[ 31.064253] BUG: Bad rss-counter state mm:00000000c0834ad2 type:MM_FILEPAGES val:33 [ 31.065466] BUG: Bad rss-counter state mm:00000000c0834ad2 type:MM_ANONPAGES val:22 [ 31.103704] ================================================================== [ 31.104797] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.105812] Read of size 8 at addr ffff88801a745058 by task sshd/219 [ 31.106597] [ 31.106820] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.107696] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.108695] Call Trace: [ 31.109016] [ 31.109305] dump_stack_lvl+0x91/0xf0 [ 31.109805] print_report+0xcc/0x620 [ 31.110305] ? __virt_addr_valid+0x102/0x340 [ 31.110886] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.111504] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.112129] kasan_report+0xbe/0xf0 [ 31.112616] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.113261] vma_interval_tree_remove+0xc75/0xec0 [ 31.113877] vma_prepare+0xc54/0x11a0 [ 31.114380] __split_vma+0x5af/0x950 [ 31.114903] ? __pfx___split_vma+0x10/0x10 [ 31.115460] ? find_held_lock+0x2c/0x110 [ 31.116007] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.116599] ? lock_is_held_type+0x9f/0x120 [ 31.117164] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.117797] ? mtree_range_walk+0x632/0x900 [ 31.118374] ? mas_walk+0x5c7/0x7c0 [ 31.118859] do_vmi_munmap+0x1f1/0x2b0 [ 31.119373] mmap_region+0x1f9/0x2660 [ 31.119879] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.120416] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.121161] ? __pfx_lock_acquire+0x10/0x10 [ 31.121726] ? __pfx_mmap_region+0x10/0x10 [ 31.122282] ? security_mmap_addr+0x7d/0xa0 [ 31.122843] ? get_unmapped_area+0x1f5/0x3f0 [ 31.123417] do_mmap+0x854/0xf00 [ 31.123877] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.124392] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.124983] ksys_mmap_pgoff+0x3af/0x500 [ 31.125518] do_syscall_64+0x3f/0x90 [ 31.126023] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.126721] RIP: 0033:0x7fba9e000d82 [ 31.127203] 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 [ 31.129451] RSP: 002b:00007ffd9b7b82d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.130402] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fba9e000d82 [ 31.131283] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fba9d43a000 [ 31.132165] RBP: 00007fba9d43a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.133061] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558b70fc5980 [ 31.133945] R13: 00007ffd9b7b82f0 R14: 00007ffd9b7b8320 R15: 00007ffd9b7b8680 [ 31.134855] [ 31.135163] [ 31.135387] Allocated by task 208: [ 31.135844] kasan_save_stack+0x22/0x50 [ 31.136373] kasan_set_track+0x25/0x30 [ 31.136896] __kasan_slab_alloc+0x59/0x70 [ 31.137452] kmem_cache_alloc+0x16b/0x370 [ 31.137994] vm_area_dup+0x20/0x160 [ 31.138464] __split_vma+0x170/0x950 [ 31.138980] split_vma+0xc6/0x110 [ 31.139435] mprotect_fixup+0x8d2/0xb30 [ 31.139962] do_mprotect_pkey+0x87e/0xd40 [ 31.140508] __x64_sys_mprotect+0x78/0xc0 [ 31.141062] do_syscall_64+0x3f/0x90 [ 31.141543] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.142199] [ 31.142420] Freed by task 117: [ 31.142840] kasan_save_stack+0x22/0x50 [ 31.143366] kasan_set_track+0x25/0x30 [ 31.143883] kasan_save_free_info+0x2b/0x50 [ 31.144451] __kasan_slab_free+0x10a/0x190 [ 31.145012] kmem_cache_free+0x10d/0x4d0 [ 31.145549] rcu_core+0x8c8/0x2860 [ 31.146017] __do_softirq+0x1b7/0x7d4 [ 31.146516] [ 31.146746] Last potentially related work creation: [ 31.147353] kasan_save_stack+0x22/0x50 [ 31.147884] __kasan_record_aux_stack+0x8e/0xa0 [ 31.148479] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.149150] remove_vma+0x139/0x170 [ 31.149622] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.150203] do_vmi_munmap+0x1f1/0x2b0 [ 31.150742] __vm_munmap+0x138/0x3a0 [ 31.151231] __x64_sys_munmap+0x59/0x80 [ 31.151749] do_syscall_64+0x3f/0x90 [ 31.152248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.152928] [ 31.153146] The buggy address belongs to the object at ffff88801a745000 [ 31.153146] which belongs to the cache vm_area_struct of size 168 [ 31.154688] The buggy address is located 88 bytes inside of [ 31.154688] freed 168-byte region [ffff88801a745000, ffff88801a7450a8) [ 31.156158] [ 31.156384] The buggy address belongs to the physical page: [ 31.157083] page:00000000358fe0ee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a745 [ 31.158236] memcg:ffff88801a73c301 [ 31.158690] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.159370] page_type: 0xffffffff() [ 31.159840] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.160805] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a73c301 [ 31.161758] page dumped because: kasan: bad access detected [ 31.162450] [ 31.162694] Memory state around the buggy address: [ 31.163306] ffff88801a744f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.164214] ffff88801a744f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.165102] >ffff88801a745000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.165997] ^ [ 31.166769] ffff88801a745080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.167679] ffff88801a745100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.168580] ================================================================== [ 31.169666] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.085769] BUG: Bad rss-counter state mm:000000009c86bbae type:MM_FILEPAGES val:33 [ 33.087035] BUG: Bad rss-counter state mm:000000009c86bbae type:MM_ANONPAGES val:22 [ 33.521126] BUG: Bad rss-counter state mm:00000000dc46efba type:MM_FILEPAGES val:33 [ 33.522305] BUG: Bad rss-counter state mm:00000000dc46efba type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52699' (ECDSA) to the list of known hosts. 2023/06/20 06:35:50 fuzzer started 2023/06/20 06:35:50 dialing manager at localhost:44161 2023/06/20 06:35:50 checking machine... 2023/06/20 06:35:50 checking revisions... [ 34.193606] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:35:51 testing simple program... [ 34.234610] cgroup: Unknown subsys name 'net' [ 34.270803] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:35:50 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffe25b10458 CR3=0000000005482000 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=00007fa3bf035510000055c3f1775790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffea0000648540 RBX=ffff888019215028 RCX=ffffea0000000000 RDX=ffffea0000648501 RSI=ffffffff813782a8 RDI=ffff8880087b6500 RBP=ffff88806cf09e58 RSP=ffff88806cf09e30 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff8880087b6500 R13=ffff888099215028 R14=ffffffff813782a8 R15=ffff888019215150 RIP=ffffffff818098cf 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 00007fe3d49d3900 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=00007f79083a9650 CR3=0000000009570000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=4f8ccabaaa3aa42d00000000000ae988 XMM05=df7b2a82b18141b80000000000134e08 XMM06=5b9e0c8aebbd0e730000000000133838 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000