[ 23.759334] BUG: Bad rss-counter state mm:000000008efef85f type:MM_FILEPAGES val:33 Debian GNU/Li[ 23.760336] BUG: Bad rss-counter state mm:000000008efef85f type:MM_ANONPAGES val:22 nux 11 syzkaller ttyS0 syzkaller login: [ 23.858382] ================================================================== [ 23.859317] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.860270] Read of size 8 at addr ffff88800df22228 by task sshd/221 [ 23.861035] [ 23.861352] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.862236] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.863234] Call Trace: [ 23.863570] [ 23.863861] dump_stack_lvl+0x91/0xf0 [ 23.864366] print_report+0xcc/0x620 [ 23.864851] ? __virt_addr_valid+0x102/0x340 [ 23.865414] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.866036] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.866666] kasan_report+0xbe/0xf0 [ 23.867138] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.867760] vma_interval_tree_remove+0xc75/0xec0 [ 23.868364] vma_prepare+0xc54/0x11a0 [ 23.868844] __split_vma+0x5af/0x950 [ 23.869316] ? __pfx___split_vma+0x10/0x10 [ 23.869846] ? find_held_lock+0x2c/0x110 [ 23.870384] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.870952] ? lock_is_held_type+0x9f/0x120 [ 23.871492] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.872098] ? mtree_range_walk+0x632/0x900 [ 23.872656] ? mas_walk+0x5c7/0x7c0 [ 23.873131] do_vmi_munmap+0x1f1/0x2b0 [ 23.873630] mmap_region+0x1f9/0x2660 [ 23.874117] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.874652] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.875375] ? __pfx_lock_acquire+0x10/0x10 [ 23.875909] ? __pfx_mmap_region+0x10/0x10 [ 23.876443] ? security_mmap_addr+0x7d/0xa0 [ 23.876987] ? get_unmapped_area+0x1f5/0x3f0 [ 23.877538] do_mmap+0x854/0xf00 [ 23.877978] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.878494] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.879058] ksys_mmap_pgoff+0x3af/0x500 [ 23.879575] do_syscall_64+0x3f/0x90 [ 23.880058] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.880702] RIP: 0033:0x7fc82ab24d82 [ 23.881160] 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 [ 23.883305] RSP: 002b:00007ffe9224cbd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.884203] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc82ab24d82 [ 23.885045] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc829f5e000 [ 23.885922] RBP: 00007fc829f5e000 R08: 0000000000000009 R09: 0000000000001000 [ 23.886869] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c2d67bdec0 [ 23.887795] R13: 00007ffe9224cbf0 R14: 00007ffe9224cc20 R15: 00007ffe9224cf80 [ 23.888668] [ 23.888964] [ 23.889186] Allocated by task 214: [ 23.889621] kasan_save_stack+0x22/0x50 [ 23.890145] kasan_set_track+0x25/0x30 [ 23.890669] __kasan_slab_alloc+0x59/0x70 [ 23.891256] kmem_cache_alloc+0x16b/0x370 [ 23.891802] vm_area_dup+0x20/0x160 [ 23.892299] __split_vma+0x170/0x950 [ 23.892803] split_vma+0xc6/0x110 [ 23.893285] mprotect_fixup+0x8d2/0xb30 [ 23.893852] do_mprotect_pkey+0x87e/0xd40 [ 23.894431] __x64_sys_mprotect+0x78/0xc0 [ 23.894970] do_syscall_64+0x3f/0x90 [ 23.895463] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.896131] [ 23.896356] Freed by task 214: [ 23.896757] kasan_save_stack+0x22/0x50 [ 23.897282] kasan_set_track+0x25/0x30 [ 23.897791] kasan_save_free_info+0x2b/0x50 [ 23.898362] __kasan_slab_free+0x10a/0x190 [ 23.898905] kmem_cache_free+0x10d/0x4d0 [ 23.899430] rcu_core+0x8c8/0x2860 [ 23.899889] __do_softirq+0x1b7/0x7d4 [ 23.900397] [ 23.900617] Last potentially related work creation: [ 23.901236] kasan_save_stack+0x22/0x50 [ 23.901758] __kasan_record_aux_stack+0x8e/0xa0 [ 23.902380] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.903134] remove_vma+0x139/0x170 [ 23.903595] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.904177] do_vmi_munmap+0x1f1/0x2b0 [ 23.904679] __vm_munmap+0x138/0x3a0 [ 23.905167] __x64_sys_munmap+0x59/0x80 [ 23.905686] do_syscall_64+0x3f/0x90 [ 23.906183] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.906869] [ 23.907088] The buggy address belongs to the object at ffff88800df221d0 [ 23.907088] which belongs to the cache vm_area_struct of size 168 [ 23.908612] The buggy address is located 88 bytes inside of [ 23.908612] freed 168-byte region [ffff88800df221d0, ffff88800df22278) [ 23.910093] [ 23.910341] The buggy address belongs to the physical page: [ 23.911028] page:000000006ef22f42 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf22 [ 23.912165] memcg:ffff88800f5d1901 [ 23.912610] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.913297] page_type: 0xffffffff() [ 23.913766] raw: 0100000000000200 ffff8880087a0c80 ffffea000037dcc0 dead000000000006 [ 23.914736] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f5d1901 [ 23.915688] page dumped because: kasan: bad access detected [ 23.916387] [ 23.916609] Memory state around the buggy address: [ 23.917216] ffff88800df22100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.918129] ffff88800df22180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 23.919025] >ffff88800df22200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 23.919917] ^ [ 23.920497] ffff88800df22280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 23.921404] ffff88800df22300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 23.922303] ================================================================== [ 23.923311] Disabling lock debugging due to kernel taint [ 25.789943] BUG: Bad rss-counter state mm:000000000c3a2647 type:MM_FILEPAGES val:33 [ 25.791067] BUG: Bad rss-counter state mm:000000000c3a2647 type:MM_ANONPAGES val:22 [ 26.385495] BUG: Bad rss-counter state mm:00000000f3ed5925 type:MM_FILEPAGES val:33 [ 26.386441] BUG: Bad rss-counter state mm:00000000f3ed5925 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62963' (ECDSA) to the list of known hosts. 2023/06/20 18:04:44 fuzzer started 2023/06/20 18:04:44 dialing manager at localhost:36067 2023/06/20 18:04:44 checking machine... 2023/06/20 18:04:44 checking revisions... [ 26.983072] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:04:44 testing simple program... [ 27.025105] cgroup: Unknown subsys name 'net' [ 27.069412] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:04:44 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000001 RSI=00000000000000fb RDI=0000000000000001 RBP=ffff88801a1af6a8 RSP=ffff88801a1af5e0 R8 =0000000000000001 R9 =ffffed1003435ec8 R10=ffff88801a1af647 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff8112993a RFL=00000002 [-------] 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 00007fdc5d418900 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=00007fdc5d9cd650 CR3=00000000160ec000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf39500 RBX=0000000000000000 RCX=ffff88806cf395dc RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888008d91c30 RBP=0000000000000000 RSP=ffff888008da7a78 R8 =0000000000003400 R9 =ffff88806cf3965c R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=0000000000000009 R14=dffffc0000000000 R15=ffff88806cf39fe8 RIP=ffffffff8126115c 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 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=00007f6c95ecd020 CR3=000000000c750000 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=7f271540c52ac185044db05295549fe6 XMM02=000000000011dc28eff9b2d0a8fce9cb XMM03=000000000011dcf82c67c8bc2e329bc3 XMM04=b2e26a6c716d6f6900000000000ae988 XMM05=d42fb70b41bc542900000000001328d0 XMM06=c291bd5c70af25b90000000000131600 XMM07=e042d86d42eb936e0000000000121c18 XMM08=4dd5a45de8f65c45000000000011dcf8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000