[ 23.690165] BUG: Bad rss-counter state mm:00000000e46ceb64 type:MM_FILEPAGES val:33 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 23.691301] BUG: Bad rss-counter state mm:00000000e46ceb64 type:MM_ANONPAGES val:22 [ 23.855555] ================================================================== [ 23.856496] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.857415] Read of size 8 at addr ffff88800d9ffc20 by task sshd/220 [ 23.858272] [ 23.858521] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.859362] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.860315] Call Trace: [ 23.860643] [ 23.860923] dump_stack_lvl+0x91/0xf0 [ 23.861403] print_report+0xcc/0x620 [ 23.861903] ? __virt_addr_valid+0x102/0x340 [ 23.862452] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.863057] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.863670] kasan_report+0xbe/0xf0 [ 23.864145] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.864758] vma_interval_tree_remove+0xc75/0xec0 [ 23.865349] vma_prepare+0xc54/0x11a0 [ 23.865822] __split_vma+0x5af/0x950 [ 23.866285] ? __pfx___split_vma+0x10/0x10 [ 23.866811] ? find_held_lock+0x2c/0x110 [ 23.867337] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.867892] ? lock_is_held_type+0x9f/0x120 [ 23.868425] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.869013] ? mtree_range_walk+0x632/0x900 [ 23.869570] ? mas_walk+0x5c7/0x7c0 [ 23.870041] do_vmi_munmap+0x1f1/0x2b0 [ 23.870527] mmap_region+0x1f9/0x2660 [ 23.871000] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.871508] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.872219] ? __pfx_lock_acquire+0x10/0x10 [ 23.872752] ? __pfx_mmap_region+0x10/0x10 [ 23.873269] ? security_mmap_addr+0x7d/0xa0 [ 23.873806] ? get_unmapped_area+0x1f5/0x3f0 [ 23.874348] do_mmap+0x854/0xf00 [ 23.874787] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.875279] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.875837] ksys_mmap_pgoff+0x3af/0x500 [ 23.876333] do_syscall_64+0x3f/0x90 [ 23.876806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.877450] RIP: 0033:0x7f3656b37d82 [ 23.877908] 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 [ 23.879983] RSP: 002b:00007ffd3e70ec98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.880877] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3656b37d82 [ 23.881710] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3655f71000 [ 23.882537] RBP: 00007f3655f71000 R08: 0000000000000009 R09: 0000000000001000 [ 23.883375] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555ab3966ec0 [ 23.884205] R13: 00007ffd3e70ecb0 R14: 00007ffd3e70ece0 R15: 00007ffd3e70f040 [ 23.885043] [ 23.885329] [ 23.885541] Allocated by task 213: [ 23.885991] kasan_save_stack+0x22/0x50 [ 23.886488] kasan_set_track+0x25/0x30 [ 23.886974] __kasan_slab_alloc+0x59/0x70 [ 23.887486] kmem_cache_alloc+0x16b/0x370 [ 23.887995] vm_area_dup+0x20/0x160 [ 23.888447] __split_vma+0x170/0x950 [ 23.888910] split_vma+0xc6/0x110 [ 23.889342] mprotect_fixup+0x8d2/0xb30 [ 23.889847] do_mprotect_pkey+0x87e/0xd40 [ 23.890360] __x64_sys_mprotect+0x78/0xc0 [ 23.890876] do_syscall_64+0x3f/0x90 [ 23.891340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.891974] [ 23.892186] Freed by task 213: [ 23.892570] kasan_save_stack+0x22/0x50 [ 23.893067] kasan_set_track+0x25/0x30 [ 23.893562] kasan_save_free_info+0x2b/0x50 [ 23.894088] __kasan_slab_free+0x10a/0x190 [ 23.894611] kmem_cache_free+0x10d/0x4d0 [ 23.895118] rcu_core+0x8c8/0x2860 [ 23.895557] __do_softirq+0x1b7/0x7d4 [ 23.896030] [ 23.896242] Last potentially related work creation: [ 23.896825] kasan_save_stack+0x22/0x50 [ 23.897320] __kasan_record_aux_stack+0x8e/0xa0 [ 23.897897] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.898527] remove_vma+0x139/0x170 [ 23.898969] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.899579] do_vmi_munmap+0x1f1/0x2b0 [ 23.900064] __vm_munmap+0x138/0x3a0 [ 23.900521] __x64_sys_munmap+0x59/0x80 [ 23.901006] do_syscall_64+0x3f/0x90 [ 