syzkaller login: [ 30.956463] BUG: Bad rss-counter state mm:000000006186ecb7 type:MM_FILEPAGES val:33 [ 30.957465] BUG: Bad rss-counter state mm:000000006186ecb7 type:MM_ANONPAGES val:22 [ 31.124972] ================================================================== [ 31.125858] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.126804] Read of size 8 at addr ffff888018f5dd08 by task sshd/221 [ 31.127571] [ 31.127788] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.128762] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.129739] Call Trace: [ 31.130089] [ 31.130399] dump_stack_lvl+0x91/0xf0 [ 31.130896] print_report+0xcc/0x620 [ 31.131382] ? __virt_addr_valid+0x102/0x340 [ 31.131939] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.132557] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.133172] kasan_report+0xbe/0xf0 [ 31.133642] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.134302] vma_interval_tree_remove+0xc75/0xec0 [ 31.134935] vma_prepare+0xc54/0x11a0 [ 31.135432] __split_vma+0x5af/0x950 [ 31.135923] ? __pfx___split_vma+0x10/0x10 [ 31.136475] ? find_held_lock+0x2c/0x110 [ 31.137019] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.137612] ? lock_is_held_type+0x9f/0x120 [ 31.138183] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.138818] ? mtree_range_walk+0x632/0x900 [ 31.139397] ? mas_walk+0x5c7/0x7c0 [ 31.139893] do_vmi_munmap+0x1f1/0x2b0 [ 31.140411] mmap_region+0x1f9/0x2660 [ 31.140919] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.141451] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.142222] ? __pfx_lock_acquire+0x10/0x10 [ 31.142780] ? __pfx_mmap_region+0x10/0x10 [ 31.143334] ? security_mmap_addr+0x7d/0xa0 [ 31.143888] ? get_unmapped_area+0x1f5/0x3f0 [ 31.144456] do_mmap+0x854/0xf00 [ 31.144914] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.145430] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.146024] ksys_mmap_pgoff+0x3af/0x500 [ 31.146552] do_syscall_64+0x3f/0x90 [ 31.147048] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.147726] RIP: 0033:0x7f4f8be99d82 [ 31.148205] 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 [ 31.150461] RSP: 002b:00007ffcb195ada8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.151412] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4f8be99d82 [ 31.152303] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4f8b2d3000 [ 31.153181] RBP: 00007f4f8b2d3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.154079] R10: 0000000000000812 R11: 0000000000000206 R12: 00005630b8648ec0 [ 31.154964] R13: 00007ffcb195adc0 R14: 00007ffcb195adf0 R15: 00007ffcb195b150 [ 31.155869] [ 31.156176] [ 31.156401] Allocated by task 214: [ 31.156844] kasan_save_stack+0x22/0x50 [ 31.157367] kasan_set_track+0x25/0x30 [ 31.157900] __kasan_slab_alloc+0x59/0x70 [ 31.158454] kmem_cache_alloc+0x16b/0x370 [ 31.158992] vm_area_dup+0x20/0x160 [ 31.159462] __split_vma+0x170/0x950 [ 31.159949] split_vma+0xc6/0x110 [ 31.160399] mprotect_fixup+0x8d2/0xb30 [ 31.160916] do_mprotect_pkey+0x87e/0xd40 [ 31.161456] __x64_sys_mprotect+0x78/0xc0 [ 31.162014] do_syscall_64+0x3f/0x90 [ 31.162503] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.163175] [ 31.163397] Freed by task 204: [ 31.163809] kasan_save_stack+0x22/0x50 [ 31.164407] kasan_set_track+0x25/0x30 [ 31.164949] kasan_save_free_info+0x2b/0x50 [ 31.165513] __kasan_slab_free+0x10a/0x190 [ 31.166149] kmem_cache_free+0x10d/0x4d0 [ 31.166677] rcu_core+0x8c8/0x2860 [ 31.167139] __do_softirq+0x1b7/0x7d4 [ 31.167630] [ 31.167855] Last potentially related work creation: [ 31.168466] kasan_save_stack+0x22/0x50 [ 31.168994] __kasan_record_aux_stack+0x8e/0xa0 [ 31.169584] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.170258] remove_vma+0x139/0x170 [ 31.170728] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.171309] do_vmi_munmap+0x1f1/0x2b0 [ 31.171820] __vm_munmap+0x138/0x3a0 [ 31.172311] __x64_sys_munmap+0x59/0x80 [ 31.172824] do_syscall_64+0x3f/0x90 [ 31.173321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.173997] [ 31.174223] The buggy address belongs to the object at ffff888018f5dcb0 [ 31.174223] which belongs to the cache vm_area_struct of size 168 [ 31.175757] The buggy address is located 88 bytes inside of [ 31.175757] freed 168-byte region [ffff888018f5dcb0, ffff888018f5dd58) [ 31.177223] [ 31.177447] The buggy address belongs to the physical page: [ 31.178153] page:000000002d170032 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f5d [ 31.179283] memcg:ffff888018e2bc01 [ 31.179726] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.180459] page_type: 0xffffffff() [ 31.180923] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c8640 dead000000000007 [ 31.181889] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018e2bc01 [ 31.182844] page dumped because: kasan: bad access detected [ 31.183532] [ 31.183751] Memory state around the buggy address: [ 31.184349] ffff888018f5dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.185240] ffff888018f5dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.186138] >ffff888018f5dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.187014] ^ [ 31.187468] ffff888018f5dd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.188354] ffff888018f5de00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.189235] ================================================================== [ 31.190264] Disabling lock debugging due to kernel taint [ 33.333906] BUG: Bad rss-counter state mm:00000000dcfcfa85 type:MM_FILEPAGES val:33 [ 33.334906] BUG: Bad rss-counter state mm:00000000dcfcfa85 type:MM_ANONPAGES val:22 [ 33.866023] BUG: Bad rss-counter state mm:000000009ceeb375 type:MM_FILEPAGES val:33 [ 33.867155] BUG: Bad rss-counter state mm:000000009ceeb375 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38008' (ECDSA) to the list of known hosts. 2023/06/20 22:33:27 fuzzer started 2023/06/20 22:33:27 dialing manager at localhost:36067 2023/06/20 22:33:27 checking machine... 2023/06/20 22:33:27 checking revisions... [ 34.500342] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:33:28 testing simple program... [ 34.544186] cgroup: Unknown subsys name 'net' [ 34.582975] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:33:27 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=00007fcd9a998670 CR3=0000000010122000 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=33333a3232203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343539 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=0000000000000001 RCX=ffffffff810bd032 RDX=0000000000000006 RSI=ffffffff8608a556 RDI=ffffffff85d899f8 RBP=ffffffff85d899f8 RSP=ffff888008e37850 R8 =ffffffff8608a556 R9 =ffff888008e37998 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d89a10 R13=ffffffff85d899f8 R14=ffffffff85d899f8 R15=dffffc0000000000 RIP=ffffffff8112fc68 RFL=00000216 [----AP-] 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=00007ffe371fe000 CR3=000000000ea16000 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