syzkaller login: [ 28.766739] BUG: Bad rss-counter state mm:000000003788390a type:MM_FILEPAGES val:33 [ 28.767722] BUG: Bad rss-counter state mm:000000003788390a type:MM_ANONPAGES val:22 [ 28.912298] ================================================================== [ 28.913388] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.914512] Read of size 8 at addr ffff88800d881b38 by task sshd/220 [ 28.915551] [ 28.915811] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.916867] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.917909] Call Trace: [ 28.918231] [ 28.918516] dump_stack_lvl+0x91/0xf0 [ 28.919011] print_report+0xcc/0x620 [ 28.919498] ? __virt_addr_valid+0x102/0x340 [ 28.920050] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.920670] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.921295] kasan_report+0xbe/0xf0 [ 28.921772] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.922412] vma_interval_tree_remove+0xc75/0xec0 [ 28.923114] vma_prepare+0xc54/0x11a0 [ 28.923576] __split_vma+0x5af/0x950 [ 28.924039] ? __pfx___split_vma+0x10/0x10 [ 28.924560] ? find_held_lock+0x2c/0x110 [ 28.925078] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.925625] ? lock_is_held_type+0x9f/0x120 [ 28.926153] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.926750] ? mtree_range_walk+0x632/0x900 [ 28.927293] ? mas_walk+0x5c7/0x7c0 [ 28.927766] do_vmi_munmap+0x1f1/0x2b0 [ 28.928243] mmap_region+0x1f9/0x2660 [ 28.928715] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.929232] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.929935] ? __pfx_lock_acquire+0x10/0x10 [ 28.930453] ? __pfx_mmap_region+0x10/0x10 [ 28.930972] ? security_mmap_addr+0x7d/0xa0 [ 28.931488] ? get_unmapped_area+0x1f5/0x3f0 [ 28.932020] do_mmap+0x854/0xf00 [ 28.932451] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.932941] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.933499] ksys_mmap_pgoff+0x3af/0x500 [ 28.933998] do_syscall_64+0x3f/0x90 [ 28.934466] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.935101] RIP: 0033:0x7f69361d3d82 [ 28.935547] 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 [ 28.937644] RSP: 002b:00007fff7ace1708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.938527] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f69361d3d82 [ 28.939351] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f693560d000 [ 28.940176] RBP: 00007f693560d000 R08: 0000000000000009 R09: 0000000000001000 [ 28.941020] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d46ba16d90 [ 28.941843] R13: 00007fff7ace1720 R14: 00007fff7ace1750 R15: 00007fff7ace1ab0 [ 28.942678] [ 28.942964] [ 28.943173] Allocated by task 212: [ 28.943597] kasan_save_stack+0x22/0x50 [ 28.944089] kasan_set_track+0x25/0x30 [ 28.944570] __kasan_slab_alloc+0x59/0x70 [ 28.945091] kmem_cache_alloc+0x16b/0x370 [ 28.945602] vm_area_dup+0x20/0x160 [ 28.946046] __split_vma+0x170/0x950 [ 28.946508] split_vma+0xc6/0x110 [ 28.946950] mprotect_fixup+0x8d2/0xb30 [ 28.947451] do_mprotect_pkey+0x87e/0xd40 [ 28.947978] __x64_sys_mprotect+0x78/0xc0 [ 28.948505] do_syscall_64+0x3f/0x90 [ 28.949002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.949644] [ 28.949861] Freed by task 212: [ 28.950259] kasan_save_stack+0x22/0x50 [ 28.950762] kasan_set_track+0x25/0x30 [ 28.951260] kasan_save_free_info+0x2b/0x50 [ 28.951794] __kasan_slab_free+0x10a/0x190 [ 28.952330] kmem_cache_free+0x10d/0x4d0 [ 28.952854] rcu_core+0x8c8/0x2860 [ 28.953299] __do_softirq+0x1b7/0x7d4 [ 28.953778] [ 28.953992] Last potentially related work creation: [ 28.954575] kasan_save_stack+0x22/0x50 [ 28.955083] __kasan_record_aux_stack+0x8e/0xa0 [ 28.955656] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.956302] remove_vma+0x139/0x170 [ 28.956803] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.957365] do_vmi_munmap+0x1f1/0x2b0 [ 28.957857] __vm_munmap+0x138/0x3a0 [ 28.958331] __x64_sys_munmap+0x59/0x80 [ 28.958830] do_syscall_64+0x3f/0x90 [ 28.959304] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.959945] [ 28.960160] Second to last potentially related work creation: [ 28.960851] kasan_save_stack+0x22/0x50 [ 28.961354] __kasan_record_aux_stack+0x8e/0xa0 [ 28.961926] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.962580] remove_vma+0x139/0x170 [ 28.963032] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.963594] do_vmi_munmap+0x1f1/0x2b0 [ 28.964083] mmap_region+0x1f9/0x2660 [ 28.964571] do_mmap+0x854/0xf00 [ 28.965016] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.965509] ksys_mmap_pgoff+0x3af/0x500 [ 28.966020] do_syscall_64+0x3f/0x90 [ 28.966500] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.967147] [ 28.967361] The buggy address belongs to the object at ffff88800d881ae0 [ 28.967361] which belongs to the cache vm_area_struct of size 168 [ 28.968863] The buggy address is located 88 bytes inside of [ 28.968863] freed 168-byte region [ffff88800d881ae0, ffff88800d881b88) [ 28.970268] [ 28.970483] The buggy address belongs to the physical page: [ 28.971145] page:000000006c8fca0b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd881 [ 28.972228] memcg:ffff88800d4d3701 [ 28.972658] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.973367] page_type: 0xffffffff() [ 28.973826] raw: 0100000000000200 ffff8880087a0c80 ffffea000039e0c0 dead000000000007 [ 28.974755] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d4d3701 [ 28.975672] page dumped because: kasan: bad access detected [ 28.976338] [ 28.976554] Memory state around the buggy address: [ 28.977154] ffff88800d881a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.978015] ffff88800d881a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 28.978869] >ffff88800d881b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.979723] ^ [ 28.980337] ffff88800d881b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 28.981207] ffff88800d881c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 28.982060] ================================================================== [ 28.982980] Disabling lock debugging due to kernel taint [ 31.270787] BUG: Bad rss-counter state mm:00000000e033b901 type:MM_FILEPAGES val:33 [ 31.271734] BUG: Bad rss-counter state mm:00000000e033b901 type:MM_ANONPAGES val:22 [ 31.843842] BUG: Bad rss-counter state mm:0000000005982ca4 type:MM_FILEPAGES val:33 [ 31.845120] BUG: Bad rss-counter state mm:0000000005982ca4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16383' (ECDSA) to the list of known hosts. 2023/06/21 01:31:51 fuzzer started 2023/06/21 01:31:52 dialing manager at localhost:36067 2023/06/21 01:31:52 checking machine... 2023/06/21 01:31:52 checking revisions... [ 32.483252] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:31:52 testing simple program... [ 32.548607] cgroup: Unknown subsys name 'net' [ 32.587155] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:31:51 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=00000000958106fe RCX=ffff88806c4837f0 RDX=000000000000000e RSI=0000000000000001 RDI=00000000ce857b88 RBP=ffff88800d561b30 RSP=ffff888016eb79f8 R8 =00000000ea3fd1bd R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000dc0 R14=ffff888016eb7a60 R15=000000000000000e RIP=ffffffff822704d3 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 00007fad357c1900 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=00007fad35d790b0 CR3=000000000e4ec000 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=00007efd776cbda0 CR3=00000000196fa000 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=2031353a31333a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a31333a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000