syzkaller login: [ 30.160787] BUG: Bad rss-counter state mm:00000000d3a93716 type:MM_FILEPAGES val:33 [ 30.161984] BUG: Bad rss-counter state mm:00000000d3a93716 type:MM_ANONPAGES val:22 [ 30.331429] ================================================================== [ 30.332572] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.333764] Read of size 8 at addr ffff888015acfa50 by task sshd/221 [ 30.334524] [ 30.334742] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.335611] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.336593] Call Trace: [ 30.336913] [ 30.337203] dump_stack_lvl+0x91/0xf0 [ 30.337698] print_report+0xcc/0x620 [ 30.338187] ? __virt_addr_valid+0x102/0x340 [ 30.338740] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.339350] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.339960] kasan_report+0xbe/0xf0 [ 30.340461] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.341080] vma_interval_tree_remove+0xc75/0xec0 [ 30.341686] vma_prepare+0xc54/0x11a0 [ 30.342168] __split_vma+0x5af/0x950 [ 30.342645] ? __pfx___split_vma+0x10/0x10 [ 30.343171] ? find_held_lock+0x2c/0x110 [ 30.343693] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.344285] ? lock_is_held_type+0x9f/0x120 [ 30.344818] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.345420] ? mtree_range_walk+0x632/0x900 [ 30.345970] ? mas_walk+0x5c7/0x7c0 [ 30.346446] do_vmi_munmap+0x1f1/0x2b0 [ 30.346938] mmap_region+0x1f9/0x2660 [ 30.347417] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.347937] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.348672] ? __pfx_lock_acquire+0x10/0x10 [ 30.349200] ? __pfx_mmap_region+0x10/0x10 [ 30.349729] ? security_mmap_addr+0x7d/0xa0 [ 30.350257] ? get_unmapped_area+0x1f5/0x3f0 [ 30.350804] do_mmap+0x854/0xf00 [ 30.351250] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.351750] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.352339] ksys_mmap_pgoff+0x3af/0x500 [ 30.352846] do_syscall_64+0x3f/0x90 [ 30.353337] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.353975] RIP: 0033:0x7fc8a44cbd82 [ 30.354438] 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 [ 30.356577] RSP: 002b:00007fffadba3b28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.357482] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc8a44cbd82 [ 30.358328] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc8a3905000 [ 30.359185] RBP: 00007fc8a3905000 R08: 0000000000000009 R09: 0000000000001000 [ 30.360022] R10: 0000000000000812 R11: 0000000000000206 R12: 000056045ee4fec0 [ 30.360897] R13: 00007fffadba3b40 R14: 00007fffadba3b70 R15: 00007fffadba3ed0 [ 30.361759] [ 30.362051] [ 30.362269] Allocated by task 214: [ 30.362697] kasan_save_stack+0x22/0x50 [ 30.363197] kasan_set_track+0x25/0x30 [ 30.363700] __kasan_slab_alloc+0x59/0x70 [ 30.364244] kmem_cache_alloc+0x16b/0x370 [ 30.364763] vm_area_dup+0x20/0x160 [ 30.365212] __split_vma+0x170/0x950 [ 30.365689] split_vma+0xc6/0x110 [ 30.366122] mprotect_fixup+0x8d2/0xb30 [ 30.366631] do_mprotect_pkey+0x87e/0xd40 [ 30.367153] __x64_sys_mprotect+0x78/0xc0 [ 30.367668] do_syscall_64+0x3f/0x90 [ 30.368151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.368798] [ 30.369015] Freed by task 214: [ 30.369402] kasan_save_stack+0x22/0x50 [ 30.369900] kasan_set_track+0x25/0x30 [ 30.370399] kasan_save_free_info+0x2b/0x50 [ 30.370924] __kasan_slab_free+0x10a/0x190 [ 30.371454] kmem_cache_free+0x10d/0x4d0 [ 30.371958] rcu_core+0x8c8/0x2860 [ 30.372417] __do_softirq+0x1b7/0x7d4 [ 30.372894] [ 30.373109] Last potentially related work creation: [ 30.373686] kasan_save_stack+0x22/0x50 [ 30.374191] __kasan_record_aux_stack+0x8e/0xa0 [ 30.374826] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.375466] remove_vma+0x139/0x170 [ 30.375913] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.376499] do_vmi_munmap+0x1f1/0x2b0 [ 30.376986] __vm_munmap+0x138/0x3a0 [ 30.377456] __x64_sys_munmap+0x59/0x80 [ 30.377961] do_syscall_64+0x3f/0x90 [ 30.378436] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.379079] [ 30.379296] The buggy address belongs to the object at ffff888015acf9f8 [ 30.379296] which belongs to the cache vm_area_struct of size 168 [ 30.380776] The buggy address is located 88 bytes inside of [ 30.380776] freed 168-byte region [ffff888015acf9f8, ffff888015acfaa0) [ 30.382185] [ 30.382407] The buggy address belongs to the physical page: [ 30.383074] page:00000000ca6f7833 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15acf [ 30.384169] memcg:ffff888018390901 [ 30.384596] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.385236] page_type: 0xffffffff() [ 30.385683] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.386613] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018390901 [ 30.387522] page dumped because: kasan: bad access detected [ 30.388191] [ 30.388405] Memory state around the buggy address: [ 30.388983] ffff888015acf900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.389826] ffff888015acf980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.390691] >ffff888015acfa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.391531] ^ [ 30.392239] ffff888015acfa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.393086] ffff888015acfb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.393930] ================================================================== [ 30.394862] Disabling lock debugging due to kernel taint [ 32.491068] BUG: Bad rss-counter state mm:00000000ab86f223 type:MM_FILEPAGES val:33 [ 32.492229] BUG: Bad rss-counter state mm:00000000ab86f223 type:MM_ANONPAGES val:22 [ 32.858341] BUG: Bad rss-counter state mm:0000000004271e26 type:MM_FILEPAGES val:33 [ 32.859668] BUG: Bad rss-counter state mm:0000000004271e26 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46767' (ECDSA) to the list of known hosts. 2023/06/21 04:31:26 fuzzer started 2023/06/21 04:31:26 dialing manager at localhost:36067 2023/06/21 04:31:26 checking machine... 2023/06/21 04:31:26 checking revisions... [ 33.674270] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:31:27 testing simple program... [ 33.735077] cgroup: Unknown subsys name 'net' [ 33.779909] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:31:26 Registers: info registers vcpu 0 RAX=ffff88806ce0a001 RBX=ffff88806ce09a50 RCX=0000000000000002 RDX=ffff88806ce0a001 RSI=ffff88806ce09ff8 RDI=ffff88806ce09a60 RBP=ffff88806ce09ff8 RSP=ffff88806ce099a8 R8 =ffffffff864b2f42 R9 =ffff88806ce09a90 R10=0000000000038001 R11=00000000000b5305 R12=0000000000000008 R13=ffff88806ce02000 R14=ffff88806ce09ff8 R15=ffff88806ce09a50 RIP=ffffffff811304c9 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 00007f86f54ba700 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=00007fc1b984c0b0 CR3=0000000015a8a000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732036323a3133 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383239 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff815345ff RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff888016997f58 RSP=ffff888016997f30 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff888016997f58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff84512042 RFL=00000002 [-------] 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 00007fc1b9294900 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=00007fff45548000 CR3=000000000caaa000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000