[ 30.945922] BUG: Bad rss-counter state mm:000000004f173ba2 type:MM_FILEPAGES val:33 [ 30.947397] BUG: Bad rss-counter state mm:000000004f173ba2 type:MM_ANONPAGES val:22 [ 31.098909] ================================================================== [ 31.099820] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.100759] Read of size 8 at addr ffff88800dd10ed8 by task sshd/227 [ 31.101524] [ 31.101845] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.102707] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.103687] Call Trace: [ 31.104006] [ 31.104314] dump_stack_lvl+0x91/0xf0 [ 31.104808] print_report+0xcc/0x620 [ 31.105291] ? __virt_addr_valid+0x102/0x340 [ 31.105840] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.106455] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.107066] kasan_report+0xbe/0xf0 [ 31.107537] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.108159] vma_interval_tree_remove+0xc75/0xec0 [ 31.108757] vma_prepare+0xc54/0x11a0 [ 31.109238] __split_vma+0x5af/0x950 [ 31.109705] ? __pfx___split_vma+0x10/0x10 [ 31.110228] ? find_held_lock+0x2c/0x110 [ 31.110748] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.111304] ? lock_is_held_type+0x9f/0x120 [ 31.111839] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.112466] ? mtree_range_walk+0x632/0x900 [ 31.113015] ? mas_walk+0x5c7/0x7c0 [ 31.113495] do_vmi_munmap+0x1f1/0x2b0 [ 31.113999] mmap_region+0x1f9/0x2660 [ 31.114485] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.115000] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.115715] ? __pfx_lock_acquire+0x10/0x10 [ 31.116249] ? __pfx_mmap_region+0x10/0x10 [ 31.116783] ? security_mmap_addr+0x7d/0xa0 [ 31.117310] ? get_unmapped_area+0x1f5/0x3f0 [ 31.117872] do_mmap+0x854/0xf00 [ 31.118315] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.118805] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.119361] ksys_mmap_pgoff+0x3af/0x500 [ 31.119870] do_syscall_64+0x3f/0x90 [ 31.120361] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.121004] RIP: 0033:0x7fed6d14bd82 [ 31.121466] 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 [ 31.123580] RSP: 002b:00007ffcf6119b28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.124508] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fed6d14bd82 [ 31.125369] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fed6c585000 [ 31.126216] RBP: 00007fed6c585000 R08: 0000000000000009 R09: 0000000000001000 [ 31.127080] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d70bb66d90 [ 31.127928] R13: 00007ffcf6119b40 R14: 00007ffcf6119b70 R15: 00007ffcf6119ed0 [ 31.128792] [ 31.129083] [ 31.129296] Allocated by task 214: [ 31.129731] kasan_save_stack+0x22/0x50 [ 31.130232] kasan_set_track+0x25/0x30 [ 31.130727] __kasan_slab_alloc+0x59/0x70 [ 31.131254] kmem_cache_alloc+0x16b/0x370 [ 31.131771] vm_area_dup+0x20/0x160 [ 31.132237] __split_vma+0x170/0x950 [ 31.132700] split_vma+0xc6/0x110 [ 31.133146] mprotect_fixup+0x8d2/0xb30 [ 31.133644] do_mprotect_pkey+0x87e/0xd40 [ 31.134165] __x64_sys_mprotect+0x78/0xc0 [ 31.134684] do_syscall_64+0x3f/0x90 [ 31.135153] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.135794] [ 31.136007] Freed by task 214: [ 31.136403] kasan_save_stack+0x22/0x50 [ 31.136914] kasan_set_track+0x25/0x30 [ 31.137405] kasan_save_free_info+0x2b/0x50 [ 31.137940] __kasan_slab_free+0x10a/0x190 [ 31.138472] kmem_cache_free+0x10d/0x4d0 [ 31.138987] rcu_core+0x8c8/0x2860 [ 31.139434] __do_softirq+0x1b7/0x7d4 [ 31.139910] [ 31.140142] Last potentially related work creation: [ 31.140723] kasan_save_stack+0x22/0x50 [ 31.141224] __kasan_record_aux_stack+0x8e/0xa0 [ 31.141801] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.142445] remove_vma+0x139/0x170 [ 31.142900] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.143450] do_vmi_munmap+0x1f1/0x2b0 [ 31.143937] __vm_munmap+0x138/0x3a0 [ 31.144405] __x64_sys_munmap+0x59/0x80 [ 31.144900] do_syscall_64+0x3f/0x90 [ 