[ 23.939728] BUG: Bad rss-counter state mm:00000000ad9babf4 type:MM_FILEPAGES val:33 [ 23.941192] BUG: Bad rss-counter state mm:00000000ad9babf4 type:MM_ANONPAGES val:22 [ 24.111466] ================================================================== [ 24.112422] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.113389] Read of size 8 at addr ffff88800d3d9d08 by task sshd/219 [ 24.114179] [ 24.114493] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.115362] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.116369] Call Trace: [ 24.116702] [ 24.116997] dump_stack_lvl+0x91/0xf0 [ 24.117502] print_report+0xcc/0x620 [ 24.117993] ? __virt_addr_valid+0x102/0x340 [ 24.118571] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.119217] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.119859] kasan_report+0xbe/0xf0 [ 24.120333] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.120969] vma_interval_tree_remove+0xc75/0xec0 [ 24.121567] vma_prepare+0xc54/0x11a0 [ 24.122052] __split_vma+0x5af/0x950 [ 24.122534] ? __pfx___split_vma+0x10/0x10 [ 24.123076] ? find_held_lock+0x2c/0x110 [ 24.123611] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.124193] ? lock_is_held_type+0x9f/0x120 [ 24.124754] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.125373] ? mtree_range_walk+0x632/0x900 [ 24.125950] ? mas_walk+0x5c7/0x7c0 [ 24.126483] do_vmi_munmap+0x1f1/0x2b0 [ 24.126995] mmap_region+0x1f9/0x2660 [ 24.127500] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.128034] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.128781] ? __pfx_lock_acquire+0x10/0x10 [ 24.129324] ? __pfx_mmap_region+0x10/0x10 [ 24.129866] ? security_mmap_addr+0x7d/0xa0 [ 24.130424] ? get_unmapped_area+0x1f5/0x3f0 [ 24.131008] do_mmap+0x854/0xf00 [ 24.131485] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.131999] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.132586] ksys_mmap_pgoff+0x3af/0x500 [ 24.133129] do_syscall_64+0x3f/0x90 [ 24.133627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.134320] RIP: 0033:0x7fe22eeb5d82 [ 24.134787] 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 [ 24.137015] RSP: 002b:00007ffcdd0b84d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.137953] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe22eeb5d82 [ 24.138860] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe22e2ef000 [ 24.139721] RBP: 00007fe22e2ef000 R08: 0000000000000009 R09: 0000000000001000 [ 24.140587] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a7f4a34ec0 [ 24.141438] R13: 00007ffcdd0b84f0 R14: 00007ffcdd0b8520 R15: 00007ffcdd0b8880 [ 24.142374] [ 24.142696] [ 24.142923] Allocated by task 212: [ 24.143357] kasan_save_stack+0x22/0x50 [ 24.143876] kasan_set_track+0x25/0x30 [ 24.144377] __kasan_slab_alloc+0x59/0x70 [ 24.144915] kmem_cache_alloc+0x16b/0x370 [ 24.145436] vm_area_dup+0x20/0x160 [ 24.145903] __split_vma+0x170/0x950 [ 24.146393] split_vma+0xc6/0x110 [ 24.146845] mprotect_fixup+0x8d2/0xb30 [ 24.147360] do_mprotect_pkey+0x87e/0xd40 [ 24.147894] __x64_sys_mprotect+0x78/0xc0 [ 24.148431] do_syscall_64+0x3f/0x90 [ 24.148914] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.149583] [ 24.149804] Freed by task 20: [ 24.150213] kasan_save_stack+0x22/0x50 [ 24.150731] kasan_set_track+0x25/0x30 [ 24.151236] kasan_save_free_info+0x2b/0x50 [ 24.151781] __kasan_slab_free+0x10a/0x190 [ 24.152328] kmem_cache_free+0x10d/0x4d0 [ 24.152858] rcu_core+0x8c8/0x2860 [ 24.153314] __do_softirq+0x1b7/0x7d4 [ 24.153815] [ 24.154043] Last potentially related work creation: [ 24.154648] kasan_save_stack+0x22/0x50 [ 24.155159] __kasan_record_aux_stack+0x8e/0xa0 [ 24.155743] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.156391] remove_vma+0x139/0x170 [ 24.156858] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.157422] do_vmi_munmap+0x1f1/0x2b0 [ 