syzkaller login: [ 35.195344] BUG: Bad rss-counter state mm:00000000ae0a802b type:MM_FILEPAGES val:33 [ 35.197034] BUG: Bad rss-counter state mm:00000000ae0a802b type:MM_ANONPAGES val:22 [ 35.363340] ================================================================== [ 35.364273] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.365238] Read of size 8 at addr ffff888015c47ed8 by task sshd/220 [ 35.366027] [ 35.366256] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.367313] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.368352] Call Trace: [ 35.368680] [ 35.368984] dump_stack_lvl+0x91/0xf0 [ 35.369508] print_report+0xcc/0x620 [ 35.370016] ? __virt_addr_valid+0x102/0x340 [ 35.370597] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.371272] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.371926] kasan_report+0xbe/0xf0 [ 35.372422] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.373078] vma_interval_tree_remove+0xc75/0xec0 [ 35.373711] vma_prepare+0xc54/0x11a0 [ 35.374220] __split_vma+0x5af/0x950 [ 35.374715] ? __pfx___split_vma+0x10/0x10 [ 35.375276] ? find_held_lock+0x2c/0x110 [ 35.375822] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.376417] ? lock_is_held_type+0x9f/0x120 [ 35.376980] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.377616] ? mtree_range_walk+0x632/0x900 [ 35.378194] ? mas_walk+0x5c7/0x7c0 [ 35.378702] do_vmi_munmap+0x1f1/0x2b0 [ 35.379230] mmap_region+0x1f9/0x2660 [ 35.379740] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.380296] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.381048] ? __pfx_lock_acquire+0x10/0x10 [ 35.381609] ? __pfx_mmap_region+0x10/0x10 [ 35.382162] ? security_mmap_addr+0x7d/0xa0 [ 35.382748] ? get_unmapped_area+0x1f5/0x3f0 [ 35.383344] do_mmap+0x854/0xf00 [ 35.383810] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.384350] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.384937] ksys_mmap_pgoff+0x3af/0x500 [ 35.385472] do_syscall_64+0x3f/0x90 [ 35.385984] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.386664] RIP: 0033:0x7f8496896d82 [ 35.387158] 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 [ 35.389408] RSP: 002b:00007ffdf2c4fcb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.390367] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8496896d82 [ 35.391268] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8495cd0000 [ 35.392174] RBP: 00007f8495cd0000 R08: 0000000000000009 R09: 0000000000001000 [ 35.393067] R10: 0000000000000812 R11: 0000000000000206 R12: 000056132beb3d90 [ 35.393957] R13: 00007ffdf2c4fcd0 R14: 00007ffdf2c4fd00 R15: 00007ffdf2c50060 [ 35.394879] [ 35.395192] [ 35.395417] Allocated by task 213: [ 35.395870] kasan_save_stack+0x22/0x50 [ 35.396401] kasan_set_track+0x25/0x30 [ 35.396921] __kasan_slab_alloc+0x59/0x70 [ 35.397473] kmem_cache_alloc+0x16b/0x370 [ 35.398022] vm_area_dup+0x20/0x160 [ 35.398497] __split_vma+0x170/0x950 [ 35.399005] split_vma+0xc6/0x110 [ 35.399465] mprotect_fixup+0x8d2/0xb30 [ 35.399992] do_mprotect_pkey+0x87e/0xd40 [ 35.400539] __x64_sys_mprotect+0x78/0xc0 [ 35.401091] do_syscall_64+0x3f/0x90 [ 35.401589] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.402259] [ 35.402483] Freed by task 213: [ 35.402906] kasan_save_stack+0x22/0x50 [ 35.403438] kasan_set_track+0x25/0x30 [ 35.403951] kasan_save_free_info+0x2b/0x50 [ 35.404508] __kasan_slab_free+0x10a/0x190 [ 35.405070] kmem_cache_free+0x10d/0x4d0 [ 35.405604] rcu_core+0x8c8/0x2860 [ 35.406067] __do_softirq+0x1b7/0x7d4 [ 35.406572] [ 35.406821] Last potentially related work creation: [ 35.407436] kasan_save_stack+0x22/0x50 [ 35.407965] __kasan_record_aux_stack+0x8e/0xa0 [ 35.408619] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.409291] remove_vma+0x139/0x170 [ 35.409766] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.410352] do_vmi_munmap+0x1f1/0x2b0 [ 35.410875] __vm_munmap+0x138/0x3a0 [ 35.411364] __x64_sys_munmap+0x59/0x80 [ 35.411887] do_syscall_64+0x3f/0x90 [ 35.412380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.413052] [ 35.413278] The buggy address belongs to the object at ffff888015c47e80 [ 35.413278] which belongs to the cache vm_area_struct of size 168 [ 35.414845] The buggy address is located 88 bytes inside of [ 35.414845] freed 168-byte region [ffff888015c47e80, ffff888015c47f28) [ 35.416324] [ 35.416555] The buggy address belongs to the physical page: [ 35.417252] page:000000007a224faf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15c47 [ 35.418397] memcg:ffff88800ffbe201 [ 35.418866] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.419547] page_type: 0xffffffff() [ 35.420027] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.420998] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ffbe201 [ 35.421951] page dumped because: kasan: bad access detected [ 35.422650] [ 35.422894] Memory state around the buggy address: [ 35.423508] ffff888015c47d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.424410] ffff888015c47e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 35.425321] >ffff888015c47e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.426215] ^ [ 35.426994] ffff888015c47f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 35.427894] ffff888015c47f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.428791] ================================================================== [ 35.429860] Disabling lock debugging due to kernel taint [ 38.164858] BUG: Bad rss-counter state mm:00000000f60a1611 type:MM_FILEPAGES val:33 [ 38.166085] BUG: Bad rss-counter state mm:00000000f60a1611 type:MM_ANONPAGES val:22 [ 38.617262] BUG: Bad rss-counter state mm:00000000e28a998d type:MM_FILEPAGES val:33 [ 38.618248] BUG: Bad rss-counter state mm:00000000e28a998d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22556' (ECDSA) to the list of known hosts. 2023/06/19 12:03:38 fuzzer started 2023/06/19 12:03:38 dialing manager at localhost:44161 2023/06/19 12:03:38 checking machine... 2023/06/19 12:03:38 checking revisions... [ 39.319140] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:03:38 testing simple program... [ 39.367101] cgroup: Unknown subsys name 'net' [ 39.417360] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:03:33 Registers: info registers vcpu 0 RAX=ffffed1003412ee1 RBX=1ffff11003412ee1 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800efdc868 RBP=0000000000000001 RSP=ffff88801a0976f8 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff88800efdc868 R15=0000000000000000 RIP=ffffffff812d8e7d RFL=00000086 [--S--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 00007fa985a1a900 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=00007fa985fcf650 CR3=000000000c54a000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 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=00007fff4150b338 CR3=000000000e4dc000 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=2037333a33303a3231203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a33303a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000