syzkaller login: [ 31.129097] BUG: Bad rss-counter state mm:00000000e985568c type:MM_FILEPAGES val:33 [ 31.130175] BUG: Bad rss-counter state mm:00000000e985568c type:MM_ANONPAGES val:22 [ 31.168953] ================================================================== [ 31.169896] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.170829] Read of size 8 at addr ffff88801a0be3f8 by task sshd/220 [ 31.171607] [ 31.171827] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.172712] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.173687] Call Trace: [ 31.174020] [ 31.174306] dump_stack_lvl+0x91/0xf0 [ 31.174799] print_report+0xcc/0x620 [ 31.175289] ? __virt_addr_valid+0x102/0x340 [ 31.175852] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.176497] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.177115] kasan_report+0xbe/0xf0 [ 31.177604] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.178228] vma_interval_tree_remove+0xc75/0xec0 [ 31.178831] vma_prepare+0xc54/0x11a0 [ 31.179314] __split_vma+0x5af/0x950 [ 31.179789] ? __pfx___split_vma+0x10/0x10 [ 31.180330] ? find_held_lock+0x2c/0x110 [ 31.180862] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.181433] ? lock_is_held_type+0x9f/0x120 [ 31.181977] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.182580] ? mtree_range_walk+0x632/0x900 [ 31.183136] ? mas_walk+0x5c7/0x7c0 [ 31.183611] do_vmi_munmap+0x1f1/0x2b0 [ 31.184103] mmap_region+0x1f9/0x2660 [ 31.184597] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.185117] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.185837] ? __pfx_lock_acquire+0x10/0x10 [ 31.186375] ? __pfx_mmap_region+0x10/0x10 [ 31.186905] ? security_mmap_addr+0x7d/0xa0 [ 31.187439] ? get_unmapped_area+0x1f5/0x3f0 [ 31.187991] do_mmap+0x854/0xf00 [ 31.188450] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.188945] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.189516] ksys_mmap_pgoff+0x3af/0x500 [ 31.190035] do_syscall_64+0x3f/0x90 [ 31.190521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.191180] RIP: 0033:0x7fb82ea49d82 [ 31.191638] 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 [ 31.193772] RSP: 002b:00007ffe95317748 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.194696] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb82ea49d82 [ 31.195747] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb82de83000 [ 31.196608] RBP: 00007fb82de83000 R08: 0000000000000009 R09: 0000000000001000 [ 31.197451] R10: 0000000000000812 R11: 0000000000000206 R12: 000055908cedfec0 [ 31.198326] R13: 00007ffe95317760 R14: 00007ffe95317790 R15: 00007ffe95317af0 [ 31.199187] [ 31.199476] [ 31.199693] Allocated by task 213: [ 31.200128] kasan_save_stack+0x22/0x50 [ 31.200640] kasan_set_track+0x25/0x30 [ 31.201133] __kasan_slab_alloc+0x59/0x70 [ 31.201656] kmem_cache_alloc+0x16b/0x370 [ 31.202173] vm_area_dup+0x20/0x160 [ 31.202626] __split_vma+0x170/0x950 [ 31.203120] split_vma+0xc6/0x110 [ 31.203562] mprotect_fixup+0x8d2/0xb30 [ 31.204063] do_mprotect_pkey+0x87e/0xd40 [ 31.204594] __x64_sys_mprotect+0x78/0xc0 [ 31.205119] do_syscall_64+0x3f/0x90 [ 31.205601] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.206248] [ 31.206463] Freed by task 213: [ 31.206866] kasan_save_stack+0x22/0x50 [ 31.207362] kasan_set_track+0x25/0x30 [ 31.207857] kasan_save_free_info+0x2b/0x50 [ 31.208410] __kasan_slab_free+0x10a/0x190 [ 31.208955] kmem_cache_free+0x10d/0x4d0 [ 31.209468] rcu_core+0x8c8/0x2860 [ 31.209908] __do_softirq+0x1b7/0x7d4 [ 31.210385] [ 31.210598] Last potentially related work creation: [ 31.211181] kasan_save_stack+0x22/0x50 [ 31.211705] __kasan_record_aux_stack+0x8e/0xa0 [ 31.212303] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.212994] remove_vma+0x139/0x170 [ 31.213474] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.214056] do_vmi_munmap+0x1f1/0x2b0 [ 31.214561] __vm_munmap+0x138/0x3a0 [ 31.215054] __x64_sys_munmap+0x59/0x80 [ 31.215577] do_syscall_64+0x3f/0x90 [ 31.216075] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.216771] [ 31.216993] The buggy address belongs to the object at ffff88801a0be3a0 [ 31.216993] which belongs to the cache vm_area_struct of size 168 [ 31.218555] The buggy address is located 88 bytes inside of [ 31.218555] freed 168-byte region [ffff88801a0be3a0, ffff88801a0be448) [ 31.220031] [ 31.220255] The buggy address belongs to the physical page: [ 31.220972] page:00000000b4e4486e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a0be [ 31.222141] memcg:ffff888009a92601 [ 31.222593] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.223281] page_type: 0xffffffff() [ 31.223752] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.224741] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a92601 [ 31.225714] page dumped because: kasan: bad access detected [ 31.226412] [ 31.226638] Memory state around the buggy address: [ 31.227256] ffff88801a0be280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.228162] ffff88801a0be300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.229075] >ffff88801a0be380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.229987] ^ [ 31.230886] ffff88801a0be400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.231787] ffff88801a0be480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.232697] ================================================================== [ 31.234055] Disabling lock debugging due to kernel taint [ 33.189345] BUG: Bad rss-counter state mm:00000000bfc979c3 type:MM_FILEPAGES val:33 [ 33.190230] BUG: Bad rss-counter state mm:00000000bfc979c3 type:MM_ANONPAGES val:22 [ 33.671588] BUG: Bad rss-counter state mm:00000000d87e0e0c type:MM_FILEPAGES val:33 [ 33.672863] BUG: Bad rss-counter state mm:00000000d87e0e0c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4926' (ECDSA) to the list of known hosts. 2023/06/21 00:41:13 fuzzer started 2023/06/21 00:41:13 dialing manager at localhost:36067 2023/06/21 00:41:13 checking machine... 2023/06/21 00:41:13 checking revisions... [ 34.427895] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:41:13 testing simple program... [ 34.472110] cgroup: Unknown subsys name 'net' [ 34.511887] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:41:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652c08 RCX=0000000000000100 RDX=ffff88800cc63680 RSI=ffffffff814c855d RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09a08 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=ffff88800cf20e00 RIP=ffffffff814c8562 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 00007f7f53550900 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=00007ffebff7a000 CR3=000000001a354000 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=00007f41f4c62f10 CR3=000000000e34e000 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=d22365dae6a90abd784bfb77d2203a31 XMM02=000000000011dac0ec2efd57dc4c00df XMM03=0000000000122188b709d2768180e2ca XMM04=dfa89c52ce2d83a500000000000ae988 XMM05=31071334f6f38cd50000000000132dc0 XMM06=4fda316b135da52b0000000000131e60 XMM07=e042d86d42eb936e0000000000122408 XMM08=b709d2768180e2ca000000000011db20 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000