syzkaller login: [ 30.766356] BUG: Bad rss-counter state mm:0000000093f8a060 type:MM_FILEPAGES val:33 [ 30.767466] BUG: Bad rss-counter state mm:0000000093f8a060 type:MM_ANONPAGES val:22 [ 30.862638] ================================================================== [ 30.863342] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.864051] Read of size 8 at addr ffff88800e9554e0 by task sshd/220 [ 30.864637] [ 30.864803] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.865451] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.866193] Call Trace: [ 30.866437] [ 30.866654] dump_stack_lvl+0x91/0xf0 [ 30.867034] print_report+0xcc/0x620 [ 30.867655] ? __virt_addr_valid+0x102/0x340 [ 30.868072] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.868539] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.869009] kasan_report+0xbe/0xf0 [ 30.869377] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.869863] vma_interval_tree_remove+0xc75/0xec0 [ 30.870315] vma_prepare+0xc54/0x11a0 [ 30.870677] __split_vma+0x5af/0x950 [ 30.871032] ? __pfx___split_vma+0x10/0x10 [ 30.871449] ? find_held_lock+0x2c/0x110 [ 30.871764] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.872076] ? lock_is_held_type+0x9f/0x120 [ 30.872375] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.872727] ? mtree_range_walk+0x632/0x900 [ 30.873055] ? mas_walk+0x5c7/0x7c0 [ 30.873336] do_vmi_munmap+0x1f1/0x2b0 [ 30.873625] mmap_region+0x1f9/0x2660 [ 30.873912] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.874217] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.874647] ? __pfx_lock_acquire+0x10/0x10 [ 30.874972] ? __pfx_mmap_region+0x10/0x10 [ 30.875290] ? security_mmap_addr+0x7d/0xa0 [ 30.875620] ? get_unmapped_area+0x1f5/0x3f0 [ 30.875947] do_mmap+0x854/0xf00 [ 30.876210] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.876507] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.876841] ksys_mmap_pgoff+0x3af/0x500 [ 30.877142] do_syscall_64+0x3f/0x90 [ 30.877431] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.877823] RIP: 0033:0x7f728b50fd82 [ 30.878099] 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 [ 30.879370] RSP: 002b:00007ffe14dfd658 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.879908] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f728b50fd82 [ 30.880422] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f728a949000 [ 30.880930] RBP: 00007f728a949000 R08: 0000000000000009 R09: 0000000000001000 [ 30.881434] R10: 0000000000000812 R11: 0000000000000206 R12: 000055853c9a4f70 [ 30.881939] R13: 00007ffe14dfd670 R14: 00007ffe14dfd6a0 R15: 00007ffe14dfda00 [ 30.882457] [ 30.882631] [ 30.882757] Allocated by task 213: [ 30.883013] kasan_save_stack+0x22/0x50 [ 30.883322] kasan_set_track+0x25/0x30 [ 30.883618] __kasan_slab_alloc+0x59/0x70 [ 30.883929] kmem_cache_alloc+0x16b/0x370 [ 30.884235] vm_area_dup+0x20/0x160 [ 30.884502] __split_vma+0x170/0x950 [ 30.884788] split_vma+0xc6/0x110 [ 30.885052] mprotect_fixup+0x8d2/0xb30 [ 30.885349] do_mprotect_pkey+0x87e/0xd40 [ 30.885654] __x64_sys_mprotect+0x78/0xc0 [ 30.885962] do_syscall_64+0x3f/0x90 [ 30.886248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.886643] [ 30.886772] Freed by task 19: [ 30.886998] kasan_save_stack+0x22/0x50 [ 30.887301] kasan_set_track+0x25/0x30 [ 30.887599] kasan_save_free_info+0x2b/0x50 [ 30.887921] __kasan_slab_free+0x10a/0x190 [ 30.888238] kmem_cache_free+0x10d/0x4d0 [ 30.888542] rcu_core+0x8c8/0x2860 [ 30.888810] __do_softirq+0x1b7/0x7d4 [ 30.889094] [ 30.889218] Last potentially related work creation: [ 30.889576] kasan_save_stack+0x22/0x50 [ 30.889879] __kasan_record_aux_stack+0x8e/0xa0 [ 30.890225] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.890615] remove_vma+0x139/0x170 [ 30.890881] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.891214] do_vmi_munmap+0x1f1/0x2b0 [ 30.891518] __vm_munmap+0x138/0x3a0 [ 30.891797] __x64_sys_munmap+0x59/0x80 [ 30.892086] do_syscall_64+0x3f/0x90 [ 30.892367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.892747] [ 