[ 35.980649] BUG: Bad rss-counter state mm:000000009035f4bd type:MM_FILEPAGES val:33 [ 35.982068] BUG: Bad rss-counter state mm:000000009035f4bd type:MM_ANONPAGES val:22 [ 36.125272] ================================================================== [ 36.126405] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.127508] Read of size 8 at addr ffff88800fcd33f8 by task sshd/218 [ 36.128599] [ 36.128855] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.129891] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.130988] Call Trace: [ 36.131308] [ 36.131595] dump_stack_lvl+0x91/0xf0 [ 36.132086] print_report+0xcc/0x620 [ 36.132575] ? __virt_addr_valid+0x102/0x340 [ 36.133133] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.133771] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.134392] kasan_report+0xbe/0xf0 [ 36.134872] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.135489] vma_interval_tree_remove+0xc75/0xec0 [ 36.136090] vma_prepare+0xc54/0x11a0 [ 36.136570] __split_vma+0x5af/0x950 [ 36.137040] ? __pfx___split_vma+0x10/0x10 [ 36.137585] ? find_held_lock+0x2c/0x110 [ 36.138109] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.138679] ? lock_is_held_type+0x9f/0x120 [ 36.139212] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.139818] ? mtree_range_walk+0x632/0x900 [ 36.140372] ? mas_walk+0x5c7/0x7c0 [ 36.140848] do_vmi_munmap+0x1f1/0x2b0 [ 36.141356] mmap_region+0x1f9/0x2660 [ 36.141841] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.142358] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.143075] ? __pfx_lock_acquire+0x10/0x10 [ 36.143611] ? __pfx_mmap_region+0x10/0x10 [ 36.144143] ? security_mmap_addr+0x7d/0xa0 [ 36.144676] ? get_unmapped_area+0x1f5/0x3f0 [ 36.145229] do_mmap+0x854/0xf00 [ 36.145680] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.146175] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.146744] ksys_mmap_pgoff+0x3af/0x500 [ 36.147252] do_syscall_64+0x3f/0x90 [ 36.147734] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.148379] RIP: 0033:0x7f304b1cbd82 [ 36.148835] 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 [ 36.150938] RSP: 002b:00007fffb54eb238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.151839] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f304b1cbd82 [ 36.152686] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f304a605000 [ 36.153549] RBP: 00007f304a605000 R08: 0000000000000009 R09: 0000000000001000 [ 36.154392] R10: 0000000000000812 R11: 0000000000000206 R12: 00005603db4d8ec0 [ 36.155251] R13: 00007fffb54eb250 R14: 00007fffb54eb280 R15: 00007fffb54eb5e0 [ 36.156106] [ 36.156399] [ 36.156622] Allocated by task 211: [ 36.157058] kasan_save_stack+0x22/0x50 [ 36.157621] kasan_set_track+0x25/0x30 [ 36.158123] __kasan_slab_alloc+0x59/0x70 [ 36.158652] kmem_cache_alloc+0x16b/0x370 [ 36.159174] vm_area_dup+0x20/0x160 [ 36.159633] __split_vma+0x170/0x950 [ 36.160105] split_vma+0xc6/0x110 [ 36.160545] mprotect_fixup+0x8d2/0xb30 [ 36.161045] do_mprotect_pkey+0x87e/0xd40 [ 36.161582] __x64_sys_mprotect+0x78/0xc0 [ 36.162117] do_syscall_64+0x3f/0x90 [ 36.162593] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.163231] [ 36.163447] Freed by task 211: [ 36.163844] kasan_save_stack+0x22/0x50 [ 36.164343] kasan_set_track+0x25/0x30 [ 36.164839] kasan_save_free_info+0x2b/0x50 [ 36.165378] __kasan_slab_free+0x10a/0x190 [ 36.165910] kmem_cache_free+0x10d/0x4d0 [ 36.166417] rcu_core+0x8c8/0x2860 [ 36.166868] __do_softirq+0x1b7/0x7d4 [ 36.167344] [ 36.167561] Last potentially related work creation: [ 36.168154] kasan_save_stack+0x22/0x50 [ 36.168659] __kasan_record_aux_stack+0x8e/0xa0 [ 36.169280] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.169948] remove_vma+0x139/0x170 [ 36.170404] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.170968] do_vmi_munmap+0x1f1/0x2b0 [ 36.171455] __vm_munmap+0x138/0x3a0 [ 36.171927] __x64_sys_munmap+0x59/0x80 [ 36.172423] do_syscall_64+0x3f/0x90 [ 36.172903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.173557] [ 36.173779] The buggy address belongs to the object at ffff88800fcd33a0 [ 36.173779] which belongs to the cache vm_area_struct of size 168 [ 36.175241] The buggy address is located 88 bytes inside of [ 36.175241] freed 168-byte region [ffff88800fcd33a0, ffff88800fcd3448) [ 36.176659] [ 36.176876] The buggy address belongs to the physical page: [ 36.177551] page:0000000023b165e9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfcd3 [ 36.178647] memcg:ffff88800df4a201 [ 36.179073] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.179778] page_type: 0xffffffff() [ 36.180232] raw: 0100000000000200 ffff88800879fc80 ffffea00003b9bc0 dead000000000007 [ 36.181152] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df4a201 [ 36.182073] page dumped because: kasan: bad access detected [ 36.182740] [ 36.182957] Memory state around the buggy address: [ 36.183542] ffff88800fcd3280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 36.184395] ffff88800fcd3300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 36.185250] >ffff88800fcd3380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 36.186109] ^ [ 36.186957] ffff88800fcd3400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 36.187816] ffff88800fcd3480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.188670] ================================================================== [ 36.189615] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 38.651286] BUG: Bad rss-counter state mm:000000008190dad6 type:MM_FILEPAGES val:33 [ 38.652268] BUG: Bad rss-counter state mm:000000008190dad6 type:MM_ANONPAGES val:22 [ 39.129518] BUG: Bad rss-counter state mm:00000000abf307eb type:MM_FILEPAGES val:33 [ 39.130469] BUG: Bad rss-counter state mm:00000000abf307eb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17320' (ECDSA) to the list of known hosts. 2023/06/19 11:45:12 fuzzer started 2023/06/19 11:45:12 dialing manager at localhost:44161 2023/06/19 11:45:12 checking machine... 2023/06/19 11:45:12 checking revisions... [ 39.876822] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:45:12 testing simple program... [ 39.922960] cgroup: Unknown subsys name 'net' [ 39.970231] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:45:00 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff813bde72 RDI=ffff88800847e02c RBP=ffff88806ce39500 RSP=ffff88806ce09d30 R8 =ffff88806ce39f70 R9 =0000000000016132 R10=0000000000016132 R11=0000000000000001 R12=0000000000039500 R13=ffff88800847e000 R14=ffff888016318000 R15=ffff88806ce395c0 RIP=ffffffff8125e6d8 RFL=00000046 [---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 00007ff6cf021900 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=00007ff6cf5d8618 CR3=000000000dc10000 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=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 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=00007f6745329000 CR3=00000000103b6000 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=00000000000000000000000000000000 XMM01=9781a264f77fc387324b32066092c27a XMM02=000000000011cef8eff9b2d0a8fce9cb XMM03=000000000011cfc82c67c8bc2e329bc3 XMM04=83dda0f781d97abd00000000000ae988 XMM05=751b9502027dc0b900000000001339b0 XMM06=e5047faaa21a263d0000000000132b88 XMM07=e042d86d42eb936e00000000001240c8 XMM08=060f35bce061d76b000000000011cfc8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000