syzkaller login: [ 35.189920] BUG: Bad rss-counter state mm:00000000f6c4821f type:MM_FILEPAGES val:33 [ 35.191342] BUG: Bad rss-counter state mm:00000000f6c4821f type:MM_ANONPAGES val:22 [ 35.341633] ================================================================== [ 35.342677] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.343753] Read of size 8 at addr ffff88800dafbed8 by task sshd/218 [ 35.344784] [ 35.345038] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.346022] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.347147] Call Trace: [ 35.347507] [ 35.347840] dump_stack_lvl+0x91/0xf0 [ 35.348393] print_report+0xcc/0x620 [ 35.348959] ? __virt_addr_valid+0x102/0x340 [ 35.349580] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.350298] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.351047] kasan_report+0xbe/0xf0 [ 35.351583] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.352226] vma_interval_tree_remove+0xc75/0xec0 [ 35.352850] vma_prepare+0xc54/0x11a0 [ 35.353328] __split_vma+0x5af/0x950 [ 35.353845] ? __pfx___split_vma+0x10/0x10 [ 35.354375] ? find_held_lock+0x2c/0x110 [ 35.354950] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.355522] ? lock_is_held_type+0x9f/0x120 [ 35.356083] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.356699] ? mtree_range_walk+0x632/0x900 [ 35.357277] ? mas_walk+0x5c7/0x7c0 [ 35.357768] do_vmi_munmap+0x1f1/0x2b0 [ 35.358285] mmap_region+0x1f9/0x2660 [ 35.358790] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.359323] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.360070] ? __pfx_lock_acquire+0x10/0x10 [ 35.360607] ? __pfx_mmap_region+0x10/0x10 [ 35.361164] ? security_mmap_addr+0x7d/0xa0 [ 35.361703] ? get_unmapped_area+0x1f5/0x3f0 [ 35.362278] do_mmap+0x854/0xf00 [ 35.362722] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.363258] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.363837] ksys_mmap_pgoff+0x3af/0x500 [ 35.364353] do_syscall_64+0x3f/0x90 [ 35.364867] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.365532] RIP: 0033:0x7f06c3448d82 [ 35.366020] 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 [ 35.368196] RSP: 002b:00007ffc2656b578 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.369121] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f06c3448d82 [ 35.370004] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f06c2882000 [ 35.370893] RBP: 00007f06c2882000 R08: 0000000000000009 R09: 0000000000001000 [ 35.371765] R10: 0000000000000812 R11: 0000000000000206 R12: 000055db6f172ec0 [ 35.372625] R13: 00007ffc2656b590 R14: 00007ffc2656b5c0 R15: 00007ffc2656b920 [ 35.373508] [ 35.373828] [ 35.374046] Allocated by task 211: [ 35.374478] kasan_save_stack+0x22/0x50 [ 35.375022] kasan_set_track+0x25/0x30 [ 35.375522] __kasan_slab_alloc+0x59/0x70 [ 35.376061] kmem_cache_alloc+0x16b/0x370 [ 35.376584] vm_area_dup+0x20/0x160 [ 35.377055] __split_vma+0x170/0x950 [ 35.377527] split_vma+0xc6/0x110 [ 35.377994] mprotect_fixup+0x8d2/0xb30 [ 35.378512] do_mprotect_pkey+0x87e/0xd40 [ 35.379066] __x64_sys_mprotect+0x78/0xc0 [ 35.379585] do_syscall_64+0x3f/0x90 [ 35.380076] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.380722] [ 35.380948] Freed by task 211: [ 35.381348] kasan_save_stack+0x22/0x50 [ 35.381889] kasan_set_track+0x25/0x30 [ 35.382384] kasan_save_free_info+0x2b/0x50 [ 35.382963] __kasan_slab_free+0x10a/0x190 [ 35.383518] kmem_cache_free+0x10d/0x4d0 [ 35.384054] rcu_core+0x8c8/0x2860 [ 35.384501] __do_softirq+0x1b7/0x7d4 [ 35.385001] [ 35.385218] Last potentially related work creation: [ 35.385828] kasan_save_stack+0x22/0x50 [ 35.386343] __kasan_record_aux_stack+0x8e/0xa0 [ 35.386947] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.387610] remove_vma+0x139/0x170 [ 35.388080] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.388643] do_vmi_munmap+0x1f1/0x2b0 [ 35.389151] __vm_munmap+0x138/0x3a0 [ 35.389622] __x64_sys_munmap+0x59/0x80 [ 