[ 59.981070] BUG: Bad rss-counter state mm:000000004be369b9 type:MM_FILEPAGES val:33 [ 59.982593] BUG: Bad rss-counter state mm:000000004be369b9 type:MM_ANONPAGES val:22 [ 60.023300] ================================================================== [ 60.024282] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.025255] Read of size 8 at addr ffff88800c9ebdf0 by task sshd/218 [ 60.026194] [ 60.026418] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.027320] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.028366] Call Trace: [ 60.028703] [ 60.029004] dump_stack_lvl+0x91/0xf0 [ 60.029515] print_report+0xcc/0x620 [ 60.030018] ? __virt_addr_valid+0x102/0x340 [ 60.030594] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.031231] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.031874] kasan_report+0xbe/0xf0 [ 60.032381] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.033035] vma_interval_tree_remove+0xc75/0xec0 [ 60.033656] vma_prepare+0xc54/0x11a0 [ 60.034149] __split_vma+0x5af/0x950 [ 60.034639] ? __pfx___split_vma+0x10/0x10 [ 60.035200] ? find_held_lock+0x2c/0x110 [ 60.035736] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.036342] ? lock_is_held_type+0x9f/0x120 [ 60.036915] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.037548] ? mtree_range_walk+0x632/0x900 [ 60.038121] ? mas_walk+0x5c7/0x7c0 [ 60.038615] do_vmi_munmap+0x1f1/0x2b0 [ 60.039128] mmap_region+0x1f9/0x2660 [ 60.039628] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.040177] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.040910] ? __pfx_lock_acquire+0x10/0x10 [ 60.041469] ? __pfx_mmap_region+0x10/0x10 [ 60.042014] ? security_mmap_addr+0x7d/0xa0 [ 60.042575] ? get_unmapped_area+0x1f5/0x3f0 [ 60.043151] do_mmap+0x854/0xf00 [ 60.043615] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.044158] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.044738] ksys_mmap_pgoff+0x3af/0x500 [ 60.045269] do_syscall_64+0x3f/0x90 [ 60.045770] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.046446] RIP: 0033:0x7f5d8402dd82 [ 60.046918] 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 [ 60.049195] RSP: 002b:00007ffc3410e6f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.050170] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d8402dd82 [ 60.051082] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d83467000 [ 60.052003] RBP: 00007f5d83467000 R08: 0000000000000009 R09: 0000000000001000 [ 60.052924] R10: 0000000000000812 R11: 0000000000000206 R12: 000056376b8f7b20 [ 60.053851] R13: 00007ffc3410e710 R14: 00007ffc3410e740 R15: 00007ffc3410eaa0 [ 60.054776] [ 60.055092] [ 60.055320] Allocated by task 211: [ 60.055786] kasan_save_stack+0x22/0x50 [ 60.056344] kasan_set_track+0x25/0x30 [ 60.056873] __kasan_slab_alloc+0x59/0x70 [ 60.057437] kmem_cache_alloc+0x16b/0x370 [ 60.058003] vm_area_dup+0x20/0x160 [ 60.058493] __split_vma+0x170/0x950 [ 60.058996] split_vma+0xc6/0x110 [ 60.059493] mprotect_fixup+0x8d2/0xb30 [ 60.060186] do_mprotect_pkey+0x87e/0xd40 [ 60.060745] __x64_sys_mprotect+0x78/0xc0 [ 60.061309] do_syscall_64+0x3f/0x90 [ 60.061823] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.062522] [ 60.062750] Freed by task 211: [ 60.063173] kasan_save_stack+0x22/0x50 [ 60.063725] kasan_set_track+0x25/0x30 [ 60.064276] kasan_save_free_info+0x2b/0x50 [ 60.064853] __kasan_slab_free+0x10a/0x190 [ 60.065425] kmem_cache_free+0x10d/0x4d0 [ 60.065969] rcu_core+0x8c8/0x2860 [ 60.066460] __do_softirq+0x1b7/0x7d4 [ 60.066968] [ 60.067197] Last potentially related work creation: [ 60.067832] kasan_save_stack+0x22/0x50 [ 60.068388] __kasan_record_aux_stack+0x8e/0xa0 [ 60.069002] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.069709] remove_vma+0x139/0x170 [ 60.070204] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.070807] do_vmi_munmap+0x1f1/0x2b0 [ 60.071340] __vm_munmap+0x138/0x3a0 [ 60.071843] __x64_sys_munmap+0x59/0x80 [ 60.072391] do_syscall_64+0x3f/0x90 [ 