syzkaller login: [ 78.492297] BUG: Bad rss-counter state mm:000000007ebb3120 type:MM_FILEPAGES val:33 [ 78.493256] BUG: Bad rss-counter state mm:000000007ebb3120 type:MM_ANONPAGES val:22 [ 78.667804] ================================================================== [ 78.668978] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 78.670263] Read of size 8 at addr ffff88800ee745c8 by task sshd/220 [ 78.671151] [ 78.671373] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 78.672262] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 78.673235] Call Trace: [ 78.673557] [ 78.673840] dump_stack_lvl+0x91/0xf0 [ 78.674323] print_report+0xcc/0x620 [ 78.674806] ? __virt_addr_valid+0x102/0x340 [ 78.675355] ? vma_interval_tree_remove+0xc75/0xec0 [ 78.675972] ? vma_interval_tree_remove+0xc75/0xec0 [ 78.676614] kasan_report+0xbe/0xf0 [ 78.677068] ? vma_interval_tree_remove+0xc75/0xec0 [ 78.677665] vma_interval_tree_remove+0xc75/0xec0 [ 78.678241] vma_prepare+0xc54/0x11a0 [ 78.678696] __split_vma+0x5af/0x950 [ 78.679153] ? __pfx___split_vma+0x10/0x10 [ 78.679655] ? find_held_lock+0x2c/0x110 [ 78.680168] do_vmi_align_munmap+0x2ba/0x11f0 [ 78.680710] ? lock_is_held_type+0x9f/0x120 [ 78.681221] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 78.681795] ? mtree_range_walk+0x632/0x900 [ 78.682319] ? mas_walk+0x5c7/0x7c0 [ 78.682769] do_vmi_munmap+0x1f1/0x2b0 [ 78.683242] mmap_region+0x1f9/0x2660 [ 78.683702] ? vm_mmap_pgoff+0x15c/0x3a0 [ 78.684208] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 78.684932] ? __pfx_lock_acquire+0x10/0x10 [ 78.685458] ? __pfx_mmap_region+0x10/0x10 [ 78.685996] ? security_mmap_addr+0x7d/0xa0 [ 78.686526] ? get_unmapped_area+0x1f5/0x3f0 [ 78.687082] do_mmap+0x854/0xf00 [ 78.687520] vm_mmap_pgoff+0x1a6/0x3a0 [ 78.688027] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 78.688710] ksys_mmap_pgoff+0x3af/0x500 [ 78.689312] do_syscall_64+0x3f/0x90 [ 78.689873] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.690652] RIP: 0033:0x7f637cac1d82 [ 78.691202] 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 [ 78.693900] RSP: 002b:00007ffefc948678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 78.695045] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f637cac1d82 [ 78.696123] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f637befb000 [ 78.697182] RBP: 00007f637befb000 R08: 0000000000000009 R09: 0000000000001000 [ 78.698189] R10: 0000000000000812 R11: 0000000000000206 R12: 00005624602a8ec0 [ 78.699118] R13: 00007ffefc948690 R14: 00007ffefc9486c0 R15: 00007ffefc948a20 [ 78.700201] [ 78.700562] [ 78.700825] Allocated by task 213: [ 78.701350] kasan_save_stack+0x22/0x50 [ 78.701968] kasan_set_track+0x25/0x30 [ 78.702577] __kasan_slab_alloc+0x59/0x70 [ 78.703202] kmem_cache_alloc+0x16b/0x370 [ 78.703826] vm_area_dup+0x20/0x160 [ 78.704378] __split_vma+0x170/0x950 [ 78.704941] split_vma+0xc6/0x110 [ 78.705466] mprotect_fixup+0x8d2/0xb30 [ 78.706066] do_mprotect_pkey+0x87e/0xd40 [ 78.706692] __x64_sys_mprotect+0x78/0xc0 [ 78.707323] do_syscall_64+0x3f/0x90 [ 78.707893] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.708673] [ 78.708925] Freed by task 220: [ 78.709397] kasan_save_stack+0x22/0x50 [ 78.710002] kasan_set_track+0x25/0x30 [ 78.710601] kasan_save_free_info+0x2b/0x50 [ 78.711245] __kasan_slab_free+0x10a/0x190 [ 78.711892] kmem_cache_free+0x10d/0x4d0 [ 78.712536] rcu_core+0x8c8/0x2860 [ 78.713084] __do_softirq+0x1b7/0x7d4 [ 78.713662] [ 78.713918] Last potentially related work creation: [ 78.714637] kasan_save_stack+0x22/0x50 [ 78.715237] __kasan_record_aux_stack+0x8e/0xa0 [ 78.715928] __call_rcu_common.constprop.0+0x6a/0xb90 [ 78.716573] remove_vma+0x139/0x170 [ 78.717003] do_vmi_align_munmap+0xd4a/0x11f0 [ 78.717526] do_vmi_munmap+0x1f1/0x2b0 [ 78.717984] __vm_munmap+0x138/0x3a0 [ 78.718422] __x64_sys_munmap+0x59/0x80 [ 78.718891] do_syscall_64+0x3f/0x90 [ 78.719338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.719945] [ 78.720164] Second to last potentially related