[ 43.397724] BUG: Bad rss-counter state mm:000000002e737918 type:MM_FILEPAGES val:33 [ 43.398943] BUG: Bad rss-counter state mm:000000002e737918 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 43.541526] ================================================================== [ 43.542428] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.543359] Read of size 8 at addr ffff888019e35140 by task sshd/226 [ 43.544136] [ 43.544352] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.545310] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.546291] Call Trace: [ 43.546608] [ 43.546891] dump_stack_lvl+0x91/0xf0 [ 43.547544] print_report+0xcc/0x620 [ 43.548144] ? __virt_addr_valid+0x102/0x340 [ 43.548790] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.549514] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.550233] kasan_report+0xbe/0xf0 [ 43.550791] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.551519] vma_interval_tree_remove+0xc75/0xec0 [ 43.552245] vma_prepare+0xc54/0x11a0 [ 43.552810] __split_vma+0x5af/0x950 [ 43.553367] ? __pfx___split_vma+0x10/0x10 [ 43.553987] ? find_held_lock+0x2c/0x110 [ 43.554589] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.555248] ? lock_is_held_type+0x9f/0x120 [ 43.555907] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.556615] ? mtree_range_walk+0x632/0x900 [ 43.557164] ? mas_walk+0x5c7/0x7c0 [ 43.557633] do_vmi_munmap+0x1f1/0x2b0 [ 43.558127] mmap_region+0x1f9/0x2660 [ 43.558602] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.559115] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.559832] ? __pfx_lock_acquire+0x10/0x10 [ 43.560360] ? __pfx_mmap_region+0x10/0x10 [ 43.560896] ? security_mmap_addr+0x7d/0xa0 [ 43.561455] ? get_unmapped_area+0x1f5/0x3f0 [ 43.562018] do_mmap+0x854/0xf00 [ 43.562454] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.562957] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.563525] ksys_mmap_pgoff+0x3af/0x500 [ 43.564057] do_syscall_64+0x3f/0x90 [ 43.564538] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.565188] RIP: 0033:0x7f2a88538d82 [ 43.565663] 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 [ 43.567804] RSP: 002b:00007ffcd0443238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.568719] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2a88538d82 [ 43.569574] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2a87972000 [ 43.570427] RBP: 00007f2a87972000 R08: 0000000000000009 R09: 0000000000001000 [ 43.571306] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cd5d387ec0 [ 43.572208] R13: 00007ffcd0443250 R14: 00007ffcd0443280 R15: 00007ffcd04435e0 [ 43.573120] [ 43.573428] [ 43.573650] Allocated by task 219: [ 43.574092] kasan_save_stack+0x22/0x50 [ 43.574617] kasan_set_track+0x25/0x30 [ 43.575134] __kasan_slab_alloc+0x59/0x70 [ 43.575689] kmem_cache_alloc+0x16b/0x370 [ 43.576233] vm_area_dup+0x20/0x160 [ 43.576705] __split_vma+0x170/0x950 [ 43.577186] split_vma+0xc6/0x110 [ 43.577650] mprotect_fixup+0x8d2/0xb30 [ 43.578175] do_mprotect_pkey+0x87e/0xd40 [ 43.578720] __x64_sys_mprotect+0x78/0xc0 [ 43.579264] do_syscall_64+0x3f/0x90 [ 43.579768] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.580435] [ 43.580660] Freed by task 219: [ 43.581081] kasan_save_stack+0x22/0x50 [ 43.581621] kasan_set_track+0x25/0x30 [ 43.582134] kasan_save_free_info+0x2b/0x50 [ 43.582687] __kasan_slab_free+0x10a/0x190 [ 43.583240] kmem_cache_free+0x10d/0x4d0 [ 43.583795] rcu_core+0x8c8/0x2860 [ 43.584258] __do_softirq+0x1b7/0x7d4 [ 43.584755] [ 43.584978] Last potentially related work creation: [ 43.585597] kasan_save_stack+0x22/0x50 [ 43.586115] __kasan_record_aux_stack+0x8e/0xa0 [ 43.586719] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.587395] remove_vma+0x139/0x170 [ 43.587876] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.588462] do_vmi_munmap+0x1f1/0x2b0 [ 43.588969] __vm_munmap+0x138/0x3a0 [ 43.589458] __x64_sys_munmap+0x59/0x80 [ 43.589977] do_syscall_64+0x3f/0x90 [ 43.590468] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.591132] [ 43.591353] The buggy address belongs to the object at ffff888019e350e8 [ 43.591353] which belongs to the cache vm_area_struct of size 168 [ 43.592923] The buggy address is located 88 bytes inside of [ 43.592923] freed 168-byte region [ffff888019e350e8, ffff888019e35190) [ 43.594390] [ 43.594618] The buggy address belongs to the physical page: [ 43.595309] page:000000004333b57b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e35 [ 43.596485] memcg:ffff888019e74401 [ 43.596925] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.597561] page_type: 0xffffffff() [ 43.598010] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 43.598920] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e74401 [ 43.599825] page dumped because: kasan: bad access detected [ 43.600479] [ 43.600691] Memory state around the buggy address: [ 43.601268] ffff888019e35000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.602151] ffff888019e35080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 43.603046] >ffff888019e35100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.603950] ^ [ 43.604580] ffff888019e35180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 43.605439] ffff888019e35200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 43.606284] ================================================================== [ 43.607268] Disabling lock debugging due to kernel taint [ 45.846089] BUG: Bad rss-counter state mm:00000000910af9b6 type:MM_FILEPAGES val:33 [ 45.847342] BUG: Bad rss-counter state mm:00000000910af9b6 type:MM_ANONPAGES val:22 [ 46.391586] BUG: Bad rss-counter state mm:00000000ee1a8d99 type:MM_FILEPAGES val:33 [ 46.392625] BUG: Bad rss-counter state mm:00000000ee1a8d99 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62522' (ECDSA) to the list of known hosts. 2023/06/20 07:57:52 fuzzer started 2023/06/20 07:57:53 dialing manager at localhost:44161 2023/06/20 07:57:53 checking machine... 2023/06/20 07:57:53 checking revisions... [ 47.029440] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:57:53 testing simple program... [ 47.075732] cgroup: Unknown subsys name 'net' [ 47.124732] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:57:39 Registers: info registers vcpu 0 RAX=a830bd982a87e300 RBX=ffffffff85d3d010 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffed1003a00f6b RSP=ffff88801d007b48 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff856cd420 R13=ffffffff81787baa R14=0000000000000001 R15=ffffffff818470dc RIP=ffffffff812d89f4 RFL=00000282 [--S----] 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 00007f9de13dd900 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=00007f9de19950b0 CR3=000000000ec22000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f48c262e988 CR3=000000000d95a000 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=90b0a9564cc9a185c6420ee14e96abc5 XMM02=ec2efd57dc4c00df000000000011fc30 XMM03=14b741f7da7dde6a000000000011fd00 XMM04=ed4d35285b71f2ce00000000000ae988 XMM05=6860aeb314f8829d0000000000134828 XMM06=c0c9b54d4388f2650000000000133a00 XMM07=e042d86d42eb936e0000000000125278 XMM08=14b741f7da7dde6a000000000011fd00 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000