syzkaller login: [ 49.391372] BUG: Bad rss-counter state mm:00000000ab2b0a1c type:MM_FILEPAGES val:33 [ 49.392226] BUG: Bad rss-counter state mm:00000000ab2b0a1c type:MM_ANONPAGES val:22 [ 49.513631] ================================================================== [ 49.514486] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 49.515160] Read of size 8 at addr ffff888015c89310 by task sshd/220 [ 49.515693] [ 49.515845] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 49.516441] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 49.517117] Call Trace: [ 49.517347] [ 49.517527] dump_stack_lvl+0x91/0xf0 [ 49.517893] print_report+0xcc/0x620 [ 49.518461] ? __virt_addr_valid+0x102/0x340 [ 49.518832] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.519240] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.519641] kasan_report+0xbe/0xf0 [ 49.519942] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.520349] vma_interval_tree_remove+0xc75/0xec0 [ 49.520758] vma_prepare+0xc54/0x11a0 [ 49.521079] __split_vma+0x5af/0x950 [ 49.521387] ? __pfx___split_vma+0x10/0x10 [ 49.521824] ? find_held_lock+0x2c/0x110 [ 49.522177] do_vmi_align_munmap+0x2ba/0x11f0 [ 49.522545] ? lock_is_held_type+0x9f/0x120 [ 49.522893] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 49.523280] ? mtree_range_walk+0x632/0x900 [ 49.523636] ? mas_walk+0x5c7/0x7c0 [ 49.523954] do_vmi_munmap+0x1f1/0x2b0 [ 49.524275] mmap_region+0x1f9/0x2660 [ 49.524589] ? vm_mmap_pgoff+0x15c/0x3a0 [ 49.524926] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 49.525396] ? __pfx_lock_acquire+0x10/0x10 [ 49.525785] ? __pfx_mmap_region+0x10/0x10 [ 49.526132] ? security_mmap_addr+0x7d/0xa0 [ 49.526488] ? get_unmapped_area+0x1f5/0x3f0 [ 49.526842] do_mmap+0x854/0xf00 [ 49.527137] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.527458] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 49.527814] ksys_mmap_pgoff+0x3af/0x500 [ 49.528151] do_syscall_64+0x3f/0x90 [ 49.528462] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.528881] RIP: 0033:0x7fcb01c98d82 [ 49.529188] 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 [ 49.530637] RSP: 002b:00007ffcb9e0c3d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 49.531248] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcb01c98d82 [ 49.531822] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcb010d2000 [ 49.532418] RBP: 00007fcb010d2000 R08: 0000000000000009 R09: 0000000000001000 [ 49.533016] R10: 0000000000000812 R11: 0000000000000206 R12: 00005635c37a9ec0 [ 49.533609] R13: 00007ffcb9e0c3f0 R14: 00007ffcb9e0c420 R15: 00007ffcb9e0c780 [ 49.534273] [ 49.534483] [ 49.534638] Allocated by task 213: [ 49.534937] kasan_save_stack+0x22/0x50 [ 49.535285] kasan_set_track+0x25/0x30 [ 49.535613] __kasan_slab_alloc+0x59/0x70 [ 49.535967] kmem_cache_alloc+0x16b/0x370 [ 49.536308] vm_area_dup+0x20/0x160 [ 49.536606] __split_vma+0x170/0x950 [ 49.536907] split_vma+0xc6/0x110 [ 49.537190] mprotect_fixup+0x8d2/0xb30 [ 49.537518] do_mprotect_pkey+0x87e/0xd40 [ 49.537894] __x64_sys_mprotect+0x78/0xc0 [ 49.538232] do_syscall_64+0x3f/0x90 [ 49.538540] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.538975] [ 49.539115] Freed by task 213: [ 49.539380] kasan_save_stack+0x22/0x50 [ 49.539708] kasan_set_track+0x25/0x30 [ 49.540026] kasan_save_free_info+0x2b/0x50 [ 49.540375] __kasan_slab_free+0x10a/0x190 [ 49.540730] kmem_cache_free+0x10d/0x4d0 [ 49.541058] rcu_core+0x8c8/0x2860 [ 49.541350] __do_softirq+0x1b7/0x7d4 [ 49.541724] [ 49.541881] Last potentially related work creation: [ 49.542282] kasan_save_stack+0x22/0x50 [ 49.542606] __kasan_record_aux_stack+0x8e/0xa0 [ 