syzkaller login: [ 38.940853] BUG: Bad rss-counter state mm:000000007f497b98 type:MM_FILEPAGES val:33 [ 38.942688] BUG: Bad rss-counter state mm:000000007f497b98 type:MM_ANONPAGES val:22 [ 39.101363] ================================================================== [ 39.102503] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.103473] Read of size 8 at addr ffff8880182d2c20 by task sshd/218 [ 39.104375] [ 39.104590] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.105462] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.106465] Call Trace: [ 39.106786] [ 39.107070] dump_stack_lvl+0x91/0xf0 [ 39.107567] print_report+0xcc/0x620 [ 39.108050] ? __virt_addr_valid+0x102/0x340 [ 39.108598] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.109216] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.109831] kasan_report+0xbe/0xf0 [ 39.110315] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.110942] vma_interval_tree_remove+0xc75/0xec0 [ 39.111533] vma_prepare+0xc54/0x11a0 [ 39.112011] __split_vma+0x5af/0x950 [ 39.112479] ? __pfx___split_vma+0x10/0x10 [ 39.113004] ? find_held_lock+0x2c/0x110 [ 39.113524] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.114087] ? lock_is_held_type+0x9f/0x120 [ 39.114638] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.115245] ? mtree_range_walk+0x632/0x900 [ 39.115795] ? mas_walk+0x5c7/0x7c0 [ 39.116265] do_vmi_munmap+0x1f1/0x2b0 [ 39.116750] mmap_region+0x1f9/0x2660 [ 39.117233] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.117739] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.118460] ? __pfx_lock_acquire+0x10/0x10 [ 39.118989] ? __pfx_mmap_region+0x10/0x10 [ 39.119515] ? security_mmap_addr+0x7d/0xa0 [ 39.120047] ? get_unmapped_area+0x1f5/0x3f0 [ 39.120589] do_mmap+0x854/0xf00 [ 39.121029] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.121520] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.122079] ksys_mmap_pgoff+0x3af/0x500 [ 39.122610] do_syscall_64+0x3f/0x90 [ 39.123093] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.123732] RIP: 0033:0x7f355e4cfd82 [ 39.124183] 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 [ 39.126301] RSP: 002b:00007ffe20b65708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.127188] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f355e4cfd82 [ 39.128027] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f355d909000 [ 39.128861] RBP: 00007f355d909000 R08: 0000000000000009 R09: 0000000000001000 [ 39.129695] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560e1f045ec0 [ 39.130543] R13: 00007ffe20b65720 R14: 00007ffe20b65750 R15: 00007ffe20b65ab0 [ 39.131388] [ 39.131675] [ 39.131893] Allocated by task 211: [ 39.132317] kasan_save_stack+0x22/0x50 [ 39.132822] kasan_set_track+0x25/0x30 [ 39.133310] __kasan_slab_alloc+0x59/0x70 [ 39.133834] kmem_cache_alloc+0x16b/0x370 [ 39.134360] vm_area_dup+0x20/0x160 [ 39.134817] __split_vma+0x170/0x950 [ 39.135283] split_vma+0xc6/0x110 [ 39.135723] mprotect_fixup+0x8d2/0xb30 [ 39.136230] do_mprotect_pkey+0x87e/0xd40 [ 39.136747] __x64_sys_mprotect+0x78/0xc0 [ 39.137274] do_syscall_64+0x3f/0x90 [ 39.137746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.138385] [ 39.138596] Freed by task 211: [ 39.138993] kasan_save_stack+0x22/0x50 [ 39.139489] kasan_set_track+0x25/0x30 [ 39.139981] kasan_save_free_info+0x2b/0x50 [ 39.140506] __kasan_slab_free+0x10a/0x190 [ 39.141033] kmem_cache_free+0x10d/0x4d0 [ 39.141538] rcu_core+0x8c8/0x2860 [ 39.141978] __do_softirq+0x1b7/0x7d4 [ 39.142459] [ 39.142671] Last potentially related work creation: [ 39.143260] kasan_save_stack+0x22/0x50 [ 39.143761] __kasan_record_aux_stack+0x8e/0xa0 [ 39.144338] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.144985] remove_vma+0x139/0x170 [ 39.145503] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.146057] do_vmi_munmap+0x1f1/0x2b0 [ 39.146554] __vm_munmap+0x138/0x3a0 [ 39.147017] __x64_sys_munmap+0x59/0x80 [ 39.147524] do_syscall_64+0x3f/0x90 [ 39.147998] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.148630] [ 39.148847] The buggy address belongs to the object at ffff8880182d2bc8 [ 39.148847] which belongs to the cache vm_area_struct of size 168 [ 39.150409] The buggy address is located 88 bytes inside of [ 39.150409] freed 168-byte region [ffff8880182d2bc8, ffff8880182d2c70) [ 39.151804] [ 39.152022] The buggy address belongs to the physical page: [ 39.152671] page:00000000fe5a71ea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x182d2 [ 39.153757] memcg:ffff88800e4e8d01 [ 39.154187] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.154846] page_type: 0xffffffff() [ 39.155297] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.156205] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4e8d01 [ 39.157108] page dumped because: kasan: bad access detected [ 39.157762] [ 39.157987] Memory state around the buggy address: [ 39.158570] ffff8880182d2b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.159411] ffff8880182d2b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 39.160262] >ffff8880182d2c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.161122] ^ [ 39.161659] ffff8880182d2c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.162539] ffff8880182d2d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.163397] ================================================================== [ 39.164348] Disabling lock debugging due to kernel taint [ 41.757506] BUG: Bad rss-counter state mm:0000000012484732 type:MM_FILEPAGES val:33 [ 41.758832] BUG: Bad rss-counter state mm:0000000012484732 type:MM_ANONPAGES val:22 [ 42.305434] BUG: Bad rss-counter state mm:00000000203bbac8 type:MM_FILEPAGES val:33 [ 42.306672] BUG: Bad rss-counter state mm:00000000203bbac8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48568' (ECDSA) to the list of known hosts. 2023/06/19 19:46:03 fuzzer started 2023/06/19 19:46:04 dialing manager at localhost:44161 2023/06/19 19:46:04 checking machine... 2023/06/19 19:46:04 checking revisions... [ 42.962151] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:46:04 testing simple program... [ 43.013148] cgroup: Unknown subsys name 'net' [ 43.100743] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:46:03 Registers: info registers vcpu 0 RAX=ffff888018360000 RBX=ffff88801835f870 RCX=ffffffff86137501 RDX=ffff88801835f878 RSI=0000000000000000 RDI=ffff88801835f530 RBP=ffff888018358000 RSP=ffff88801835f4b0 R8 =ffffffff8613751e R9 =ffff88801835f560 R10=0000000000038001 R11=0000000000020d8a R12=ffff88801835f580 R13=ffff88801835f568 R14=ffff88801835f870 R15=ffff88801835f520 RIP=ffffffff81131296 RFL=00000287 [--S--PC] 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 00007fddb204d700 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=00007f0a927e3460 CR3=000000000d562000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a38393336342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383933 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fff3f0c5c98 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=00007f894f69c51000005591203f6790 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