[ 52.340807] BUG: Bad rss-counter state mm:0000000006724db2 type:MM_FILEPAGES val:33 [ 52.341517] BUG: Bad rss-counter state mm:0000000006724db2 type:MM_ANONPAGES val:22 [ 52.414838] ================================================================== [ 52.415482] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 52.424386] Read of size 8 at addr ffff88800de9e310 by task sshd/220 [ 52.424928] [ 52.425087] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 52.425690] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 52.426363] Call Trace: [ 52.426596] [ 52.426802] dump_stack_lvl+0x91/0xf0 [ 52.427157] print_report+0xcc/0x620 [ 52.427506] ? __virt_addr_valid+0x102/0x340 [ 52.427895] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.428380] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.428815] kasan_report+0xbe/0xf0 [ 52.429162] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.429608] vma_interval_tree_remove+0xc75/0xec0 [ 52.430034] vma_prepare+0xc54/0x11a0 [ 52.430379] __split_vma+0x5af/0x950 [ 52.430723] ? __pfx___split_vma+0x10/0x10 [ 52.431105] ? find_held_lock+0x2c/0x110 [ 52.431483] do_vmi_align_munmap+0x2ba/0x11f0 [ 52.431887] ? lock_is_held_type+0x9f/0x120 [ 52.432294] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 52.432728] ? mtree_range_walk+0x632/0x900 [ 52.433124] ? mas_walk+0x5c7/0x7c0 [ 52.433465] do_vmi_munmap+0x1f1/0x2b0 [ 52.433821] mmap_region+0x1f9/0x2660 [ 52.434168] ? vm_mmap_pgoff+0x15c/0x3a0 [ 52.434542] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 52.435049] ? __pfx_lock_acquire+0x10/0x10 [ 52.435430] ? __pfx_mmap_region+0x10/0x10 [ 52.435806] ? security_mmap_addr+0x7d/0xa0 [ 52.436226] ? get_unmapped_area+0x1f5/0x3f0 [ 52.436608] do_mmap+0x854/0xf00 [ 52.436924] vm_mmap_pgoff+0x1a6/0x3a0 [ 52.437282] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 52.437681] ksys_mmap_pgoff+0x3af/0x500 [ 52.438043] do_syscall_64+0x3f/0x90 [ 52.438390] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.438850] RIP: 0033:0x7f24fc7e5d82 [ 52.439178] 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 [ 52.440677] RSP: 002b:00007fff1e852f68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 52.441315] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f24fc7e5d82 [ 52.441911] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f24fbc1f000 [ 52.442534] RBP: 00007f24fbc1f000 R08: 0000000000000009 R09: 0000000000001000 [ 52.443125] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bd50efaec0 [ 52.443840] R13: 00007fff1e852f80 R14: 00007fff1e852fb0 R15: 00007fff1e853310 [ 52.444506] [ 52.444713] [ 52.444868] Allocated by task 213: [ 52.445161] kasan_save_stack+0x22/0x50 [ 52.445517] kasan_set_track+0x25/0x30 [ 52.445856] __kasan_slab_alloc+0x59/0x70 [ 52.446206] kmem_cache_alloc+0x16b/0x370 [ 52.446593] vm_area_dup+0x20/0x160 [ 52.446903] __split_vma+0x170/0x950 [ 52.447216] split_vma+0xc6/0x110 [ 52.447519] mprotect_fixup+0x8d2/0xb30 [ 52.447856] do_mprotect_pkey+0x87e/0xd40 [ 52.448259] __x64_sys_mprotect+0x78/0xc0 [ 52.448633] do_syscall_64+0x3f/0x90 [ 52.448955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.449387] [ 52.449536] Freed by task 19: [ 52.449791] kasan_save_stack+0x22/0x50 [ 52.450122] kasan_set_track+0x25/0x30 [ 52.450459] kasan_save_free_info+0x2b/0x50 [ 52.450817] __kasan_slab_free+0x10a/0x190 [ 52.451175] kmem_cache_free+0x10d/0x4d0 [ 52.451515] rcu_core+0x8c8/0x2860 [ 52.451813] __do_softirq+0x1b7/0x7d4 [ 52.456226] [ 52.456378] Last potentially related work creation: [ 52.456759] kasan_save_stack+0x22/0x50 [ 52.457099] __kasan_record_aux_stack+0x8e/0xa0 [ 52.457481] __call_rcu_common.constprop.0+0x6a/0xb90 [ 52.457910] remove_vma+0x139/0x170 [ 52.458213] do_vmi_align_munmap+0xd4a/0x11f0 [ 52.458584] do_vmi_munmap+0x1f1/0x2b0 [ 52.458909] __vm_munmap+0x138/0x3a0 [ 52.459224] __x64_sys_munmap+0x59/0x80 [ 52.459553] do_syscall_64+0x3f/0x90 [ 52.459872] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.460335] [ 52.460489] Second to last potentially related work creation: [ 52.460935] kasan_save_stack+0x22/0x50 [ 52.461275] __kasan_record_aux_stack+0x8e/0xa0 [ 