syzkaller login: [ 31.033209] BUG: Bad rss-counter state mm:00000000ae59bcf0 type:MM_FILEPAGES val:33 [ 31.034912] BUG: Bad rss-counter state mm:00000000ae59bcf0 type:MM_ANONPAGES val:22 [ 31.196440] ================================================================== [ 31.197585] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.198566] Read of size 8 at addr ffff88800f01e798 by task sshd/221 [ 31.199467] [ 31.199689] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.200558] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.201550] Call Trace: [ 31.201873] [ 31.202160] dump_stack_lvl+0x91/0xf0 [ 31.202659] print_report+0xcc/0x620 [ 31.203156] ? __virt_addr_valid+0x102/0x340 [ 31.203712] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.204347] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.204978] kasan_report+0xbe/0xf0 [ 31.205471] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.206093] vma_interval_tree_remove+0xc75/0xec0 [ 31.206699] vma_prepare+0xc54/0x11a0 [ 31.207194] __split_vma+0x5af/0x950 [ 31.207680] ? __pfx___split_vma+0x10/0x10 [ 31.208216] ? find_held_lock+0x2c/0x110 [ 31.208760] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.209328] ? lock_is_held_type+0x9f/0x120 [ 31.209869] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.210476] ? mtree_range_walk+0x632/0x900 [ 31.211043] ? mas_walk+0x5c7/0x7c0 [ 31.211519] do_vmi_munmap+0x1f1/0x2b0 [ 31.212020] mmap_region+0x1f9/0x2660 [ 31.212500] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.213022] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.213733] ? __pfx_lock_acquire+0x10/0x10 [ 31.214277] ? __pfx_mmap_region+0x10/0x10 [ 31.214810] ? security_mmap_addr+0x7d/0xa0 [ 31.215347] ? get_unmapped_area+0x1f5/0x3f0 [ 31.215894] do_mmap+0x854/0xf00 [ 31.216344] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.216859] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.217436] ksys_mmap_pgoff+0x3af/0x500 [ 31.217950] do_syscall_64+0x3f/0x90 [ 31.218442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.219095] RIP: 0033:0x7fa26d123d82 [ 31.219565] 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 [ 31.221709] RSP: 002b:00007ffea35b6318 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.222617] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa26d123d82 [ 31.223467] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa26c55d000 [ 31.224310] RBP: 00007fa26c55d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.225169] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b4e4d32ec0 [ 31.226022] R13: 00007ffea35b6330 R14: 00007ffea35b6360 R15: 00007ffea35b66c0 [ 31.226872] [ 31.227166] [ 31.227378] Allocated by task 214: [ 31.227818] kasan_save_stack+0x22/0x50 [ 31.228325] kasan_set_track+0x25/0x30 [ 31.228844] __kasan_slab_alloc+0x59/0x70 [ 31.229369] kmem_cache_alloc+0x16b/0x370 [ 31.229888] vm_area_dup+0x20/0x160 [ 31.230344] __split_vma+0x170/0x950 [ 31.230820] split_vma+0xc6/0x110 [ 31.231256] mprotect_fixup+0x8d2/0xb30 [ 31.231754] do_mprotect_pkey+0x87e/0xd40 [ 31.232283] __x64_sys_mprotect+0x78/0xc0 [ 31.232809] do_syscall_64+0x3f/0x90 [ 31.233280] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.233927] [ 31.234144] Freed by task 214: [ 31.234534] kasan_save_stack+0x22/0x50 [ 31.235050] kasan_set_track+0x25/0x30 [ 31.235543] kasan_save_free_info+0x2b/0x50 [ 31.236093] __kasan_slab_free+0x10a/0x190 [ 31.236623] kmem_cache_free+0x10d/0x4d0 [ 31.237160] rcu_core+0x8c8/0x2860 [ 31.237608] __do_softirq+0x1b7/0x7d4 [ 31.238096] [ 31.238320] Last potentially related work creation: [ 31.238915] kasan_save_stack+0x22/0x50 [ 31.239439] __kasan_record_aux_stack+0x8e/0xa0 [ 31.240043] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.240731] remove_vma+0x139/0x170 [ 31.241211] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.241795] do_vmi_munmap+0x1f1/0x2b0 [ 