24.157919] __vm_munmap+0x138/0x3a0 [ 24.158425] __x64_sys_munmap+0x59/0x80 [ 24.158935] do_syscall_64+0x3f/0x90 [ 24.159416] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.160078] [ 24.160294] Second to last potentially related work creation: [ 24.160988] kasan_save_stack+0x22/0x50 [ 24.161494] __kasan_record_aux_stack+0x8e/0xa0 [ 24.162090] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.162741] remove_vma+0x139/0x170 [ 24.163213] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.163766] do_vmi_munmap+0x1f1/0x2b0 [ 24.164263] mmap_region+0x1f9/0x2660 [ 24.164751] do_mmap+0x854/0xf00 [ 24.165184] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.165695] ksys_mmap_pgoff+0x3af/0x500 [ 24.166217] do_syscall_64+0x3f/0x90 [ 24.166696] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.167360] [ 24.167584] The buggy address belongs to the object at ffff88800d3d9cb0 [ 24.167584] which belongs to the cache vm_area_struct of size 168 [ 24.169078] The buggy address is located 88 bytes inside of [ 24.169078] freed 168-byte region [ffff88800d3d9cb0, ffff88800d3d9d58) [ 24.170503] [ 24.170727] The buggy address belongs to the physical page: [ 24.171380] page:000000008ec40e66 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd3d9 [ 24.172478] memcg:ffff88800eda5501 [ 24.172922] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.173567] page_type: 0xffffffff() [ 24.174047] raw: 0100000000000200 ffff8880087a0c80 ffffea000039e700 dead000000000006 [ 24.174979] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eda5501 [ 24.175900] page dumped because: kasan: bad access detected [ 24.176568] [ 24.176787] Memory state around the buggy address: [ 24.177376] ffff88800d3d9c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.178271] ffff88800d3d9c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.179153] >ffff88800d3d9d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.180015] ^ [ 24.180470] ffff88800d3d9d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.181333] ffff88800d3d9e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 24.182202] ================================================================== [ 24.183197] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.151059] BUG: Bad rss-counter state mm:00000000a622c472 type:MM_FILEPAGES val:33 [ 26.152278] BUG: Bad rss-counter state mm:00000000a622c472 type:MM_ANONPAGES val:22 [ 26.560646] BUG: Bad rss-counter state mm:000000001c76e09a type:MM_FILEPAGES val:33 [ 26.561884] BUG: Bad rss-counter state mm:000000001c76e09a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16985' (ECDSA) to the list of known hosts. 2023/06/20 17:21:37 fuzzer started 2023/06/20 17:21:37 dialing manager at localhost:36067 2023/06/20 17:21:38 checking machine... 2023/06/20 17:21:38 checking revisions... [ 27.295069] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:21:38 testing simple program... [ 27.338228] cgroup: Unknown subsys name 'net' [ 27.377575] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:21:37 Registers: info registers vcpu 0 RAX=0000000000000010 RBX=ffff88800fe67558 RCX=0000000000000001 RDX=1ffff11001fccec3 RSI=ffffffff83641c44 RDI=ffff88800fe67564 RBP=ffff88800fe67618 RSP=ffff88800fe67470 R8 =0000000000000001 R9 =ffff88800fe674d0 R10=0000000000038001 R11=000000000008ab47 R12=ffff88800fe67558 R13=0000000000000000 R14=ffff888016fd0000 R15=ffff88800fc30850 RIP=ffffffff813ad553 RFL=00000283 [--S---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 00007f1a519b5900 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=00007f1a51f6c618 CR3=00000000185fe000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f1b17671000 CR3=000000000daca000 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=2037333a31323a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a31323a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000