syzkaller login: [ 30.982038] BUG: Bad rss-counter state mm:000000004d4e34ca type:MM_FILEPAGES val:33 [ 30.983303] BUG: Bad rss-counter state mm:000000004d4e34ca type:MM_ANONPAGES val:22 [ 31.132136] ================================================================== [ 31.133035] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.133968] Read of size 8 at addr ffff88801971c880 by task sshd/220 [ 31.134731] [ 31.134947] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.136010] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.136999] Call Trace: [ 31.137319] [ 31.137630] dump_stack_lvl+0x91/0xf0 [ 31.138132] print_report+0xcc/0x620 [ 31.138638] ? __virt_addr_valid+0x102/0x340 [ 31.139216] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.139847] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.140476] kasan_report+0xbe/0xf0 [ 31.140961] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.141596] vma_interval_tree_remove+0xc75/0xec0 [ 31.142210] vma_prepare+0xc54/0x11a0 [ 31.142697] __split_vma+0x5af/0x950 [ 31.143174] ? __pfx___split_vma+0x10/0x10 [ 31.143716] ? find_held_lock+0x2c/0x110 [ 31.144258] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.144825] ? lock_is_held_type+0x9f/0x120 [ 31.145368] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.145997] ? mtree_range_walk+0x632/0x900 [ 31.146554] ? mas_walk+0x5c7/0x7c0 [ 31.147032] do_vmi_munmap+0x1f1/0x2b0 [ 31.147524] mmap_region+0x1f9/0x2660 [ 31.148012] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.148525] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.149244] ? __pfx_lock_acquire+0x10/0x10 [ 31.149793] ? __pfx_mmap_region+0x10/0x10 [ 31.150329] ? security_mmap_addr+0x7d/0xa0 [ 31.150863] ? get_unmapped_area+0x1f5/0x3f0 [ 31.151417] do_mmap+0x854/0xf00 [ 31.151857] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.152356] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.152923] ksys_mmap_pgoff+0x3af/0x500 [ 31.153433] do_syscall_64+0x3f/0x90 [ 31.153941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.154588] RIP: 0033:0x7f1884e9ed82 [ 31.155046] 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 [ 31.157176] RSP: 002b:00007fffb5ec7968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.158097] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1884e9ed82 [ 31.158954] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f18842d8000 [ 31.159800] RBP: 00007f18842d8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.160641] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557378f13ec0 [ 31.161517] R13: 00007fffb5ec7980 R14: 00007fffb5ec79b0 R15: 00007fffb5ec7d10 [ 31.162371] [ 31.162668] [ 31.162886] Allocated by task 213: [ 31.163312] kasan_save_stack+0x22/0x50 [ 31.163822] kasan_set_track+0x25/0x30 [ 31.164317] __kasan_slab_alloc+0x59/0x70 [ 31.164838] kmem_cache_alloc+0x16b/0x370 [ 31.165351] vm_area_dup+0x20/0x160 [ 31.165814] __split_vma+0x170/0x950 [ 31.166287] split_vma+0xc6/0x110 [ 31.166736] mprotect_fixup+0x8d2/0xb30 [ 31.167243] do_mprotect_pkey+0x87e/0xd40 [ 31.167760] __x64_sys_mprotect+0x78/0xc0 [ 31.168282] do_syscall_64+0x3f/0x90 [ 31.168756] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.169403] [ 31.169627] Freed by task 210: [ 31.170023] kasan_save_stack+0x22/0x50 [ 31.170531] kasan_set_track+0x25/0x30 [ 31.171028] kasan_save_free_info+0x2b/0x50 [ 31.171561] __kasan_slab_free+0x10a/0x190 [ 31.172100] kmem_cache_free+0x10d/0x4d0 [ 31.172608] rcu_core+0x8c8/0x2860 [ 31.173056] __do_softirq+0x1b7/0x7d4 [ 31.173552] [ 31.173765] Last potentially related work creation: [ 31.174366] kasan_save_stack+0x22/0x50 [ 31.174880] __kasan_record_aux_stack+0x8e/0xa0 [ 31.175459] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.176113] remove_vma+0x139/0x170 [ 31.176573] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.177137] do_vmi_munmap+0x1f1/0x2b0 [ 31.177718] __vm_munmap+0x138/0x3a0 [ 31.178191] __x64_sys_munmap+0x59/0x80 [ 31.178701] do_syscall_64+0x3f/0x90 [ 31.179193] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.179840] [ 31.180059] Second