[ 24.248889] BUG: Bad rss-counter state mm:0000000050977ea8 type:MM_FILEPAGES val:33 [ 24.250491] BUG: Bad rss-counter state mm:0000000050977ea8 type:MM_ANONPAGES val:22 [ 24.410790] ================================================================== [ 24.411988] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.413355] Read of size 8 at addr ffff88800d538a50 by task sshd/218 [ 24.414273] [ 24.414532] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.415542] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.416723] Call Trace: [ 24.417098] [ 24.417433] dump_stack_lvl+0x91/0xf0 [ 24.418020] print_report+0xcc/0x620 [ 24.418606] ? __virt_addr_valid+0x102/0x340 [ 24.419264] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.419995] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.420724] kasan_report+0xbe/0xf0 [ 24.421193] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.421816] vma_interval_tree_remove+0xc75/0xec0 [ 24.422417] vma_prepare+0xc54/0x11a0 [ 24.422898] __split_vma+0x5af/0x950 [ 24.423367] ? __pfx___split_vma+0x10/0x10 [ 24.423895] ? find_held_lock+0x2c/0x110 [ 24.424424] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.424997] ? lock_is_held_type+0x9f/0x120 [ 24.425529] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.426129] ? mtree_range_walk+0x632/0x900 [ 24.426678] ? mas_walk+0x5c7/0x7c0 [ 24.427159] do_vmi_munmap+0x1f1/0x2b0 [ 24.427644] mmap_region+0x1f9/0x2660 [ 24.428130] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.428644] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.429352] ? __pfx_lock_acquire+0x10/0x10 [ 24.429887] ? __pfx_mmap_region+0x10/0x10 [ 24.430415] ? security_mmap_addr+0x7d/0xa0 [ 24.430946] ? get_unmapped_area+0x1f5/0x3f0 [ 24.431491] do_mmap+0x854/0xf00 [ 24.431936] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.432445] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.433007] ksys_mmap_pgoff+0x3af/0x500 [ 24.433508] do_syscall_64+0x3f/0x90 [ 24.433984] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.434629] RIP: 0033:0x7efe257f8d82 [ 24.435090] 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 [ 24.437204] RSP: 002b:00007ffc765aac08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.438108] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efe257f8d82 [ 24.438953] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efe24c32000 [ 24.439785] RBP: 00007efe24c32000 R08: 0000000000000009 R09: 0000000000001000 [ 24.440634] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560e2de18f60 [ 24.441480] R13: 00007ffc765aac20 R14: 00007ffc765aac50 R15: 00007ffc765aafb0 [ 24.442331] [ 24.442619] [ 24.442833] Allocated by task 211: [ 24.443262] kasan_save_stack+0x22/0x50 [ 24.443770] kasan_set_track+0x25/0x30 [ 24.444271] __kasan_slab_alloc+0x59/0x70 [ 24.444789] kmem_cache_alloc+0x16b/0x370 [ 24.445297] vm_area_dup+0x20/0x160 [ 24.445751] __split_vma+0x170/0x950 [ 24.446210] split_vma+0xc6/0x110 [ 24.446655] mprotect_fixup+0x8d2/0xb30 [ 24.447157] do_mprotect_pkey+0x87e/0xd40 [ 24.447671] __x64_sys_mprotect+0x78/0xc0 [ 24.448191] do_syscall_64+0x3f/0x90 [ 24.448662] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.449304] [ 24.449516] Freed by task 13: [ 24.449901] kasan_save_stack+0x22/0x50 [ 24.450409] kasan_set_track+0x25/0x30 [ 24.450898] kasan_save_free_info+0x2b/0x50 [ 24.451423] __kasan_slab_free+0x10a/0x190 [ 24.451949] kmem_cache_free+0x10d/0x4d0 [ 24.452471] rcu_core+0x8c8/0x2860 [ 24.452908] __do_softirq+0x1b7/0x7d4 [ 24.453377] [ 24.453591] Last potentially related work creation: [ 24.454173] kasan_save_stack+0x22/0x50 [ 24.454710] __kasan_record_aux_stack+0x8e/0xa0 [ 24.455283] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.455922] remove_vma+0x139/0x170 [ 24.456384] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.456934] do_vmi_munmap+0x1f1/0x2b0 [ 24.457414] __vm_munmap+0x138/0x3a0 [ 24.457875] __x64_sys_munmap+0x59/0x80 [ 24.458362] do_syscall_64+0x3f/0x90 [ 24.458833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.459470] [ 