[ 32.241451] BUG: Bad rss-counter state mm:00000000c85ae346 type:MM_FILEPAGES val:33 [ 32.242671] BUG: Bad rss-counter state mm:00000000c85ae346 type:MM_ANONPAGES val:22 [ 32.364739] ================================================================== [ 32.365881] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.366980] Read of size 8 at addr ffff88801a3b4310 by task sshd/219 [ 32.368073] [ 32.368335] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.369382] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.370264] Call Trace: [ 32.370524] [ 32.370751] dump_stack_lvl+0x91/0xf0 [ 32.371147] print_report+0xcc/0x620 [ 32.371538] ? __virt_addr_valid+0x102/0x340 [ 32.371980] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.372507] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.373057] kasan_report+0xbe/0xf0 [ 32.373451] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.373948] vma_interval_tree_remove+0xc75/0xec0 [ 32.374432] vma_prepare+0xc54/0x11a0 [ 32.374817] __split_vma+0x5af/0x950 [ 32.375197] ? __pfx___split_vma+0x10/0x10 [ 32.375628] ? find_held_lock+0x2c/0x110 [ 32.376044] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.376510] ? mark_held_locks+0x9e/0xe0 [ 32.376915] ? lock_is_held_type+0x9f/0x120 [ 32.377361] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.377856] ? mtree_range_walk+0x632/0x900 [ 32.378304] ? mas_walk+0x5c7/0x7c0 [ 32.378685] do_vmi_munmap+0x1f1/0x2b0 [ 32.379090] mmap_region+0x1f9/0x2660 [ 32.379477] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.379889] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.380467] ? __pfx_lock_acquire+0x10/0x10 [ 32.380902] ? __pfx_mmap_region+0x10/0x10 [ 32.381348] ? security_mmap_addr+0x7d/0xa0 [ 32.381775] ? get_unmapped_area+0x1f5/0x3f0 [ 32.382219] do_mmap+0x854/0xf00 [ 32.382567] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.382969] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.383420] ksys_mmap_pgoff+0x3af/0x500 [ 32.383830] do_syscall_64+0x3f/0x90 [ 32.384216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.384733] RIP: 0033:0x7f417866fd82 [ 32.385111] 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 [ 32.386810] RSP: 002b:00007ffe9526bdd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.387531] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f417866fd82 [ 32.388205] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4177aa9000 [ 32.388883] RBP: 00007f4177aa9000 R08: 0000000000000009 R09: 0000000000001000 [ 32.389574] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bab95f4ec0 [ 32.390250] R13: 00007ffe9526bdf0 R14: 00007ffe9526be20 R15: 00007ffe9526c180 [ 32.390937] [ 32.391170] [ 32.391342] Allocated by task 208: [ 32.391687] kasan_save_stack+0x22/0x50 [ 32.392092] kasan_set_track+0x25/0x30 [ 32.392490] __kasan_slab_alloc+0x59/0x70 [ 32.392913] kmem_cache_alloc+0x16b/0x370 [ 32.393336] vm_area_dup+0x20/0x160 [ 32.393697] __split_vma+0x170/0x950 [ 32.394072] split_vma+0xc6/0x110 [ 32.394423] mprotect_fixup+0x8d2/0xb30 [ 32.394831] do_mprotect_pkey+0x87e/0xd40 [ 32.395248] __x64_sys_mprotect+0x78/0xc0 [ 32.395667] do_syscall_64+0x3f/0x90 [ 32.396046] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.396557] [ 32.396729] Freed by task 208: [ 32.397067] kasan_save_stack+0x22/0x50 [ 32.397466] kasan_set_track+0x25/0x30 [ 32.397863] kasan_save_free_info+0x2b/0x50 [ 32.398292] __kasan_slab_free+0x10a/0x190 [ 32.398718] kmem_cache_free+0x10d/0x4d0 [ 32.399129] rcu_core+0x8c8/0x2860 [ 32.399485] __do_softirq+0x1b7/0x7d4 [ 32.399866] [ 32.400035] Last potentially related work creation: [ 32.400505] kasan_save_stack+0x22/0x50 [ 32.400908] __kasan_record_aux_stack+0x8e/0xa0 [ 32.401377] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.401887] remove_vma+0x139/0x170 [ 32.402246] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.402694] do_vmi_munmap+0x1f1/0x2b0 [ 32.403081] __vm_munmap+0x138/0x3a0 [ 32.403454] __x64_sys_munmap+0x59/0x80 [ 32.403842] do_syscall_64+0x3f/0x90 [ 32.404221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.404735] [ 32.404907] The buggy address belongs to the object at ffff88801a3b42b8 [ 32.404907] which belongs to the cache vm_area_struct of size 168 [ 32.406091] The buggy address is located 88 bytes inside of [ 32.406091] freed 168-byte region [ffff88801a3b42b8, ffff88801a3b4360) [ 32.407215] [ 32.407385] The buggy address belongs to the physical page: [ 32.407926] page:000000009204071d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a3b4 [ 32.408912] memcg:ffff88801a314701 [ 32.409280] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.409799] page_type: 0xffffffff() [ 32.410156] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.410879] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a314701 [ 32.411595] page dumped because: kasan: bad access detected [ 32.412117] [ 32.412289] Memory state around the buggy address: [ 32.412754] ffff88801a3b4200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 32.413441] ffff88801a3b4280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.414122] >ffff88801a3b4300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.414794] ^ [ 32.415158] ffff88801a3b4380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.415832] ffff88801a3b4400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.416514] ================================================================== [ 32.417304] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.655312] BUG: Bad rss-counter state mm:000000002b6dfa43 type:MM_FILEPAGES val:33 [ 34.656270] BUG: Bad rss-counter state mm:000000002b6dfa43 type:MM_ANONPAGES val:22 [ 35.159747] BUG: Bad rss-counter state mm:00000000ae62c787 type:MM_FILEPAGES val:33 [ 35.160978] BUG: Bad rss-counter state mm:00000000ae62c787 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46090' (ECDSA) to the list of known hosts. 2023/06/19 22:01:59 fuzzer started 2023/06/19 22:01:59 dialing manager at localhost:44161 2023/06/19 22:01:59 checking machine... 2023/06/19 22:01:59 checking revisions... [ 35.786639] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:02:00 testing simple program... [ 35.828651] cgroup: Unknown subsys name 'net' [ 35.877772] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:01:51 Registers: info registers vcpu 0 RAX=ffffffff846000aa RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110028feea6 RSI=ffffffff846000aa RDI=ffff8880147f75a0 RBP=ffff8880147f7570 RSP=ffff8880147f74d0 R8 =0000000000000001 R9 =ffff8880147f7518 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff8880147f75a0 R13=0000000000000000 R14=ffff88800d949b40 R15=ffff8880147f7d36 RIP=ffffffff813ad424 RFL=00000286 [--S--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 00007f403e3f1900 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=0000564e2a79f748 CR3=000000000f6b0000 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=077e3f887c25a7ff00000000000ae988 XMM05=65e4d45293370a150000000000134170 XMM06=ee2ba3d53e1172020000000000132bd8 XMM07=fb795ef6d657705600000000001225d0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=ffff888008c58400 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=00007fff0d19e578 CR3=00000000159b2000 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=2039353a31303a3232203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a31303a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000