syzkaller login: [ 71.212207] BUG: Bad rss-counter state mm:00000000b57c7863 type:MM_FILEPAGES val:33 [ 71.213453] BUG: Bad rss-counter state mm:00000000b57c7863 type:MM_ANONPAGES val:22 [ 71.357998] ================================================================== [ 71.358894] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 71.359838] Read of size 8 at addr ffff88800e2f4ed8 by task sshd/219 [ 71.360603] [ 71.360826] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 71.361954] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 71.362923] Call Trace: [ 71.363241] <TASK> [ 71.363524] dump_stack_lvl+0x91/0xf0 [ 71.364025] print_report+0xcc/0x620 [ 71.364513] ? __virt_addr_valid+0x102/0x340 [ 71.365060] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.365685] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.366293] kasan_report+0xbe/0xf0 [ 71.366774] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.367382] vma_interval_tree_remove+0xc75/0xec0 [ 71.367969] vma_prepare+0xc54/0x11a0 [ 71.368471] __split_vma+0x5af/0x950 [ 71.368939] ? __pfx___split_vma+0x10/0x10 [ 71.369463] ? find_held_lock+0x2c/0x110 [ 71.369977] do_vmi_align_munmap+0x2ba/0x11f0 [ 71.370536] ? lock_is_held_type+0x9f/0x120 [ 71.371075] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 71.371668] ? mtree_range_walk+0x632/0x900 [ 71.372220] ? mas_walk+0x5c7/0x7c0 [ 71.372690] do_vmi_munmap+0x1f1/0x2b0 [ 71.373179] mmap_region+0x1f9/0x2660 [ 71.373652] ? vm_mmap_pgoff+0x15c/0x3a0 [ 71.374162] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 71.374872] ? __pfx_lock_acquire+0x10/0x10 [ 71.375405] ? __pfx_mmap_region+0x10/0x10 [ 71.375936] ? security_mmap_addr+0x7d/0xa0 [ 71.376466] ? get_unmapped_area+0x1f5/0x3f0 [ 71.377016] do_mmap+0x854/0xf00 [ 71.377454] vm_mmap_pgoff+0x1a6/0x3a0 [ 71.377938] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 71.378493] ksys_mmap_pgoff+0x3af/0x500 [ 71.378996] do_syscall_64+0x3f/0x90 [ 71.379465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.380106] RIP: 0033:0x7f9788cfed82 [ 71.380580] 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 [ 71.382699] RSP: 002b:00007fffa2d1c538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 71.383597] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9788cfed82 [ 71.384443] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9788138000 [ 71.385284] RBP: 00007f9788138000 R08: 0000000000000009 R09: 0000000000001000 [ 71.386125] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555ca4b87b20 [ 71.386954] R13: 00007fffa2d1c550 R14: 00007fffa2d1c580 R15: 00007fffa2d1c8e0 [ 71.387803] </TASK> [ 71.388090] [ 71.388324] Allocated by task 212: [ 71.388751] kasan_save_stack+0x22/0x50 [ 71.389251] kasan_set_track+0x25/0x30 [ 71.389745] __kasan_slab_alloc+0x59/0x70 [ 71.390263] kmem_cache_alloc+0x16b/0x370 [ 71.390768] vm_area_dup+0x20/0x160 [ 71.391221] __split_vma+0x170/0x950 [ 71.391682] split_vma+0xc6/0x110 [ 71.392118] mprotect_fixup+0x8d2/0xb30 [ 71.392623] do_mprotect_pkey+0x87e/0xd40 [ 71.393138] __x64_sys_mprotect+0x78/0xc0 [ 71.393649] do_syscall_64+0x3f/0x90 [ 71.394116] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.394758] [ 71.394972] Freed by task 212: [ 71.395357] kasan_save_stack+0x22/0x50 [ 71.395859] kasan_set_track+0x25/0x30 [ 71.396352] kasan_save_free_info+0x2b/0x50 [ 71.396874] __kasan_slab_free+0x10a/0x190 [ 71.397400] kmem_cache_free+0x10d/0x4d0 [ 71.397902] rcu_core+0x8c8/0x2860 [ 71.398342] __do_softirq+0x1b7/0x7d4 [ 71.398818] [ 71.399030] Last potentially related work creation: [ 71.399603] kasan_save_stack+0x22/0x50 [ 71.400105] __kasan_record_aux_stack+0x8e/0xa0 [ 71.400691] __call_rcu_common.constprop.0+0x6a/0xb90 [ 71.401323] remove_vma+0x139/0x170 [ 71.401771] do_vmi_align_munmap+0xd4a/0x11f0 [ 71.402331] do_vmi_munmap+0x1f1/0x2b0 [ 71.402813] __vm_munmap+0x138/0x3a0 [ 71.403310] __x64_sys_munmap+0x59/0x80 [ 71.403804] do_syscall_64+0x3f/0x90 [ 71.404284] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.404931] [ 71.405144] Second to last potentially related work creation: [ 71.405823] kasan_save_stack+0x22/0x50 [ 71.406324] __kasan_record_aux_stack+0x8e/0xa0 [ 71.406891] __call_rcu_common.constprop.0+0x6a/0xb90 [ 71.407523] remove_vma+0x139/0x170 [ 71.407972] do_vmi_align_munmap+0xd4a/0x11f0 [ 71.408549] do_vmi_munmap+0x1f1/0x2b0 [ 71.409036] mmap_region+0x1f9/0x2660 [ 71.409509] do_mmap+0x854/0xf00 [ 71.409938] vm_mmap_pgoff+0x1a6/0x3a0 [ 71.410422] ksys_mmap_pgoff+0x3af/0x500 [ 71.410917] do_syscall_64+0x3f/0x90 [ 71.411388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.412019] [ 71.412241] The buggy address belongs to the object at ffff88800e2f4e80 [ 71.412241] which belongs to the cache vm_area_struct of size 168 [ 71.413704] The buggy address is located 88 bytes inside of [ 71.413704] freed 168-byte region [ffff88800e2f4e80, ffff88800e2f4f28) [ 71.415100] [ 71.415318] The buggy address belongs to the physical page: [ 71.415972] page:000000004be04433 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2f4 [ 71.417055] memcg:ffff88800da58f01 [ 71.417477] flags: 0x100000000000200(slab|node=0|zone=1) [ 71.418115] page_type: 0xffffffff() [ 71.418563] raw: 0100000000000200 ffff88800879fc80 ffffea0000409a80 dead000000000002 [ 71.419469] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da58f01 [ 71.420383] page dumped because: kasan: bad access detected [ 71.421039] [ 71.421251] Memory state around the buggy address: [ 71.421833] ffff88800e2f4d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 71.422749] ffff88800e2f4e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 71.423598] >ffff88800e2f4e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 71.424444] ^ [ 71.425159] ffff88800e2f4f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 71.426015] ffff88800e2f4f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 71.426861] ================================================================== [ 71.427768] Disabling lock debugging due to kernel taint [ 73.392263] BUG: Bad rss-counter state mm:00000000a0c6adcc type:MM_FILEPAGES val:33 [ 73.393710] BUG: Bad rss-counter state mm:00000000a0c6adcc type:MM_ANONPAGES val:22 [ 73.951755] BUG: Bad rss-counter state mm:0000000031187baa type:MM_FILEPAGES val:33 [ 73.952923] BUG: Bad rss-counter state mm:0000000031187baa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43811' (ECDSA) to the list of known hosts. 2023/06/20 08:31:04 fuzzer started 2023/06/20 08:31:04 dialing manager at localhost:44161 2023/06/20 08:31:04 checking machine... 2023/06/20 08:31:04 checking revisions... [ 74.677740] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:31:04 testing simple program... [ 74.713075] cgroup: Unknown subsys name 'net' [ 74.798452] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:30:31 Registers: info registers vcpu 0 RAX=1ffffffff0c0a745 RBX=ffffffff86053a2c RCX=ffffffff846000a9 RDX=0000000000000000 RSI=ffffffff864b9d50 RDI=ffffffff86053a2c RBP=ffffffff86053a2c RSP=ffff8880147a7388 R8 =ffffffff864b9d50 R9 =ffff8880147a7480 R10=0000000000038001 R11=00000000000b6996 R12=ffffffff86053a30 R13=ffffffff86053a2c R14=ffffffff86053a2c R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f92314b0900 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=00007f92308d8a20 CR3=0000000013b7e000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=d575beb1b089f39500000000000ae988 XMM05=2139c586f8ba2e0d000000000013a520 XMM06=806171799158d9670000000000139250 XMM07=fb795ef6d657705600000000001280f8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000001255 RCX=0000000000000000 RDX=1ffff11001f90403 RSI=ffffffff8171b393 RDI=ffff88800fc82018 RBP=ffff88800cb7f000 RSP=ffff88800ecdfe78 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000040 R11=0000000000000000 R12=ffff88800fc81b40 R13=00007fc5c95a834c R14=ffff88800cb7f010 R15=0000000000000040 RIP=ffffffff8171b3b9 RFL=00000216 [----AP-] 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 00007fc5c8fee900 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=00007fc5c95a834c CR3=000000001bc44000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000