syzkaller login: [ 31.325847] BUG: Bad rss-counter state mm:00000000891d735f type:MM_FILEPAGES val:33 [ 31.327438] BUG: Bad rss-counter state mm:00000000891d735f type:MM_ANONPAGES val:22 [ 31.497927] ================================================================== [ 31.498525] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.499142] Read of size 8 at addr ffff88800f017880 by task sshd/224 [ 31.499641] [ 31.499787] CPU: 1 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.500347] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.501908] Call Trace: [ 31.502124] [ 31.502314] dump_stack_lvl+0x91/0xf0 [ 31.502696] print_report+0xcc/0x620 [ 31.503020] ? __virt_addr_valid+0x102/0x340 [ 31.503384] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.503840] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.504245] kasan_report+0xbe/0xf0 [ 31.504633] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.505648] vma_interval_tree_remove+0xc75/0xec0 [ 31.506045] vma_prepare+0xc54/0x11a0 [ 31.506363] __split_vma+0x5af/0x950 [ 31.506727] ? __pfx___split_vma+0x10/0x10 [ 31.507076] ? find_held_lock+0x2c/0x110 [ 31.507419] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.507838] ? lock_is_held_type+0x9f/0x120 [ 31.508194] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.508669] ? mtree_range_walk+0x632/0x900 [ 31.509173] ? mas_walk+0x5c7/0x7c0 [ 31.509496] do_vmi_munmap+0x1f1/0x2b0 [ 31.509869] mmap_region+0x1f9/0x2660 [ 31.510188] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.510525] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.511046] ? __pfx_lock_acquire+0x10/0x10 [ 31.511399] ? __pfx_mmap_region+0x10/0x10 [ 31.511798] ? security_mmap_addr+0x7d/0xa0 [ 31.512149] ? get_unmapped_area+0x1f5/0x3f0 [ 31.512507] do_mmap+0x854/0xf00 [ 31.512872] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.513217] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.513635] ksys_mmap_pgoff+0x3af/0x500 [ 31.513975] do_syscall_64+0x3f/0x90 [ 31.514298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.514852] RIP: 0033:0x7f3b4770bd82 [ 31.515154] 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 [ 31.516652] RSP: 002b:00007ffdf8d3d2e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.517325] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3b4770bd82 [ 31.517941] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3b46b45000 [ 31.518491] RBP: 00007f3b46b45000 R08: 0000000000000009 R09: 0000000000001000 [ 31.519089] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557d42b39f60 [ 31.519767] R13: 00007ffdf8d3d300 R14: 00007ffdf8d3d330 R15: 00007ffdf8d3d690 [ 31.520324] [ 31.520524] [ 31.520741] Allocated by task 215: [ 31.521054] kasan_save_stack+0x22/0x50 [ 31.521388] kasan_set_track+0x25/0x30 [ 31.521764] __kasan_slab_alloc+0x59/0x70 [ 31.522110] kmem_cache_alloc+0x16b/0x370 [ 31.522449] vm_area_dup+0x20/0x160 [ 31.522801] __split_vma+0x170/0x950 [ 31.523114] split_vma+0xc6/0x110 [ 31.523404] mprotect_fixup+0x8d2/0xb30 [ 31.523786] do_mprotect_pkey+0x87e/0xd40 [ 31.524129] __x64_sys_mprotect+0x78/0xc0 [ 31.524471] do_syscall_64+0x3f/0x90 [ 31.524936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.525451] [ 31.525646] Freed by task 19: [ 31.525899] kasan_save_stack+0x22/0x50 [ 31.526231] kasan_set_track+0x25/0x30 [ 31.526601] kasan_save_free_info+0x2b/0x50 [ 31.526958] __kasan_slab_free+0x10a/0x190 [ 31.527309] kmem_cache_free+0x10d/0x4d0 [ 31.527695] rcu_core+0x8c8/0x2860 [ 31.527996] __do_softirq+0x1b7/0x7d4 [ 31.528313] [ 31.528456] Last potentially related work creation: [ 31.528919] kasan_save_stack+0x22/0x50 [ 31.529261] __kasan_record_aux_stack+0x8e/0xa0 [ 31.529778] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.530146] remove_vma+0x139/0x170 [ 31.530404] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.530772] do_vmi_munmap+0x1f1/0x2b0 [ 31.531053] __vm_munmap+0x138/0x3a0 [ 31.531312] __x64_sys_munmap+0x59/0x80 [ 31.531647] do_syscall_64+0x3f/0x90 [ 31.531923] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.532292] [ 31.532412] The buggy address belongs to the object at ffff88800f017828 [ 31.532412] which belongs to the cache vm_area_struct of size 168 [ 31.533379] The buggy address is located 88 bytes inside of [ 31.533379] freed 168-byte region [ffff88800f017828, ffff88800f0178d0) [ 31.534223] [ 31.534345] The buggy address belongs to the physical page: [ 31.534765] page:000000005485d80f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf017 [ 31.535386] memcg:ffff888016c40f01 [ 31.535670] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.536044] page_type: 0xffffffff() [ 31.536303] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.536898] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016c40f01 [ 31.537521] page dumped because: kasan: bad access detected [ 31.537941] [ 31.538064] Memory state around the buggy address: [ 31.538392] ffff88800f017780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.538921] ffff88800f017800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.539405] >ffff88800f017880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.539936] ^ [ 31.540164] ffff88800f017900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.540724] ffff88800f017980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.541306] ================================================================== [ 31.551028] Disabling lock debugging due to kernel taint [ 33.909285] BUG: Bad rss-counter state mm:000000009363399a type:MM_FILEPAGES val:33 [ 33.909941] BUG: Bad rss-counter state mm:000000009363399a type:MM_ANONPAGES val:22 [ 35.909174] BUG: Bad rss-counter state mm:0000000016996b0a type:MM_FILEPAGES val:33 [ 35.909827] BUG: Bad rss-counter state mm:0000000016996b0a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38412' (ECDSA) to the list of known hosts. 2023/06/21 10:12:39 fuzzer started 2023/06/21 10:12:40 dialing manager at localhost:36067 2023/06/21 10:12:40 checking machine... 2023/06/21 10:12:40 checking revisions... [ 36.811748] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:12:40 testing simple program... [ 36.879083] cgroup: Unknown subsys name 'net' [ 36.940476] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:12:40 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=00000046 [---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 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=00007fbb9fe07328 CR3=0000000005482000 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=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 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=00007f62c03c5000 CR3=000000000d88e000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=ae5d7d7c95c4d42500000000001330b0 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=45fd11170afa89de00000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000