[ 27.191018] BUG: Bad rss-counter state mm:000000001ddec858 type:MM_FILEPAGES val:33 [ 27.192351] BUG: Bad rss-counter state mm:000000001ddec858 type:MM_ANONPAGES val:22 [ 27.236990] ================================================================== [ 27.237997] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.239052] Read of size 8 at addr ffff88800ec735c8 by task sshd/219 [ 27.239915] [ 27.240160] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.241119] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.242206] Call Trace: [ 27.242556] [ 27.242864] dump_stack_lvl+0x91/0xf0 [ 27.243421] print_report+0xcc/0x620 [ 27.243953] ? __virt_addr_valid+0x102/0x340 [ 27.244553] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.245228] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.245899] kasan_report+0xbe/0xf0 [ 27.246413] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.247083] vma_interval_tree_remove+0xc75/0xec0 [ 27.247775] vma_prepare+0xc54/0x11a0 [ 27.248303] __split_vma+0x5af/0x950 [ 27.248821] ? __pfx___split_vma+0x10/0x10 [ 27.249399] ? find_held_lock+0x2c/0x110 [ 27.249974] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.250590] ? lock_is_held_type+0x9f/0x120 [ 27.251193] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.251869] ? mtree_range_walk+0x632/0x900 [ 27.252474] ? mas_walk+0x5c7/0x7c0 [ 27.253006] do_vmi_munmap+0x1f1/0x2b0 [ 27.253549] mmap_region+0x1f9/0x2660 [ 27.254086] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.254664] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.255503] ? __pfx_lock_acquire+0x10/0x10 [ 27.256111] ? __pfx_mmap_region+0x10/0x10 [ 27.256724] ? security_mmap_addr+0x7d/0xa0 [ 27.257332] ? get_unmapped_area+0x1f5/0x3f0 [ 27.257976] do_mmap+0x854/0xf00 [ 27.258483] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.259053] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.259723] ksys_mmap_pgoff+0x3af/0x500 [ 27.260314] do_syscall_64+0x3f/0x90 [ 27.260869] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.261624] RIP: 0033:0x7f29e7a48d82 [ 27.262154] 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 [ 27.264660] RSP: 002b:00007ffcf3da04b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.265731] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f29e7a48d82 [ 27.266734] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f29e6e82000 [ 27.267755] RBP: 00007f29e6e82000 R08: 0000000000000009 R09: 0000000000001000 [ 27.268750] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563d80a4dec0 [ 27.269759] R13: 00007ffcf3da04d0 R14: 00007ffcf3da0500 R15: 00007ffcf3da0860 [ 27.270782] [ 27.271130] [ 27.271390] Allocated by task 212: [ 27.271898] kasan_save_stack+0x22/0x50 [ 27.272503] kasan_set_track+0x25/0x30 [ 27.273096] __kasan_slab_alloc+0x59/0x70 [ 27.273726] kmem_cache_alloc+0x16b/0x370 [ 27.274339] vm_area_dup+0x20/0x160 [ 27.274883] __split_vma+0x170/0x950 [ 27.275459] split_vma+0xc6/0x110 [ 27.275994] mprotect_fixup+0x8d2/0xb30 [ 27.276600] do_mprotect_pkey+0x87e/0xd40 [ 27.277231] __x64_sys_mprotect+0x78/0xc0 [ 27.277860] do_syscall_64+0x3f/0x90 [ 27.278428] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.279186] [ 27.279466] Freed by task 212: [ 27.279942] kasan_save_stack+0x22/0x50 [ 27.280541] kasan_set_track+0x25/0x30 [ 27.281144] kasan_save_free_info+0x2b/0x50 [ 27.281796] __kasan_slab_free+0x10a/0x190 [ 27.282431] kmem_cache_free+0x10d/0x4d0 [ 27.283045] rcu_core+0x8c8/0x2860 [ 27.283586] __do_softirq+0x1b7/0x7d4 [ 27.284161] [ 27.284418] Last potentially related work creation: [ 27.285138] kasan_save_stack+0x22/0x50 [ 27.285742] __kasan_record_aux_stack+0x8e/0xa0 [ 27.286461] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.287251] remove_vma+0x139/0x170 [ 27.287831] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.288517] do_vmi_munmap+0x1f1/0x2b0 [ 27.289123] __vm_munmap+0x138/0x3a0 [ 27.289701] __x64_sys_munmap+0x59/0x80 [ 27.290298] do_syscall_64+0x3f/0x90 [ 27.290833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.291479] [ 27.291695] The buggy address belongs to the object at ffff88800ec73570 [ 27.291695] which belongs to the cache vm_area_struct of size 168 [ 27.293168] The buggy address is located 88 bytes inside of [ 27.293168] freed 168-byte region [ffff88800ec73570, ffff88800ec73618) [ 27.294578] [ 27.294794] The buggy address belongs to the physical page: [ 27.295466] page:0000000039e408c1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec73 [ 27.296565] memcg:ffff88800d31bd01 [ 27.297000] flags: 0x100000000000200(slab|node=0|zone=1) [ 27.297645] page_type: 0xffffffff() [ 27.298097] raw: 0100000000000200 ffff88800879fc80 ffffea0000398340 dead000000000004 [ 27.299027] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d31bd01 [ 27.299946] page dumped because: kasan: bad access detected [ 27.300604] [ 27.300820] Memory state around the buggy address: [ 27.301401] ffff88800ec73480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.302255] ffff88800ec73500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 27.303105] >ffff88800ec73580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.303969] ^ [ 27.304631] ffff88800ec73600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 27.305485] ffff88800ec73680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.306336] ================================================================== [ 27.307650] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.245743] BUG: Bad rss-counter state mm:00000000d0d254f7 type:MM_FILEPAGES val:33 [ 29.246917] BUG: Bad rss-counter state mm:00000000d0d254f7 type:MM_ANONPAGES val:22 [ 29.805472] BUG: Bad rss-counter state mm:00000000225fb53c type:MM_FILEPAGES val:33 [ 29.806647] BUG: Bad rss-counter state mm:00000000225fb53c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40609' (ECDSA) to the list of known hosts. 2023/06/19 14:42:49 fuzzer started 2023/06/19 14:42:49 dialing manager at localhost:44161 2023/06/19 14:42:49 checking machine... 2023/06/19 14:42:49 checking revisions... [ 30.463459] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:42:49 testing simple program... [ 30.510209] cgroup: Unknown subsys name 'net' [ 30.558392] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:42:45 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff846000aa RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffff888018ca7f48 RDI=ffffffff846000aa RBP=ffffffff846000aa RSP=ffff88806ce09a40 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888015dfd1c0 R15=ffff88800d770670 RIP=ffffffff811fc6f7 RFL=00000292 [--S-A--] 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 00007f4d1e269700 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=00007fb12feb9618 CR3=00000000145bc000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732039343a3234 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383137 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=1ffff1100134c8f6 RBX=ffff888009a647b0 RCX=0000000000000000 RDX=ffff88800e350000 RSI=ffffffff83c6316a RDI=ffffffff87f94830 RBP=0000000000000000 RSP=ffff888016e676a8 R8 =0000000000000005 R9 =00000000000000ff R10=00000000000000f6 R11=000009ba000009ba R12=0000000000000000 R13=00000000000000f6 R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff83c6319b RFL=00000246 [---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 00007fb12f902900 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=00007ff76707f850 CR3=0000000006b3c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000