[ 23.927939] BUG: Bad rss-counter state mm:000000005a5ab3d2 type:MM_FILEPAGES val:33 [ 23.928984] BUG: Bad rss-counter state mm:000000005a5ab3d2 type:MM_ANONPAGES val:22 [ 24.096576] ================================================================== [ 24.097504] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.098448] Read of size 8 at addr ffff888017f37228 by task sshd/218 [ 24.099223] [ 24.099459] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.100319] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.101289] Call Trace: [ 24.101614] [ 24.101908] dump_stack_lvl+0x91/0xf0 [ 24.102404] print_report+0xcc/0x620 [ 24.102897] ? __virt_addr_valid+0x102/0x340 [ 24.103464] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.104093] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.104716] kasan_report+0xbe/0xf0 [ 24.105199] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.105828] vma_interval_tree_remove+0xc75/0xec0 [ 24.106437] vma_prepare+0xc54/0x11a0 [ 24.106923] __split_vma+0x5af/0x950 [ 24.107430] ? __pfx___split_vma+0x10/0x10 [ 24.107966] ? find_held_lock+0x2c/0x110 [ 24.108494] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.109064] ? lock_is_held_type+0x9f/0x120 [ 24.109602] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.110213] ? mtree_range_walk+0x632/0x900 [ 24.110771] ? mas_walk+0x5c7/0x7c0 [ 24.111247] do_vmi_munmap+0x1f1/0x2b0 [ 24.111754] mmap_region+0x1f9/0x2660 [ 24.112236] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.112747] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.113460] ? __pfx_lock_acquire+0x10/0x10 [ 24.113996] ? __pfx_mmap_region+0x10/0x10 [ 24.114531] ? security_mmap_addr+0x7d/0xa0 [ 24.115065] ? get_unmapped_area+0x1f5/0x3f0 [ 24.115641] do_mmap+0x854/0xf00 [ 24.116080] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.116577] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.117136] ksys_mmap_pgoff+0x3af/0x500 [ 24.117646] do_syscall_64+0x3f/0x90 [ 24.118140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.118791] RIP: 0033:0x7f7ca46a5d82 [ 24.119258] 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 [ 24.121409] RSP: 002b:00007ffd0435d9f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.122312] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7ca46a5d82 [ 24.123168] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7ca3adf000 [ 24.124026] RBP: 00007f7ca3adf000 R08: 0000000000000009 R09: 0000000000001000 [ 24.124863] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e206964ec0 [ 24.125754] R13: 00007ffd0435da10 R14: 00007ffd0435da40 R15: 00007ffd0435dda0 [ 24.126650] [ 24.126955] [ 24.127180] Allocated by task 211: [ 24.127642] kasan_save_stack+0x22/0x50 [ 24.128167] kasan_set_track+0x25/0x30 [ 24.128679] __kasan_slab_alloc+0x59/0x70 [ 24.129224] kmem_cache_alloc+0x16b/0x370 [ 24.129763] vm_area_dup+0x20/0x160 [ 24.130235] __split_vma+0x170/0x950 [ 24.130716] split_vma+0xc6/0x110 [ 24.131174] mprotect_fixup+0x8d2/0xb30 [ 24.131809] do_mprotect_pkey+0x87e/0xd40 [ 24.132352] __x64_sys_mprotect+0x78/0xc0 [ 24.132897] do_syscall_64+0x3f/0x90 [ 24.133391] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.134062] [ 24.134287] Freed by task 209: [ 24.134694] kasan_save_stack+0x22/0x50 [ 24.135220] kasan_set_track+0x25/0x30 [ 24.135756] kasan_save_free_info+0x2b/0x50 [ 24.136312] __kasan_slab_free+0x10a/0x190 [ 24.136865] kmem_cache_free+0x10d/0x4d0 [ 24.137396] rcu_core+0x8c8/0x2860 [ 24.137857] __do_softirq+0x1b7/0x7d4 [ 24.138356] [ 24.138577] Last potentially related work creation: [ 24.139192] kasan_save_stack+0x22/0x50 [ 24.139731] __kasan_record_aux_stack+0x8e/0xa0 [ 24.140330] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.141001] remove_vma+0x139/0x170 [ 24.141477] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.142048] do_vmi_munmap+0x1f1/0x2b0 [ 24.142554] __vm_munmap+0x138/0x3a0 [ 24.143037] __x64_sys_munmap+0x59/0x80 [ 24.143565] do_syscall_64+0x3f/0x90 [ 24.144067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.144738] [ 24.144957] The buggy address belongs to the object at ffff888017f371d0 [ 24.144957] which belongs to the cache vm_area_struct of size 168 [ 24.146478] The buggy address is located 88 bytes inside of [ 24.146478] freed 168-byte region [ffff888017f371d0, ffff888017f37278) [ 24.147953] [ 24.148174] The buggy address belongs to the physical page: [ 24.148851] page:000000002eba7d2e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17f37 [ 24.149994] memcg:ffff88800f7a5701 [ 24.150434] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.151100] page_type: 0xffffffff() [ 24.151575] raw: 0100000000000200 ffff8880087a0c80 ffffea0000395c00 dead000000000006 [ 24.152522] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f7a5701 [ 24.153462] page dumped because: kasan: bad access detected [ 24.154143] [ 24.154363] Memory state around the buggy address: [ 24.154965] ffff888017f37100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.155866] ffff888017f37180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 24.156749] >ffff888017f37200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 24.157630] ^ [ 24.158206] ffff888017f37280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 24.159089] ffff888017f37300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 24.159987] ================================================================== [ 24.160942] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.848008] BUG: Bad rss-counter state mm:00000000853cdd90 type:MM_FILEPAGES val:33 [ 25.849181] BUG: Bad rss-counter state mm:00000000853cdd90 type:MM_ANONPAGES val:22 [ 26.236010] BUG: Bad rss-counter state mm:0000000047dde3ca type:MM_FILEPAGES val:33 [ 26.237164] BUG: Bad rss-counter state mm:0000000047dde3ca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23156' (ECDSA) to the list of known hosts. 2023/06/20 15:08:54 fuzzer started 2023/06/20 15:08:54 dialing manager at localhost:36067 2023/06/20 15:08:54 checking machine... 2023/06/20 15:08:54 checking revisions... [ 26.921295] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:08:54 testing simple program... [ 26.966772] cgroup: Unknown subsys name 'net' [ 27.030951] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:08:54 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fa7185ad8a0 CR3=0000000014632000 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=38303a3531203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3732325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303836 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff85a63e20 RCX=0000000000000000 RDX=ffff8880164fd1c0 RSI=ffffffff83149af7 RDI=ffffffff85a63e78 RBP=ffffffff85a63e60 RSP=ffff888017eb7aa8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff888017eb7b38 R14=0000000000000000 R15=00000000000000e3 RIP=ffffffff812d8664 RFL=00000293 [--S-A-C] 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 00007f3013c3f900 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=00007f30141f6618 CR3=0000000018f88000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000