syzkaller login: [ 30.772738] BUG: Bad rss-counter state mm:0000000070e8b2e1 type:MM_FILEPAGES val:33 [ 30.773923] BUG: Bad rss-counter state mm:0000000070e8b2e1 type:MM_ANONPAGES val:22 [ 30.813287] ================================================================== [ 30.814301] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.815334] Read of size 8 at addr ffff88800fb14df0 by task sshd/220 [ 30.816159] [ 30.816393] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.817319] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.818363] Call Trace: [ 30.818706] [ 30.819033] dump_stack_lvl+0x91/0xf0 [ 30.819570] print_report+0xcc/0x620 [ 30.820093] ? __virt_addr_valid+0x102/0x340 [ 30.820684] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.821353] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.822013] kasan_report+0xbe/0xf0 [ 30.822531] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.823222] vma_interval_tree_remove+0xc75/0xec0 [ 30.823884] vma_prepare+0xc54/0x11a0 [ 30.824408] __split_vma+0x5af/0x950 [ 30.824924] ? __pfx___split_vma+0x10/0x10 [ 30.825507] ? find_held_lock+0x2c/0x110 [ 30.826116] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.826749] ? lock_is_held_type+0x9f/0x120 [ 30.827372] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.828032] ? mtree_range_walk+0x632/0x900 [ 30.828639] ? mas_walk+0x5c7/0x7c0 [ 30.829160] do_vmi_munmap+0x1f1/0x2b0 [ 30.829695] mmap_region+0x1f9/0x2660 [ 30.830217] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.830783] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.831561] ? __pfx_lock_acquire+0x10/0x10 [ 30.832144] ? __pfx_mmap_region+0x10/0x10 [ 30.832717] ? security_mmap_addr+0x7d/0xa0 [ 30.833288] ? get_unmapped_area+0x1f5/0x3f0 [ 30.833881] do_mmap+0x854/0xf00 [ 30.834356] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.834902] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.835528] ksys_mmap_pgoff+0x3af/0x500 [ 30.836092] do_syscall_64+0x3f/0x90 [ 30.836621] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.837345] RIP: 0033:0x7f5fc6d2ad82 [ 30.837855] 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 [ 30.840218] RSP: 002b:00007ffc71908ff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.841464] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5fc6d2ad82 [ 30.842423] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5fc6164000 [ 30.843395] RBP: 00007f5fc6164000 R08: 0000000000000009 R09: 0000000000001000 [ 30.844333] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559107754f70 [ 30.845267] R13: 00007ffc71909010 R14: 00007ffc71909040 R15: 00007ffc719093a0 [ 30.846222] [ 30.846546] [ 30.846802] Allocated by task 213: [ 30.847281] kasan_save_stack+0x22/0x50 [ 30.847842] kasan_set_track+0x25/0x30 [ 30.848391] __kasan_slab_alloc+0x59/0x70 [ 30.848971] kmem_cache_alloc+0x16b/0x370 [ 30.849546] vm_area_dup+0x20/0x160 [ 30.850054] __split_vma+0x170/0x950 [ 30.850576] split_vma+0xc6/0x110 [ 30.851065] mprotect_fixup+0x8d2/0xb30 [ 30.851625] do_mprotect_pkey+0x87e/0xd40 [ 30.852202] __x64_sys_mprotect+0x78/0xc0 [ 30.852768] do_syscall_64+0x3f/0x90 [ 30.853297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.854010] [ 30.854241] Freed by task 213: [ 30.854661] kasan_save_stack+0x22/0x50 [ 30.855222] kasan_set_track+0x25/0x30 [ 30.855760] kasan_save_free_info+0x2b/0x50 [ 30.856320] __kasan_slab_free+0x10a/0x190 [ 30.856886] kmem_cache_free+0x10d/0x4d0 [ 30.857433] rcu_core+0x8c8/0x2860 [ 30.857899] __do_softirq+0x1b7/0x7d4 [ 30.858404] [ 30.858637] Last potentially related work creation: [ 30.859320] kasan_save_stack+0x22/0x50 [ 30.859855] __kasan_record_aux_stack+0x8e/0xa0 [ 30.860477] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.861167] remove_vma+0x139/0x170 [ 30.861649] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.862252] do_vmi_munmap+0x1f1/0x2b0 [ 30.862785] __vm_munmap+0x138/0x3a0 [ 30.863289] __x64_sys_munmap+0x59/0x80 [ 30.863826] do_syscall_64+0x3f/0x90 [ 30.864330] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.865022] [ 30.865255] The buggy address belongs to the object at ffff88800fb14d98 [ 30.865255] which belongs to the cache vm_area_struct of size 168 [ 30.866842] The buggy address is located 88 bytes inside of [ 30.866842] freed 168-byte region [ffff88800fb14d98, ffff88800fb14e40) [ 30.868341] [ 30.868571] The buggy address belongs to the physical page: [ 30.869277] page:00000000aa358fb1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfb14 [ 30.870436] memcg:ffff88800f0cea01 [ 30.870908] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.871613] page_type: 0xffffffff() [ 30.872102] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.873113] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0cea01 [ 30.874099] page dumped because: kasan: bad access detected [ 30.874838] [ 30.875073] Memory state around the buggy address: [ 30.875707] ffff88800fb14c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.876637] ffff88800fb14d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.877566] >ffff88800fb14d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.878500] ^ [ 30.879384] ffff88800fb14e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.880321] ffff88800fb14e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.881255] ================================================================== [ 30.882339] Disabling lock debugging due to kernel taint [ 32.860645] BUG: Bad rss-counter state mm:00000000adee7dd9 type:MM_FILEPAGES val:33 [ 32.861733] BUG: Bad rss-counter state mm:00000000adee7dd9 type:MM_ANONPAGES val:22 [ 33.409943] BUG: Bad rss-counter state mm:00000000a44e9134 type:MM_FILEPAGES val:33 [ 33.411139] BUG: Bad rss-counter state mm:00000000a44e9134 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1883' (ECDSA) to the list of known hosts. 2023/06/20 14:54:36 fuzzer started 2023/06/20 14:54:36 dialing manager at localhost:36067 2023/06/20 14:54:36 checking machine... 2023/06/20 14:54:36 checking revisions... [ 34.063961] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:54:36 testing simple program... [ 34.119310] cgroup: Unknown subsys name 'net' [ 34.165881] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:54:35 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=00007fb082123aa0 CR3=0000000010260000 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=2035333a34353a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a34353a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=ffffffff863b3c01 RDX=ffff88800fedff48 RSI=0000000000000000 RDI=ffff88806cf09aa8 RBP=ffff88800fed8000 RSP=ffff88806cf09a68 R8 =ffffffff863b3c2a R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000008aa85 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88800fedff40 R15=ffff88806cf09a98 RIP=ffffffff81130930 RFL=00000296 [--S-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 00007f85fb4f9900 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=00007fff98fe5000 CR3=000000000e680000 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=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