syzkaller login: [ 30.982433] BUG: Bad rss-counter state mm:00000000b6183aec type:MM_FILEPAGES val:33 [ 30.983472] BUG: Bad rss-counter state mm:00000000b6183aec type:MM_ANONPAGES val:22 [ 31.184116] ================================================================== [ 31.185159] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.186201] Read of size 8 at addr ffff88800d91e310 by task sshd/221 [ 31.187181] [ 31.187450] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.188437] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.189521] Call Trace: [ 31.189888] [ 31.190222] dump_stack_lvl+0x91/0xf0 [ 31.190779] print_report+0xcc/0x620 [ 31.191347] ? __virt_addr_valid+0x102/0x340 [ 31.191980] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.192690] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.193398] kasan_report+0xbe/0xf0 [ 31.193935] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.194664] vma_interval_tree_remove+0xc75/0xec0 [ 31.195352] vma_prepare+0xc54/0x11a0 [ 31.195899] __split_vma+0x5af/0x950 [ 31.196434] ? __pfx___split_vma+0x10/0x10 [ 31.197042] ? find_held_lock+0x2c/0x110 [ 31.197647] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.198291] ? lock_is_held_type+0x9f/0x120 [ 31.198919] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.199640] ? mtree_range_walk+0x632/0x900 [ 31.200264] ? mas_walk+0x5c7/0x7c0 [ 31.200801] do_vmi_munmap+0x1f1/0x2b0 [ 31.201358] mmap_region+0x1f9/0x2660 [ 31.201908] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.202478] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.203276] ? __pfx_lock_acquire+0x10/0x10 [ 31.203914] ? __pfx_mmap_region+0x10/0x10 [ 31.204511] ? security_mmap_addr+0x7d/0xa0 [ 31.205105] ? get_unmapped_area+0x1f5/0x3f0 [ 31.205719] do_mmap+0x854/0xf00 [ 31.206206] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.206768] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.207424] ksys_mmap_pgoff+0x3af/0x500 [ 31.208009] do_syscall_64+0x3f/0x90 [ 31.208570] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.209339] RIP: 0033:0x7fb86a83fd82 [ 31.209863] 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 [ 31.212285] RSP: 002b:00007ffe08367fb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.213328] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb86a83fd82 [ 31.214294] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb869c79000 [ 31.215268] RBP: 00007fb869c79000 R08: 0000000000000009 R09: 0000000000001000 [ 31.216266] R10: 0000000000000812 R11: 0000000000000206 R12: 00005621cdf48ec0 [ 31.217221] R13: 00007ffe08367fd0 R14: 00007ffe08368000 R15: 00007ffe08368360 [ 31.218190] [ 31.218524] [ 31.218774] Allocated by task 212: [ 31.219258] kasan_save_stack+0x22/0x50 [ 31.219852] kasan_set_track+0x25/0x30 [ 31.220411] __kasan_slab_alloc+0x59/0x70 [ 31.221042] kmem_cache_alloc+0x16b/0x370 [ 31.221639] vm_area_dup+0x20/0x160 [ 31.222173] __split_vma+0x170/0x950 [ 31.222740] split_vma+0xc6/0x110 [ 31.223269] mprotect_fixup+0x8d2/0xb30 [ 31.223875] do_mprotect_pkey+0x87e/0xd40 [ 31.224490] __x64_sys_mprotect+0x78/0xc0 [ 31.225111] do_syscall_64+0x3f/0x90 [ 31.225668] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.226428] [ 31.226690] Freed by task 19: [ 31.227143] kasan_save_stack+0x22/0x50 [ 31.227750] kasan_set_track+0x25/0x30 [ 31.228339] kasan_save_free_info+0x2b/0x50 [ 31.228963] __kasan_slab_free+0x10a/0x190 [ 31.229590] kmem_cache_free+0x10d/0x4d0 [ 31.230191] rcu_core+0x8c8/0x2860 [ 31.230718] __do_softirq+0x1b7/0x7d4 [ 31.231277] [ 31.231561] Last potentially related work creation: [ 31.232257] kasan_save_stack+0x22/0x50 [ 31.232857] __kasan_record_aux_stack+0x8e/0xa0 [ 31.233540] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.234313] remove_vma+0x139/0x170 [ 31.234849] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.235528] do_vmi_munmap+0x1f1/0x2b0 [ 31.236107] __vm_munmap+0x138/0x3a0 [ 31.236672] __x64_sys_munmap+0x59/0x80 [ 31.237268] do_syscall_64+0x3f/0x90 [ 31.237840] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.238618] [ 31.238881] The buggy address belongs to the object at ffff88800d91e2b8 [ 31.238881] which belongs to the cache vm_area_struct of size 168 [ 31.240647] The buggy address is located 88 bytes inside of [ 31.240647] freed 168-byte region [ffff88800d91e2b8, ffff88800d91e360) [ 31.242356] [ 31.242615] The buggy address belongs to the physical page: [ 31.243451] page:00000000b4b6d772 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd91e [ 31.244777] memcg:ffff888018dd1a01 [ 31.245295] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.246089] page_type: 0xffffffff() [ 31.246657] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.247799] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018dd1a01 [ 31.248914] page dumped because: kasan: bad access detected [ 31.249736] [ 31.249997] Memory state around the buggy address: [ 31.250710] ffff88800d91e200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.251753] ffff88800d91e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.252784] >ffff88800d91e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.253750] ^ [ 31.254287] ffff88800d91e380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.255252] ffff88800d91e400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.256224] ================================================================== [ 31.257420] Disabling lock debugging due to kernel taint [ 33.191789] BUG: Bad rss-counter state mm:000000002a690ea1 type:MM_FILEPAGES val:33 [ 33.192466] BUG: Bad rss-counter state mm:000000002a690ea1 type:MM_ANONPAGES val:22 [ 33.667369] BUG: Bad rss-counter state mm:000000007ae3e32d type:MM_FILEPAGES val:33 [ 33.668452] BUG: Bad rss-counter state mm:000000007ae3e32d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5741' (ECDSA) to the list of known hosts. 2023/06/20 22:22:51 fuzzer started 2023/06/20 22:22:51 dialing manager at localhost:36067 2023/06/20 22:22:51 checking machine... 2023/06/20 22:22:51 checking revisions... [ 34.313165] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:22:51 testing simple program... [ 34.368247] cgroup: Unknown subsys name 'net' [ 34.425403] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:22:51 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880088cf440 RCX=0000000000000000 RDX=ffff8880146a3680 RSI=ffffffff844f4031 RDI=0000000000000007 RBP=0000000000000000 RSP=ffff88801474f8b0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6d53 R12=ffff88801474f928 R13=0000000000000000 R14=ffff8880101f4000 R15=0000000000000000 RIP=ffffffff814c0864 RFL=00000082 [--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1bc64c2900 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=00007f1bc59309b0 CR3=0000000009a94000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=2da2c4ab1386a48c00000000000ae988 XMM05=e14787c94c134e9a00000000001327f8 XMM06=806171799158d9670000000000131898 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801678dd60 RCX=0000000000000000 RDX=ffff88800e7d51c0 RSI=ffffffff818c666d RDI=ffffffff84d2ecb8 RBP=ffffffff84d2ec80 RSP=ffff888018fb7d00 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=ffff88801678de38 R14=0000000000000000 R15=ffff88801678ddd0 RIP=ffffffff818c666d 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 00007f47669c9900 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=00007ffe88007000 CR3=0000000010086000 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