[ 23.898754] BUG: Bad rss-counter state mm:000000007040f2bd type:MM_FILEPAGES val:33 [ 23.900208] BUG: Bad rss-counter state mm:000000007040f2bd type:MM_ANONPAGES val:22 [ 24.073363] ================================================================== [ 24.074282] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.075280] Read of size 8 at addr ffff888019dcc228 by task sshd/220 [ 24.076174] [ 24.076398] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.077293] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.078318] Call Trace: [ 24.078664] [ 24.078972] dump_stack_lvl+0x91/0xf0 [ 24.079460] print_report+0xcc/0x620 [ 24.079997] ? __virt_addr_valid+0x102/0x340 [ 24.080561] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.081212] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.081828] kasan_report+0xbe/0xf0 [ 24.082305] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.082963] vma_interval_tree_remove+0xc75/0xec0 [ 24.083574] vma_prepare+0xc54/0x11a0 [ 24.084100] __split_vma+0x5af/0x950 [ 24.084588] ? __pfx___split_vma+0x10/0x10 [ 24.085149] ? find_held_lock+0x2c/0x110 [ 24.085689] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.086272] ? lock_is_held_type+0x9f/0x120 [ 24.086853] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.087503] ? mtree_range_walk+0x632/0x900 [ 24.088065] ? mas_walk+0x5c7/0x7c0 [ 24.088562] do_vmi_munmap+0x1f1/0x2b0 [ 24.089081] mmap_region+0x1f9/0x2660 [ 24.089580] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.090099] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.090819] ? __pfx_lock_acquire+0x10/0x10 [ 24.091353] ? __pfx_mmap_region+0x10/0x10 [ 24.091923] ? security_mmap_addr+0x7d/0xa0 [ 24.092479] ? get_unmapped_area+0x1f5/0x3f0 [ 24.093056] do_mmap+0x854/0xf00 [ 24.093501] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.094010] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.094572] ksys_mmap_pgoff+0x3af/0x500 [ 24.095113] do_syscall_64+0x3f/0x90 [ 24.095588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.096260] RIP: 0033:0x7f9266599d82 [ 24.096767] 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 [ 24.098947] RSP: 002b:00007ffc950994b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.099845] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9266599d82 [ 24.100687] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f92659d3000 [ 24.101525] RBP: 00007f92659d3000 R08: 0000000000000009 R09: 0000000000001000 [ 24.102360] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557193b9c980 [ 24.103210] R13: 00007ffc950994d0 R14: 00007ffc95099500 R15: 00007ffc95099860 [ 24.104055] [ 24.104348] [ 24.104561] Allocated by task 213: [ 24.104986] kasan_save_stack+0x22/0x50 [ 24.105484] kasan_set_track+0x25/0x30 [ 24.105980] __kasan_slab_alloc+0x59/0x70 [ 24.106498] kmem_cache_alloc+0x16b/0x370 [ 24.107021] vm_area_dup+0x20/0x160 [ 24.107469] __split_vma+0x170/0x950 [ 24.107944] split_vma+0xc6/0x110 [ 24.108378] mprotect_fixup+0x8d2/0xb30 [ 24.108877] do_mprotect_pkey+0x87e/0xd40 [ 24.109397] __x64_sys_mprotect+0x78/0xc0 [ 24.109910] do_syscall_64+0x3f/0x90 [ 24.110383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.111045] [ 24.111258] Freed by task 213: [ 24.111645] kasan_save_stack+0x22/0x50 [ 24.112150] kasan_set_track+0x25/0x30 [ 24.112635] kasan_save_free_info+0x2b/0x50 [ 24.113167] __kasan_slab_free+0x10a/0x190 [ 24.113691] kmem_cache_free+0x10d/0x4d0 [ 24.114192] rcu_core+0x8c8/0x2860 [ 24.114650] __do_softirq+0x1b7/0x7d4 [ 24.115135] [ 24.115356] Last potentially related work creation: [ 24.115933] kasan_save_stack+0x22/0x50 [ 24.116431] __kasan_record_aux_stack+0x8e/0xa0 [ 24.117000] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.117633] remove_vma+0x139/0x170 [ 24.118082] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.118644] do_vmi_munmap+0x1f1/0x2b0 [ 24.119133] __vm_munmap+0x138/0x3a0 [ 24.119592] __x64_sys_munmap+0x59/0x80 [ 24.120092] do_syscall_64+0x3f/0x90 [ 24.120557] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.121190] [ 24.121409] The buggy address belongs to the object at ffff888019dcc1d0 [ 24.121409] which belongs to the cache vm_area_struct of size 168 [ 24.122921] The buggy address is located 88 bytes inside of [ 24.122921] freed 168-byte region [ffff888019dcc1d0, ffff888019dcc278) [ 24.124325] [ 24.124542] The buggy address belongs to the physical page: [ 24.125196] page:0000000020c745bf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19dcc [ 24.126277] memcg:ffff888016507701 [ 24.126713] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.127357] page_type: 0xffffffff() [ 24.127810] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 24.128722] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016507701 [ 24.129622] page dumped because: kasan: bad access detected [ 24.130277] [ 24.130490] Memory state around the buggy address: [ 24.131129] ffff888019dcc100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.132164] ffff888019dcc180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 24.133034] >ffff888019dcc200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 24.133878] ^ [ 24.134438] ffff888019dcc280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.135313] ffff888019dcc300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.136158] ================================================================== [ 24.137123] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.845265] BUG: Bad rss-counter state mm:0000000039b1c7ff type:MM_FILEPAGES val:33 [ 26.846256] BUG: Bad rss-counter state mm:0000000039b1c7ff type:MM_ANONPAGES val:22 [ 27.335950] BUG: Bad rss-counter state mm:0000000024ed4a2a type:MM_FILEPAGES val:33 [ 27.336932] BUG: Bad rss-counter state mm:0000000024ed4a2a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31846' (ECDSA) to the list of known hosts. 2023/06/19 14:25:49 fuzzer started 2023/06/19 14:25:49 dialing manager at localhost:44161 2023/06/19 14:25:50 checking machine... 2023/06/19 14:25:50 checking revisions... [ 28.099206] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:25:50 testing simple program... [ 28.150135] cgroup: Unknown subsys name 'net' [ 28.216012] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:25:49 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=ffff88801c727b50 RDX=0000000000000000 RSI=ffffffff813ad6d0 RDI=ffff88801c727ab0 RBP=ffff88801c727b48 RSP=ffff88801c727aa0 R8 =0000000000000001 R9 =ffff88801c727af0 R10=0000000000038001 R11=0000000000003c0d R12=ffff88801c727b78 R13=0000000000000000 R14=ffff88800c7c3680 R15=ffff888016542d10 RIP=ffffffff811305e0 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 00007fd49581b900 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=00007fd495dd30b0 CR3=000000000fe0e000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb2f13 RBX=ffffffff85d97898 RCX=ffffffff8118ddc2 RDX=0000000000000000 RSI=ffffffff8609fada RDI=ffffffff85d97888 RBP=ffffffff85d97888 RSP=ffff88806cf09998 R8 =ffffffff8609fada R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000000792d R12=ffffffff85d978ac R13=ffffffff85d97888 R14=ffffffff85d97888 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----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 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=00007fc425ae1f20 CR3=000000000cc40000 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=f40f7bc0d7fa7c9ebb4eb8e0a2e17469 XMM02=000000000011c5a0ec2efd57dc4c00df XMM03=0000000000123428ede2336a5497b9bf XMM04=22f0199c55be0ee900000000000ae988 XMM05=19e9129bd510f2350000000000133028 XMM06=4fda316b135da52b0000000000132eb0 XMM07=e042d86d42eb936e00000000001236a8 XMM08=ede2336a5497b9bf000000000011c600 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000