30.892872] Second to last potentially related work creation: [ 30.893286] kasan_save_stack+0x22/0x50 [ 30.893584] __kasan_record_aux_stack+0x8e/0xa0 [ 30.893923] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.894303] remove_vma+0x139/0x170 [ 30.894570] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.894901] do_vmi_munmap+0x1f1/0x2b0 [ 30.895193] mmap_region+0x1f9/0x2660 [ 30.895484] do_mmap+0x854/0xf00 [ 30.895736] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.896026] ksys_mmap_pgoff+0x3af/0x500 [ 30.896321] do_syscall_64+0x3f/0x90 [ 30.896602] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.896979] [ 30.897109] The buggy address belongs to the object at ffff88800e955488 [ 30.897109] which belongs to the cache vm_area_struct of size 168 [ 30.897979] The buggy address is located 88 bytes inside of [ 30.897979] freed 168-byte region [ffff88800e955488, ffff88800e955530) [ 30.898811] [ 30.898939] The buggy address belongs to the physical page: [ 30.899349] page:000000005c796d81 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe955 [ 30.899997] memcg:ffff88800e077801 [ 30.900251] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.900673] page_type: 0xffffffff() [ 30.900941] raw: 0100000000000200 ffff8880087a0c80 ffffea000025fdc0 dead000000000003 [ 30.901482] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e077801 [ 30.902028] page dumped because: kasan: bad access detected [ 30.902421] [ 30.902550] Memory state around the buggy address: [ 30.902901] ffff88800e955380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.903408] ffff88800e955400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.903912] >ffff88800e955480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.904413] ^ [ 30.904856] ffff88800e955500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.905363] ffff88800e955580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.905862] ================================================================== [ 30.906399] Disabling lock debugging due to kernel taint [ 33.025097] BUG: Bad rss-counter state mm:0000000091d9855a type:MM_FILEPAGES val:33 [ 33.026296] BUG: Bad rss-counter state mm:0000000091d9855a type:MM_ANONPAGES val:22 [ 33.570969] BUG: Bad rss-counter state mm:0000000060576b29 type:MM_FILEPAGES val:33 [ 33.571971] BUG: Bad rss-counter state mm:0000000060576b29 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27523' (ECDSA) to the list of known hosts. 2023/06/21 04:33:34 fuzzer started 2023/06/21 04:33:35 dialing manager at localhost:36067 2023/06/21 04:33:35 checking machine... 2023/06/21 04:33:35 checking revisions... [ 34.165813] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:33:35 testing simple program... [ 34.217974] cgroup: Unknown subsys name 'net' [ 34.271350] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:33:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff8613961e RDX=0000000000000001 RSI=0000000000000000 RDI=ffffffff86139620 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000020ed2 R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09de0 R15=ffff88806ce09a70 RIP=ffffffff81131204 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 0000000000000000 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=00007ffc15c8a708 CR3=0000000009a92000 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=2034333a33333a3430203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a33333a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806c400000 RBX=00000000ca327ba9 RCX=ffff88806c53dd48 RDX=000000000000000f RSI=0000000000000003 RDI=00000000da10a61d RBP=ffff88800cb32bd0 RSP=ffff88800c7ef4e8 R8 =0000000051badff8 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000000 R14=ffff88800c7ef550 R15=000000000000000f RIP=ffffffff822704d3 RFL=00000206 [-----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 00007fb709963900 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=00007fb709f1a618 CR3=000000000c5ce000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000