work creation: [ 78.720805] kasan_save_stack+0x22/0x50 [ 78.721279] __kasan_record_aux_stack+0x8e/0xa0 [ 78.721819] __call_rcu_common.constprop.0+0x6a/0xb90 [ 78.722463] remove_vma+0x139/0x170 [ 78.722956] do_vmi_align_munmap+0xd4a/0x11f0 [ 78.723563] do_vmi_munmap+0x1f1/0x2b0 [ 78.724103] mmap_region+0x1f9/0x2660 [ 78.724616] do_mmap+0x854/0xf00 [ 78.725074] vm_mmap_pgoff+0x1a6/0x3a0 [ 78.725602] ksys_mmap_pgoff+0x3af/0x500 [ 78.726143] do_syscall_64+0x3f/0x90 [ 78.726658] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.727335] [ 78.727563] The buggy address belongs to the object at ffff88800ee74570 [ 78.727563] which belongs to the cache vm_area_struct of size 168 [ 78.729111] The buggy address is located 88 bytes inside of [ 78.729111] freed 168-byte region [ffff88800ee74570, ffff88800ee74618) [ 78.730580] [ 78.730817] The buggy address belongs to the physical page: [ 78.731518] page:00000000598153bf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee74 [ 78.732675] memcg:ffff88800ce84701 [ 78.733121] flags: 0x100000000000200(slab|node=0|zone=1) [ 78.733802] page_type: 0xffffffff() [ 78.734281] raw: 0100000000000200 ffff88800879fc80 ffffea0000604040 dead000000000004 [ 78.735244] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ce84701 [ 78.736217] page dumped because: kasan: bad access detected [ 78.736913] [ 78.737147] Memory state around the buggy address: [ 78.737767] ffff88800ee74480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 78.738666] ffff88800ee74500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 78.739570] >ffff88800ee74580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 78.740483] ^ [ 78.741192] ffff88800ee74600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 78.742115] ffff88800ee74680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 78.743029] ================================================================== [ 78.744053] Disabling lock debugging due to kernel taint [ 81.440587] BUG: Bad rss-counter state mm:0000000073c15470 type:MM_FILEPAGES val:33 [ 81.441634] BUG: Bad rss-counter state mm:0000000073c15470 type:MM_ANONPAGES val:22 [ 82.017683] BUG: Bad rss-counter state mm:000000001b028990 type:MM_FILEPAGES val:33 [ 82.018983] BUG: Bad rss-counter state mm:000000001b028990 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53230' (ECDSA) to the list of known hosts. 2023/06/20 01:00:43 fuzzer started 2023/06/20 01:00:43 dialing manager at localhost:44161 2023/06/20 01:00:43 checking machine... 2023/06/20 01:00:43 checking revisions... [ 82.807452] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:00:44 testing simple program... [ 82.866972] cgroup: Unknown subsys name 'net' [ 82.919535] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:00:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016cff901 RSI=ffff888016cff8f8 RDI=ffff888016cff8f8 RBP=ffff888016cff580 RSP=ffff888016cff4b8 R8 =0000000000000001 R9 =ffff888016cff568 R10=0000000000038001 R11=0000000000020c48 R12=ffff888016cff588 R13=ffff888016cff570 R14=ffff888016cff8f8 R15=ffff888016cff528 RIP=ffffffff81131236 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 00007f3aad1ce700 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=00007f1497518270 CR3=0000000016972000 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=2033343a30303a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a30303a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf09b38 RCX=ffffffff860d6801 RDX=1ffff1100d9e1368 RSI=ffffffff8180c522 RDI=ffff88806cf09b40 RBP=0000000000000000 RSP=ffff88806cf09a50 R8 =ffffffff860d68fa R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000010b7e R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff888016d2d1c0 R15=ffff88800d8bcc00 RIP=ffffffff813ad485 RFL=00000287 [--S--PC] 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 00007f5db00c2900 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=00007ffe17ca2000 CR3=000000000e618000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000