[ 23.676437] BUG: Bad rss-counter state mm:00000000db35024a type:MM_FILEPAGES val:33 [ 23.677519] BUG: Bad rss-counter state mm:00000000db35024a type:MM_ANONPAGES val:22 [ 23.812780] ================================================================== [ 23.813725] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.814714] Read of size 8 at addr ffff8880097ec968 by task sshd/220 [ 23.815535] [ 23.815860] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.816778] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.817805] Call Trace: [ 23.818138] [ 23.818437] dump_stack_lvl+0x91/0xf0 [ 23.818965] print_report+0xcc/0x620 [ 23.819482] ? __virt_addr_valid+0x102/0x340 [ 23.820076] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.820746] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.821394] kasan_report+0xbe/0xf0 [ 23.821882] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.822524] vma_interval_tree_remove+0xc75/0xec0 [ 23.823159] vma_prepare+0xc54/0x11a0 [ 23.823661] __split_vma+0x5af/0x950 [ 23.824153] ? __pfx___split_vma+0x10/0x10 [ 23.824742] ? find_held_lock+0x2c/0x110 [ 23.825282] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.825883] ? lock_is_held_type+0x9f/0x120 [ 23.826455] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.827093] ? mtree_range_walk+0x632/0x900 [ 23.827663] ? mas_walk+0x5c7/0x7c0 [ 23.828157] do_vmi_munmap+0x1f1/0x2b0 [ 23.828683] mmap_region+0x1f9/0x2660 [ 23.829184] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.829722] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.830476] ? __pfx_lock_acquire+0x10/0x10 [ 23.831021] ? __pfx_mmap_region+0x10/0x10 [ 23.831582] ? security_mmap_addr+0x7d/0xa0 [ 23.832151] ? get_unmapped_area+0x1f5/0x3f0 [ 23.832748] do_mmap+0x854/0xf00 [ 23.833208] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.833733] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.834326] ksys_mmap_pgoff+0x3af/0x500 [ 23.834858] do_syscall_64+0x3f/0x90 [ 23.835370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.836051] RIP: 0033:0x7fdcc7e88d82 [ 23.836540] 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 [ 23.838839] RSP: 002b:00007ffebee8fbe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.839800] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdcc7e88d82 [ 23.840706] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdcc72c2000 [ 23.841570] RBP: 00007fdcc72c2000 R08: 0000000000000009 R09: 0000000000001000 [ 23.842409] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563ffdc42b20 [ 23.843263] R13: 00007ffebee8fc00 R14: 00007ffebee8fc30 R15: 00007ffebee8ff90 [ 23.844132] [ 23.844437] [ 23.844696] Allocated by task 213: [ 23.845126] kasan_save_stack+0x22/0x50 [ 23.845647] kasan_set_track+0x25/0x30 [ 23.846160] __kasan_slab_alloc+0x59/0x70 [ 23.846692] kmem_cache_alloc+0x16b/0x370 [ 23.847207] vm_area_dup+0x20/0x160 [ 23.847677] __split_vma+0x170/0x950 [ 23.848152] split_vma+0xc6/0x110 [ 23.848585] mprotect_fixup+0x8d2/0xb30 [ 23.849101] do_mprotect_pkey+0x87e/0xd40 [ 23.849624] __x64_sys_mprotect+0x78/0xc0 [ 23.850147] do_syscall_64+0x3f/0x90 [ 23.850628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.851272] [ 23.851492] Freed by task 213: [ 23.851879] kasan_save_stack+0x22/0x50 [ 23.852380] kasan_set_track+0x25/0x30 [ 23.852876] kasan_save_free_info+0x2b/0x50 [ 23.853405] __kasan_slab_free+0x10a/0x190 [ 23.853930] kmem_cache_free+0x10d/0x4d0 [ 23.854438] rcu_core+0x8c8/0x2860 [ 23.854876] __do_softirq+0x1b7/0x7d4 [ 23.855346] [ 23.855560] Last potentially related work creation: [ 23.856140] kasan_save_stack+0x22/0x50 [ 23.856656] __kasan_record_aux_stack+0x8e/0xa0 [ 23.857223] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.857863] remove_vma+0x139/0x170 [ 23.858308] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.858859] do_vmi_munmap+0x1f1/0x2b0 [ 23.859338] __vm_munmap+0x138/0x3a0 [ 23.859805] __x64_sys_munmap+0x59/0x80 [ 23.860293] do_syscall_64+0x3f/0x90 [ 23.860777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.861414] [ 