syzkaller login: [ 23.854761] BUG: Bad rss-counter state mm:000000003a941fbe type:MM_FILEPAGES val:33 [ 23.856040] BUG: Bad rss-counter state mm:000000003a941fbe type:MM_ANONPAGES val:22 [ 23.900374] ================================================================== [ 23.901296] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.902232] Read of size 8 at addr ffff88800dfc03f8 by task sshd/218 [ 23.903002] [ 23.903221] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.904283] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.905264] Call Trace: [ 23.905585] [ 23.905877] dump_stack_lvl+0x91/0xf0 [ 23.906371] print_report+0xcc/0x620 [ 23.906870] ? __virt_addr_valid+0x102/0x340 [ 23.907447] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.908075] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.908687] kasan_report+0xbe/0xf0 [ 23.909179] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.909804] vma_interval_tree_remove+0xc75/0xec0 [ 23.910411] vma_prepare+0xc54/0x11a0 [ 23.910890] __split_vma+0x5af/0x950 [ 23.911373] ? __pfx___split_vma+0x10/0x10 [ 23.911914] ? find_held_lock+0x2c/0x110 [ 23.912435] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.913008] ? lock_is_held_type+0x9f/0x120 [ 23.913555] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.914172] ? mtree_range_walk+0x632/0x900 [ 23.914727] ? mas_walk+0x5c7/0x7c0 [ 23.915208] do_vmi_munmap+0x1f1/0x2b0 [ 23.915751] mmap_region+0x1f9/0x2660 [ 23.916243] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.916758] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.917482] ? __pfx_lock_acquire+0x10/0x10 [ 23.918018] ? __pfx_mmap_region+0x10/0x10 [ 23.918552] ? security_mmap_addr+0x7d/0xa0 [ 23.919081] ? get_unmapped_area+0x1f5/0x3f0 [ 23.919651] do_mmap+0x854/0xf00 [ 23.920094] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.920589] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.921154] ksys_mmap_pgoff+0x3af/0x500 [ 23.921663] do_syscall_64+0x3f/0x90 [ 23.922145] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.922794] RIP: 0033:0x7f5459956d82 [ 23.923253] 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 [ 23.925417] RSP: 002b:00007ffe71bd5b78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.926337] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5459956d82 [ 23.927195] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5458d90000 [ 23.928046] RBP: 00007f5458d90000 R08: 0000000000000009 R09: 0000000000001000 [ 23.928883] R10: 0000000000000812 R11: 0000000000000206 R12: 00005587f7480ec0 [ 23.929731] R13: 00007ffe71bd5b90 R14: 00007ffe71bd5bc0 R15: 00007ffe71bd5f20 [ 23.930586] [ 23.930874] [ 23.931087] Allocated by task 211: [ 23.931528] kasan_save_stack+0x22/0x50 [ 23.932039] kasan_set_track+0x25/0x30 [ 23.932535] __kasan_slab_alloc+0x59/0x70 [ 23.933064] kmem_cache_alloc+0x16b/0x370 [ 23.933583] vm_area_dup+0x20/0x160 [ 23.934042] __split_vma+0x170/0x950 [ 23.934511] split_vma+0xc6/0x110 [ 23.934952] mprotect_fixup+0x8d2/0xb30 [ 23.935481] do_mprotect_pkey+0x87e/0xd40 [ 23.936009] __x64_sys_mprotect+0x78/0xc0 [ 23.936527] do_syscall_64+0x3f/0x90 [ 23.936997] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.937636] [ 23.937853] Freed by task 211: [ 23.938240] kasan_save_stack+0x22/0x50 [ 23.938742] kasan_set_track+0x25/0x30 [ 23.939238] kasan_save_free_info+0x2b/0x50 [ 23.939783] __kasan_slab_free+0x10a/0x190 [ 23.940317] kmem_cache_free+0x10d/0x4d0 [ 23.940832] rcu_core+0x8c8/0x2860 [ 23.941282] __do_softirq+0x1b7/0x7d4 [ 23.941758] [ 23.941975] Last potentially related work creation: [ 23.942571] kasan_save_stack+0x22/0x50 [ 23.943076] __kasan_record_aux_stack+0x8e/0xa0 [ 