syzkaller login: [ 38.895023] BUG: Bad rss-counter state mm:0000000016dee828 type:MM_FILEPAGES val:33 [ 38.896800] BUG: Bad rss-counter state mm:0000000016dee828 type:MM_ANONPAGES val:22 [ 39.064536] ================================================================== [ 39.065527] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.066556] Read of size 8 at addr ffff888013f0a798 by task sshd/220 [ 39.067531] [ 39.067802] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.068750] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.069844] Call Trace: [ 39.070204] [ 39.070520] dump_stack_lvl+0x91/0xf0 [ 39.071056] print_report+0xcc/0x620 [ 39.071590] ? __virt_addr_valid+0x102/0x340 [ 39.072214] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.072887] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.073577] kasan_report+0xbe/0xf0 [ 39.074128] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.074843] vma_interval_tree_remove+0xc75/0xec0 [ 39.075530] vma_prepare+0xc54/0x11a0 [ 39.076112] __split_vma+0x5af/0x950 [ 39.076660] ? __pfx___split_vma+0x10/0x10 [ 39.077279] ? find_held_lock+0x2c/0x110 [ 39.077891] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.078548] ? lock_is_held_type+0x9f/0x120 [ 39.079173] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.079908] ? mtree_range_walk+0x632/0x900 [ 39.080558] ? mas_walk+0x5c7/0x7c0 [ 39.081115] do_vmi_munmap+0x1f1/0x2b0 [ 39.081685] mmap_region+0x1f9/0x2660 [ 39.082238] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.082838] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.083668] ? __pfx_lock_acquire+0x10/0x10 [ 39.084293] ? __pfx_mmap_region+0x10/0x10 [ 39.084910] ? security_mmap_addr+0x7d/0xa0 [ 39.085532] ? get_unmapped_area+0x1f5/0x3f0 [ 39.086177] do_mmap+0x854/0xf00 [ 39.086687] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.087261] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.087941] ksys_mmap_pgoff+0x3af/0x500 [ 39.088528] do_syscall_64+0x3f/0x90 [ 39.089092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.089844] RIP: 0033:0x7f7fb247ad82 [ 39.090391] 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 [ 39.092779] RSP: 002b:00007fff32d4c188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.093789] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7fb247ad82 [ 39.094732] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7fb18b4000 [ 39.095700] RBP: 00007f7fb18b4000 R08: 0000000000000009 R09: 0000000000001000 [ 39.096728] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559b2d242ec0 [ 39.097712] R13: 00007fff32d4c1a0 R14: 00007fff32d4c1d0 R15: 00007fff32d4c530 [ 39.098719] [ 39.099057] [ 39.099301] Allocated by task 213: [ 39.099813] kasan_save_stack+0x22/0x50 [ 39.100401] kasan_set_track+0x25/0x30 [ 39.100947] __kasan_slab_alloc+0x59/0x70 [ 39.101523] kmem_cache_alloc+0x16b/0x370 [ 39.102090] vm_area_dup+0x20/0x160 [ 39.102611] __split_vma+0x170/0x950 [ 39.103119] split_vma+0xc6/0x110 [ 39.103614] mprotect_fixup+0x8d2/0xb30 [ 39.104187] do_mprotect_pkey+0x87e/0xd40 [ 39.104765] __x64_sys_mprotect+0x78/0xc0 [ 39.105338] do_syscall_64+0x3f/0x90 [ 39.105870] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.106585] [ 39.106823] Freed by task 13: [ 39.107258] kasan_save_stack+0x22/0x50 [ 39.107862] kasan_set_track+0x25/0x30 [ 39.108493] kasan_save_free_info+0x2b/0x50 [ 39.109111] __kasan_slab_free+0x10a/0x190 [ 39.109731] kmem_cache_free+0x10d/0x4d0 [ 39.110322] rcu_core+0x8c8/0x2860 [ 39.110833] __do_softirq+0x1b7/0x7d4 [ 39.111375] [ 39.111627] Last potentially related work creation: [ 39.112327] kasan_save_stack+0x22/0x50 [ 39.112909] __kasan_record_aux_stack+0x8e/0xa0 [ 39.113583] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.114328] remove_vma+0x139/0x170 [ 39.114853] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.115507] do_vmi_munmap+0x1f1/0x2b0 [ 39.116087] __vm_munmap+0x138/0x3a0 [ 39.116628] __x64_sys_munmap+0x59/0x80 [ 39.117204] do_syscall_64+0x3f/0x90 [ 39.117753] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.118500] [ 39.118746] Second to last potentially related work creation: [ 39.119548] kasan_save_stack+0x22/0x50 [ 