syzkaller login: [ 60.889096] BUG: Bad rss-counter state mm:00000000fdf4f764 type:MM_FILEPAGES val:33 [ 60.890313] BUG: Bad rss-counter state mm:00000000fdf4f764 type:MM_ANONPAGES val:22 [ 60.927899] ================================================================== [ 60.928922] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.929870] Read of size 8 at addr ffff88800e9495c8 by task sshd/219 [ 60.930722] [ 60.930940] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.931836] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.932828] Call Trace: [ 60.933158] [ 60.933446] dump_stack_lvl+0x91/0xf0 [ 60.933948] print_report+0xcc/0x620 [ 60.934437] ? __virt_addr_valid+0x102/0x340 [ 60.934995] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.935629] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.936257] kasan_report+0xbe/0xf0 [ 60.936734] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.937360] vma_interval_tree_remove+0xc75/0xec0 [ 60.937972] vma_prepare+0xc54/0x11a0 [ 60.938458] __split_vma+0x5af/0x950 [ 60.938935] ? __pfx___split_vma+0x10/0x10 [ 60.939496] ? find_held_lock+0x2c/0x110 [ 60.940018] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.940587] ? lock_is_held_type+0x9f/0x120 [ 60.941134] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.941743] ? mtree_range_walk+0x632/0x900 [ 60.942302] ? mas_walk+0x5c7/0x7c0 [ 60.942780] do_vmi_munmap+0x1f1/0x2b0 [ 60.943288] mmap_region+0x1f9/0x2660 [ 60.943783] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.944307] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.945035] ? __pfx_lock_acquire+0x10/0x10 [ 60.945573] ? __pfx_mmap_region+0x10/0x10 [ 60.946106] ? security_mmap_addr+0x7d/0xa0 [ 60.946648] ? get_unmapped_area+0x1f5/0x3f0 [ 60.947219] do_mmap+0x854/0xf00 [ 60.947665] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.948172] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.948741] ksys_mmap_pgoff+0x3af/0x500 [ 60.949257] do_syscall_64+0x3f/0x90 [ 60.949751] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.950411] RIP: 0033:0x7f808ff2ed82 [ 60.950871] 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 [ 60.953057] RSP: 002b:00007ffd909abe38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.954087] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f808ff2ed82 [ 60.954919] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f808f368000 [ 60.955754] RBP: 00007f808f368000 R08: 0000000000000009 R09: 0000000000001000 [ 60.956598] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f432b1bf70 [ 60.957434] R13: 00007ffd909abe50 R14: 00007ffd909abe80 R15: 00007ffd909ac1e0 [ 60.958282] [ 60.958568] [ 60.958778] Allocated by task 212: [ 60.959224] kasan_save_stack+0x22/0x50 [ 60.959715] kasan_set_track+0x25/0x30 [ 60.960195] __kasan_slab_alloc+0x59/0x70 [ 60.960714] kmem_cache_alloc+0x16b/0x370 [ 60.961226] vm_area_dup+0x20/0x160 [ 60.961684] __split_vma+0x170/0x950 [ 60.962140] split_vma+0xc6/0x110 [ 60.962569] mprotect_fixup+0x8d2/0xb30 [ 60.963076] do_mprotect_pkey+0x87e/0xd40 [ 60.963591] __x64_sys_mprotect+0x78/0xc0 [ 60.964107] do_syscall_64+0x3f/0x90 [ 60.964580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.965222] [ 60.965433] Freed by task 212: [ 60.965830] kasan_save_stack+0x22/0x50 [ 60.966327] kasan_set_track+0x25/0x30 [ 60.966818] kasan_save_free_info+0x2b/0x50 [ 60.967361] __kasan_slab_free+0x10a/0x190 [ 60.967891] kmem_cache_free+0x10d/0x4d0 [ 60.968393] rcu_core+0x8c8/0x2860 [ 60.968838] __do_softirq+0x1b7/0x7d4 [ 60.969310] [ 60.969527] Last potentially related work creation: [ 60.970102] kasan_save_stack+0x22/0x50 [ 60.970604] __kasan_record_aux_stack+0x8e/0xa0 [ 60.971176] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.971817] remove_vma+0x139/0x170 [ 60.972263] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.972818] do_vmi_munmap+0x1f1/0x2b0 [ 60.973302] __vm_munmap+0x138/0x3a0 [ 