syzkaller login: [ 30.704382] BUG: Bad rss-counter state mm:00000000364ecfce type:MM_FILEPAGES val:33 [ 30.705576] BUG: Bad rss-counter state mm:00000000364ecfce type:MM_ANONPAGES val:22 [ 30.742331] ================================================================== [ 30.743315] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.744224] Read of size 8 at addr ffff88800d68bdf0 by task sshd/221 [ 30.744999] [ 30.745274] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.746127] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.747109] Call Trace: [ 30.747434] [ 30.747722] dump_stack_lvl+0x91/0xf0 [ 30.748205] print_report+0xcc/0x620 [ 30.748678] ? __virt_addr_valid+0x102/0x340 [ 30.749216] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.749822] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.750424] kasan_report+0xbe/0xf0 [ 30.750909] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.751527] vma_interval_tree_remove+0xc75/0xec0 [ 30.752108] vma_prepare+0xc54/0x11a0 [ 30.752584] __split_vma+0x5af/0x950 [ 30.753048] ? __pfx___split_vma+0x10/0x10 [ 30.753574] ? find_held_lock+0x2c/0x110 [ 30.754081] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.754635] ? lock_is_held_type+0x9f/0x120 [ 30.755178] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.755772] ? mtree_range_walk+0x632/0x900 [ 30.756313] ? mas_walk+0x5c7/0x7c0 [ 30.756781] do_vmi_munmap+0x1f1/0x2b0 [ 30.757249] mmap_region+0x1f9/0x2660 [ 30.757725] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.758220] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.758933] ? __pfx_lock_acquire+0x10/0x10 [ 30.759453] ? __pfx_mmap_region+0x10/0x10 [ 30.759971] ? security_mmap_addr+0x7d/0xa0 [ 30.760493] ? get_unmapped_area+0x1f5/0x3f0 [ 30.761028] do_mmap+0x854/0xf00 [ 30.761460] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.761951] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.762497] ksys_mmap_pgoff+0x3af/0x500 [ 30.762995] do_syscall_64+0x3f/0x90 [ 30.763474] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.764114] RIP: 0033:0x7f357d6a3d82 [ 30.764559] 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 [ 30.766648] RSP: 002b:00007ffd3fc949a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.767545] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f357d6a3d82 [ 30.768377] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f357cadd000 [ 30.769208] RBP: 00007f357cadd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.770029] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557964533b20 [ 30.770859] R13: 00007ffd3fc949c0 R14: 00007ffd3fc949f0 R15: 00007ffd3fc94d50 [ 30.771718] [ 30.771999] [ 30.772211] Allocated by task 214: [ 30.772633] kasan_save_stack+0x22/0x50 [ 30.773122] kasan_set_track+0x25/0x30 [ 30.773613] __kasan_slab_alloc+0x59/0x70 [ 30.774120] kmem_cache_alloc+0x16b/0x370 [ 30.774628] vm_area_dup+0x20/0x160 [ 30.775073] __split_vma+0x170/0x950 [ 30.775526] split_vma+0xc6/0x110 [ 30.775952] mprotect_fixup+0x8d2/0xb30 [ 30.776452] do_mprotect_pkey+0x87e/0xd40 [ 30.776958] __x64_sys_mprotect+0x78/0xc0 [ 30.777479] do_syscall_64+0x3f/0x90 [ 30.777942] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.778572] [ 30.778794] Freed by task 214: [ 30.779168] kasan_save_stack+0x22/0x50 [ 30.779666] kasan_set_track+0x25/0x30 [ 30.780157] kasan_save_free_info+0x2b/0x50 [ 30.780685] __kasan_slab_free+0x10a/0x190 [ 30.781210] kmem_cache_free+0x10d/0x4d0 [ 30.781713] rcu_core+0x8c8/0x2860 [ 30.782138] __do_softirq+0x1b7/0x7d4 [ 30.782606] [ 30.782823] Last potentially related work creation: [ 30.783396] kasan_save_stack+0x22/0x50 [ 30.783883] __kasan_record_aux_stack+0x8e/0xa0 [ 30.784445] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.785070] remove_vma+0x139/0x170 [ 30.785512] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.786058] do_vmi_munmap+0x1f1/0x2b0 [ 30.786528] __vm_munmap+0x138/0x3a0 [ 30.786995] __x64_sys_munmap+0x59/0x80 [ 30.787489] do_syscall_64+0x3f/0x90 [ 30.787955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.788599] [ 30.788813] The buggy address belongs to the object at ffff88800d68bd98 [ 30.788813] which belongs to the cache vm_area_struct of size 168 [ 30.790250] The buggy address is located 88 bytes inside of [ 30.790250] freed 168-byte region [ffff88800d68bd98, ffff88800d68be40) [ 30.791639] [ 30.791849] The buggy address belongs to the physical page: [ 30.792496] page:00000000c2499fed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd68b [ 30.793572] memcg:ffff88800d64ce01 [ 30.793987] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.794676] page_type: 0xffffffff() [ 30.795127] raw: 0100000000000200 ffff8880087a0c80 ffffea0000403580 dead000000000005 [ 30.796040] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d64ce01 [ 30.796937] page dumped because: kasan: bad access detected [ 30.797600] [ 30.797821] Memory state around the buggy address: [ 30.798394] ffff88800d68bc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.799258] ffff88800d68bd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.800098] >ffff88800d68bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.800941] ^ [ 30.801744] ffff88800d68be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.802589] ffff88800d68be80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.803428] ================================================================== [ 30.804448] Disabling lock debugging due to kernel taint [ 32.708192] BUG: Bad rss-counter state mm:000000008d449fdf type:MM_FILEPAGES val:33 [ 32.709206] BUG: Bad rss-counter state mm:000000008d449fdf type:MM_ANONPAGES val:22 [ 33.249132] BUG: Bad rss-counter state mm:00000000ab482f0e type:MM_FILEPAGES val:33 [ 33.250274] BUG: Bad rss-counter state mm:00000000ab482f0e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19626' (ECDSA) to the list of known hosts. 2023/06/20 11:16:08 fuzzer started 2023/06/20 11:16:08 dialing manager at localhost:36067 2023/06/20 11:16:08 checking machine... 2023/06/20 11:16:08 checking revisions... [ 33.928878] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:16:08 testing simple program... [ 33.980276] cgroup: Unknown subsys name 'net' [ 34.035420] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:16:08 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880143e1bc0 RCX=1ffffffff0ba7c92 RDX=1ffff1100287c380 RSI=0000000000000001 RDI=ffff8880143e1c00 RBP=ffff88806ce395c0 RSP=ffff88801599f5e8 R8 =ffff88800f9752c0 R9 =ffffed100287c368 R10=ffff8880143e1b47 R11=0000000000000001 R12=ffff88806ce39500 R13=00000007b7a04783 R14=ffff88806ce39500 R15=ffff8880143e1b40 RIP=ffffffff81252404 RFL=00000046 [---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 00007f314130a900 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=00007f31418bf650 CR3=000000000c8f2000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864bbb54 RDX=1ffff11002b33f3b RSI=0000000000000000 RDI=ffff88801599f9d8 RBP=0000000000000008 RSP=ffff88801599f918 R8 =ffffffff864bbb58 R9 =ffff88801599f9c8 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88801599ff58 R13=ffff88801599f9d0 R14=ffff88801599ff58 R15=ffff88801599f988 RIP=ffffffff81131c0a 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 00007f314130a900 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=00007f31418c20b0 CR3=000000000c8f2000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000