24.459685] Second to last potentially related work creation: [ 24.460373] kasan_save_stack+0x22/0x50 [ 24.460866] __kasan_record_aux_stack+0x8e/0xa0 [ 24.461431] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.462069] remove_vma+0x139/0x170 [ 24.462515] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.463069] do_vmi_munmap+0x1f1/0x2b0 [ 24.463547] mmap_region+0x1f9/0x2660 [ 24.464016] do_mmap+0x854/0xf00 [ 24.464453] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.464935] ksys_mmap_pgoff+0x3af/0x500 [ 24.465436] do_syscall_64+0x3f/0x90 [ 24.465911] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.466551] [ 24.466765] The buggy address belongs to the object at ffff88800d5389f8 [ 24.466765] which belongs to the cache vm_area_struct of size 168 [ 24.468238] The buggy address is located 88 bytes inside of [ 24.468238] freed 168-byte region [ffff88800d5389f8, ffff88800d538aa0) [ 24.469635] [ 24.469849] The buggy address belongs to the physical page: [ 24.470505] page:000000003814ca7f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd538 [ 24.471601] memcg:ffff88800dfbad01 [ 24.472036] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.472733] page_type: 0xffffffff() [ 24.473177] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 24.474091] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfbad01 [ 24.474982] page dumped because: kasan: bad access detected [ 24.475637] [ 24.475854] Memory state around the buggy address: [ 24.476430] ffff88800d538900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.477284] ffff88800d538980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 24.478136] >ffff88800d538a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.478979] ^ [ 24.479677] ffff88800d538a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 24.480538] ffff88800d538b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.481377] ================================================================== [ 24.482355] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.049023] BUG: Bad rss-counter state mm:000000006fe0c90f type:MM_FILEPAGES val:33 [ 27.050517] BUG: Bad rss-counter state mm:000000006fe0c90f type:MM_ANONPAGES val:22 [ 27.507086] BUG: Bad rss-counter state mm:000000001a612f93 type:MM_FILEPAGES val:33 [ 27.508080] BUG: Bad rss-counter state mm:000000001a612f93 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11446' (ECDSA) to the list of known hosts. 2023/06/21 10:42:18 fuzzer started 2023/06/21 10:42:18 dialing manager at localhost:36067 2023/06/21 10:42:18 checking machine... 2023/06/21 10:42:18 checking revisions... [ 28.253867] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:42:18 testing simple program... [ 28.303038] cgroup: Unknown subsys name 'net' [ 28.349971] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:42:18 Registers: info registers vcpu 0 RAX=ffffffff81b44ff0 RBX=0000000000000000 RCX=000000000000005a RDX=ffff888016960000 RSI=ffff888018e6e7e8 RDI=ffff88800f1e1180 RBP=000000000000005a RSP=ffff88801457fad0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=ffff888018e6e7e8 R14=ffffffff8493c440 R15=0000000000000b79 RIP=ffffffff81621a97 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 00007f0b9dac2700 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=00007fe4f3b86020 CR3=00000000100fe000 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=2038313a32343a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a32343a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000001 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff81810711 RSP=ffff8880090df758 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000200 R13=0000000000000001 R14=ffffffff8366b8df R15=0000000000000000 RIP=ffffffff812d14ae RFL=00000046 [---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 00007feaad7e1900 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=00007ffe77b83000 CR3=000000001646c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000