[ 24.084266] BUG: Bad rss-counter state mm:00000000c4dd8840 type:MM_FILEPAGES val:33 [ 24.085598] BUG: Bad rss-counter state mm:00000000c4dd8840 type:MM_ANONPAGES val:22 [ 24.127425] ================================================================== [ 24.128456] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.129731] Read of size 8 at addr ffff88800c9f9b38 by task sshd/219 [ 24.130660] [ 24.130911] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.131937] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.133072] Call Trace: [ 24.133441] [ 24.133770] dump_stack_lvl+0x91/0xf0 [ 24.134337] print_report+0xcc/0x620 [ 24.134887] ? __virt_addr_valid+0x102/0x340 [ 24.135528] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.136228] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.136930] kasan_report+0xbe/0xf0 [ 24.137465] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.138191] vma_interval_tree_remove+0xc75/0xec0 [ 24.138886] vma_prepare+0xc54/0x11a0 [ 24.139450] __split_vma+0x5af/0x950 [ 24.139988] ? __pfx___split_vma+0x10/0x10 [ 24.140604] ? find_held_lock+0x2c/0x110 [ 24.141206] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.141867] ? lock_is_held_type+0x9f/0x120 [ 24.142495] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.143206] ? mtree_range_walk+0x632/0x900 [ 24.143862] ? mas_walk+0x5c7/0x7c0 [ 24.144401] do_vmi_munmap+0x1f1/0x2b0 [ 24.144967] mmap_region+0x1f9/0x2660 [ 24.145512] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.146092] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.146908] ? __pfx_lock_acquire+0x10/0x10 [ 24.147513] ? __pfx_mmap_region+0x10/0x10 [ 24.148116] ? security_mmap_addr+0x7d/0xa0 [ 24.148716] ? get_unmapped_area+0x1f5/0x3f0 [ 24.149339] do_mmap+0x854/0xf00 [ 24.149837] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.150402] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.151040] ksys_mmap_pgoff+0x3af/0x500 [ 24.151633] do_syscall_64+0x3f/0x90 [ 24.152179] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.152920] RIP: 0033:0x7f54755a2d82 [ 24.153445] 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 [ 24.155912] RSP: 002b:00007ffe63972ad8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.156950] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f54755a2d82 [ 24.157922] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f54749dc000 [ 24.158888] RBP: 00007f54749dc000 R08: 0000000000000009 R09: 0000000000001000 [ 24.159866] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d076b1bf70 [ 24.160852] R13: 00007ffe63972af0 R14: 00007ffe63972b20 R15: 00007ffe63972e80 [ 24.161837] [ 24.162169] [ 24.162411] Allocated by task 212: [ 24.162906] kasan_save_stack+0x22/0x50 [ 24.163491] kasan_set_track+0x25/0x30 [ 24.164059] __kasan_slab_alloc+0x59/0x70 [ 24.164658] kmem_cache_alloc+0x16b/0x370 [ 24.165251] vm_area_dup+0x20/0x160 [ 24.165766] __split_vma+0x170/0x950 [ 24.166296] split_vma+0xc6/0x110 [ 24.166792] mprotect_fixup+0x8d2/0xb30 [ 24.167366] do_mprotect_pkey+0x87e/0xd40 [ 24.167969] __x64_sys_mprotect+0x78/0xc0 [ 24.168653] do_syscall_64+0x3f/0x90 [ 24.169195] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.169931] [ 24.170185] Freed by task 212: [ 24.170644] kasan_save_stack+0x22/0x50 [ 24.171221] kasan_set_track+0x25/0x30 [ 24.171804] kasan_save_free_info+0x2b/0x50 [ 24.172405] __kasan_slab_free+0x10a/0x190 [ 24.173021] kmem_cache_free+0x10d/0x4d0 [ 24.173612] rcu_core+0x8c8/0x2860 [ 24.174132] __do_softirq+0x1b7/0x7d4 [ 24.174684] [ 24.174931] Last potentially related work creation: [ 24.175611] kasan_save_stack+0x22/0x50 [ 24.176195] __kasan_record_aux_stack+0x8e/0xa0 [ 24.176852] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.177581] remove_vma+0x139/0x170 [ 24.178101] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.178736] do_vmi_munmap+0x1f1/0x2b0 [ 24.179291] __vm_munmap+0x138/0x3a0 [ 24.179842] __x64_sys_munmap+0x59/0x80 [ 24.180410] do_syscall_64+0x3f/0x90 [ 24.180956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.181699] [ 24.181949] The buggy address belongs to the object at ffff88800c9f9ae0 [ 24.181949] which belongs to the cache vm_area_struct of size 168 [ 24.183645] The buggy address is located 88 bytes inside of [ 24.183645] freed 168-byte region [ffff88800c9f9ae0, ffff88800c9f9b88) [ 24.185256] [ 24.185503] The buggy address belongs to the physical page: [ 24.186291] page:00000000227b2d67 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9f9 [ 24.187552] memcg:ffff88800ea1b501 [ 24.188037] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.188833] page_type: 0xffffffff() [ 24.189346] raw: 0100000000000200 ffff8880087a0c80 ffffea000040c6c0 dead000000000005 [ 24.190411] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea1b501 [ 24.191472] page dumped because: kasan: bad access detected [ 24.192229] [ 24.192477] Memory state around the buggy address: [ 24.193155] ffff88800c9f9a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.194133] ffff88800c9f9a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 24.195134] >ffff88800c9f9b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.196116] ^ [ 24.196799] ffff88800c9f9b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 24.197765] ffff88800c9f9c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.198745] ================================================================== [ 24.199997] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.878218] BUG: Bad rss-counter state mm:00000000ef8e6ca8 type:MM_FILEPAGES val:33 [ 25.878890] BUG: Bad rss-counter state mm:00000000ef8e6ca8 type:MM_ANONPAGES val:22 [ 26.375976] BUG: Bad rss-counter state mm:00000000bbf1a52c type:MM_FILEPAGES val:33 [ 26.377180] BUG: Bad rss-counter state mm:00000000bbf1a52c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64204' (ECDSA) to the list of known hosts. 2023/06/20 22:44:27 fuzzer started 2023/06/20 22:44:27 dialing manager at localhost:36067 2023/06/20 22:44:27 checking machine... 2023/06/20 22:44:27 checking revisions... [ 27.014388] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:44:27 testing simple program... [ 27.061068] cgroup: Unknown subsys name 'net' [ 27.114775] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:44:27 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=0000000000000001 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=00007f1fbf629ea0 CR3=0000000005482000 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=00007fca5f748510000055e765658790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000038 RCX=ffffffff8217ba9b RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000000000 RSP=ffff88800fe8fba0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00007ffef5ad4f30 R13=ffff88800fe8fbf8 R14=ffff88800fe8fcf8 R15=ffff88800fe8fcd8 RIP=ffffffff814c0249 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 00007efe41209900 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=00007efe417c0618 CR3=0000000016da4000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000