[ 24.167779] BUG: Bad rss-counter state mm:00000000d2deb1b4 type:MM_FILEPAGES val:33 [ 24.169625] BUG: Bad rss-counter state mm:00000000d2deb1b4 type:MM_ANONPAGES val:22 [ 24.335728] ================================================================== [ 24.336633] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.337571] Read of size 8 at addr ffff88801b16d4e0 by task sshd/219 [ 24.338370] [ 24.338587] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.339538] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.340512] Call Trace: [ 24.340851] [ 24.341139] dump_stack_lvl+0x91/0xf0 [ 24.341634] print_report+0xcc/0x620 [ 24.342132] ? __virt_addr_valid+0x102/0x340 [ 24.342689] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.343318] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.343932] kasan_report+0xbe/0xf0 [ 24.344408] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.345028] vma_interval_tree_remove+0xc75/0xec0 [ 24.345632] vma_prepare+0xc54/0x11a0 [ 24.346142] __split_vma+0x5af/0x950 [ 24.346616] ? __pfx___split_vma+0x10/0x10 [ 24.347147] ? find_held_lock+0x2c/0x110 [ 24.347672] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.348234] ? lock_is_held_type+0x9f/0x120 [ 24.348779] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.349389] ? mtree_range_walk+0x632/0x900 [ 24.349951] ? mas_walk+0x5c7/0x7c0 [ 24.350435] do_vmi_munmap+0x1f1/0x2b0 [ 24.350924] mmap_region+0x1f9/0x2660 [ 24.351404] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.351918] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.352654] ? __pfx_lock_acquire+0x10/0x10 [ 24.353186] ? __pfx_mmap_region+0x10/0x10 [ 24.353716] ? security_mmap_addr+0x7d/0xa0 [ 24.354269] ? get_unmapped_area+0x1f5/0x3f0 [ 24.354823] do_mmap+0x854/0xf00 [ 24.355264] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.355772] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.356341] ksys_mmap_pgoff+0x3af/0x500 [ 24.356856] do_syscall_64+0x3f/0x90 [ 24.357341] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.358008] RIP: 0033:0x7f954fd15d82 [ 24.358471] 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 [ 24.360612] RSP: 002b:00007fffbdf011d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.361527] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f954fd15d82 [ 24.362387] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f954f14f000 [ 24.363238] RBP: 00007f954f14f000 R08: 0000000000000009 R09: 0000000000001000 [ 24.364095] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560933812ec0 [ 24.364950] R13: 00007fffbdf011f0 R14: 00007fffbdf01220 R15: 00007fffbdf01580 [ 24.365809] [ 24.366122] [ 24.366336] Allocated by task 208: [ 24.366771] kasan_save_stack+0x22/0x50 [ 24.367280] kasan_set_track+0x25/0x30 [ 24.367781] __kasan_slab_alloc+0x59/0x70 [ 24.368306] kmem_cache_alloc+0x16b/0x370 [ 24.368821] vm_area_dup+0x20/0x160 [ 24.369279] __split_vma+0x170/0x950 [ 24.369753] split_vma+0xc6/0x110 [ 24.370200] mprotect_fixup+0x8d2/0xb30 [ 24.370713] do_mprotect_pkey+0x87e/0xd40 [ 24.371239] __x64_sys_mprotect+0x78/0xc0 [ 24.371771] do_syscall_64+0x3f/0x90 [ 24.372254] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.372907] [ 24.373122] Freed by task 208: [ 24.373523] kasan_save_stack+0x22/0x50 [ 24.374037] kasan_set_track+0x25/0x30 [ 24.374542] kasan_save_free_info+0x2b/0x50 [ 24.375079] __kasan_slab_free+0x10a/0x190 [ 24.375619] kmem_cache_free+0x10d/0x4d0 [ 24.376145] rcu_core+0x8c8/0x2860 [ 24.376594] __do_softirq+0x1b7/0x7d4 [ 24.377082] [ 24.377305] Last potentially related work creation: [ 24.377919] kasan_save_stack+0x22/0x50 [ 24.378438] __kasan_record_aux_stack+0x8e/0xa0 [ 24.379016] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.379665] remove_vma+0x139/0x170 [ 24.380122] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.380693] do_vmi_munmap+0x1f1/0x2b0 [ 24.381188] __vm_munmap+0x138/0x3a0 [ 24.381659] __x64_sys_munmap+0x59/0x80 [ 24.382174] do_syscall_64+0x3f/0x90 [ 24.382664] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.383311] [ 24.383530] The buggy address belongs to the object at ffff88801b16d488 [ 24.383530] which belongs to the cache vm_area_struct of size 168 [ 24.385025] The buggy address is located 88 bytes inside of [ 24.385025] freed 168-byte region [ffff88801b16d488, ffff88801b16d530) [ 24.386486] [ 24.386710] The buggy address belongs to the physical page: [ 24.387384] page:00000000a3215740 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b16d [ 24.388505] memcg:ffff88801b161201 [ 24.388936] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.389592] page_type: 0xffffffff() [ 24.390060] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.391001] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b161201 [ 24.391932] page dumped because: kasan: bad access detected [ 24.392616] [ 24.392833] Memory state around the buggy address: [ 24.393418] ffff88801b16d380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.394318] ffff88801b16d400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 24.395186] >ffff88801b16d480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.396053] ^ [ 24.396830] ffff88801b16d500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 24.397715] ffff88801b16d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.398576] ================================================================== [ 24.399553] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.226439] BUG: Bad rss-counter state mm:00000000e7b7b78d type:MM_FILEPAGES val:33 [ 27.227446] BUG: Bad rss-counter state mm:00000000e7b7b78d type:MM_ANONPAGES val:22 [ 27.680404] BUG: Bad rss-counter state mm:000000002bbc8a67 type:MM_FILEPAGES val:33 [ 27.681451] BUG: Bad rss-counter state mm:000000002bbc8a67 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21314' (ECDSA) to the list of known hosts. 2023/06/20 17:51:10 fuzzer started 2023/06/20 17:51:11 dialing manager at localhost:36067 2023/06/20 17:51:11 checking machine... 2023/06/20 17:51:11 checking revisions... [ 28.425809] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:51:11 testing simple program... [ 28.477290] cgroup: Unknown subsys name 'net' [ 28.534000] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:51:10 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff86148ed0 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888019dd77f8 RSP=ffff888019dd7730 R8 =ffffffff86148ed4 R9 =ffff888019dd77e0 R10=0000000000038001 R11=000000000002384c R12=ffff888019dd7800 R13=ffff888019dd77e8 R14=ffff888019dd7c18 R15=ffff888019dd77a0 RIP=ffffffff81130bd6 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 00007f830d3ad900 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=00007ffc6e415000 CR3=000000001b01e000 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=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=00007f028312b790 CR3=000000000973e000 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=2030313a31353a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a31353a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000