31.145377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.146034] [ 31.146248] Second to last potentially related work creation: [ 31.146934] kasan_save_stack+0x22/0x50 [ 31.147435] __kasan_record_aux_stack+0x8e/0xa0 [ 31.148005] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.148661] remove_vma+0x139/0x170 [ 31.149113] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.149679] do_vmi_munmap+0x1f1/0x2b0 [ 31.150166] mmap_region+0x1f9/0x2660 [ 31.150640] do_mmap+0x854/0xf00 [ 31.151078] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.151573] ksys_mmap_pgoff+0x7d/0x500 [ 31.152069] do_syscall_64+0x3f/0x90 [ 31.152538] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.153177] [ 31.153395] The buggy address belongs to the object at ffff88800dd10e80 [ 31.153395] which belongs to the cache vm_area_struct of size 168 [ 31.154872] The buggy address is located 88 bytes inside of [ 31.154872] freed 168-byte region [ffff88800dd10e80, ffff88800dd10f28) [ 31.156272] [ 31.156485] The buggy address belongs to the physical page: [ 31.157149] page:0000000019855683 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd10 [ 31.158224] memcg:ffff88800f103201 [ 31.158657] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.159365] page_type: 0xffffffff() [ 31.159814] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.160763] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f103201 [ 31.161683] page dumped because: kasan: bad access detected [ 31.162333] [ 31.162547] Memory state around the buggy address: [ 31.163127] ffff88800dd10d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.163981] ffff88800dd10e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.164839] >ffff88800dd10e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.165686] ^ [ 31.166407] ffff88800dd10f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.167267] ffff88800dd10f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.168145] ================================================================== [ 31.169179] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.098849] BUG: Bad rss-counter state mm:00000000122dbfd7 type:MM_FILEPAGES val:33 [ 33.100133] BUG: Bad rss-counter state mm:00000000122dbfd7 type:MM_ANONPAGES val:22 [ 33.521506] BUG: Bad rss-counter state mm:00000000e0f4a13f type:MM_FILEPAGES val:33 [ 33.522329] BUG: Bad rss-counter state mm:00000000e0f4a13f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29437' (ECDSA) to the list of known hosts. 2023/06/20 11:40:11 fuzzer started 2023/06/20 11:40:11 dialing manager at localhost:36067 2023/06/20 11:40:11 checking machine... 2023/06/20 11:40:11 checking revisions... [ 34.242169] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:40:11 testing simple program... [ 34.297314] cgroup: Unknown subsys name 'net' [ 34.353991] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:40:11 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=1ffff11001d2555e RDX=1ffff11001d2556b RSI=0000000000000004 RDI=ffff88800e92ab60 RBP=0000000000000100 RSP=ffff88800ea27380 R8 =0000000000000001 R9 =ffffed1001d25568 R10=ffff88800e92ab43 R11=00000000000b6a61 R12=ffff88800ff59800 R13=0000000000000000 R14=ffff88800e92aaf8 R15=ffff88800e92aab0 RIP=ffffffff81847455 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 00007f238d1ed900 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=00007f238d1cc020 CR3=000000000e3f8000 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=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 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=00007f06ccc48e00 CR3=000000000c6aa000 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=b9629118e36b15839f4917be7ede05e0 XMM02=000000000011b940eff9b2d0a8fce9cb XMM03=000000000011ba102c67c8bc2e329bc3 XMM04=b3b982dc957e632800000000000ae988 XMM05=16bbfc4fa606b6250000000000132a50 XMM06=b25b9a65ed030d0c0000000000131c28 XMM07=e042d86d42eb936e0000000000121e38 XMM08=6f9b53befe3b9e1e000000000011ba10 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000