to last potentially related work creation: [ 31.180746] kasan_save_stack+0x22/0x50 [ 31.181260] __kasan_record_aux_stack+0x8e/0xa0 [ 31.181851] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.182496] remove_vma+0x139/0x170 [ 31.182946] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.183510] do_vmi_munmap+0x1f1/0x2b0 [ 31.183993] __vm_munmap+0x138/0x3a0 [ 31.184467] elf_map+0x26f/0x310 [ 31.184915] load_elf_binary+0xd82/0x5030 [ 31.185441] bprm_execve+0x803/0x1940 [ 31.185923] do_execveat_common+0x734/0x8e0 [ 31.186450] __x64_sys_execve+0x93/0xc0 [ 31.186944] do_syscall_64+0x3f/0x90 [ 31.187420] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.188070] [ 31.188286] The buggy address belongs to the object at ffff88801971c828 [ 31.188286] which belongs to the cache vm_area_struct of size 168 [ 31.189764] The buggy address is located 88 bytes inside of [ 31.189764] freed 168-byte region [ffff88801971c828, ffff88801971c8d0) [ 31.191167] [ 31.191388] The buggy address belongs to the physical page: [ 31.192049] page:00000000824a4847 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1971c [ 31.193152] memcg:ffff88800f08cd01 [ 31.193606] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.194319] page_type: 0xffffffff() [ 31.194777] raw: 0100000000000200 ffff8880087a0c80 ffffea0000656d00 dead000000000005 [ 31.195706] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f08cd01 [ 31.196623] page dumped because: kasan: bad access detected [ 31.197292] [ 31.197516] Memory state around the buggy address: [ 31.198098] ffff88801971c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.198979] ffff88801971c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.199848] >ffff88801971c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.200701] ^ [ 31.201118] ffff88801971c900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.201988] ffff88801971c980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.202834] ================================================================== [ 31.203837] Disabling lock debugging due to kernel taint [ 33.274712] BUG: Bad rss-counter state mm:0000000005176ad3 type:MM_FILEPAGES val:33 [ 33.275928] BUG: Bad rss-counter state mm:0000000005176ad3 type:MM_ANONPAGES val:22 [ 33.659217] BUG: Bad rss-counter state mm:00000000b8f71d77 type:MM_FILEPAGES val:33 [ 33.660225] BUG: Bad rss-counter state mm:00000000b8f71d77 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57879' (ECDSA) to the list of known hosts. 2023/06/21 04:14:35 fuzzer started 2023/06/21 04:14:35 dialing manager at localhost:36067 2023/06/21 04:14:35 checking machine... 2023/06/21 04:14:35 checking revisions... [ 34.377035] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:14:35 testing simple program... [ 34.427494] cgroup: Unknown subsys name 'net' [ 34.469996] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:14:35 Registers: info registers vcpu 0 RAX=ffff888019816860 RBX=0000000000000300 RCX=ffffffff83652d2a RDX=0000000000000000 RSI=0000000000000008 RDI=ffff888019816860 RBP=ffff888019816800 RSP=ffff888006aff868 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=ffff888019816860 R14=ffff8880196a5000 R15=ffff888019816a74 RIP=ffffffff8180f032 RFL=00000202 [-------] 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 00007f0b47fb2900 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=00007f628e4dd650 CR3=000000000c67c000 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=35a771a6711369ae5e4f2acfe122d6c0 XMM02=000000000011ccb0eff9b2d0a8fce9cb XMM03=000000000011cd802c67c8bc2e329bc3 XMM04=453d8d58e84a9a9500000000000ae988 XMM05=8c6005e0c94dec2f0000000000133920 XMM06=4fda316b135da52b0000000000132710 XMM07=fb795ef6d65770560000000000121078 XMM08=2c67c8bc2e329bc3000000000011cd20 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=0000000000000001 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=00007ffd33684ba8 CR3=0000000005482000 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=00007f7f387795100000560a84013790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000