syzkaller login: [ 28.728032] BUG: Bad rss-counter state mm:0000000053a0c3b6 type:MM_FILEPAGES val:33 [ 28.729209] BUG: Bad rss-counter state mm:0000000053a0c3b6 type:MM_ANONPAGES val:22 [ 28.889298] ================================================================== [ 28.890209] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.891145] Read of size 8 at addr ffff8880164084e0 by task sshd/219 [ 28.891920] [ 28.892275] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.893165] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.894146] Call Trace: [ 28.894483] [ 28.894768] dump_stack_lvl+0x91/0xf0 [ 28.895259] print_report+0xcc/0x620 [ 28.895745] ? __virt_addr_valid+0x102/0x340 [ 28.896299] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.896938] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.897555] kasan_report+0xbe/0xf0 [ 28.898033] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.898655] vma_interval_tree_remove+0xc75/0xec0 [ 28.899260] vma_prepare+0xc54/0x11a0 [ 28.899741] __split_vma+0x5af/0x950 [ 28.900211] ? __pfx___split_vma+0x10/0x10 [ 28.900750] ? find_held_lock+0x2c/0x110 [ 28.901278] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.901841] ? lock_is_held_type+0x9f/0x120 [ 28.902381] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.902980] ? mtree_range_walk+0x632/0x900 [ 28.903531] ? mas_walk+0x5c7/0x7c0 [ 28.904009] do_vmi_munmap+0x1f1/0x2b0 [ 28.904501] mmap_region+0x1f9/0x2660 [ 28.904992] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.905506] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.906221] ? __pfx_lock_acquire+0x10/0x10 [ 28.906755] ? __pfx_mmap_region+0x10/0x10 [ 28.907282] ? security_mmap_addr+0x7d/0xa0 [ 28.907807] ? get_unmapped_area+0x1f5/0x3f0 [ 28.908352] do_mmap+0x854/0xf00 [ 28.908810] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.909308] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.909871] ksys_mmap_pgoff+0x3af/0x500 [ 28.910380] do_syscall_64+0x3f/0x90 [ 28.910862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.911518] RIP: 0033:0x7f40a8e09d82 [ 28.911975] 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 [ 28.914114] RSP: 002b:00007ffef3d61d28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.915015] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f40a8e09d82 [ 28.915859] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f40a8243000 [ 28.916697] RBP: 00007f40a8243000 R08: 0000000000000009 R09: 0000000000001000 [ 28.917566] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cadceffec0 [ 28.918408] R13: 00007ffef3d61d40 R14: 00007ffef3d61d70 R15: 00007ffef3d620d0 [ 28.919264] [ 28.919553] [ 28.919767] Allocated by task 211: [ 28.920195] kasan_save_stack+0x22/0x50 [ 28.920695] kasan_set_track+0x25/0x30 [ 28.921201] __kasan_slab_alloc+0x59/0x70 [ 28.921727] kmem_cache_alloc+0x16b/0x370 [ 28.922245] vm_area_dup+0x20/0x160 [ 28.922704] __split_vma+0x170/0x950 [ 28.923170] split_vma+0xc6/0x110 [ 28.923607] mprotect_fixup+0x8d2/0xb30 [ 28.924109] do_mprotect_pkey+0x87e/0xd40 [ 28.924624] __x64_sys_mprotect+0x78/0xc0 [ 28.925158] do_syscall_64+0x3f/0x90 [ 28.925634] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.926279] [ 28.926494] Freed by task 19: [ 28.926877] kasan_save_stack+0x22/0x50 [ 28.927376] kasan_set_track+0x25/0x30 [ 28.927874] kasan_save_free_info+0x2b/0x50 [ 28.928405] __kasan_slab_free+0x10a/0x190 [ 28.928955] kmem_cache_free+0x10d/0x4d0 [ 28.929465] rcu_core+0x8c8/0x2860 [ 28.929915] __do_softirq+0x1b7/0x7d4 [ 28.930396] [ 28.930610] Last potentially related work creation: [ 28.931190] kasan_save_stack+0x22/0x50 [ 28.931693] __kasan_record_aux_stack+0x8e/0xa0 [ 28.932266] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.932999] remove_vma+0x139/0x170 [ 28.933455] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.934010] do_vmi_munmap+0x1f1/0x2b0 [ 28.934495] __vm_munmap+0x138/0x3a0 [ 28.934965] __x64_sys_munmap+0x59/0x80 [ 28.935465] do_syscall_64+0x3f/0x90 [ 28.935942] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.936593] [ 28.936824] The buggy address belongs to the object at ffff888016408488 [ 28.936824] which belongs to the cache vm_area_struct of size 168 [ 28.938290] The buggy address is located 88 bytes inside of [ 28.938290] freed 168-byte region [ffff888016408488, ffff888016408530) [ 28.939692] [ 28.939908] The buggy address belongs to the physical page: [ 28.940567] page:0000000086e45704 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16408 [ 28.941729] memcg:ffff888016709501 [ 28.942163] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.942867] page_type: 0xffffffff() [ 28.943319] raw: 0100000000000200 ffff8880087a0c80 ffffea0000376f00 dead000000000007 [ 28.944251] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016709501 [ 28.945179] page dumped because: kasan: bad access detected [ 28.945857] [ 28.946082] Memory state around the buggy address: [ 28.946673] ffff888016408380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 28.947564] ffff888016408400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 28.948425] >ffff888016408480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.949313] ^ [ 28.950091] ffff888016408500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 28.950942] ffff888016408580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.951793] ================================================================== [ 28.952703] Disabling lock debugging due to kernel taint [ 31.502199] BUG: Bad rss-counter state mm:000000003f6fc2d2 type:MM_FILEPAGES val:33 [ 31.503269] BUG: Bad rss-counter state mm:000000003f6fc2d2 type:MM_ANONPAGES val:22 [ 31.910815] BUG: Bad rss-counter state mm:00000000a84e0f50 type:MM_FILEPAGES val:33 [ 31.911590] BUG: Bad rss-counter state mm:00000000a84e0f50 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21980' (ECDSA) to the list of known hosts. 2023/06/20 13:43:47 fuzzer started 2023/06/20 13:43:47 dialing manager at localhost:36067 2023/06/20 13:43:47 checking machine... 2023/06/20 13:43:47 checking revisions... [ 32.661668] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:43:48 testing simple program... [ 32.715806] cgroup: Unknown subsys name 'net' [ 32.754512] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:43:47 Registers: info registers vcpu 0 RAX=1ffffffff0c956dd RBX=0000000000000001 RCX=ffffffff864ab6ea RDX=dffffc0000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888019ef7028 RSP=ffff888019ef6f60 R8 =ffffffff864ab6ee R9 =ffff888019ef7010 R10=0000000000038001 R11=00000000000b3efb R12=ffff888019ef7030 R13=ffff888019ef7018 R14=ffff888019ef76d0 R15=ffff888019ef6fd0 RIP=ffffffff81130b73 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9aea934900 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=00007f9aea8fe008 CR3=000000000ec50000 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=00000000000000000000000000000000 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 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=00007f98718317f0 CR3=000000000f208000 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=66323c869ab1cfb192423fd59422bd7c XMM02=000000000011c848ec2efd57dc4c00df XMM03=0000000000122dc8c2b434f830a3ac27 XMM04=b3b34db5b7c0bb2d00000000000ae988 XMM05=6f6cd9ab559df6fa0000000000133920 XMM06=806171799158d9670000000000133318 XMM07=e042d86d42eb936e00000000001230a0 XMM08=c2b434f830a3ac27000000000011c8a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000