49.542979] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.543398] remove_vma+0x139/0x170 [ 49.543695] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.544064] do_vmi_munmap+0x1f1/0x2b0 [ 49.544395] __vm_munmap+0x138/0x3a0 [ 49.544699] __x64_sys_munmap+0x59/0x80 [ 49.545020] do_syscall_64+0x3f/0x90 [ 49.545337] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.545806] [ 49.545948] The buggy address belongs to the object at ffff888015c892b8 [ 49.545948] which belongs to the cache vm_area_struct of size 168 [ 49.546940] The buggy address is located 88 bytes inside of [ 49.546940] freed 168-byte region [ffff888015c892b8, ffff888015c89360) [ 49.547904] [ 49.548053] The buggy address belongs to the physical page: [ 49.548504] page:00000000108a73ac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15c89 [ 49.549235] memcg:ffff888015c8a001 [ 49.549525] flags: 0x100000000000200(slab|node=0|zone=1) [ 49.550015] page_type: 0xffffffff() [ 49.550318] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 49.550934] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015c8a001 [ 49.551536] page dumped because: kasan: bad access detected [ 49.551983] [ 49.552123] Memory state around the buggy address: [ 49.552526] ffff888015c89200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 49.553122] ffff888015c89280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 49.553788] >ffff888015c89300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 49.554390] ^ [ 49.554714] ffff888015c89380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 49.555315] ffff888015c89400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 49.555937] ================================================================== [ 49.557127] Disabling lock debugging due to kernel taint [ 50.959971] BUG: Bad rss-counter state mm:00000000fb6f2654 type:MM_FILEPAGES val:33 [ 50.960672] BUG: Bad rss-counter state mm:00000000fb6f2654 type:MM_ANONPAGES val:22 [ 51.329387] BUG: Bad rss-counter state mm:000000001f6d52e4 type:MM_FILEPAGES val:33 [ 51.330348] BUG: Bad rss-counter state mm:000000001f6d52e4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44148' (ECDSA) to the list of known hosts. 2023/06/20 09:27:32 fuzzer started 2023/06/20 09:27:32 dialing manager at localhost:44161 2023/06/20 09:27:32 checking machine... 2023/06/20 09:27:32 checking revisions... [ 51.925102] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:27:33 testing simple program... [ 51.958096] cgroup: Unknown subsys name 'net' [ 51.992996] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:27:13 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f3196376610 CR3=00000000097ce000 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=d6ee1cc3d0ccbbaf0948d6e0726031b1 XMM02=ec2efd57dc4c00df000000000011d2d8 XMM03=f21c16349ef24d94000000000011d3a8 XMM04=d9f49072016e5c3100000000000ae988 XMM05=19e9129bd510f2350000000000133bd8 XMM06=1d230eb970ed6e9a0000000000132a40 XMM07=e042d86d42eb936e0000000000124370 XMM08=f21c16349ef24d94000000000011d3a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81802eb3 RBX=0000000000000001 RCX=ffffffff861371f0 RDX=dffffc0000000000 RSI=1ffff11000d16ecd RDI=1ffff11000d16ecd RBP=ffff8880068b7668 RSP=ffff8880068b75a0 R8 =ffffffff861371f4 R9 =ffff8880068b7650 R10=0000000000038001 R11=0000000000020d06 R12=ffff8880068b7670 R13=ffff8880068b7658 R14=ffff8880068b7a10 R15=ffff8880068b7610 RIP=ffffffff81131090 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 00007f9dd8911900 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=00007ffe2a56b000 CR3=000000000d722000 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