[ 23.999394] BUG: Bad rss-counter state mm:00000000423d61b6 type:MM_FILEPAGES val:33 [ 24.000559] BUG: Bad rss-counter state mm:00000000423d61b6 type:MM_ANONPAGES val:22 [ 24.126333] ================================================================== [ 24.127523] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.128462] Read of size 8 at addr ffff88800dd15310 by task sshd/219 [ 24.129284] [ 24.129485] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.130313] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.131244] Call Trace: [ 24.131544] [ 24.131809] dump_stack_lvl+0x91/0xf0 [ 24.132268] print_report+0xcc/0x620 [ 24.132661] ? __virt_addr_valid+0x102/0x340 [ 24.133084] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.133554] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.134038] kasan_report+0xbe/0xf0 [ 24.134402] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.134888] vma_interval_tree_remove+0xc75/0xec0 [ 24.135351] vma_prepare+0xc54/0x11a0 [ 24.135731] __split_vma+0x5af/0x950 [ 24.136097] ? __pfx___split_vma+0x10/0x10 [ 24.136503] ? find_held_lock+0x2c/0x110 [ 24.136922] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.137365] ? lock_is_held_type+0x9f/0x120 [ 24.137788] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.138263] ? mtree_range_walk+0x632/0x900 [ 24.138701] ? mas_walk+0x5c7/0x7c0 [ 24.139098] do_vmi_munmap+0x1f1/0x2b0 [ 24.139480] mmap_region+0x1f9/0x2660 [ 24.139854] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.140243] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.140771] ? __pfx_lock_acquire+0x10/0x10 [ 24.141175] ? __pfx_mmap_region+0x10/0x10 [ 24.141571] ? security_mmap_addr+0x7d/0xa0 [ 24.141965] ? get_unmapped_area+0x1f5/0x3f0 [ 24.142375] do_mmap+0x854/0xf00 [ 24.142708] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.143094] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.143506] ksys_mmap_pgoff+0x3af/0x500 [ 24.143886] do_syscall_64+0x3f/0x90 [ 24.144246] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.144725] RIP: 0033:0x7f84ad5b3d82 [ 24.145070] 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 [ 24.146663] RSP: 002b:00007ffe0a381a18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.147342] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f84ad5b3d82 [ 24.147977] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f84ac9ed000 [ 24.148602] RBP: 00007f84ac9ed000 R08: 0000000000000009 R09: 0000000000001000 [ 24.149229] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559697db0d90 [ 24.149862] R13: 00007ffe0a381a30 R14: 00007ffe0a381a60 R15: 00007ffe0a381dc0 [ 24.150497] [ 24.150714] [ 24.150885] Allocated by task 210: [ 24.151206] kasan_save_stack+0x22/0x50 [ 24.151581] kasan_set_track+0x25/0x30 [ 24.151945] __kasan_slab_alloc+0x59/0x70 [ 24.152333] kmem_cache_alloc+0x16b/0x370 [ 24.152717] vm_area_dup+0x20/0x160 [ 24.153053] __split_vma+0x170/0x950 [ 24.153404] split_vma+0xc6/0x110 [ 24.153733] mprotect_fixup+0x8d2/0xb30 [ 24.154111] do_mprotect_pkey+0x87e/0xd40 [ 24.154497] __x64_sys_mprotect+0x78/0xc0 [ 24.154882] do_syscall_64+0x3f/0x90 [ 24.155233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.155709] [ 24.155868] Freed by task 210: [ 24.156160] kasan_save_stack+0x22/0x50 [ 24.156530] kasan_set_track+0x25/0x30 [ 24.156897] kasan_save_free_info+0x2b/0x50 [ 24.157288] __kasan_slab_free+0x10a/0x190 [ 24.157680] kmem_cache_free+0x10d/0x4d0 [ 24.158056] rcu_core+0x8c8/0x2860 [ 24.158383] __do_softirq+0x1b7/0x7d4 [ 24.158740] [ 24.158902] Last potentially related work creation: [ 24.159334] kasan_save_stack+0x22/0x50 [ 24.159706] __kasan_record_aux_stack+0x8e/0xa0 [ 24.160109] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.160564] remove_vma+0x139/0x170 [ 24.160897] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.161314] do_vmi_munmap+0x1f1/0x2b0 [ 24.161669] __vm_munmap+0x138/0x3a0 [ 24.162014] __x64_sys_munmap+0x59/0x80 [ 24.162381] do_syscall_64+0x3f/0x90 [ 24.162728] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.163223] [ 24.163383] Second to last potentially related work creation: [ 24.163888] kasan_save_stack+0x22/0x50 [ 24.164255] __kasan_record_aux_stack+0x8e/0xa0 [ 24.164673] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.165146] remove_vma+0x139/0x170 [ 24.165475] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.165880] do_vmi_munmap+0x1f1/0x2b0 [ 24.166243] mmap_region+0x1f9/0x2660 [ 24.166592] do_mmap+0x854/0xf00 [ 24.166909] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.167273] ksys_mmap_pgoff+0x3af/0x500 [ 24.167640] do_syscall_64+0x3f/0x90 [ 24.167985] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.168456] [ 24.168612] The buggy address belongs to the object at ffff88800dd152b8 [ 24.168612] which belongs to the cache vm_area_struct of size 168 [ 24.169696] The buggy address is located 88 bytes inside of [ 24.169696] freed 168-byte region [ffff88800dd152b8, ffff88800dd15360) [ 24.170728] [ 24.170898] The buggy address belongs to the physical page: [ 24.171381] page:000000006cee22c5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd15 [ 24.172170] memcg:ffff88800d9ee101 [ 24.172486] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.172998] page_type: 0xffffffff() [ 24.173328] raw: 0100000000000200 ffff8880087a0c80 ffffea0000356640 dead000000000009 [ 24.173996] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d9ee101 [ 24.174664] page dumped because: kasan: bad access detected [ 24.175148] [ 24.175306] Memory state around the buggy address: [ 24.175734] ffff88800dd15200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 24.176368] ffff88800dd15280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.176993] >ffff88800dd15300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.177618] ^ [ 24.177962] ffff88800dd15380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.178598] ffff88800dd15400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 24.179230] ================================================================== [ 24.179935] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.635792] BUG: Bad rss-counter state mm:0000000063b38438 type:MM_FILEPAGES val:33 [ 26.636949] BUG: Bad rss-counter state mm:0000000063b38438 type:MM_ANONPAGES val:22 [ 27.128504] BUG: Bad rss-counter state mm:00000000fc319d55 type:MM_FILEPAGES val:33 [ 27.129657] BUG: Bad rss-counter state mm:00000000fc319d55 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8005' (ECDSA) to the list of known hosts. 2023/06/20 13:14:50 fuzzer started 2023/06/20 13:14:50 dialing manager at localhost:36067 2023/06/20 13:14:50 checking machine... 2023/06/20 13:14:50 checking revisions... [ 27.765309] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:14:50 testing simple program... [ 27.816358] cgroup: Unknown subsys name 'net' [ 27.852635] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:14:50 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000016a48 RCX=dffffc0000000000 RDX=ffffea00005a92c0 RSI=0000000000000004 RDI=ffffea00005a92f4 RBP=0000000000000000 RSP=ffff8880196a7870 R8 =0000000000000000 R9 =fffff940000b525e R10=ffffea00005a92f3 R11=0000000000040000 R12=0000000000000003 R13=ffffea00005a9208 R14=0000000000000000 R15=ffffea00005a9200 RIP=ffffffff8180fea0 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 00007fd64ffff700 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=00007ffe9f923a68 CR3=000000000eaf0000 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=2039343a34313a3331203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a34313a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110010fee28 RBX=ffff8880087f7120 RCX=dffffc0000000000 RDX=0000000000000000 RSI=0000000000000001 RDI=ffff8880087f71d8 RBP=0000000000000014 RSP=ffff8880102e7d50 R8 =0000000000000004 R9 =0000000000000014 R10=0000000000000040 R11=0000000000000000 R12=ffff8880087f70c0 R13=0000000000000040 R14=0000000000000000 R15=0000000000080000 RIP=ffffffff82169fa4 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 00007f529ba5f900 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=00007f29b7708650 CR3=000000000d8ee000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=95df1f55915f030100000000000ae988 XMM05=2037e95172188fba0000000000133638 XMM06=806171799158d9670000000000131e40 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000