syzkaller login: [ 39.148252] BUG: Bad rss-counter state mm:000000005c435520 type:MM_FILEPAGES val:33 [ 39.149477] BUG: Bad rss-counter state mm:000000005c435520 type:MM_ANONPAGES val:22 [ 39.191741] ================================================================== [ 39.192910] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.194115] Read of size 8 at addr ffff888016c1f880 by task sshd/220 [ 39.195085] [ 39.195403] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.196454] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.197668] Call Trace: [ 39.198114] [ 39.198430] dump_stack_lvl+0x91/0xf0 [ 39.199091] print_report+0xcc/0x620 [ 39.199737] ? __virt_addr_valid+0x102/0x340 [ 39.200375] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.201145] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.201960] kasan_report+0xbe/0xf0 [ 39.202553] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.203258] vma_interval_tree_remove+0xc75/0xec0 [ 39.203953] vma_prepare+0xc54/0x11a0 [ 39.204502] __split_vma+0x5af/0x950 [ 39.205056] ? __pfx___split_vma+0x10/0x10 [ 39.205671] ? find_held_lock+0x2c/0x110 [ 39.206272] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.206932] ? lock_is_held_type+0x9f/0x120 [ 39.207548] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.208247] ? mtree_range_walk+0x632/0x900 [ 39.208899] ? mas_walk+0x5c7/0x7c0 [ 39.209443] do_vmi_munmap+0x1f1/0x2b0 [ 39.210013] mmap_region+0x1f9/0x2660 [ 39.210568] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.211157] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.211984] ? __pfx_lock_acquire+0x10/0x10 [ 39.212616] ? __pfx_mmap_region+0x10/0x10 [ 39.213434] ? security_mmap_addr+0x7d/0xa0 [ 39.214244] ? get_unmapped_area+0x1f5/0x3f0 [ 39.215065] do_mmap+0x854/0xf00 [ 39.215733] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.216479] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.217344] ksys_mmap_pgoff+0x3af/0x500 [ 39.218104] do_syscall_64+0x3f/0x90 [ 39.218821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.219678] RIP: 0033:0x7fa84d97cd82 [ 39.220191] 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 [ 39.222603] RSP: 002b:00007ffe0362c0d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.223644] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa84d97cd82 [ 39.224620] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa84cdb6000 [ 39.225603] RBP: 00007fa84cdb6000 R08: 0000000000000009 R09: 0000000000001000 [ 39.226576] R10: 0000000000000812 R11: 0000000000000206 R12: 00005601c29d5b20 [ 39.227548] R13: 00007ffe0362c0f0 R14: 00007ffe0362c120 R15: 00007ffe0362c480 [ 39.228537] [ 39.228879] [ 39.229129] Allocated by task 213: [ 39.229686] kasan_save_stack+0x22/0x50 [ 39.230368] kasan_set_track+0x25/0x30 [ 39.231031] __kasan_slab_alloc+0x59/0x70 [ 39.231744] kmem_cache_alloc+0x16b/0x370 [ 39.232374] vm_area_dup+0x20/0x160 [ 39.233014] __split_vma+0x170/0x950 [ 39.233644] split_vma+0xc6/0x110 [ 39.234270] mprotect_fixup+0x8d2/0xb30 [ 39.234942] do_mprotect_pkey+0x87e/0xd40 [ 39.235618] __x64_sys_mprotect+0x78/0xc0 [ 39.236334] do_syscall_64+0x3f/0x90 [ 39.236955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.237825] [ 39.238079] Freed by task 213: [ 39.238607] kasan_save_stack+0x22/0x50 [ 39.239272] kasan_set_track+0x25/0x30 [ 39.239964] kasan_save_free_info+0x2b/0x50 [ 39.240695] __kasan_slab_free+0x10a/0x190 [ 39.241452] kmem_cache_free+0x10d/0x4d0 [ 39.242144] rcu_core+0x8c8/0x2860 [ 39.242782] __do_softirq+0x1b7/0x7d4 [ 39.243414] [ 39.243738] Last potentially related work creation: [ 39.244537] kasan_save_stack+0x22/0x50 [ 39.245257] __kasan_record_aux_stack+0x8e/0xa0 [ 39.246100] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.247016] remove_vma+0x139/0x170 [ 39.247657] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.248446] do_vmi_munmap+0x1f1/0x2b0 [ 39.249110] __vm_munmap+0x138/0x3a0 [ 39.249769] __x64_sys_munmap+0x59/0x80 [ 39.250467] do_syscall_64+0x3f/0x90 [ 39.251102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.251957] [ 39.252269] The buggy address belongs to the object at ffff888016c1f828 [ 39.252269] which belongs to the cache vm_area_struct of size 168 [ 39.254292] The buggy address is located 88 bytes inside of [ 39.254292] freed 168-byte region [ffff888016c1f828, ffff888016c1f8d0) [ 39.256231] [ 39.256561] The buggy address belongs to the physical page: [ 39.257447] page:0000000027337846 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c1f [ 39.259006] memcg:ffff888016d86a01 [ 39.259594] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.260492] page_type: 0xffffffff() [ 39.261127] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.262390] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016d86a01 [ 39.263637] page dumped because: kasan: bad access detected [ 39.264526] [ 39.264827] Memory state around the buggy address: [ 39.265657] ffff888016c1f780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 39.266827] ffff888016c1f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.267980] >ffff888016c1f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.269155] ^ [ 39.269752] ffff888016c1f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.270811] ffff888016c1f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 39.271896] ================================================================== [ 39.273101] Disabling lock debugging due to kernel taint [ 42.135147] BUG: Bad rss-counter state mm:0000000066c1dee5 type:MM_FILEPAGES val:33 [ 42.136298] BUG: Bad rss-counter state mm:0000000066c1dee5 type:MM_ANONPAGES val:22 [ 42.531879] BUG: Bad rss-counter state mm:00000000f5505eb4 type:MM_FILEPAGES val:33 [ 42.532498] BUG: Bad rss-counter state mm:00000000f5505eb4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45299' (ECDSA) to the list of known hosts. 2023/06/20 00:48:02 fuzzer started 2023/06/20 00:48:03 dialing manager at localhost:44161 2023/06/20 00:48:03 checking machine... 2023/06/20 00:48:03 checking revisions... [ 43.251285] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:48:03 testing simple program... [ 43.296178] cgroup: Unknown subsys name 'net' [ 43.348901] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:48:02 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000003 RCX=ffffffff81b2b658 RDX=ffff8880196d0000 RSI=0000000000000000 RDI=0000000000000003 RBP=ffff88801929be20 RSP=ffff88801670f738 R8 =0000000000000003 R9 =0000000000000000 R10=0000000000000020 R11=00000000000b6996 R12=ffff8880173ced00 R13=ffff8880173ced64 R14=0000000000000020 R15=ffff88801929bbac RIP=ffffffff814c07e0 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 00007f5c716d4700 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=00007f60bb2800b0 CR3=0000000018044000 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=2032303a38343a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a38343a3030203032 XMM08=3d656e696c646d632022656369767265 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=0000000000000001 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=00007f67d312c7a0 CR3=000000000d57a000 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=a94f4d48657a1f82024df0f868f9f008 XMM02=2c67c8bc2e329bc3000000000011e738 XMM03=fb795ef6d65770560000000000124940 XMM04=8d3fb3232315b03300000000000ae988 XMM05=e4cb8bb95a7664b60000000000134ce8 XMM06=c1df9297dbe2cfe90000000000133b50 XMM07=e042d86d42eb936e0000000000124c18 XMM08=d281b72275ef2192000000000011e798 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000