60.973764] __x64_sys_munmap+0x59/0x80 [ 60.974259] do_syscall_64+0x3f/0x90 [ 60.974728] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.975367] [ 60.975579] Second to last potentially related work creation: [ 60.976256] kasan_save_stack+0x22/0x50 [ 60.976757] __kasan_record_aux_stack+0x8e/0xa0 [ 60.977318] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.977954] remove_vma+0x139/0x170 [ 60.978402] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.978956] do_vmi_munmap+0x1f1/0x2b0 [ 60.979456] mmap_region+0x1f9/0x2660 [ 60.979932] do_mmap+0x854/0xf00 [ 60.980359] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.980843] ksys_mmap_pgoff+0x3af/0x500 [ 60.981335] do_syscall_64+0x3f/0x90 [ 60.981808] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.982450] [ 60.982665] The buggy address belongs to the object at ffff88800e949570 [ 60.982665] which belongs to the cache vm_area_struct of size 168 [ 60.984120] The buggy address is located 88 bytes inside of [ 60.984120] freed 168-byte region [ffff88800e949570, ffff88800e949618) [ 60.985516] [ 60.985731] The buggy address belongs to the physical page: [ 60.986385] page:000000004d09372c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe949 [ 60.987471] memcg:ffff88800eb1fc01 [ 60.987915] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 60.988658] page_type: 0xffffffff() [ 60.989177] raw: 0100000000000200 ffff8880087a0c80 ffffea00003d4980 dead000000000003 [ 60.990245] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb1fc01 [ 60.991358] page dumped because: kasan: bad access detected [ 60.992172] [ 60.992429] Memory state around the buggy address: [ 60.993138] ffff88800e949480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.994185] ffff88800e949500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 60.995261] >ffff88800e949580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.996315] ^ [ 60.997125] ffff88800e949600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 60.998171] ffff88800e949680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.999197] ================================================================== [ 61.000439] Disabling lock debugging due to kernel taint [ 62.954279] BUG: Bad rss-counter state mm:00000000615df554 type:MM_FILEPAGES val:33 [ 62.955635] BUG: Bad rss-counter state mm:00000000615df554 type:MM_ANONPAGES val:22 [ 63.528468] BUG: Bad rss-counter state mm:000000002f0832f9 type:MM_FILEPAGES val:33 [ 63.529642] BUG: Bad rss-counter state mm:000000002f0832f9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32297' (ECDSA) to the list of known hosts. 2023/06/20 23:06:08 fuzzer started 2023/06/20 23:06:08 dialing manager at localhost:36067 2023/06/20 23:06:08 checking machine... 2023/06/20 23:06:08 checking revisions... [ 64.157058] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:06:08 testing simple program... [ 64.214902] cgroup: Unknown subsys name 'net' [ 64.252739] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:06:08 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fe912fb3aa0 CR3=000000000d5e6000 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=2038303a36303a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a36303a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffea00005f3180 RCX=0000000000000100 RDX=ffff88800844f780 RSI=ffffffff811431c2 RDI=0000777f80000000 RBP=0000000000000000 RSP=ffff88806cf09db0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000008 R11=00000000000b6a61 R12=ffffffff81845e00 R13=ffffea0000647c80 R14=ffffffff813782f8 R15=ffff88800c38b200 RIP=ffffffff8180c61b RFL=00000282 [--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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f335d316900 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=00007f335d2db008 CR3=000000000fc44000 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=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