[ 30.957042] BUG: Bad rss-counter state mm:00000000a356340a type:MM_FILEPAGES val:33 [ 30.958269] BUG: Bad rss-counter state mm:00000000a356340a type:MM_ANONPAGES val:22 [ 31.114940] ================================================================== [ 31.115864] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.116934] Read of size 8 at addr ffff888015a223f8 by task sshd/221 [ 31.117714] [ 31.117934] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.118838] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.119833] Call Trace: [ 31.120171] [ 31.120476] dump_stack_lvl+0x91/0xf0 [ 31.120974] print_report+0xcc/0x620 [ 31.121491] ? __virt_addr_valid+0x102/0x340 [ 31.122041] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.122678] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.123294] kasan_report+0xbe/0xf0 [ 31.123784] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.124455] vma_interval_tree_remove+0xc75/0xec0 [ 31.125092] vma_prepare+0xc54/0x11a0 [ 31.125617] __split_vma+0x5af/0x950 [ 31.126112] ? __pfx___split_vma+0x10/0x10 [ 31.126693] ? find_held_lock+0x2c/0x110 [ 31.127234] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.127845] ? lock_is_held_type+0x9f/0x120 [ 31.128421] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.129056] ? mtree_range_walk+0x632/0x900 [ 31.129649] ? mas_walk+0x5c7/0x7c0 [ 31.130146] do_vmi_munmap+0x1f1/0x2b0 [ 31.130695] mmap_region+0x1f9/0x2660 [ 31.131196] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.131738] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.132526] ? __pfx_lock_acquire+0x10/0x10 [ 31.133085] ? __pfx_mmap_region+0x10/0x10 [ 31.133655] ? security_mmap_addr+0x7d/0xa0 [ 31.134214] ? get_unmapped_area+0x1f5/0x3f0 [ 31.134822] do_mmap+0x854/0xf00 [ 31.135288] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.135847] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.136452] ksys_mmap_pgoff+0x3af/0x500 [ 31.136988] do_syscall_64+0x3f/0x90 [ 31.137502] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.138176] RIP: 0033:0x7fa9033d5d82 [ 31.138682] 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 [ 31.140993] RSP: 002b:00007ffcd180daf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.142074] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa9033d5d82 [ 31.142988] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa90280f000 [ 31.143917] RBP: 00007fa90280f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.144825] R10: 0000000000000812 R11: 0000000000000206 R12: 00005577c487dd90 [ 31.145736] R13: 00007ffcd180db10 R14: 00007ffcd180db40 R15: 00007ffcd180dea0 [ 31.146665] [ 31.146972] [ 31.147200] Allocated by task 213: [ 31.147687] kasan_save_stack+0x22/0x50 [ 31.148231] kasan_set_track+0x25/0x30 [ 31.148758] __kasan_slab_alloc+0x59/0x70 [ 31.149304] kmem_cache_alloc+0x16b/0x370 [ 31.149857] vm_area_dup+0x20/0x160 [ 31.150332] __split_vma+0x170/0x950 [ 31.150843] split_vma+0xc6/0x110 [ 31.151304] mprotect_fixup+0x8d2/0xb30 [ 31.151867] do_mprotect_pkey+0x87e/0xd40 [ 31.152423] __x64_sys_mprotect+0x78/0xc0 [ 31.152962] do_syscall_64+0x3f/0x90 [ 31.153470] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.154144] [ 31.154383] Freed by task 213: [ 31.154805] kasan_save_stack+0x22/0x50 [ 31.155334] kasan_set_track+0x25/0x30 [ 31.155865] kasan_save_free_info+0x2b/0x50 [ 31.156436] __kasan_slab_free+0x10a/0x190 [ 31.156992] kmem_cache_free+0x10d/0x4d0 [ 31.157611] rcu_core+0x8c8/0x2860 [ 31.158237] __do_softirq+0x1b7/0x7d4 [ 31.158784] [ 31.159007] Last potentially related work creation: [ 31.159633] kasan_save_stack+0x22/0x50 [ 31.160177] __kasan_record_aux_stack+0x8e/0xa0 [ 31.160787] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.161492] remove_vma+0x139/0x170 [ 31.161959] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.162565] do_vmi_munmap+0x1f1/0x2b0 [ 31.163081] __vm_munmap+0x138/0x3a0 [ 31.163584] __x64_sys_munmap+0x59/0x80 [ 31.164125] do_syscall_64+0x3f/0x90 [ 31.164637] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.165307] [ 31.165547] The buggy address belongs to the object at ffff888015a223a0 [ 31.165547] which belongs to the cache vm_area_struct of size 168 [ 31.167115] The buggy address is located 88 bytes inside of [ 31.167115] freed 168-byte region [ffff888015a223a0, ffff888015a22448) [ 31.168620] [ 31.168849] The buggy address belongs to the physical page: [ 31.169560] page:000000000eafd5c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a22 [ 31.170722] memcg:ffff88801416b801 [ 31.171177] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.171881] page_type: 0xffffffff() [ 31.172366] raw: 0100000000000200 ffff8880087a0c80 ffffea00003cb740 dead000000000004 [ 31.173328] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801416b801 [ 31.174284] page dumped because: kasan: bad access detected [ 31.175009] [ 31.175234] Memory state around the buggy address: [ 31.175872] ffff888015a22280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.176790] ffff888015a22300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.177695] >ffff888015a22380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.178633] ^ [ 31.179540] ffff888015a22400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.180471] ffff888015a22480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.181375] ================================================================== [ 31.182504] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.999291] BUG: Bad rss-counter state mm:00000000c368ad43 type:MM_FILEPAGES val:33 [ 33.000054] BUG: Bad rss-counter state mm:00000000c368ad43 type:MM_ANONPAGES val:22 [ 33.453603] BUG: Bad rss-counter state mm:00000000da111dd0 type:MM_FILEPAGES val:33 [ 33.454653] BUG: Bad rss-counter state mm:00000000da111dd0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45334' (ECDSA) to the list of known hosts. 2023/06/20 15:33:39 fuzzer started 2023/06/20 15:33:40 dialing manager at localhost:36067 2023/06/20 15:33:40 checking machine... 2023/06/20 15:33:40 checking revisions... [ 34.195660] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:33:40 testing simple program... [ 34.239585] cgroup: Unknown subsys name 'net' [ 34.295075] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:33:39 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffff88800c95d0d8 RCX=1ffffffff0ba7c91 RDX=0000000000000000 RSI=ffffffff817169fd RDI=ffff88800c95d0d8 RBP=00007ffc7503f000 RSP=ffff888016ba7d48 R8 =0000000000000004 R9 =0000000000000001 R10=000000000000010f R11=0000000000000000 R12=1ffff11002d74faa R13=ffff88800e3fd750 R14=ffff88800e3fd768 R15=ffff88800e3fd770 RIP=ffffffff812bc610 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9d12828900 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=00007ffc7503f000 CR3=00000000165b6000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=f8ac99c1ab7aaf368c6514aaf19cfa57 XMM05=00000000000000000000000000000000 XMM06=7373656363757336736514206873733d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fcc22c608e0 CR3=000000000c60a000 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=86dd4fe14759879dbc433233664fa71b XMM02=2c67c8bc2e329bc3000000000011b290 XMM03=fb795ef6d65770560000000000122058 XMM04=f5c4e386b3be4fb400000000000ae988 XMM05=e4cb8bb95a7664b60000000000131c80 XMM06=c291bd5c70af25b90000000000131b08 XMM07=e042d86d42eb936e0000000000122330 XMM08=84630e3812fd9c97000000000011b2f0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000