23.861627] Second to last potentially related work creation: [ 23.862305] kasan_save_stack+0x22/0x50 [ 23.862804] __kasan_record_aux_stack+0x8e/0xa0 [ 23.863367] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.864004] remove_vma+0x139/0x170 [ 23.864452] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.865014] do_vmi_munmap+0x1f1/0x2b0 [ 23.865496] mmap_region+0x1f9/0x2660 [ 23.865972] do_mmap+0x854/0xf00 [ 23.866401] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.866884] ksys_mmap_pgoff+0x3af/0x500 [ 23.867384] do_syscall_64+0x3f/0x90 [ 23.867853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.868486] [ 23.868719] The buggy address belongs to the object at ffff8880097ec910 [ 23.868719] which belongs to the cache vm_area_struct of size 168 [ 23.870175] The buggy address is located 88 bytes inside of [ 23.870175] freed 168-byte region [ffff8880097ec910, ffff8880097ec9b8) [ 23.871561] [ 23.871774] The buggy address belongs to the physical page: [ 23.872427] page:0000000092e237d2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x97ec [ 23.873514] memcg:ffff88800ecfa901 [ 23.873935] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.874635] page_type: 0xffffffff() [ 23.875081] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 23.875992] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ecfa901 [ 23.876905] page dumped because: kasan: bad access detected [ 23.877558] [ 23.877771] Memory state around the buggy address: [ 23.878347] ffff8880097ec800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 23.879195] ffff8880097ec880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 23.880040] >ffff8880097ec900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.880888] ^ [ 23.881666] ffff8880097ec980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 23.882509] ffff8880097eca00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.883352] ================================================================== [ 23.884381] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.764538] BUG: Bad rss-counter state mm:00000000baa7dd1b type:MM_FILEPAGES val:33 [ 25.766183] BUG: Bad rss-counter state mm:00000000baa7dd1b type:MM_ANONPAGES val:22 [ 26.258603] BUG: Bad rss-counter state mm:000000003c0651b2 type:MM_FILEPAGES val:33 [ 26.259601] BUG: Bad rss-counter state mm:000000003c0651b2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42280' (ECDSA) to the list of known hosts. 2023/06/20 11:00:58 fuzzer started 2023/06/20 11:00:58 dialing manager at localhost:36067 2023/06/20 11:00:58 checking machine... 2023/06/20 11:00:58 checking revisions... [ 26.961971] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:00:58 testing simple program... [ 27.006681] cgroup: Unknown subsys name 'net' [ 27.085962] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:00:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff818bf073 RDX=ffff888016431b40 RSI=0000000000000000 RDI=0000000000000004 RBP=0000000000000000 RSP=ffff88800fdb7900 R8 =0000000000000004 R9 =0000000000000001 R10=0000000000000001 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88800fdb7b68 R14=0000000000000001 R15=ffff88800fdb7b98 RIP=ffffffff814c0864 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 00007f6366062900 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=00007ffc2867c000 CR3=000000000ca96000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 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=0000000000000001 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=00007f11f0ad80a0 CR3=000000000c758000 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=f1976b27a28f138ce741505a3e6e601c XMM02=000000000011c1e8ec2efd57dc4c00df XMM03=00000000001224d05a7107dee767ffc4 XMM04=f466910795c913a800000000000ae988 XMM05=19e9129bd510f2350000000000133340 XMM06=97e1b5910ca909d90000000000132518 XMM07=e042d86d42eb936e00000000001227a8 XMM08=5a7107dee767ffc4000000000011c248 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000