23.901477] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.902123] [ 23.902340] Second to last potentially related work creation: [ 23.903008] kasan_save_stack+0x22/0x50 [ 23.903505] __kasan_record_aux_stack+0x8e/0xa0 [ 23.904067] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.904694] remove_vma+0x139/0x170 [ 23.905137] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.905702] do_vmi_munmap+0x1f1/0x2b0 [ 23.906187] mmap_region+0x1f9/0x2660 [ 23.906661] do_mmap+0x854/0xf00 [ 23.907087] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.907575] ksys_mmap_pgoff+0x7d/0x500 [ 23.908063] do_syscall_64+0x3f/0x90 [ 23.908528] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.909159] [ 23.909371] The buggy address belongs to the object at ffff88800d9ffbc8 [ 23.909371] which belongs to the cache vm_area_struct of size 168 [ 23.910824] The buggy address is located 88 bytes inside of [ 23.910824] freed 168-byte region [ffff88800d9ffbc8, ffff88800d9ffc70) [ 23.912208] [ 23.912421] The buggy address belongs to the physical page: [ 23.913071] page:000000002dfbc22c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd9ff [ 23.914153] memcg:ffff88800e057001 [ 23.914570] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.915208] page_type: 0xffffffff() [ 23.915652] raw: 0100000000000200 ffff8880087a0c80 ffffea000036ed00 dead000000000002 [ 23.916554] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e057001 [ 23.917445] page dumped because: kasan: bad access detected [ 23.918099] [ 23.918313] Memory state around the buggy address: [ 23.918881] ffff88800d9ffb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.919719] ffff88800d9ffb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 23.920562] >ffff88800d9ffc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 23.921390] ^ [ 23.921911] ffff88800d9ffc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 23.922747] ffff88800d9ffd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 23.923580] ================================================================== [ 23.924545] Disabling lock debugging due to kernel taint [ 25.911413] BUG: Bad rss-counter state mm:00000000db275a4e type:MM_FILEPAGES val:33 [ 25.912430] BUG: Bad rss-counter state mm:00000000db275a4e type:MM_ANONPAGES val:22 [ 26.368382] BUG: Bad rss-counter state mm:000000007bfa0433 type:MM_FILEPAGES val:33 [ 26.369380] BUG: Bad rss-counter state mm:000000007bfa0433 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11783' (ECDSA) to the list of known hosts. 2023/06/21 01:45:38 fuzzer started 2023/06/21 01:45:38 dialing manager at localhost:36067 2023/06/21 01:45:39 checking machine... 2023/06/21 01:45:39 checking revisions... [ 27.118931] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:45:39 testing simple program... [ 27.165339] cgroup: Unknown subsys name 'net' [ 27.213072] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:45:38 Registers: info registers vcpu 0 RAX=0000000080000201 RBX=0000000000000004 RCX=0000000080000201 RDX=0000000000000004 RSI=ffffffff82245f7d RDI=ffff88800939b500 RBP=0000000000000008 RSP=ffff88800c58f418 R8 =0000000000000004 R9 =0000000000000008 R10=0000000000000f78 R11=0000092300000923 R12=ffff88800939b500 R13=0000000000000008 R14=ffff88800c58f500 R15=0000000000000f78 RIP=ffffffff814c0871 RFL=00000202 [-------] 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 00007f5a72d0a900 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=00007f5a732c1618 CR3=000000000ea86000 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=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=00007f9dba144000 CR3=0000000014526000 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=63916f2cda9199b14e484c29a724ad4f XMM02=ec2efd57dc4c00df00000000001199b0 XMM03=bfb17a9f08483a690000000000119a80 XMM04=336fa52ca7193ba700000000000ae988 XMM05=19e9129bd510f2350000000000131420 XMM06=4fda316b135da52b00000000001312a8 XMM07=e042d86d42eb936e0000000000120720 XMM08=bfb17a9f08483a690000000000119a80 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000