35.390142] do_syscall_64+0x3f/0x90 [ 35.390624] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.391308] [ 35.391523] Second to last potentially related work creation: [ 35.392221] kasan_save_stack+0x22/0x50 [ 35.392732] __kasan_record_aux_stack+0x8e/0xa0 [ 35.393335] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.394013] remove_vma+0x139/0x170 [ 35.394470] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.395072] do_vmi_munmap+0x1f1/0x2b0 [ 35.395580] __vm_munmap+0x138/0x3a0 [ 35.396068] __x64_sys_munmap+0x59/0x80 [ 35.396579] do_syscall_64+0x3f/0x90 [ 35.397070] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.397728] [ 35.397964] The buggy address belongs to the object at ffff88800dafbe80 [ 35.397964] which belongs to the cache vm_area_struct of size 168 [ 35.399485] The buggy address is located 88 bytes inside of [ 35.399485] freed 168-byte region [ffff88800dafbe80, ffff88800dafbf28) [ 35.400921] [ 35.401143] The buggy address belongs to the physical page: [ 35.401840] page:00000000281abb2b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdafb [ 35.402980] memcg:ffff88800e214a01 [ 35.403411] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.404079] page_type: 0xffffffff() [ 35.404540] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a7480 dead000000000002 [ 35.405493] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e214a01 [ 35.406444] page dumped because: kasan: bad access detected [ 35.407147] [ 35.407365] Memory state around the buggy address: [ 35.407960] ffff88800dafbd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.408862] ffff88800dafbe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 35.409730] >ffff88800dafbe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.410609] ^ [ 35.411381] ffff88800dafbf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 35.412271] ffff88800dafbf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.413193] ================================================================== [ 35.414249] Disabling lock debugging due to kernel taint [ 37.238437] BUG: Bad rss-counter state mm:000000008594e31d type:MM_FILEPAGES val:33 [ 37.239516] BUG: Bad rss-counter state mm:000000008594e31d type:MM_ANONPAGES val:22 [ 37.664051] BUG: Bad rss-counter state mm:000000000eadbadf type:MM_FILEPAGES val:33 [ 37.665312] BUG: Bad rss-counter state mm:000000000eadbadf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56875' (ECDSA) to the list of known hosts. 2023/06/20 16:42:33 fuzzer started 2023/06/20 16:42:33 dialing manager at localhost:36067 2023/06/20 16:42:33 checking machine... 2023/06/20 16:42:33 checking revisions... [ 38.373882] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:42:33 testing simple program... [ 38.428293] cgroup: Unknown subsys name 'net' [ 38.485291] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:42:33 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=00007fb440fbf008 CR3=000000000d788000 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=f4a60ffedb6e3a9dc5458046350ce806 XMM02=000000000011b020eff9b2d0a8fce9cb XMM03=000000000011b0f02c67c8bc2e329bc3 XMM04=1ab171b4deb7f75b00000000000ae988 XMM05=6447811805c7f5750000000000133770 XMM06=bdf2e299e47b49d500000000001324a0 XMM07=e042d86d42eb936e0000000000121d08 XMM08=fdba7ccff2d5a9d2000000000011b0f0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888016873680 RCX=0000000000000000 RDX=1ffff11002d0e765 RSI=ffffffff81704d17 RDI=ffff888016873b28 RBP=ffffffff849f0540 RSP=ffff88801688fc70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000024 R13=000000000000000c R14=ffff88801688fe10 R15=00007ffc964fdd4c RIP=ffffffff81704d3c 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 00007ff803fa9900 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=00007ffc964ff000 CR3=000000000d9d8000 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=6720646572637465733a4d41503d706f 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