[ 23.928774] sshd (212) used greatest stack depth: 23992 bytes left [ 23.930584] BUG: Bad rss-counter state mm:000000003c7757ec type:MM_FILEPAGES val:33 [ 23.932442] BUG: Bad rss-counter state mm:000000003c7757ec type:MM_ANONPAGES val:22 [ 24.095877] ================================================================== [ 24.096824] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.097892] Read of size 8 at addr ffff88800e5ec140 by task sshd/219 [ 24.098664] [ 24.098886] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.099770] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.100757] Call Trace: [ 24.101080] [ 24.101360] dump_stack_lvl+0x91/0xf0 [ 24.101854] print_report+0xcc/0x620 [ 24.102340] ? __virt_addr_valid+0x102/0x340 [ 24.102886] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.103504] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.104120] kasan_report+0xbe/0xf0 [ 24.104615] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.105231] vma_interval_tree_remove+0xc75/0xec0 [ 24.105831] vma_prepare+0xc54/0x11a0 [ 24.106306] __split_vma+0x5af/0x950 [ 24.106769] ? __pfx___split_vma+0x10/0x10 [ 24.107293] ? find_held_lock+0x2c/0x110 [ 24.107811] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.108392] ? lock_is_held_type+0x9f/0x120 [ 24.108931] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.109532] ? mtree_range_walk+0x632/0x900 [ 24.110078] ? mas_walk+0x5c7/0x7c0 [ 24.110549] do_vmi_munmap+0x1f1/0x2b0 [ 24.111042] mmap_region+0x1f9/0x2660 [ 24.111519] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.112029] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.112748] ? __pfx_lock_acquire+0x10/0x10 [ 24.113285] ? __pfx_mmap_region+0x10/0x10 [ 24.113813] ? security_mmap_addr+0x7d/0xa0 [ 24.114339] ? get_unmapped_area+0x1f5/0x3f0 [ 24.114881] do_mmap+0x854/0xf00 [ 24.115316] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.115807] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.116378] ksys_mmap_pgoff+0x3af/0x500 [ 24.116886] do_syscall_64+0x3f/0x90 [ 24.117358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.117996] RIP: 0033:0x7f4b23fb8d82 [ 24.118452] 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 [ 24.120590] RSP: 002b:00007ffda903f308 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.121487] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4b23fb8d82 [ 24.122325] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4b233f2000 [ 24.123164] RBP: 00007f4b233f2000 R08: 0000000000000009 R09: 0000000000001000 [ 24.124010] R10: 0000000000000812 R11: 0000000000000206 R12: 00005571773e5ec0 [ 24.124866] R13: 00007ffda903f320 R14: 00007ffda903f350 R15: 00007ffda903f6b0 [ 24.125718] [ 24.126010] [ 24.126223] Allocated by task 212: [ 24.126651] kasan_save_stack+0x22/0x50 [ 24.127154] kasan_set_track+0x25/0x30 [ 24.127647] __kasan_slab_alloc+0x59/0x70 [ 24.128164] kmem_cache_alloc+0x16b/0x370 [ 24.128691] vm_area_dup+0x20/0x160 [ 24.129144] __split_vma+0x170/0x950 [ 24.129608] split_vma+0xc6/0x110 [ 24.130048] mprotect_fixup+0x8d2/0xb30 [ 24.130549] do_mprotect_pkey+0x87e/0xd40 [ 24.131073] __x64_sys_mprotect+0x78/0xc0 [ 24.131590] do_syscall_64+0x3f/0x90 [ 24.132063] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.132722] [ 24.132938] Freed by task 212: [ 24.133332] kasan_save_stack+0x22/0x50 [ 24.133831] kasan_set_track+0x25/0x30 [ 24.134325] kasan_save_free_info+0x2b/0x50 [ 24.134852] __kasan_slab_free+0x10a/0x190 [ 24.135379] kmem_cache_free+0x10d/0x4d0 [ 24.135890] rcu_core+0x8c8/0x2860 [ 24.136343] __do_softirq+0x1b7/0x7d4 [ 24.136823] [ 24.137036] Last potentially related work creation: [ 24.137625] kasan_save_stack+0x22/0x50 [ 24.138126] __kasan_record_aux_stack+0x8e/0xa0 [ 24.138704] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.139341] remove_vma+0x139/0x170 [ 24.139794] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.140366] do_vmi_munmap+0x1f1/0x2b0 [ 24.140848] __vm_munmap+0x138/0x3a0 [ 24.141309] __x64_sys_munmap+0x59/0x80 [ 24.141798] do_syscall_64+0x3f/0x90 [ 24.142273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.142908] [ 24.143123] Second to last potentially related work creation: [ 24.143810] kasan_save_stack+0x22/0x50 [ 24.144328] __kasan_record_aux_stack+0x8e/0xa0 [ 24.144906] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.145539] remove_vma+0x139/0x170 [ 24.145995] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.146554] do_vmi_munmap+0x1f1/0x2b0 [ 24.147043] mmap_region+0x1f9/0x2660 [ 24.147515] do_mmap+0x854/0xf00 [ 24.147942] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.148434] ksys_mmap_pgoff+0x3af/0x500 [ 24.148937] do_syscall_64+0x3f/0x90 [ 24.149414] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.150057] [ 24.150274] The buggy address belongs to the object at ffff88800e5ec0e8 [ 24.150274] which belongs to the cache vm_area_struct of size 168 [ 24.151735] The buggy address is located 88 bytes inside of [ 24.151735] freed 168-byte region [ffff88800e5ec0e8, ffff88800e5ec190) [ 24.153154] [ 24.153373] The buggy address belongs to the physical page: [ 24.154035] page:00000000df78891e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5ec [ 24.155120] memcg:ffff88800e57fe01 [ 24.155551] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.156204] page_type: 0xffffffff() [ 24.156667] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 24.157593] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e57fe01 [ 24.158493] page dumped because: kasan: bad access detected [ 24.159154] [ 24.159373] Memory state around the buggy address: [ 24.159957] ffff88800e5ec000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.160829] ffff88800e5ec080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 24.161671] >ffff88800e5ec100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.162524] ^ [ 24.163152] ffff88800e5ec180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 24.164006] ffff88800e5ec200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 24.164868] ================================================================== [ 24.165922] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.114858] BUG: Bad rss-counter state mm:000000006f6b4349 type:MM_FILEPAGES val:33 [ 26.116041] BUG: Bad rss-counter state mm:000000006f6b4349 type:MM_ANONPAGES val:22 [ 26.495299] BUG: Bad rss-counter state mm:00000000bb5e7362 type:MM_FILEPAGES val:33 [ 26.497015] BUG: Bad rss-counter state mm:00000000bb5e7362 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16419' (ECDSA) to the list of known hosts. 2023/06/20 13:27:41 fuzzer started 2023/06/20 13:27:41 dialing manager at localhost:36067 2023/06/20 13:27:41 checking machine... 2023/06/20 13:27:41 checking revisions... [ 27.185973] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:27:41 testing simple program... [ 27.241494] cgroup: Unknown subsys name 'net' [ 27.289864] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:27:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888014634800 RCX=0000000000000000 RDX=ffff8880167d0000 RSI=ffffffff8365522b RDI=ffff888014634800 RBP=0000000000000000 RSP=ffff888018007d30 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888014634898 R13=000000000000006e R14=ffff888014634800 R15=ffff888019bd4ac0 RIP=ffffffff814c089b 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 00007f8d6716f900 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=00007f8d67724650 CR3=000000000fe86000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a50 RCX=ffffffff860a1401 RDX=1ffff1100d9e1355 RSI=0000000000000000 RDI=ffffffff8451105e RBP=ffff88806cf09aa8 RSP=ffff88806cf09a38 R8 =ffffffff860a1444 R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000000792d R12=ffff88806cf09b18 R13=0000000000000000 R14=ffff8880101e51c0 R15=ffff88800d40fd80 RIP=ffffffff811303b2 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 00007fb559434900 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=00007fb55882a670 CR3=000000001450c000 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=8dae2d9e5b6653874e4ca1720ff8e425 XMM02=0000000000119b58d59e07bde36eea69 XMM03=0000000000119c80ec2efd57dc4c00df XMM04=34c8974c6e2e8c6600000000000ae988 XMM05=afa270d4f40e19f00000000000133070 XMM06=dfcdbad4f1609c370000000000131bb8 XMM07=fb795ef6d65770560000000000120b08 XMM08=2c67c8bc2e329bc30000000000119c80 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000