syzkaller login: [ 31.045227] BUG: Bad rss-counter state mm:000000006b951122 type:MM_FILEPAGES val:33 [ 31.046602] BUG: Bad rss-counter state mm:000000006b951122 type:MM_ANONPAGES val:22 [ 31.169219] ================================================================== [ 31.170112] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.171067] Read of size 8 at addr ffff88800f6e83f8 by task sshd/220 [ 31.171854] [ 31.172151] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.173027] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.173985] Call Trace: [ 31.174311] [ 31.174593] dump_stack_lvl+0x91/0xf0 [ 31.175089] print_report+0xcc/0x620 [ 31.175601] ? __virt_addr_valid+0x102/0x340 [ 31.176156] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.176774] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.177389] kasan_report+0xbe/0xf0 [ 31.177864] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.178482] vma_interval_tree_remove+0xc75/0xec0 [ 31.179099] vma_prepare+0xc54/0x11a0 [ 31.179597] __split_vma+0x5af/0x950 [ 31.180073] ? __pfx___split_vma+0x10/0x10 [ 31.180602] ? find_held_lock+0x2c/0x110 [ 31.181129] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.181692] ? lock_is_held_type+0x9f/0x120 [ 31.182229] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.182836] ? mtree_range_walk+0x632/0x900 [ 31.183456] ? mas_walk+0x5c7/0x7c0 [ 31.184097] do_vmi_munmap+0x1f1/0x2b0 [ 31.184751] mmap_region+0x1f9/0x2660 [ 31.185398] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.186087] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.187022] ? __pfx_lock_acquire+0x10/0x10 [ 31.187623] ? __pfx_mmap_region+0x10/0x10 [ 31.188184] ? security_mmap_addr+0x7d/0xa0 [ 31.188726] ? get_unmapped_area+0x1f5/0x3f0 [ 31.189315] do_mmap+0x854/0xf00 [ 31.189770] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.190285] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.190849] ksys_mmap_pgoff+0x3af/0x500 [ 31.191402] do_syscall_64+0x3f/0x90 [ 31.191888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.192664] RIP: 0033:0x7fc8c97ded82 [ 31.193125] 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 [ 31.195303] RSP: 002b:00007ffdd5181e68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.196218] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc8c97ded82 [ 31.197073] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc8c8c18000 [ 31.197927] RBP: 00007fc8c8c18000 R08: 0000000000000009 R09: 0000000000001000 [ 31.198780] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b833e77ec0 [ 31.199646] R13: 00007ffdd5181e80 R14: 00007ffdd5181eb0 R15: 00007ffdd5182210 [ 31.200518] [ 31.200812] [ 31.201028] Allocated by task 213: [ 31.201455] kasan_save_stack+0x22/0x50 [ 31.201956] kasan_set_track+0x25/0x30 [ 31.202450] __kasan_slab_alloc+0x59/0x70 [ 31.202979] kmem_cache_alloc+0x16b/0x370 [ 31.203511] vm_area_dup+0x20/0x160 [ 31.203972] __split_vma+0x170/0x950 [ 31.204530] split_vma+0xc6/0x110 [ 31.204986] mprotect_fixup+0x8d2/0xb30 [ 31.205486] do_mprotect_pkey+0x87e/0xd40 [ 31.206007] __x64_sys_mprotect+0x78/0xc0 [ 31.206566] do_syscall_64+0x3f/0x90 [ 31.207047] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.207753] [ 31.207972] Freed by task 213: [ 31.208382] kasan_save_stack+0x22/0x50 [ 31.208896] kasan_set_track+0x25/0x30 [ 31.209424] kasan_save_free_info+0x2b/0x50 [ 31.209960] __kasan_slab_free+0x10a/0x190 [ 31.210545] kmem_cache_free+0x10d/0x4d0 [ 31.211082] rcu_core+0x8c8/0x2860 [ 31.211559] __do_softirq+0x1b7/0x7d4 [ 31.212045] [ 31.212273] Last potentially related work creation: [ 31.212860] kasan_save_stack+0x22/0x50 [ 31.213394] __kasan_record_aux_stack+0x8e/0xa0 [ 31.213973] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.214656] remove_vma+0x139/0x170 [ 31.215118] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.215700] do_vmi_munmap+0x1f1/0x2b0 [ 31.216189] __vm_munmap+0x138/0x3a0 [ 31.216657] __x64_sys_munmap+0x59/0x80 [ 31.217151] do_syscall_64+0x3f/0x90 [ 31.217629] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.218272] [ 31.218490] The buggy address belongs to the object at ffff88800f6e83a0 [ 31.218490] which belongs to the cache vm_area_struct of size 168 [ 31.219972] The buggy address is located 88 bytes inside of [ 31.219972] freed 168-byte region [ffff88800f6e83a0, ffff88800f6e8448) [ 31.221370] [ 31.221587] The buggy address belongs to the physical page: [ 31.222246] page:000000004d300aa7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf6e8 [ 31.223345] memcg:ffff888019e32e01 [ 31.223773] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.224418] page_type: 0xffffffff() [ 31.224872] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.225783] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e32e01 [ 31.226685] page dumped because: kasan: bad access detected [ 31.227361] [ 31.227574] Memory state around the buggy address: [ 31.228162] ffff88800f6e8280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.229021] ffff88800f6e8300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.229881] >ffff88800f6e8380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.230737] ^ [ 31.231591] ffff88800f6e8400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.232454] ffff88800f6e8480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.233308] ================================================================== [ 31.234260] Disabling lock debugging due to kernel taint [ 33.087489] BUG: Bad rss-counter state mm:00000000f583b35a type:MM_FILEPAGES val:33 [ 33.088675] BUG: Bad rss-counter state mm:00000000f583b35a type:MM_ANONPAGES val:22 [ 33.530200] BUG: Bad rss-counter state mm:00000000c53da0ad type:MM_FILEPAGES val:33 [ 33.531222] BUG: Bad rss-counter state mm:00000000c53da0ad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7314' (ECDSA) to the list of known hosts. 2023/06/20 14:29:20 fuzzer started 2023/06/20 14:29:20 dialing manager at localhost:36067 2023/06/20 14:29:20 checking machine... 2023/06/20 14:29:20 checking revisions... [ 34.267828] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:29:20 testing simple program... [ 34.305034] cgroup: Unknown subsys name 'net' [ 34.355731] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:29:20 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff83c60bd1 RDX=ffff8880102b51c0 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800fc876a0 R8 =0000000000000005 R9 =00000000000000ff R10=000000000000000b R11=0000096900000969 R12=0000000000000000 R13=000000000000000b R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff814c02c5 RFL=00000293 [--S-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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fbaae879900 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=00007fbaaee30618 CR3=000000000ef7e000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f5084318780 CR3=0000000014550000 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=78ba3409d2a74e81a44480b175985625 XMM02=000000000011a110ec2efd57dc4c00df XMM03=00000000001219a07f327d6ebde01784 XMM04=c765f421d6a13b6b00000000000ae988 XMM05=2e250c1293b7101c0000000000131d20 XMM06=4fda316b135da52b0000000000131718 XMM07=e042d86d42eb936e0000000000121c20 XMM08=7f327d6ebde01784000000000011a170 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000