[ 34.984385] BUG: Bad rss-counter state mm:00000000ebd02e26 type:MM_FILEPAGES val:33 [ 34.985402] BUG: Bad rss-counter state mm:00000000ebd02e26 type:MM_ANONPAGES val:22 [ 35.150183] ================================================================== [ 35.151290] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.152395] Read of size 8 at addr ffff88801a8bb3f8 by task sshd/220 [ 35.153481] [ 35.153708] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.154572] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.155596] Call Trace: [ 35.155916] [ 35.156207] dump_stack_lvl+0x91/0xf0 [ 35.156699] print_report+0xcc/0x620 [ 35.157187] ? __virt_addr_valid+0x102/0x340 [ 35.157738] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.158362] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.158984] kasan_report+0xbe/0xf0 [ 35.159482] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.160112] vma_interval_tree_remove+0xc75/0xec0 [ 35.160711] vma_prepare+0xc54/0x11a0 [ 35.161198] __split_vma+0x5af/0x950 [ 35.161673] ? __pfx___split_vma+0x10/0x10 [ 35.162202] ? find_held_lock+0x2c/0x110 [ 35.162724] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.163309] ? lock_is_held_type+0x9f/0x120 [ 35.163853] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.164465] ? mtree_range_walk+0x632/0x900 [ 35.165014] ? mas_walk+0x5c7/0x7c0 [ 35.165490] do_vmi_munmap+0x1f1/0x2b0 [ 35.165983] mmap_region+0x1f9/0x2660 [ 35.166463] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.166977] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.167697] ? __pfx_lock_acquire+0x10/0x10 [ 35.168239] ? __pfx_mmap_region+0x10/0x10 [ 35.168769] ? security_mmap_addr+0x7d/0xa0 [ 35.169302] ? get_unmapped_area+0x1f5/0x3f0 [ 35.169857] do_mmap+0x854/0xf00 [ 35.170301] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.170806] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.171387] ksys_mmap_pgoff+0x3af/0x500 [ 35.171895] do_syscall_64+0x3f/0x90 [ 35.172374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.173029] RIP: 0033:0x7fd9e351fd82 [ 35.173486] 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 [ 35.175619] RSP: 002b:00007ffcb6e04ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.176526] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd9e351fd82 [ 35.177381] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd9e2959000 [ 35.178242] RBP: 00007fd9e2959000 R08: 0000000000000009 R09: 0000000000001000 [ 35.179095] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c98532aec0 [ 35.179941] R13: 00007ffcb6e04b00 R14: 00007ffcb6e04b30 R15: 00007ffcb6e04e90 [ 35.180801] [ 35.181096] [ 35.181309] Allocated by task 213: [ 35.181741] kasan_save_stack+0x22/0x50 [ 35.182251] kasan_set_track+0x25/0x30 [ 35.182742] __kasan_slab_alloc+0x59/0x70 [ 35.183280] kmem_cache_alloc+0x16b/0x370 [ 35.183803] vm_area_dup+0x20/0x160 [ 35.184259] __split_vma+0x170/0x950 [ 35.184729] split_vma+0xc6/0x110 [ 35.185175] mprotect_fixup+0x8d2/0xb30 [ 35.185683] do_mprotect_pkey+0x87e/0xd40 [ 35.186202] __x64_sys_mprotect+0x78/0xc0 [ 35.186725] do_syscall_64+0x3f/0x90 [ 35.187217] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.187866] [ 35.188082] Freed by task 204: [ 35.188473] kasan_save_stack+0x22/0x50 [ 35.188991] kasan_set_track+0x25/0x30 [ 35.189492] kasan_save_free_info+0x2b/0x50 [ 35.190021] __kasan_slab_free+0x10a/0x190 [ 35.190561] kmem_cache_free+0x10d/0x4d0 [ 35.191103] rcu_core+0x8c8/0x2860 [ 35.191554] __do_softirq+0x1b7/0x7d4 [ 35.192032] [ 35.192254] Last potentially related work creation: [ 35.192845] kasan_save_stack+0x22/0x50 [ 35.193347] __kasan_record_aux_stack+0x8e/0xa0 [ 35.193972] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.194630] remove_vma+0x139/0x170 [ 35.195097] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.195665] do_vmi_munmap+0x1f1/0x2b0 [ 35.196152] __vm_munmap+0x138/0x3a0 [ 35.196621] __x64_sys_munmap+0x59/0x80 [ 35.197117] do_syscall_64+0x3f/0x90 [ 35.197595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.198246] [ 35.198460] The buggy address belongs to the object at ffff88801a8bb3a0 [ 35.198460] which belongs to the cache vm_area_struct of size 168 [ 35.199946] The buggy address is located 88 bytes inside of [ 35.199946] freed 168-byte region [ffff88801a8bb3a0, ffff88801a8bb448) [ 35.201348] [ 35.201565] The buggy address belongs to the physical page: [ 35.202238] page:000000000759a6e0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a8bb [ 35.203352] memcg:ffff888009f40201 [ 35.203785] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.204430] page_type: 0xffffffff() [ 35.204883] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.205801] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009f40201 [ 35.206709] page dumped because: kasan: bad access detected [ 35.207380] [ 35.207594] Memory state around the buggy address: [ 35.208175] ffff88801a8bb280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 35.209025] ffff88801a8bb300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 35.209889] >ffff88801a8bb380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.210744] ^ [ 35.211596] ffff88801a8bb400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.212455] ffff88801a8bb480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.213318] ================================================================== [ 35.214286] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 37.265713] BUG: Bad rss-counter state mm:00000000dc17297f type:MM_FILEPAGES val:33 [ 37.267097] BUG: Bad rss-counter state mm:00000000dc17297f type:MM_ANONPAGES val:22 [ 37.740756] BUG: Bad rss-counter state mm:00000000121ac379 type:MM_FILEPAGES val:33 [ 37.741964] BUG: Bad rss-counter state mm:00000000121ac379 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34031' (ECDSA) to the list of known hosts. 2023/06/19 22:39:48 fuzzer started 2023/06/19 22:39:48 dialing manager at localhost:44161 2023/06/19 22:39:48 checking machine... 2023/06/19 22:39:48 checking revisions... [ 38.488431] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:39:48 testing simple program... [ 38.527484] cgroup: Unknown subsys name 'net' [ 38.580096] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:39:36 Registers: info registers vcpu 0 RAX=0000000000020d8a RBX=0000000000000001 RCX=ffffffff8180c521 RDX=0000000000000011 RSI=ffffffff86137508 RDI=ffffffff85dfc9fc RBP=ffff888008d7f9d0 RSP=ffff888008d7f8f8 R8 =ffffffff86137508 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000020d8a R12=ffff888008d7f9d8 R13=ffff888008d7f9c0 R14=ffff888008d7f9b9 R15=ffff888008d7f978 RIP=ffffffff8112fc12 RFL=00000206 [-----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 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=00007ffab28f0df0 CR3=0000000009a5e000 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=8ff59d2d42f50d99cc44ed2db27ff1a1 XMM02=2c67c8bc2e329bc3000000000011ee78 XMM03=fb795ef6d65770560000000000125160 XMM04=e564727063b7d13f00000000000ae988 XMM05=19e9129bd510f2350000000000134d18 XMM06=3b2fd2fe07bf911a0000000000133ef0 XMM07=e042d86d42eb936e0000000000125438 XMM08=50cd495128ba6db9000000000011eed8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=00000000ffffffff RCX=ffffffff81534376 RDX=00000000ffffffff RSI=000000000000002d RDI=ffff888010372000 RBP=ffff888010372000 RSP=ffff888008e57c70 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=ffff88806cf361c8 R13=ffffffff87b67200 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff8182d905 RFL=00000002 [-------] 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 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=00007ffe22de2000 CR3=0000000017438000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000