39.120150] __kasan_record_aux_stack+0x8e/0xa0 [ 39.120817] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.121552] remove_vma+0x139/0x170 [ 39.122069] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.122722] do_vmi_munmap+0x1f1/0x2b0 [ 39.123287] mmap_region+0x1f9/0x2660 [ 39.123853] do_mmap+0x854/0xf00 [ 39.124353] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.124921] ksys_mmap_pgoff+0x3af/0x500 [ 39.125512] do_syscall_64+0x3f/0x90 [ 39.126047] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.126800] [ 39.127053] The buggy address belongs to the object at ffff888013f0a740 [ 39.127053] which belongs to the cache vm_area_struct of size 168 [ 39.128802] The buggy address is located 88 bytes inside of [ 39.128802] freed 168-byte region [ffff888013f0a740, ffff888013f0a7e8) [ 39.130421] [ 39.130669] The buggy address belongs to the physical page: [ 39.131440] page:00000000b58c1b0d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13f0a [ 39.132741] memcg:ffff88800d010b01 [ 39.133237] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.133988] page_type: 0xffffffff() [ 39.134506] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 39.135593] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d010b01 [ 39.136678] page dumped because: kasan: bad access detected [ 39.137451] [ 39.137695] Memory state around the buggy address: [ 39.138362] ffff888013f0a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.139349] ffff888013f0a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.140356] >ffff888013f0a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.141349] ^ [ 39.141925] ffff888013f0a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.142930] ffff888013f0a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.143962] ================================================================== [ 39.145045] Disabling lock debugging due to kernel taint [ 41.239337] BUG: Bad rss-counter state mm:00000000052328f1 type:MM_FILEPAGES val:33 [ 41.240867] BUG: Bad rss-counter state mm:00000000052328f1 type:MM_ANONPAGES val:22 [ 41.685005] BUG: Bad rss-counter state mm:00000000b03706c2 type:MM_FILEPAGES val:33 [ 41.686675] BUG: Bad rss-counter state mm:00000000b03706c2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40563' (ECDSA) to the list of known hosts. 2023/06/19 19:02:44 fuzzer started 2023/06/19 19:02:45 dialing manager at localhost:44161 2023/06/19 19:02:45 checking machine... 2023/06/19 19:02:45 checking revisions... [ 42.420460] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:02:45 testing simple program... [ 42.471271] cgroup: Unknown subsys name 'net' [ 42.531916] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:02:36 Registers: info registers vcpu 0 RAX=ffffea0000687680 RBX=ffff88801a1da000 RCX=ffff88800879fdc0 RDX=ffff88809a1da000 RSI=ffff88801a1d7910 RDI=ffff88800879fc80 RBP=0000000000000000 RSP=ffff8880102ffa38 R8 =ffff88801a1da000 R9 =0000000000000000 R10=ffffea00006875c0 R11=0000000080110006 R12=dffffc0000000000 R13=ffff8880102ffa78 R14=0000000000000000 R15=ffff88801a1d7910 RIP=ffffffff81810213 RFL=00000282 [--S----] 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 00007f6103e70900 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=00007ffc24598000 CR3=000000001a118000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000002 RCX=ffffffff861375e0 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff861375e4 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020dae R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09e30 R15=ffff88806cf09a98 RIP=ffffffff81130bc6 RFL=00000297 [--S-APC] 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 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=00007f68affa1a70 CR3=000000001450c000 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=d958a6cdc2448a8cb840505821d87986 XMM02=2c67c8bc2e329bc3000000000011ca28 XMM03=fb795ef6d65770560000000000124000 XMM04=3f5412cf53414ba900000000000ae988 XMM05=19e9129bd510f23500000000001351a8 XMM06=59eab8b20a8b10c70000000000134010 XMM07=e042d86d42eb936e0000000000124280 XMM08=d84e1ad4721555ae000000000011ca88 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000