[ 155.722245] BUG: Bad rss-counter state mm:000000009ad9da6e type:MM_FILEPAGES val:33 [ 155.723283] BUG: Bad rss-counter state mm:000000009ad9da6e type:MM_ANONPAGES val:22 [ 155.882319] ================================================================== [ 155.883236] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 155.884179] Read of size 8 at addr ffff888016ae9798 by task sshd/219 [ 155.884962] [ 155.885265] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 155.886297] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 155.887281] Call Trace: [ 155.887602] [ 155.887887] dump_stack_lvl+0x91/0xf0 [ 155.888380] print_report+0xcc/0x620 [ 155.888892] ? __virt_addr_valid+0x102/0x340 [ 155.889459] ? vma_interval_tree_remove+0xc75/0xec0 [ 155.890084] ? vma_interval_tree_remove+0xc75/0xec0 [ 155.890718] kasan_report+0xbe/0xf0 [ 155.891211] ? vma_interval_tree_remove+0xc75/0xec0 [ 155.891854] vma_interval_tree_remove+0xc75/0xec0 [ 155.892474] vma_prepare+0xc54/0x11a0 [ 155.892980] __split_vma+0x5af/0x950 [ 155.893469] ? __pfx___split_vma+0x10/0x10 [ 155.894009] ? find_held_lock+0x2c/0x110 [ 155.894535] do_vmi_align_munmap+0x2ba/0x11f0 [ 155.895109] ? lock_is_held_type+0x9f/0x120 [ 155.895679] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 155.896300] ? mtree_range_walk+0x632/0x900 [ 155.896885] ? mas_walk+0x5c7/0x7c0 [ 155.897369] do_vmi_munmap+0x1f1/0x2b0 [ 155.897881] mmap_region+0x1f9/0x2660 [ 155.898373] ? vm_mmap_pgoff+0x15c/0x3a0 [ 155.898891] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 155.899611] ? __pfx_lock_acquire+0x10/0x10 [ 155.900159] ? __pfx_mmap_region+0x10/0x10 [ 155.900716] ? security_mmap_addr+0x7d/0xa0 [ 155.901254] ? get_unmapped_area+0x1f5/0x3f0 [ 155.901810] do_mmap+0x854/0xf00 [ 155.902257] vm_mmap_pgoff+0x1a6/0x3a0 [ 155.902772] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 155.903345] ksys_mmap_pgoff+0x3af/0x500 [ 155.903858] do_syscall_64+0x3f/0x90 [ 155.904342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 155.904999] RIP: 0033:0x7fde65cc8d82 [ 155.905457] 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 [ 155.907609] RSP: 002b:00007ffde249de68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 155.908521] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fde65cc8d82 [ 155.909397] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fde65102000 [ 155.910255] RBP: 00007fde65102000 R08: 0000000000000009 R09: 0000000000001000 [ 155.911125] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ebad80aec0 [ 155.911990] R13: 00007ffde249de80 R14: 00007ffde249deb0 R15: 00007ffde249e210 [ 155.912892] [ 155.913197] [ 155.913419] Allocated by task 212: [ 155.913859] kasan_save_stack+0x22/0x50 [ 155.914398] kasan_set_track+0x25/0x30 [ 155.914904] __kasan_slab_alloc+0x59/0x70 [ 155.915439] kmem_cache_alloc+0x16b/0x370 [ 155.915962] vm_area_dup+0x20/0x160 [ 155.916416] __split_vma+0x170/0x950 [ 155.916895] split_vma+0xc6/0x110 [ 155.917337] mprotect_fixup+0x8d2/0xb30 [ 155.917849] do_mprotect_pkey+0x87e/0xd40 [ 155.918380] __x64_sys_mprotect+0x78/0xc0 [ 155.918915] do_syscall_64+0x3f/0x90 [ 155.919391] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 155.920047] [ 155.920265] Freed by task 210: [ 155.920679] kasan_save_stack+0x22/0x50 [ 155.921198] kasan_set_track+0x25/0x30 [ 155.921693] kasan_save_free_info+0x2b/0x50 [ 155.922234] __kasan_slab_free+0x10a/0x190 [ 155.922771] kmem_cache_free+0x10d/0x4d0 [ 155.923296] rcu_core+0x8c8/0x2860 [ 155.923743] __do_softirq+0x1b7/0x7d4 [ 155.924230] [ 155.924447] Last potentially related work creation: [ 155.925042] kasan_save_stack+0x22/0x50 [ 155.925551] __kasan_record_aux_stack+0x8e/0xa0 [ 155.926135] __call_rcu_common.constprop.0+0x6a/0xb90 [ 155.926783] remove_vma+0x139/0x170 [ 155.927249] do_vmi_align_munmap+0xd4a/0x11f0 [ 155.927811] do_vmi_munmap+0x1f1/0x2b0 [ 155.928301] __vm_munmap+0x138/0x3a0 [ 155.928793] __x64_sys_munmap+0x59/0x80 [ 155.929298] do_syscall_64+0x3f/0x90 [ 155.929774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 155.930421] [ 155.930638] The buggy address belongs to the object at ffff888016ae9740 [ 155.930638] which belongs to the cache vm_area_struct of size 168 [ 155.932148] The buggy address is located 88 bytes inside of [ 155.932148] freed 168-byte region [ffff888016ae9740, ffff888016ae97e8) [ 155.933543] [ 155.933758] The buggy address belongs to the physical page: [ 155.934420] page:000000009654ac35 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ae9 [ 155.935528] memcg:ffff88800e831e01 [ 155.935959] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 155.936680] page_type: 0xffffffff() [ 155.937127] raw: 0100000000000200 ffff88800879fc80 ffffea00005ab8c0 000000000000000b [ 155.938050] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e831e01 [ 155.938953] page dumped because: kasan: bad access detected [ 155.939618] [ 155.939837] Memory state around the buggy address: [ 155.940423] ffff888016ae9680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 155.941288] ffff888016ae9700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 155.942159] >ffff888016ae9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 155.943017] ^ [ 155.943533] ffff888016ae9800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 155.944398] ffff888016ae9880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 155.945268] ================================================================== [ 155.946239] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 157.879941] BUG: Bad rss-counter state mm:00000000fd8b5160 type:MM_FILEPAGES val:33 [ 157.881150] BUG: Bad rss-counter state mm:00000000fd8b5160 type:MM_ANONPAGES val:22 [ 158.275884] BUG: Bad rss-counter state mm:00000000ac22b047 type:MM_FILEPAGES val:33 [ 158.276922] BUG: Bad rss-counter state mm:00000000ac22b047 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37208' (ECDSA) to the list of known hosts. 2023/06/19 10:53:26 fuzzer started 2023/06/19 10:53:26 dialing manager at localhost:44161 2023/06/19 10:53:26 checking machine... 2023/06/19 10:53:26 checking revisions... [ 159.022735] kmemleak: Automatic memory scanning thread ended 2023/06/19 10:53:27 testing simple program... [ 159.075380] cgroup: Unknown subsys name 'net' [ 159.114182] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:51:14 Registers: info registers vcpu 0 RAX=1ffff110011dfa13 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff88800f598000 RSI=ffffffff818fb92a RDI=ffff888008efd098 RBP=ffff888008c14f20 RSP=ffff88801425f450 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000010000 R11=0000000000000001 R12=ffff888008efd080 R13=ffff888008818a48 R14=0000000000000000 R15=ffff888008818a48 RIP=ffffffff814c07e0 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 00007fd57cd18900 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=00007fd57c194180 CR3=000000000d49e000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=683d4d0e5091fadc00000000000ae988 XMM05=4a5571d4bd4a154a000000000016ac80 XMM06=dfcdbad4f1609c3700000000001697c8 XMM07=fb795ef6d65770560000000000155f38 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a50 RCX=0000000000000002 RDX=1ffff1100d9e134c RSI=ffff88806cf09e60 RDI=ffff88806cf09a60 RBP=ffff88806cf09e60 RSP=ffff88806cf099a8 R8 =ffffffff8614c092 R9 =ffff88806cf09a90 R10=0000000000038001 R11=00000000000244c3 R12=0000000000000008 R13=ffff88806cf02000 R14=ffff88806cf09e68 R15=ffff88806cf09a50 RIP=ffffffff81130468 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 00007fbc0cd5e900 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=00007ffdfc18b000 CR3=0000000016fc8000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000