[ 26.200382] BUG: Bad rss-counter state mm:000000004b0ec635 type:MM_FILEPAGES val:33 [ 26.201829] BUG: Bad rss-counter state mm:000000004b0ec635 type:MM_ANONPAGES val:22 [ 26.328352] ================================================================== [ 26.329087] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.329833] Read of size 8 at addr ffff88800e1c9798 by task sshd/218 [ 26.330452] [ 26.330629] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.331319] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.332209] Call Trace: [ 26.332464] <TASK> [ 26.332692] dump_stack_lvl+0x91/0xf0 [ 26.333098] print_report+0xcc/0x620 [ 26.333487] ? __virt_addr_valid+0x102/0x340 [ 26.333932] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.334427] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.334926] kasan_report+0xbe/0xf0 [ 26.335310] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.335806] vma_interval_tree_remove+0xc75/0xec0 [ 26.336288] vma_prepare+0xc54/0x11a0 [ 26.336674] __split_vma+0x5af/0x950 [ 26.337072] ? __pfx___split_vma+0x10/0x10 [ 26.337499] ? find_held_lock+0x2c/0x110 [ 26.337930] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.338384] ? lock_is_held_type+0x9f/0x120 [ 26.338818] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.339315] ? mtree_range_walk+0x632/0x900 [ 26.339760] ? mas_walk+0x5c7/0x7c0 [ 26.340142] do_vmi_munmap+0x1f1/0x2b0 [ 26.340540] mmap_region+0x1f9/0x2660 [ 26.340936] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.341352] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.341928] ? __pfx_lock_acquire+0x10/0x10 [ 26.342360] ? __pfx_mmap_region+0x10/0x10 [ 26.342786] ? security_mmap_addr+0x7d/0xa0 [ 26.343212] ? get_unmapped_area+0x1f5/0x3f0 [ 26.343654] do_mmap+0x854/0xf00 [ 26.344003] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.344404] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.344867] ksys_mmap_pgoff+0x3af/0x500 [ 26.345278] do_syscall_64+0x3f/0x90 [ 26.345661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.346195] RIP: 0033:0x7fb50c426d82 [ 26.346563] 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 [ 26.348287] RSP: 002b:00007ffd6b87f9b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.349030] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb50c426d82 [ 26.349700] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb50b860000 [ 26.350382] RBP: 00007fb50b860000 R08: 0000000000000009 R09: 0000000000001000 [ 26.351059] R10: 0000000000000812 R11: 0000000000000206 R12: 00005565b98deec0 [ 26.351734] R13: 00007ffd6b87f9d0 R14: 00007ffd6b87fa00 R15: 00007ffd6b87fd60 [ 26.352417] </TASK> [ 26.352649] [ 26.352829] Allocated by task 211: [ 26.353170] kasan_save_stack+0x22/0x50 [ 26.353576] kasan_set_track+0x25/0x30 [ 26.353974] __kasan_slab_alloc+0x59/0x70 [ 26.354398] kmem_cache_alloc+0x16b/0x370 [ 26.354807] vm_area_dup+0x20/0x160 [ 26.355170] __split_vma+0x170/0x950 [ 26.355543] split_vma+0xc6/0x110 [ 26.355893] mprotect_fixup+0x8d2/0xb30 [ 26.356293] do_mprotect_pkey+0x87e/0xd40 [ 26.356707] __x64_sys_mprotect+0x78/0xc0 [ 26.357138] do_syscall_64+0x3f/0x90 [ 26.357515] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.358026] [ 26.358198] Freed by task 211: [ 26.358509] kasan_save_stack+0x22/0x50 [ 26.358908] kasan_set_track+0x25/0x30 [ 26.359307] kasan_save_free_info+0x2b/0x50 [ 26.359734] __kasan_slab_free+0x10a/0x190 [ 26.360160] kmem_cache_free+0x10d/0x4d0 [ 26.360567] rcu_core+0x8c8/0x2860 [ 26.360929] __do_softirq+0x1b7/0x7d4 [ 26.361308] [ 26.361481] Last potentially related work creation: [ 26.361944] kasan_save_stack+0x22/0x50 [ 26.362345] __kasan_record_aux_stack+0x8e/0xa0 [ 26.362800] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.363312] remove_vma+0x139/0x170 [ 26.363672] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.364116] do_vmi_munmap+0x1f1/0x2b0 [ 26.364501] __vm_munmap+0x138/0x3a0 [ 26.364881] __x64_sys_munmap+0x59/0x80 [ 26.365276] do_syscall_64+0x3f/0x90 [ 26.365654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.366165] [ 26.366347] The buggy address belongs to the object at ffff88800e1c9740 [ 26.366347] which belongs to the cache vm_area_struct of size 168 [ 26.367519] The buggy address is located 88 bytes inside of [ 26.367519] freed 168-byte region [ffff88800e1c9740, ffff88800e1c97e8) [ 26.368638] [ 26.368822] The buggy address belongs to the physical page: [ 26.369352] page:0000000057777cd5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1c9 [ 26.370223] memcg:ffff88800bf3c801 [ 26.370565] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 26.371122] page_type: 0xffffffff() [ 26.371478] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 26.372210] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800bf3c801 [ 26.372946] page dumped because: kasan: bad access detected [ 26.373480] [ 26.373655] Memory state around the buggy address: [ 26.374119] ffff88800e1c9680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.374800] ffff88800e1c9700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 26.375487] >ffff88800e1c9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 26.376167] ^ [ 26.376564] ffff88800e1c9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 26.377267] ffff88800e1c9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 26.377947] ================================================================== [ 26.378825] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.813389] BUG: Bad rss-counter state mm:00000000f8f49c72 type:MM_FILEPAGES val:33 [ 27.814381] BUG: Bad rss-counter state mm:00000000f8f49c72 type:MM_ANONPAGES val:22 [ 28.265236] BUG: Bad rss-counter state mm:000000009a7b9274 type:MM_FILEPAGES val:33 [ 28.266471] BUG: Bad rss-counter state mm:000000009a7b9274 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17562' (ECDSA) to the list of known hosts. 2023/06/19 20:37:21 fuzzer started 2023/06/19 20:37:22 dialing manager at localhost:44161 2023/06/19 20:37:22 checking machine... 2023/06/19 20:37:22 checking revisions... [ 28.848306] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:37:22 testing simple program... [ 28.895706] cgroup: Unknown subsys name 'net' [ 28.937531] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:37:19 Registers: info registers vcpu 0 RAX=ffff888019a20001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888019a1f801 RSI=ffff888019a1f870 RDI=ffff888019a1f478 RBP=ffff888019a1f870 RSP=ffff888019a1f3d0 R8 =0000000000000001 R9 =ffff888019a1f4a8 R10=0000000000038001 R11=0000000000021edf R12=0000000000000008 R13=ffff888019a18000 R14=ffff888019a1f870 R15=ffff888019a1f468 RIP=ffffffff811304ce 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 00007fb7540e7900 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=00007fb75469c650 CR3=000000000e44e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=0000000000000001 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=00007ffc3168f9e8 CR3=00000000104c2000 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=2031323a37333a3032203931206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a37333a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000