syzkaller login: [ 30.783353] BUG: Bad rss-counter state mm:00000000c7542b4d type:MM_FILEPAGES val:33 [ 30.784770] BUG: Bad rss-counter state mm:00000000c7542b4d type:MM_ANONPAGES val:22 [ 30.821761] ================================================================== [ 30.822887] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.823917] Read of size 8 at addr ffff88801958c6b0 by task sshd/221 [ 30.824770] [ 30.825012] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.826000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.827095] Call Trace: [ 30.827446] <TASK> [ 30.827757] dump_stack_lvl+0x91/0xf0 [ 30.828290] print_report+0xcc/0x620 [ 30.828822] ? __virt_addr_valid+0x102/0x340 [ 30.829430] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.830131] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.830819] kasan_report+0xbe/0xf0 [ 30.831344] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.832023] vma_interval_tree_remove+0xc75/0xec0 [ 30.832683] vma_prepare+0xc54/0x11a0 [ 30.833212] __split_vma+0x5af/0x950 [ 30.833733] ? __pfx___split_vma+0x10/0x10 [ 30.834331] ? find_held_lock+0x2c/0x110 [ 30.834900] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.835519] ? lock_is_held_type+0x9f/0x120 [ 30.836107] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.836770] ? mtree_range_walk+0x632/0x900 [ 30.837370] ? mas_walk+0x5c7/0x7c0 [ 30.837874] do_vmi_munmap+0x1f1/0x2b0 [ 30.838421] mmap_region+0x1f9/0x2660 [ 30.838935] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.839483] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.840271] ? __pfx_lock_acquire+0x10/0x10 [ 30.840862] ? __pfx_mmap_region+0x10/0x10 [ 30.841449] ? security_mmap_addr+0x7d/0xa0 [ 30.842033] ? get_unmapped_area+0x1f5/0x3f0 [ 30.842641] do_mmap+0x854/0xf00 [ 30.843124] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.843656] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.844253] ksys_mmap_pgoff+0x3af/0x500 [ 30.844804] do_syscall_64+0x3f/0x90 [ 30.845315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.846021] RIP: 0033:0x7faaff4dfd82 [ 30.846509] 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 [ 30.848797] RSP: 002b:00007ffc85e44788 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.850098] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faaff4dfd82 [ 30.851021] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faafe919000 [ 30.851949] RBP: 00007faafe919000 R08: 0000000000000009 R09: 0000000000001000 [ 30.852859] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ce3ad8bd90 [ 30.853759] R13: 00007ffc85e447a0 R14: 00007ffc85e447d0 R15: 00007ffc85e44b30 [ 30.854693] </TASK> [ 30.855020] [ 30.855257] Allocated by task 214: [ 30.855724] kasan_save_stack+0x22/0x50 [ 30.856279] kasan_set_track+0x25/0x30 [ 30.856818] __kasan_slab_alloc+0x59/0x70 [ 30.857400] kmem_cache_alloc+0x16b/0x370 [ 30.857986] vm_area_dup+0x20/0x160 [ 30.858488] __split_vma+0x170/0x950 [ 30.858998] split_vma+0xc6/0x110 [ 30.859488] mprotect_fixup+0x8d2/0xb30 [ 30.860040] do_mprotect_pkey+0x87e/0xd40 [ 30.860609] __x64_sys_mprotect+0x78/0xc0 [ 30.861181] do_syscall_64+0x3f/0x90 [ 30.861698] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.862411] [ 30.862646] Freed by task 214: [ 30.863074] kasan_save_stack+0x22/0x50 [ 30.863626] kasan_set_track+0x25/0x30 [ 30.864169] kasan_save_free_info+0x2b/0x50 [ 30.864747] __kasan_slab_free+0x10a/0x190 [ 30.865341] kmem_cache_free+0x10d/0x4d0 [ 30.865903] rcu_core+0x8c8/0x2860 [ 30.866386] __do_softirq+0x1b7/0x7d4 [ 30.866907] [ 30.867143] Last potentially related work creation: [ 30.867782] kasan_save_stack+0x22/0x50 [ 30.868336] __kasan_record_aux_stack+0x8e/0xa0 [ 30.868964] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.869670] remove_vma+0x139/0x170 [ 30.870181] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.870783] do_vmi_munmap+0x1f1/0x2b0 [ 30.871314] __vm_munmap+0x138/0x3a0 [ 30.871820] __x64_sys_munmap+0x59/0x80 [ 30.872365] do_syscall_64+0x3f/0x90 [ 30.872891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.873604] [ 30.873845] The buggy address belongs to the object at ffff88801958c658 [ 30.873845] which belongs to the cache vm_area_struct of size 168 [ 30.875454] The buggy address is located 88 bytes inside of [ 30.875454] freed 168-byte region [ffff88801958c658, ffff88801958c700) [ 30.876980] [ 30.877225] The buggy address belongs to the physical page: [ 30.877953] page:00000000e181a5f7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1958c [ 30.879145] memcg:ffff888019588b01 [ 30.879613] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.880318] page_type: 0xffffffff() [ 30.880810] raw: 0100000000000200 ffff8880087a0c80 ffffea0000368c00 dead000000000002 [ 30.881819] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019588b01 [ 30.882818] page dumped because: kasan: bad access detected [ 30.883550] [ 30.883783] Memory state around the buggy address: [ 30.884414] ffff88801958c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.885354] ffff88801958c600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.886299] >ffff88801958c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.887231] ^ [ 30.887864] ffff88801958c700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 30.888803] ffff88801958c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.889736] ================================================================== [ 30.891205] Disabling lock debugging due to kernel taint [ 32.659307] BUG: Bad rss-counter state mm:000000001980596a type:MM_FILEPAGES val:33 [ 32.660419] BUG: Bad rss-counter state mm:000000001980596a type:MM_ANONPAGES val:22 [ 33.026725] BUG: Bad rss-counter state mm:00000000665620fc type:MM_FILEPAGES val:33 [ 33.027359] BUG: Bad rss-counter state mm:00000000665620fc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30772' (ECDSA) to the list of known hosts. 2023/06/21 00:30:09 fuzzer started 2023/06/21 00:30:09 dialing manager at localhost:36067 2023/06/21 00:30:09 checking machine... 2023/06/21 00:30:09 checking revisions... [ 33.748817] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:30:10 testing simple program... [ 33.798298] cgroup: Unknown subsys name 'net' [ 33.847729] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:30:09 Registers: info registers vcpu 0 RAX=ffff888016ba57a0 RBX=ffff88806ce09ee8 RCX=1ffff11002d74af4 RDX=ffff888019a05c60 RSI=0000000000000008 RDI=ffff88806ce09ef8 RBP=0000000000000009 RSP=ffff88806ce09e50 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88806ce09ee8 R14=ffff88806ce35000 R15=ffff888016ba5b30 RIP=ffffffff8137fcd9 RFL=00000246 [---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 00007f9fbf31a900 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=00007ffec83fa000 CR3=0000000019ab0000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=00007f8e97e49820 CR3=0000000009f4e000 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=2039303a30333a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a30333a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000