23.943658] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.944308] remove_vma+0x139/0x170 [ 23.944765] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.945335] do_vmi_munmap+0x1f1/0x2b0 [ 23.945826] __vm_munmap+0x138/0x3a0 [ 23.946297] __x64_sys_munmap+0x59/0x80 [ 23.946798] do_syscall_64+0x3f/0x90 [ 23.947275] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.947950] [ 23.948170] The buggy address belongs to the object at ffff88800dfc03a0 [ 23.948170] which belongs to the cache vm_area_struct of size 168 [ 23.949653] The buggy address is located 88 bytes inside of [ 23.949653] freed 168-byte region [ffff88800dfc03a0, ffff88800dfc0448) [ 23.951063] [ 23.951284] The buggy address belongs to the physical page: [ 23.951959] page:000000005489af5c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfc0 [ 23.953046] memcg:ffff8880094de901 [ 23.953473] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.954177] page_type: 0xffffffff() [ 23.954636] raw: 0100000000000200 ffff8880087a0c80 ffffea0000581f00 dead000000000005 [ 23.955570] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880094de901 [ 23.956487] page dumped because: kasan: bad access detected [ 23.957157] [ 23.957375] Memory state around the buggy address: [ 23.957960] ffff88800dfc0280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 23.958833] ffff88800dfc0300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 23.959717] >ffff88800dfc0380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 23.960580] ^ [ 23.961439] ffff88800dfc0400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 23.962311] ffff88800dfc0480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.963166] ================================================================== [ 23.964337] Disabling lock debugging due to kernel taint [ 25.988825] BUG: Bad rss-counter state mm:0000000050acbd3b type:MM_FILEPAGES val:33 [ 25.990199] BUG: Bad rss-counter state mm:0000000050acbd3b type:MM_ANONPAGES val:22 [ 26.479891] BUG: Bad rss-counter state mm:00000000c2a80dfa type:MM_FILEPAGES val:33 [ 26.481289] BUG: Bad rss-counter state mm:00000000c2a80dfa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60677' (ECDSA) to the list of known hosts. 2023/06/20 17:30:14 fuzzer started 2023/06/20 17:30:14 dialing manager at localhost:36067 2023/06/20 17:30:14 checking machine... 2023/06/20 17:30:14 checking revisions... [ 27.230433] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:30:15 testing simple program... [ 27.273476] cgroup: Unknown subsys name 'net' [ 27.317033] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:30:14 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800cb9f938 RCX=0000000000000001 RDX=1ffff11001973f29 RSI=ffff88800cb9f908 RDI=ffff88800cb9f948 RBP=ffff88800cb9f908 RSP=ffff88800cb9f840 R8 =0000000000000001 R9 =ffff88800cb9f978 R10=0000000000038001 R11=0000000000006097 R12=0000000000000008 R13=ffff88800cb98000 R14=ffff88800cb9f908 R15=ffff88800cb9f938 RIP=ffffffff81130468 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 00007f2a467c5900 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=00007ffe79d99000 CR3=000000000f682000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=ffff888008c04400 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=00007f8198c5e810 CR3=000000000d716000 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=bbc027dc0efca4bd67484995b98ad286 XMM02=ec2efd57dc4c00df000000000011a790 XMM03=6a0a547bf7e1d40f000000000011a860 XMM04=d6bdc3039b7e4e2500000000000ae988 XMM05=19e9129bd510f2350000000000131550 XMM06=4fda316b135da52b00000000001313d8 XMM07=e042d86d42eb936e0000000000121928 XMM08=6a0a547bf7e1d40f000000000011a860 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000