31.242306] __vm_munmap+0x138/0x3a0 [ 31.242796] __x64_sys_munmap+0x59/0x80 [ 31.243332] do_syscall_64+0x3f/0x90 [ 31.243831] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.244510] [ 31.244756] The buggy address belongs to the object at ffff88800f01e740 [ 31.244756] which belongs to the cache vm_area_struct of size 168 [ 31.246292] The buggy address is located 88 bytes inside of [ 31.246292] freed 168-byte region [ffff88800f01e740, ffff88800f01e7e8) [ 31.247767] [ 31.247993] The buggy address belongs to the physical page: [ 31.248696] page:00000000b2eed4e2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf01e [ 31.249824] memcg:ffff88800c7c9e01 [ 31.250272] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.250947] page_type: 0xffffffff() [ 31.251412] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a8c40 dead000000000006 [ 31.252386] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c7c9e01 [ 31.253344] page dumped because: kasan: bad access detected [ 31.254036] [ 31.254263] Memory state around the buggy address: [ 31.254866] ffff88800f01e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.255766] ffff88800f01e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.256651] >ffff88800f01e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.257556] ^ [ 31.258073] ffff88800f01e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.258977] ffff88800f01e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.259872] ================================================================== [ 31.260939] Disabling lock debugging due to kernel taint [ 33.418066] BUG: Bad rss-counter state mm:00000000a95bd3dc type:MM_FILEPAGES val:33 [ 33.419055] BUG: Bad rss-counter state mm:00000000a95bd3dc type:MM_ANONPAGES val:22 [ 33.985260] BUG: Bad rss-counter state mm:000000007d7bc9e0 type:MM_FILEPAGES val:33 [ 33.986519] BUG: Bad rss-counter state mm:000000007d7bc9e0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18143' (ECDSA) to the list of known hosts. 2023/06/20 19:29:10 fuzzer started 2023/06/20 19:29:10 dialing manager at localhost:36067 2023/06/20 19:29:10 checking machine... 2023/06/20 19:29:10 checking revisions... [ 34.638814] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:29:10 testing simple program... [ 34.695762] cgroup: Unknown subsys name 'net' [ 34.749289] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:29:09 Registers: info registers vcpu 0 RAX=ffffed10033b2826 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffff888019d94130 RDI=0000000000000000 RBP=ffffffff813782f8 RSP=ffff88806ce09e00 R8 =0000000000000002 R9 =0000000000000006 R10=ffffed10033b2826 R11=0000000000000000 R12=ffff888019d94130 R13=ffff88800844f780 R14=ffffffff813782f8 R15=ffff888019d941b0 RIP=ffffffff8180f59b 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 0000000000000000 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=00007fe07fcb3a60 CR3=0000000008c62000 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=5a6c3dfdbbe0f6996f46706243c0a83a XMM02=000000000011fa20ec2efd57dc4c00df XMM03=0000000000122ab0a33bf5df65e08fcc XMM04=6d14dffd46697d7600000000000ae988 XMM05=59d5b690e0af863b0000000000132910 XMM06=ee63e099546cd73d0000000000131778 XMM07=e042d86d42eb936e0000000000122d30 XMM08=a33bf5df65e08fcc000000000011fa80 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed1002d67f8a RBX=1ffff11002d67f8a RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff888016b3fc40 R8 =0000000000000000 R9 =0000000000000000 R10=ffff888016b02277 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8ecd RFL=00000282 [--S----] 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 00007f9a2095d900 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=00007fff6da5c000 CR3=000000000c5ba000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=0000006f730074696d7265705f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000