[ 23.864074] BUG: Bad rss-counter state mm:00000000a872db38 type:MM_FILEPAGES val:33 [ 23.864767] BUG: Bad rss-counter state mm:00000000a872db38 type:MM_ANONPAGES val:22 [ 24.022100] ================================================================== [ 24.023015] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.023951] Read of size 8 at addr ffff88800fcfa4e0 by task sshd/220 [ 24.024721] [ 24.024938] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.025965] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.026946] Call Trace: [ 24.027271] [ 24.027566] dump_stack_lvl+0x91/0xf0 [ 24.028072] print_report+0xcc/0x620 [ 24.028560] ? __virt_addr_valid+0x102/0x340 [ 24.029123] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.029744] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.030377] kasan_report+0xbe/0xf0 [ 24.030855] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.031471] vma_interval_tree_remove+0xc75/0xec0 [ 24.032075] vma_prepare+0xc54/0x11a0 [ 24.032553] __split_vma+0x5af/0x950 [ 24.033033] ? __pfx___split_vma+0x10/0x10 [ 24.033558] ? find_held_lock+0x2c/0x110 [ 24.034098] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.034664] ? lock_is_held_type+0x9f/0x120 [ 24.035213] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.035820] ? mtree_range_walk+0x632/0x900 [ 24.036388] ? mas_walk+0x5c7/0x7c0 [ 24.036875] do_vmi_munmap+0x1f1/0x2b0 [ 24.037370] mmap_region+0x1f9/0x2660 [ 24.037866] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.038385] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.039109] ? __pfx_lock_acquire+0x10/0x10 [ 24.039650] ? __pfx_mmap_region+0x10/0x10 [ 24.040197] ? security_mmap_addr+0x7d/0xa0 [ 24.040737] ? get_unmapped_area+0x1f5/0x3f0 [ 24.041296] do_mmap+0x854/0xf00 [ 24.041739] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.042273] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.042848] ksys_mmap_pgoff+0x3af/0x500 [ 24.043363] do_syscall_64+0x3f/0x90 [ 24.043843] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.044498] RIP: 0033:0x7f06470c6d82 [ 24.044957] 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 [ 24.047133] RSP: 002b:00007ffce875f268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.048066] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f06470c6d82 [ 24.048918] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0646500000 [ 24.049776] RBP: 00007f0646500000 R08: 0000000000000009 R09: 0000000000001000 [ 24.050640] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e423d53b20 [ 24.051498] R13: 00007ffce875f280 R14: 00007ffce875f2b0 R15: 00007ffce875f610 [ 24.052363] [ 24.052660] [ 24.052881] Allocated by task 213: [ 24.053321] kasan_save_stack+0x22/0x50 [ 24.053854] kasan_set_track+0x25/0x30 [ 24.054353] __kasan_slab_alloc+0x59/0x70 [ 24.054886] kmem_cache_alloc+0x16b/0x370 [ 24.055410] vm_area_dup+0x20/0x160 [ 24.055868] __split_vma+0x170/0x950 [ 24.056337] split_vma+0xc6/0x110 [ 24.056783] mprotect_fixup+0x8d2/0xb30 [ 24.057290] do_mprotect_pkey+0x87e/0xd40 [ 24.057834] __x64_sys_mprotect+0x78/0xc0 [ 24.058359] do_syscall_64+0x3f/0x90 [ 24.058838] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.059508] [ 24.059726] Freed by task 213: [ 24.060123] kasan_save_stack+0x22/0x50 [ 24.060629] kasan_set_track+0x25/0x30 [ 24.061130] kasan_save_free_info+0x2b/0x50 [ 24.061659] __kasan_slab_free+0x10a/0x190 [ 24.062209] kmem_cache_free+0x10d/0x4d0 [ 24.062715] rcu_core+0x8c8/0x2860 [ 24.063164] __do_softirq+0x1b7/0x7d4 [ 24.063645] [ 24.063858] Last potentially related work creation: [ 24.064451] kasan_save_stack+0x22/0x50 [ 24.064962] __kasan_record_aux_stack+0x8e/0xa0 [ 24.065544] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.066204] remove_vma+0x139/0x170 [ 24.066658] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.067228] do_vmi_munmap+0x1f1/0x2b0 [ 24.067718] __vm_munmap+0x138/0x3a0 [ 24.068196] __x64_sys_munmap+0x59/0x80 [ 24.068694] do_syscall_64+0x3f/0x90 [ 24.069178] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.069837] [ 24.070054] The buggy address belongs to the object at ffff88800fcfa488 [ 24.070054] which belongs to the cache vm_area_struct of size 168 [ 24.071521] The buggy address is located 88 bytes inside of [ 24.071521] freed 168-byte region [ffff88800fcfa488, ffff88800fcfa530) [ 24.072934] [ 24.073151] The buggy address belongs to the physical page: [ 24.073822] page:000000004bbc34de refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfcfa [ 24.074903] memcg:ffff88800fd06501 [ 24.075338] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.076042] page_type: 0xffffffff() [ 24.076497] raw: 0100000000000200 ffff8880087a0c80 ffffea00002742c0 dead000000000005 [ 24.077436] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd06501 [ 24.078349] page dumped because: kasan: bad access detected [ 24.079018] [ 24.079237] Memory state around the buggy address: [ 24.079824] ffff88800fcfa380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.080679] ffff88800fcfa400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 24.081536] >ffff88800fcfa480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.082415] ^ [ 24.083182] ffff88800fcfa500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 24.084059] ffff88800fcfa580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.084913] ================================================================== [ 24.086001] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.261340] BUG: Bad rss-counter state mm:000000004db95d21 type:MM_FILEPAGES val:33 [ 26.262381] BUG: Bad rss-counter state mm:000000004db95d21 type:MM_ANONPAGES val:22 [ 26.746081] BUG: Bad rss-counter state mm:00000000c9f151f8 type:MM_FILEPAGES val:33 [ 26.747005] BUG: Bad rss-counter state mm:00000000c9f151f8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13935' (ECDSA) to the list of known hosts. 2023/06/20 13:40:41 fuzzer started 2023/06/20 13:40:42 dialing manager at localhost:36067 2023/06/20 13:40:42 checking machine... 2023/06/20 13:40:42 checking revisions... [ 27.556684] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:40:42 testing simple program... [ 27.610368] cgroup: Unknown subsys name 'net' [ 27.650412] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:40:41 Registers: info registers vcpu 0 RAX=1ffff1100156531d RBX=ffff88800ab298b8 RCX=1ffff11001323fdc RDX=dffffc0000000000 RSI=ffff88800a0dcae8 RDI=ffff88800ab298e8 RBP=ffff88800991feb0 RSP=ffff88800fe476b8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800a0dca00 R13=0000000000000000 R14=ffff8880094ba3d8 R15=ffff8880094ba390 RIP=ffffffff8184767e 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 00007f11b3b71900 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=00007f11b4128618 CR3=000000000e87c000 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=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 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=00007fecdbdc79b0 CR3=000000001670e000 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=2031343a30343a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a30343a3331203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000