syzkaller login: [ 30.145263] BUG: Bad rss-counter state mm:00000000f38c0774 type:MM_FILEPAGES val:33 [ 30.146280] BUG: Bad rss-counter state mm:00000000f38c0774 type:MM_ANONPAGES val:22 [ 30.314407] ================================================================== [ 30.315336] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.316274] Read of size 8 at addr ffff8880101a83f8 by task sshd/221 [ 30.317041] [ 30.317258] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.318278] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.319265] Call Trace: [ 30.319590] [ 30.319922] dump_stack_lvl+0x91/0xf0 [ 30.320421] print_report+0xcc/0x620 [ 30.320902] ? __virt_addr_valid+0x102/0x340 [ 30.321455] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.322095] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.322706] kasan_report+0xbe/0xf0 [ 30.323192] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.323807] vma_interval_tree_remove+0xc75/0xec0 [ 30.324412] vma_prepare+0xc54/0x11a0 [ 30.324894] __split_vma+0x5af/0x950 [ 30.325368] ? __pfx___split_vma+0x10/0x10 [ 30.325906] ? find_held_lock+0x2c/0x110 [ 30.326436] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.327010] ? lock_is_held_type+0x9f/0x120 [ 30.327553] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.328162] ? mtree_range_walk+0x632/0x900 [ 30.328716] ? mas_walk+0x5c7/0x7c0 [ 30.329199] do_vmi_munmap+0x1f1/0x2b0 [ 30.329692] mmap_region+0x1f9/0x2660 [ 30.330199] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.330714] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.331431] ? __pfx_lock_acquire+0x10/0x10 [ 30.331966] ? __pfx_mmap_region+0x10/0x10 [ 30.332500] ? security_mmap_addr+0x7d/0xa0 [ 30.333034] ? get_unmapped_area+0x1f5/0x3f0 [ 30.333587] do_mmap+0x854/0xf00 [ 30.334037] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.334540] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.335104] ksys_mmap_pgoff+0x3af/0x500 [ 30.335613] do_syscall_64+0x3f/0x90 [ 30.336091] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.336736] RIP: 0033:0x7f20ee8f7d82 [ 30.337193] 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 [ 30.339330] RSP: 002b:00007ffded7ec238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.340245] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f20ee8f7d82 [ 30.341091] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f20edd31000 [ 30.341956] RBP: 00007f20edd31000 R08: 0000000000000009 R09: 0000000000001000 [ 30.342793] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ad1dcc9f60 [ 30.343642] R13: 00007ffded7ec250 R14: 00007ffded7ec280 R15: 00007ffded7ec5e0 [ 30.344509] [ 30.344801] [ 30.345014] Allocated by task 214: [ 30.345440] kasan_save_stack+0x22/0x50 [ 30.345952] kasan_set_track+0x25/0x30 [ 30.346448] __kasan_slab_alloc+0x59/0x70 [ 30.346975] kmem_cache_alloc+0x16b/0x370 [ 30.347493] vm_area_dup+0x20/0x160 [ 30.347948] __split_vma+0x170/0x950 [ 30.348415] split_vma+0xc6/0x110 [ 30.348860] mprotect_fixup+0x8d2/0xb30 [ 30.349360] do_mprotect_pkey+0x87e/0xd40 [ 30.349882] __x64_sys_mprotect+0x78/0xc0 [ 30.350431] do_syscall_64+0x3f/0x90 [ 30.350907] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.351555] [ 30.351774] Freed by task 13: [ 30.352158] kasan_save_stack+0x22/0x50 [ 30.352666] kasan_set_track+0x25/0x30 [ 30.353161] kasan_save_free_info+0x2b/0x50 [ 30.353694] __kasan_slab_free+0x10a/0x190 [ 30.354239] kmem_cache_free+0x10d/0x4d0 [ 30.354749] rcu_core+0x8c8/0x2860 [ 30.355194] __do_softirq+0x1b7/0x7d4 [ 30.355674] [ 30.355889] Last potentially related work creation: [ 30.356476] kasan_save_stack+0x22/0x50 [ 30.356980] __kasan_record_aux_stack+0x8e/0xa0 [ 30.357556] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.358216] remove_vma+0x139/0x170 [ 30.358672] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.359231] do_vmi_munmap+0x1f1/0x2b0 [ 30.359717] __vm_munmap+0x138/0x3a0 [ 30.360185] __x64_sys_munmap+0x59/0x80 [ 30.360686] do_syscall_64+0x3f/0x90 [ 30.361171] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.361814] [ 30.362038] The buggy address belongs to the object at ffff8880101a83a0 [ 30.362038] which belongs to the cache vm_area_struct of size 168 [ 30.363511] The buggy address is located 88 bytes inside of [ 30.363511] freed 168-byte region [ffff8880101a83a0, ffff8880101a8448) [ 30.364918] [ 30.365134] The buggy address belongs to the physical page: [ 30.365794] page:00000000f7a3a40b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101a8 [ 30.366915] memcg:ffff88800ed63701 [ 30.367341] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.367990] page_type: 0xffffffff() [ 30.368440] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.369360] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed63701 [ 30.370275] page dumped because: kasan: bad access detected [ 30.370939] [ 30.371158] Memory state around the buggy address: [ 30.371741] ffff8880101a8280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.372607] ffff8880101a8300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.373464] >ffff8880101a8380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.374317] ^ [ 30.375168] ffff8880101a8400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.376024] ffff8880101a8480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.376883] ================================================================== [ 30.377854] Disabling lock debugging due to kernel taint [ 32.715824] BUG: Bad rss-counter state mm:00000000b128985f type:MM_FILEPAGES val:33 [ 32.717077] BUG: Bad rss-counter state mm:00000000b128985f type:MM_ANONPAGES val:22 [ 33.149445] BUG: Bad rss-counter state mm:0000000012f92aa6 type:MM_FILEPAGES val:33 [ 33.150142] BUG: Bad rss-counter state mm:0000000012f92aa6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62028' (ECDSA) to the list of known hosts. 2023/06/21 04:47:54 fuzzer started 2023/06/21 04:47:54 dialing manager at localhost:36067 2023/06/21 04:47:54 checking machine... 2023/06/21 04:47:54 checking revisions... [ 33.870186] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:47:54 testing simple program... [ 33.926240] cgroup: Unknown subsys name 'net' [ 33.979004] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:47:53 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8617ba8c RDX=0000000000000008 RSI=ffff888015dcfc20 RDI=ffff888015dcf578 RBP=ffff888015dcf5d0 RSP=ffff888015dcf4e8 R8 =ffffffff8617ba90 R9 =ffff888015dcf5b8 R10=0000000000038001 R11=000000000002bf96 R12=ffff888015dcf5d8 R13=ffff888015dcf5c0 R14=ffff888015dcfc28 R15=ffff888015dcf578 RIP=ffffffff81130400 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 00007f26c21ec700 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=00007fcbc074c780 CR3=000000000c53e000 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=2033353a37343a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a37343a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff8614c782 RDX=0000000000000008 RSI=ffff88801469fd80 RDI=ffff88801469f930 RBP=ffff88801469f988 RSP=ffff88801469f8b8 R8 =ffffffff8614c786 R9 =ffff88801469f970 R10=0000000000038001 R11=00000000000241b7 R12=ffff88801469f990 R13=ffff88801469f978 R14=ffff88801469fd88 R15=ffff88801469f930 RIP=ffffffff811303f0 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 00007f80c70c7900 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=00007ffcd742a000 CR3=0000000019eb2000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000