[ 23.834377] BUG: Bad rss-counter state mm:00000000299e1795 type:MM_FILEPAGES val:33 [ 23.835027] BUG: Bad rss-counter state mm:00000000299e1795 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 23.865463] ================================================================== [ 23.866079] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.866759] Read of size 8 at addr ffff8880180d46b0 by task sshd/221 [ 23.867383] [ 23.867531] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.868118] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.868779] Call Trace: [ 23.868997] [ 23.869189] dump_stack_lvl+0x91/0xf0 [ 23.869510] print_report+0xcc/0x620 [ 23.869854] ? __virt_addr_valid+0x102/0x340 [ 23.870221] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.870644] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.871062] kasan_report+0xbe/0xf0 [ 23.871382] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.871801] vma_interval_tree_remove+0xc75/0xec0 [ 23.872208] vma_prepare+0xc54/0x11a0 [ 23.872536] __split_vma+0x5af/0x950 [ 23.872858] ? __pfx___split_vma+0x10/0x10 [ 23.873204] ? find_held_lock+0x2c/0x110 [ 23.873555] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.873943] ? lock_is_held_type+0x9f/0x120 [ 23.874302] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.874701] ? mtree_range_walk+0x632/0x900 [ 23.875064] ? mas_walk+0x5c7/0x7c0 [ 23.875375] do_vmi_munmap+0x1f1/0x2b0 [ 23.875703] mmap_region+0x1f9/0x2660 [ 23.876019] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.876361] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.876838] ? __pfx_lock_acquire+0x10/0x10 [ 23.877189] ? __pfx_mmap_region+0x10/0x10 [ 23.877536] ? security_mmap_addr+0x7d/0xa0 [ 23.877893] ? get_unmapped_area+0x1f5/0x3f0 [ 23.878262] do_mmap+0x854/0xf00 [ 23.878551] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.878879] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.879245] ksys_mmap_pgoff+0x3af/0x500 [ 23.879575] do_syscall_64+0x3f/0x90 [ 23.879888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.880311] RIP: 0033:0x7fa6b3f81d82 [ 23.880608] 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 [ 23.882052] RSP: 002b:00007fffb5c5fa28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.882647] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa6b3f81d82 [ 23.883216] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa6b33bb000 [ 23.883782] RBP: 00007fa6b33bb000 R08: 0000000000000009 R09: 0000000000001000 [ 23.884344] R10: 0000000000000812 R11: 0000000000000206 R12: 00005644a55dbec0 [ 23.884908] R13: 00007fffb5c5fa40 R14: 00007fffb5c5fa70 R15: 00007fffb5c5fdd0 [ 23.885470] [ 23.885666] [ 23.885809] Allocated by task 214: [ 23.886104] kasan_save_stack+0x22/0x50 [ 23.886441] kasan_set_track+0x25/0x30 [ 23.886763] __kasan_slab_alloc+0x59/0x70 [ 23.887105] kmem_cache_alloc+0x16b/0x370 [ 23.887446] vm_area_dup+0x20/0x160 [ 23.887746] __split_vma+0x170/0x950 [ 23.888051] split_vma+0xc6/0x110 [ 23.888344] mprotect_fixup+0x8d2/0xb30 [ 23.888678] do_mprotect_pkey+0x87e/0xd40 [ 23.889026] __x64_sys_mprotect+0x78/0xc0 [ 23.889367] do_syscall_64+0x3f/0x90 [ 23.889677] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.890116] [ 23.890259] Freed by task 214: [ 23.890522] kasan_save_stack+0x22/0x50 [ 23.890852] kasan_set_track+0x25/0x30 [ 23.891174] kasan_save_free_info+0x2b/0x50 [ 23.891526] __kasan_slab_free+0x10a/0x190 [ 23.891882] kmem_cache_free+0x10d/0x4d0 [ 23.892214] rcu_core+0x8c8/0x2860 [ 23.892503] __do_softirq+0x1b7/0x7d4 [ 23.892821] [ 23.892960] Last potentially related work creation: [ 23.893351] kasan_save_stack+0x22/0x50 [ 23.893679] __kasan_record_aux_stack+0x8e/0xa0 [ 23.894059] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.894482] remove_vma+0x139/0x170 [ 23.894784] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.895155] do_vmi_munmap+0x1f1/0x2b0 [ 23.895474] __vm_munmap+0x138/0x3a0 [ 23.895785] __x64_sys_munmap+0x59/0x80 [ 23.896114] do_syscall_64+0x3f/0x90 [ 23.896425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.896848] [ 23.896987] The buggy address belongs to the object at ffff8880180d4658 [ 23.896987] which belongs to the cache vm_area_struct of size 168 [ 23.897981] The buggy address is located 88 bytes inside of [ 23.897981] freed 168-byte region [ffff8880180d4658, ffff8880180d4700) [ 23.898911] [ 23.899053] The buggy address belongs to the physical page: [ 23.899489] page:00000000d21d755b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x180d4 [ 23.900209] memcg:ffff8880194ea501 [ 23.900488] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.900915] page_type: 0xffffffff() [ 23.901212] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.901810] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880194ea501 [ 23.902431] page dumped because: kasan: bad access detected [ 23.902871] [ 23.903011] Memory state around the buggy address: [ 23.903392] ffff8880180d4580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.903962] ffff8880180d4600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 23.904530] >ffff8880180d4680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.905098] ^ [ 23.905482] ffff8880180d4700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 23.906076] ffff8880180d4780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 23.906646] ================================================================== [ 23.907523] Disabling lock debugging due to kernel taint [ 25.918812] BUG: Bad rss-counter state mm:00000000ef6e28a3 type:MM_FILEPAGES val:33 [ 25.919996] BUG: Bad rss-counter state mm:00000000ef6e28a3 type:MM_ANONPAGES val:22 [ 26.439851] BUG: Bad rss-counter state mm:0000000086250d1d type:MM_FILEPAGES val:33 [ 26.441015] BUG: Bad rss-counter state mm:0000000086250d1d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36834' (ECDSA) to the list of known hosts. 2023/06/20 19:41:15 fuzzer started 2023/06/20 19:41:15 dialing manager at localhost:36067 2023/06/20 19:41:15 checking machine... 2023/06/20 19:41:15 checking revisions... [ 27.108657] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:41:15 testing simple program... [ 27.153197] cgroup: Unknown subsys name 'net' [ 27.200576] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:41:15 Registers: info registers vcpu 0 RAX=ffffffff8363b743 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110018acf4b RSI=ffffffff8363b743 RDI=ffff88800c567ac8 RBP=ffff88800c567a98 RSP=ffff88800c5679f8 R8 =0000000000000001 R9 =ffff88800c567a40 R10=0000000000038001 R11=000000000008a95e R12=ffff88800c567ac8 R13=0000000000000000 R14=ffff888019400000 R15=ffff88801ab22e40 RIP=ffffffff84538440 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 00007efedd659900 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=00007efeddc110b0 CR3=000000001ca4e000 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=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=00007fa388d89460 CR3=000000000e184000 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=2034313a31343a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a31343a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000