syzkaller login: [ 30.997818] BUG: Bad rss-counter state mm:00000000796a9fdb type:MM_FILEPAGES val:33 [ 30.998813] BUG: Bad rss-counter state mm:00000000796a9fdb type:MM_ANONPAGES val:22 [ 31.176095] ================================================================== [ 31.177007] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.177946] Read of size 8 at addr ffff88800d030798 by task sshd/221 [ 31.178937] [ 31.179165] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.180054] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.181044] Call Trace: [ 31.181362] [ 31.181654] dump_stack_lvl+0x91/0xf0 [ 31.182140] print_report+0xcc/0x620 [ 31.182628] ? __virt_addr_valid+0x102/0x340 [ 31.183193] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.183821] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.184439] kasan_report+0xbe/0xf0 [ 31.184925] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.185553] vma_interval_tree_remove+0xc75/0xec0 [ 31.186180] vma_prepare+0xc54/0x11a0 [ 31.186674] __split_vma+0x5af/0x950 [ 31.187182] ? __pfx___split_vma+0x10/0x10 [ 31.187730] ? find_held_lock+0x2c/0x110 [ 31.188263] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.188841] ? lock_is_held_type+0x9f/0x120 [ 31.189383] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.189992] ? mtree_range_walk+0x632/0x900 [ 31.190544] ? mas_walk+0x5c7/0x7c0 [ 31.191029] do_vmi_munmap+0x1f1/0x2b0 [ 31.191532] mmap_region+0x1f9/0x2660 [ 31.192029] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.192553] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.193279] ? __pfx_lock_acquire+0x10/0x10 [ 31.193815] ? __pfx_mmap_region+0x10/0x10 [ 31.194366] ? security_mmap_addr+0x7d/0xa0 [ 31.194914] ? get_unmapped_area+0x1f5/0x3f0 [ 31.195495] do_mmap+0x854/0xf00 [ 31.195944] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.196452] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.197025] ksys_mmap_pgoff+0x3af/0x500 [ 31.197545] do_syscall_64+0x3f/0x90 [ 31.198044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.198699] RIP: 0033:0x7fbf08cc7d82 [ 31.199172] 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 [ 31.201374] RSP: 002b:00007ffd2f204348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.202352] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbf08cc7d82 [ 31.203299] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbf08101000 [ 31.204212] RBP: 00007fbf08101000 R08: 0000000000000009 R09: 0000000000001000 [ 31.205118] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ecfd331ec0 [ 31.206027] R13: 00007ffd2f204360 R14: 00007ffd2f204390 R15: 00007ffd2f2046f0 [ 31.206936] [ 31.207259] [ 31.207487] Allocated by task 214: [ 31.207951] kasan_save_stack+0x22/0x50 [ 31.208492] kasan_set_track+0x25/0x30 [ 31.209023] __kasan_slab_alloc+0x59/0x70 [ 31.209578] kmem_cache_alloc+0x16b/0x370 [ 31.210132] vm_area_dup+0x20/0x160 [ 31.210615] __split_vma+0x170/0x950 [ 31.211133] split_vma+0xc6/0x110 [ 31.211598] mprotect_fixup+0x8d2/0xb30 [ 31.212135] do_mprotect_pkey+0x87e/0xd40 [ 31.212691] __x64_sys_mprotect+0x78/0xc0 [ 31.213241] do_syscall_64+0x3f/0x90 [ 31.213746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.214434] [ 31.214667] Freed by task 214: [ 31.215106] kasan_save_stack+0x22/0x50 [ 31.215646] kasan_set_track+0x25/0x30 [ 31.216164] kasan_save_free_info+0x2b/0x50 [ 31.216731] __kasan_slab_free+0x10a/0x190 [ 31.217294] kmem_cache_free+0x10d/0x4d0 [ 31.217836] rcu_core+0x8c8/0x2860 [ 31.218304] __do_softirq+0x1b7/0x7d4 [ 31.218918] [ 31.219160] Last potentially related work creation: [ 31.219788] kasan_save_stack+0x22/0x50 [ 31.220321] __kasan_record_aux_stack+0x8e/0xa0 [ 31.220923] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.221606] remove_vma+0x139/0x170 [ 31.222085] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.222680] do_vmi_munmap+0x1f1/0x2b0 [ 31.223207] __vm_munmap+0x138/0x3a0 [ 31.223706] __x64_sys_munmap+0x59/0x80 [ 31.224229] do_syscall_64+0x3f/0x90 [ 31.224737] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.225420] [ 31.225647] The buggy address belongs to the object at ffff88800d030740 [ 31.225647] which belongs to the cache vm_area_struct of size 168 [ 31.227247] The buggy address is located 88 bytes inside of [ 31.227247] freed 168-byte region [ffff88800d030740, ffff88800d0307e8) [ 31.228761] [ 31.228993] The buggy address belongs to the physical page: [ 31.229698] page:00000000e068d717 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd030 [ 31.230868] memcg:ffff88801a003601 [ 31.231330] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.232019] page_type: 0xffffffff() [ 31.232502] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.233488] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a003601 [ 31.234453] page dumped because: kasan: bad access detected [ 31.235170] [ 31.235396] Memory state around the buggy address: [ 31.236017] ffff88800d030680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.236934] ffff88800d030700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.237851] >ffff88800d030780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.238762] ^ [ 31.239299] ffff88800d030800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.240209] ffff88800d030880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.241123] ================================================================== [ 31.242100] Disabling lock debugging due to kernel taint [ 33.125615] BUG: Bad rss-counter state mm:0000000099a679cd type:MM_FILEPAGES val:33 [ 33.126626] BUG: Bad rss-counter state mm:0000000099a679cd type:MM_ANONPAGES val:22 [ 33.536507] BUG: Bad rss-counter state mm:000000002db534cc type:MM_FILEPAGES val:33 [ 33.537251] BUG: Bad rss-counter state mm:000000002db534cc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21411' (ECDSA) to the list of known hosts. 2023/06/19 21:54:34 fuzzer started 2023/06/19 21:54:34 dialing manager at localhost:44161 2023/06/19 21:54:34 checking machine... 2023/06/19 21:54:34 checking revisions... [ 34.277468] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:54:34 testing simple program... [ 34.324503] cgroup: Unknown subsys name 'net' [ 34.388628] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:54:33 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11002d56f01 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff888016ab77f0 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180fd28 RFL=00000256 [---ZAP-] 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 00007f1741eb0900 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=00007ffcd3097000 CR3=000000000cbba000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=0000000000000001 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=00007efe07bc2000 CR3=0000000009e44000 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=7bdc601524545e804e454b6304630432 XMM02=2c67c8bc2e329bc3000000000011e180 XMM03=fb795ef6d65770560000000000124f60 XMM04=7081133d810f963000000000000ae988 XMM05=487456ab894b380a0000000000135898 XMM06=c291bd5c70af25b90000000000134938 XMM07=e042d86d42eb936e00000000001251e0 XMM08=55a7a094889aff94000000000011e1e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000