52.461655] __call_rcu_common.constprop.0+0x6a/0xb90 [ 52.462084] remove_vma+0x139/0x170 [ 52.462377] do_vmi_align_munmap+0xd4a/0x11f0 [ 52.462752] do_vmi_munmap+0x1f1/0x2b0 [ 52.463081] mmap_region+0x1f9/0x2660 [ 52.463410] do_mmap+0x854/0xf00 [ 52.463703] vm_mmap_pgoff+0x1a6/0x3a0 [ 52.464064] ksys_mmap_pgoff+0x3af/0x500 [ 52.464404] do_syscall_64+0x3f/0x90 [ 52.464726] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.465195] [ 52.465344] The buggy address belongs to the object at ffff88800de9e2b8 [ 52.465344] which belongs to the cache vm_area_struct of size 168 [ 52.466298] The buggy address is located 88 bytes inside of [ 52.466298] freed 168-byte region [ffff88800de9e2b8, ffff88800de9e360) [ 52.467212] [ 52.467361] The buggy address belongs to the physical page: [ 52.467792] page:00000000c07cf0c2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde9e [ 52.471995] memcg:ffff88800eafa901 [ 52.472849] flags: 0x100000000000200(slab|node=0|zone=1) [ 52.474167] page_type: 0xffffffff() [ 52.475061] raw: 0100000000000200 ffff88800879fc80 ffffea000032ddc0 dead000000000008 [ 52.477120] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eafa901 [ 52.478978] page dumped because: kasan: bad access detected [ 52.480450] [ 52.480844] Memory state around the buggy address: [ 52.482014] ffff88800de9e200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 52.483829] ffff88800de9e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 52.485717] >ffff88800de9e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 52.487563] ^ [ 52.488663] ffff88800de9e380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 52.490496] ffff88800de9e400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 52.492344] ================================================================== [ 52.494353] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 56.361851] BUG: Bad rss-counter state mm:000000007e4db6e8 type:MM_FILEPAGES val:33 [ 56.362555] BUG: Bad rss-counter state mm:000000007e4db6e8 type:MM_ANONPAGES val:22 [ 57.010829] BUG: Bad rss-counter state mm:00000000cd5f8a05 type:MM_FILEPAGES val:33 [ 57.011555] BUG: Bad rss-counter state mm:00000000cd5f8a05 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30283' (ECDSA) to the list of known hosts. 2023/06/20 08:16:41 fuzzer started 2023/06/20 08:16:42 dialing manager at localhost:44161 2023/06/20 08:16:42 checking machine... 2023/06/20 08:16:42 checking revisions... [ 57.826809] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:16:42 testing simple program... [ 57.886517] cgroup: Unknown subsys name 'net' [ 57.953173] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:16:28 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888015b46460 RCX=0000000000000000 RDX=1ffffd40000338a1 RSI=ffffffff817aae40 RDI=ffffea000019c508 RBP=ffffea000019c500 RSP=ffff88800da77b60 R8 =0000000000000004 R9 =00000000000001fe R10=0000000000000089 R11=00000000000b6996 R12=ffffea000019c4c8 R13=dffffc0000000000 R14=ffff888015b46010 R15=00000000000001fe RIP=ffffffff817aae63 RFL=00000246 [---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 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=000055dd971f7040 CR3=000000000cd34000 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=2031343a36313a3830203032206e754a XMM01=206e6f697463656e6e6f43203a5d3034 XMM02=302e3031207962206465736f6c63206e XMM03=646873732072656c6c616b7a79732031 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a36313a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ba77db RBX=000000000000000a RCX=ffffffff84531dd2 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff888008e57e48 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=0000000000000100 R13=0000000000000009 R14=0000000000000200 R15=0000000000000009 RIP=ffffffff8180efaf 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 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=00007f4f00e9cc50 CR3=00000000096d8000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=74d741491dadb01c0000000000137438 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=cd8db374c9cfac8c00000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000