366] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.130990] kasan_report+0xbe/0xf0 [ 32.131471] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.132117] vma_interval_tree_remove+0xc75/0xec0 [ 32.132732] vma_prepare+0xc54/0x11a0 [ 32.133223] __split_vma+0x5af/0x950 [ 32.133707] ? __pfx___split_vma+0x10/0x10 [ 32.134236] ? find_held_lock+0x2c/0x110 [ 32.134772] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.135345] ? lock_is_held_type+0x9f/0x120 [ 32.135898] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.136504] ? mtree_range_walk+0x632/0x900 [ 32.137063] ? mas_walk+0x5c7/0x7c0 [ 32.137543] do_vmi_munmap+0x1f1/0x2b0 [ 32.138037] mmap_region+0x1f9/0x2660 [ 32.138517] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.139041] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.139750] ? __pfx_lock_acquire+0x10/0x10 [ 32.140288] ? __pfx_mmap_region+0x10/0x10 [ 32.140820] ? security_mmap_addr+0x7d/0xa0 [ 32.141364] ? get_unmapped_area+0x1f5/0x3f0 [ 32.141917] do_mmap+0x854/0xf00 [ 32.142362] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.142855] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.143412] ksys_mmap_pgoff+0x3af/0x500 [ 32.143922] do_syscall_64+0x3f/0x90 [ 32.144403] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.145062] RIP: 0033:0x7f9fda75bd82 [ 32.145517] 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 [ 32.147637] RSP: 002b:00007ffda280c7d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.148555] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9fda75bd82 [ 32.149411] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9fd9b95000 [ 32.150262] RBP: 00007f9fd9b95000 R08: 0000000000000009 R09: 0000000000001000 [ 32.151104] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564c2f813ec0 [ 32.151949] R13: 00007ffda280c7f0 R14: 00007ffda280c820 R15: 00007ffda280cb80 [ 32.152808] [ 32.153117] [ 32.153336] Allocated by task 214: [ 32.153763] kasan_save_stack+0x22/0x50 [ 32.154266] kasan_set_track+0x25/0x30 [ 32.154761] __kasan_slab_alloc+0x59/0x70 [ 32.155290] kmem_cache_alloc+0x16b/0x370 [ 32.155809] vm_area_dup+0x20/0x160 [ 32.156269] __split_vma+0x170/0x950 [ 32.156738] split_vma+0xc6/0x110 [ 32.157205] mprotect_fixup+0x8d2/0xb30 [ 32.157710] do_mprotect_pkey+0x87e/0xd40 [ 32.158233] __x64_sys_mprotect+0x78/0xc0 [ 32.158761] do_syscall_64+0x3f/0x90 [ 32.159235] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.159883] [ 32.160100] Freed by task 13: [ 32.160488] kasan_save_stack+0x22/0x50 [ 32.160990] kasan_set_track+0x25/0x30 [ 32.161507] kasan_save_free_info+0x2b/0x50 [ 32.162046] __kasan_slab_free+0x10a/0x190 [ 32.162583] kmem_cache_free+0x10d/0x4d0 [ 32.163090] rcu_core+0x8c8/0x2860 [ 32.163545] __do_softirq+0x1b7/0x7d4 [ 32.164030] [ 32.164250] Last potentially related work creation: [ 32.164840] kasan_save_stack+0x22/0x50 [ 32.165358] __kasan_record_aux_stack+0x8e/0xa0 [ 32.165938] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.166591] remove_vma+0x139/0x170 [ 32.167047] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.167603] do_vmi_munmap+0x1f1/0x2b0 [ 32.168089] __vm_munmap+0x138/0x3a0 [ 32.168555] __x64_sys_munmap+0x59/0x80 [ 32.169065] do_syscall_64+0x3f/0x90 [ 32.169546] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.170196] [ 32.170414] Second to last potentially related work creation: [ 32.171087] kasan_save_stack+0x22/0x50 [ 32.171589] __kasan_record_aux_stack+0x8e/0xa0 [ 32.172160] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.172803] remove_vma+0x139/0x170 [ 32.173287] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.173847] do_vmi_munmap+0x1f1/0x2b0 [ 32.174334] mmap_region+0x1f9/0x2660 [ 32.174821] do_mmap+0x854/0xf00 [ 32.175261] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.175757] ksys_mmap_pgoff+0x3af/0x500 [ 32.176258] do_syscall_64+0x3f/0x90 [ 32.176732] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.177377] [ 32.177593] The buggy address belongs to the object at ffff88800dc6dbc8 [ 32.177593] which belongs to the cache vm_area_struct of size 168 [ 32.179057] The buggy address is located 88 bytes inside of [ 32.179057] freed 168-byte region [ffff88800dc6dbc8, ffff88800dc6dc70) [ 32.180446] [ 32.180664] The buggy address belongs to the physical page: [ 32.181332] page:00000000bf476c2a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc6d [ 32.182408] memcg:ffff88800d3df401 [ 32.182829] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.183473] page_type: 0xffffffff() [ 32.183918] raw: 0100000000000200 ffff88800879fc80 ffffea0000252e40 dead000000000008 [ 32.184840] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d3df401 [ 32.185754] page dumped because: kasan: bad access detected [ 32.186423] [ 32.186643] Memory state around the buggy address: [ 32.187220] ffff88800dc6db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.188074] ffff88800dc6db80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.188936] >ffff88800dc6dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.189795] ^ [ 32.190326] ffff88800dc6dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.191184] ffff88800dc6dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.192036] ================================================================== [ 32.193103] Disabling lock debugging due to kernel taint [ 34.141724] BUG: Bad rss-counter state mm:00000000ecb54ce2 type:MM_FILEPAGES val:33 [ 34.142636] BUG: Bad rss-counter state mm:00000000ecb54ce2 type:MM_ANONPAGES val:22 [ 34.615715] BUG: Bad rss-counter state mm:0000000050406824 type:MM_FILEPAGES val:33 [ 34.616870] BUG: Bad rss-counter state mm:0000000050406824 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10630' (ECDSA) to the list of known hosts. 2023/06/20 00:31:59 fuzzer started 2023/06/20 00:32:00 dialing manager at localhost:44161 2023/06/20 00:32:00 checking machine... 2023/06/20 00:32:00 checking revisions... [ 35.344243] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:32:00 testing simple program... [ 35.397125] cgroup: Unknown subsys name 'net' [ 35.460581] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:31:59 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fded610eec0 CR3=000000000d67e000 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=0dbf3b2f9a4bd09f9c4baa1ebc434796 XMM02=000000000011c698eff9b2d0a8fce9cb XMM03=000000000011c7682c67c8bc2e329bc3 XMM04=dffc5eb72e6a177d00000000000ae988 XMM05=fbfa2a433f31eebf0000000000135b80 XMM06=c291bd5c70af25b90000000000134970 XMM07=fb795ef6d65770560000000000123ba8 XMM08=2c67c8bc2e329bc3000000000011c708 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffffffff854ee9e8 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814822aa RDI=ffffffff854ee9ec RBP=0000000000000000 RSP=ffff88801427fdf8 R8 =0000000000000004 R9 =0000000000000000 R10=00000000fffffffe R11=0000000000000000 R12=0000000000000000 R13=0000000000000001 R14=dffffc0000000000 R15=00000000fffffffe 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 00007fc6b0fd5900 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=00007ffeca22b000 CR3=000000000d0e6000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000