60.072907] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.073604] [ 60.073833] Second to last potentially related work creation: [ 60.074582] kasan_save_stack+0x22/0x50 [ 60.075121] __kasan_record_aux_stack+0x8e/0xa0 [ 60.075745] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.076455] remove_vma+0x139/0x170 [ 60.076937] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.077530] do_vmi_munmap+0x1f1/0x2b0 [ 60.078057] mmap_region+0x1f9/0x2660 [ 60.078572] do_mmap+0x854/0xf00 [ 60.079030] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.079562] ksys_mmap_pgoff+0x3af/0x500 [ 60.080110] do_syscall_64+0x3f/0x90 [ 60.080627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.081302] [ 60.081520] The buggy address belongs to the object at ffff88800c9ebd98 [ 60.081520] which belongs to the cache vm_area_struct of size 168 [ 60.083008] The buggy address is located 88 bytes inside of [ 60.083008] freed 168-byte region [ffff88800c9ebd98, ffff88800c9ebe40) [ 60.084439] [ 60.084659] The buggy address belongs to the physical page: [ 60.085325] page:00000000bc3d7eb5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9eb [ 60.086419] memcg:ffff8880094d1b01 [ 60.086850] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 60.087553] page_type: 0xffffffff() [ 60.088032] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 60.088958] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880094d1b01 [ 60.089880] page dumped because: kasan: bad access detected [ 60.090546] [ 60.090760] Memory state around the buggy address: [ 60.091351] ffff88800c9ebc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 60.092227] ffff88800c9ebd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 60.093084] >ffff88800c9ebd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 60.093943] ^ [ 60.094761] ffff88800c9ebe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 60.095628] ffff88800c9ebe80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.096482] ================================================================== [ 60.097529] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 62.020045] BUG: Bad rss-counter state mm:00000000a720e9a0 type:MM_FILEPAGES val:33 [ 62.021409] BUG: Bad rss-counter state mm:00000000a720e9a0 type:MM_ANONPAGES val:22 [ 62.432131] BUG: Bad rss-counter state mm:000000006f3681f7 type:MM_FILEPAGES val:33 [ 62.433764] BUG: Bad rss-counter state mm:000000006f3681f7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10728' (ECDSA) to the list of known hosts. 2023/06/21 02:43:30 fuzzer started 2023/06/21 02:43:31 dialing manager at localhost:36067 2023/06/21 02:43:31 checking machine... 2023/06/21 02:43:31 checking revisions... [ 63.129623] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:43:31 testing simple program... [ 63.174631] cgroup: Unknown subsys name 'net' [ 63.210821] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:43:30 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f644a05ec10 CR3=000000000d802000 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=b2eb9a8ac5c5d2a13a46abc8ca07d86b XMM02=000000000011d368eff9b2d0a8fce9cb XMM03=000000000011d4382c67c8bc2e329bc3 XMM04=40850fe4e6f723ce00000000000ae988 XMM05=751b9502027dc0b90000000000131ef0 XMM06=b417e997d557401a0000000000130960 XMM07=e042d86d42eb936e00000000001212f0 XMM08=e1affc034e309b59000000000011d438 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf40140 RBX=ffffea000066bf08 RCX=ffff88806cf40140 RDX=1ffff1100d9e803e RSI=0000000000000006 RDI=ffffea00003b4c10 RBP=ffff88806cf401f0 RSP=ffff8880198bf3d0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000004 R13=ffffea00003b4c08 R14=dffffc0000000000 R15=ffff88807ffdc500 RIP=ffffffff8179307e 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 00007f93a6db1900 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=00007ffedaf8a000 CR3=0000000019f1e000 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=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