syzkaller login: [ 37.196011] BUG: Bad rss-counter state mm:0000000018405d96 type:MM_FILEPAGES val:33 [ 37.197524] BUG: Bad rss-counter state mm:0000000018405d96 type:MM_ANONPAGES val:22 [ 37.355061] ================================================================== [ 37.356017] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.356996] Read of size 8 at addr ffff888019d50228 by task sshd/220 [ 37.357796] [ 37.358024] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.359140] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.360168] Call Trace: [ 37.360502] [ 37.360799] dump_stack_lvl+0x91/0xf0 [ 37.361315] print_report+0xcc/0x620 [ 37.361824] ? __virt_addr_valid+0x102/0x340 [ 37.362401] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.363073] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.363725] kasan_report+0xbe/0xf0 [ 37.364219] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.364861] vma_interval_tree_remove+0xc75/0xec0 [ 37.365490] vma_prepare+0xc54/0x11a0 [ 37.365995] __split_vma+0x5af/0x950 [ 37.366493] ? __pfx___split_vma+0x10/0x10 [ 37.367060] ? find_held_lock+0x2c/0x110 [ 37.367609] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.368204] ? lock_is_held_type+0x9f/0x120 [ 37.368778] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.369407] ? mtree_range_walk+0x632/0x900 [ 37.369991] ? mas_walk+0x5c7/0x7c0 [ 37.370493] do_vmi_munmap+0x1f1/0x2b0 [ 37.371015] mmap_region+0x1f9/0x2660 [ 37.371530] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.372061] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.372818] ? __pfx_lock_acquire+0x10/0x10 [ 37.373374] ? __pfx_mmap_region+0x10/0x10 [ 37.373921] ? security_mmap_addr+0x7d/0xa0 [ 37.374476] ? get_unmapped_area+0x1f5/0x3f0 [ 37.375072] do_mmap+0x854/0xf00 [ 37.375533] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.376053] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.376645] ksys_mmap_pgoff+0x3af/0x500 [ 37.377176] do_syscall_64+0x3f/0x90 [ 37.377678] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.378349] RIP: 0033:0x7fb7f44fcd82 [ 37.378851] 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 [ 37.381085] RSP: 002b:00007ffe95ddcf68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.382033] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb7f44fcd82 [ 37.382929] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb7f3936000 [ 37.383828] RBP: 00007fb7f3936000 R08: 0000000000000009 R09: 0000000000001000 [ 37.384708] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558f478d6ec0 [ 37.385602] R13: 00007ffe95ddcf80 R14: 00007ffe95ddcfb0 R15: 00007ffe95ddd310 [ 37.386507] [ 37.386844] [ 37.387071] Allocated by task 213: [ 37.387515] kasan_save_stack+0x22/0x50 [ 37.388046] kasan_set_track+0x25/0x30 [ 37.388567] __kasan_slab_alloc+0x59/0x70 [ 37.389116] kmem_cache_alloc+0x16b/0x370 [ 37.389656] vm_area_dup+0x20/0x160 [ 37.390131] __split_vma+0x170/0x950 [ 37.390618] split_vma+0xc6/0x110 [ 37.391086] mprotect_fixup+0x8d2/0xb30 [ 37.391609] do_mprotect_pkey+0x87e/0xd40 [ 37.392155] __x64_sys_mprotect+0x78/0xc0 [ 37.392702] do_syscall_64+0x3f/0x90 [ 37.393195] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.393867] [ 37.394097] Freed by task 213: [ 37.394501] kasan_save_stack+0x22/0x50 [ 37.395052] kasan_set_track+0x25/0x30 [ 37.395571] kasan_save_free_info+0x2b/0x50 [ 37.396128] __kasan_slab_free+0x10a/0x190 [ 37.396685] kmem_cache_free+0x10d/0x4d0 [ 37.397220] rcu_core+0x8c8/0x2860 [ 37.397681] __do_softirq+0x1b7/0x7d4 [ 37.398186] [ 37.398410] Last potentially related work creation: [ 37.399027] kasan_save_stack+0x22/0x50 [ 37.399559] __kasan_record_aux_stack+0x8e/0xa0 [ 37.400219] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.400907] remove_vma+0x139/0x170 [ 37.401384] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.401963] do_vmi_munmap+0x1f1/0x2b0 [ 37.402472] __vm_munmap+0x138/0x3a0 [ 37.402991] __x64_sys_munmap+0x59/0x80 [ 37.403516] do_syscall_64+0x3f/0x90 [ 37.404030] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.404713] [ 37.404945] The buggy address belongs to the object at ffff888019d501d0 [ 37.404945] which belongs to the cache vm_area_struct of size 168 [ 37.406496] The buggy address is located 88 bytes inside of [ 37.406496] freed 168-byte region [ffff888019d501d0, ffff888019d50278) [ 37.407992] [ 37.408227] The buggy address belongs to the physical page: [ 37.408929] page:00000000951450ce refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d50 [ 37.410078] memcg:ffff888019dabd01 [ 37.410518] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 37.411267] page_type: 0xffffffff() [ 37.411743] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 37.412715] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019dabd01 [ 37.413668] page dumped because: kasan: bad access detected [ 37.414357] [ 37.414593] Memory state around the buggy address: [ 37.415222] ffff888019d50100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.416130] ffff888019d50180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 37.417042] >ffff888019d50200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 37.417951] ^ [ 37.418533] ffff888019d50280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 37.419444] ffff888019d50300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 37.420347] ================================================================== [ 37.421351] Disabling lock debugging due to kernel taint [ 40.055532] BUG: Bad rss-counter state mm:000000004a36c737 type:MM_FILEPAGES val:33 [ 40.056274] BUG: Bad rss-counter state mm:000000004a36c737 type:MM_ANONPAGES val:22 [ 40.494384] BUG: Bad rss-counter state mm:0000000097cfc8ca type:MM_FILEPAGES val:33 [ 40.495161] BUG: Bad rss-counter state mm:0000000097cfc8ca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5522' (ECDSA) to the list of known hosts. 2023/06/19 23:43:16 fuzzer started 2023/06/19 23:43:16 dialing manager at localhost:44161 2023/06/19 23:43:16 checking machine... 2023/06/19 23:43:16 checking revisions... [ 41.142119] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:43:17 testing simple program... [ 41.199811] cgroup: Unknown subsys name 'net' [ 41.248619] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:43:09 Registers: info registers vcpu 0 RAX=ffffffff86088c1f RBX=0000000000000001 RCX=ffffffff86088c1a RDX=dffffc0000000000 RSI=0000000000000000 RDI=1ffffffff0c11183 RBP=ffff888016527a20 RSP=ffff888016527908 R8 =ffffffff86088c1e R9 =ffff888016527a08 R10=0000000000038001 R11=0000000000003c0d R12=ffff888016527a28 R13=ffff888016527a10 R14=ffff888016527a09 R15=ffff8880165279c8 RIP=ffffffff81130aa4 RFL=00000213 [----A-C] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fbbac0cb900 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=00007fbbac680650 CR3=000000001ca98000 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=25252525252525252525252525252525 XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000ffffff XMM08=7265737520726f66206465736f6c6320 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fff7f716fd8 CR3=0000000005482000 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=00007fa61cf095100000558925afb790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000