[ 24.120213] BUG: Bad rss-counter state mm:00000000494832c1 type:MM_FILEPAGES val:33 [ 24.121518] BUG: Bad rss-counter state mm:00000000494832c1 type:MM_ANONPAGES val:22 [ 24.260787] ================================================================== [ 24.261860] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.262976] Read of size 8 at addr ffff88800deba5c8 by task sshd/218 [ 24.264020] [ 24.264317] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.265347] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.266532] Call Trace: [ 24.266908] [ 24.267201] dump_stack_lvl+0x91/0xf0 [ 24.267701] print_report+0xcc/0x620 [ 24.268187] ? __virt_addr_valid+0x102/0x340 [ 24.268763] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.269396] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.270024] kasan_report+0xbe/0xf0 [ 24.270516] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.271139] vma_interval_tree_remove+0xc75/0xec0 [ 24.271805] vma_prepare+0xc54/0x11a0 [ 24.272315] __split_vma+0x5af/0x950 [ 24.272876] ? __pfx___split_vma+0x10/0x10 [ 24.273518] ? find_held_lock+0x2c/0x110 [ 24.274154] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.274852] ? lock_is_held_type+0x9f/0x120 [ 24.275520] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.276261] ? mtree_range_walk+0x632/0x900 [ 24.276974] ? mas_walk+0x5c7/0x7c0 [ 24.277558] do_vmi_munmap+0x1f1/0x2b0 [ 24.278146] mmap_region+0x1f9/0x2660 [ 24.278730] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.279353] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.280212] ? __pfx_lock_acquire+0x10/0x10 [ 24.280876] ? __pfx_mmap_region+0x10/0x10 [ 24.281502] ? security_mmap_addr+0x7d/0xa0 [ 24.282137] ? get_unmapped_area+0x1f5/0x3f0 [ 24.282795] do_mmap+0x854/0xf00 [ 24.283315] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.283910] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.284591] ksys_mmap_pgoff+0x3af/0x500 [ 24.285208] do_syscall_64+0x3f/0x90 [ 24.285786] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.286566] RIP: 0033:0x7f379cb9cd82 [ 24.287116] 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 [ 24.289392] RSP: 002b:00007ffe5cd813f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.290295] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f379cb9cd82 [ 24.291144] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f379bfd6000 [ 24.291987] RBP: 00007f379bfd6000 R08: 0000000000000009 R09: 0000000000001000 [ 24.292826] R10: 0000000000000812 R11: 0000000000000206 R12: 000055893eb04f70 [ 24.293664] R13: 00007ffe5cd81410 R14: 00007ffe5cd81440 R15: 00007ffe5cd817a0 Debian GNU/Li[ 24.294519] [ 24.295116] [ 24.295334] Allocated by task 211: [ 24.295760] kasan_save_stack+0x22/0x50 [ 24.296263] kasan_set_track+0x25/0x30 [ 24.296778] __kasan_slab_alloc+0x59/0x70 [ 24.297312] kmem_cache_alloc+0x16b/0x370 [ 24.297862] vm_area_dup+0x20/0x160 [ 24.298382] __split_vma+0x170/0x950 [ 24.298908] split_vma+0xc6/0x110 [ 24.299388] mprotect_fixup+0x8d2/0xb30 [ 24.299889] do_mprotect_pkey+0x87e/0xd40 [ 24.300418] __x64_sys_mprotect+0x78/0xc0 [ 24.300932] do_syscall_64+0x3f/0x90 [ 24.301405] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.302044] [ 24.302257] Freed by task 211: [ 24.302646] kasan_save_stack+0x22/0x50 [ 24.303143] kasan_set_track+0x25/0x30 [ 24.303636] kasan_save_free_info+0x2b/0x50 [ 24.304163] __kasan_slab_free+0x10a/0x190 [ 24.304702] kmem_cache_free+0x10d/0x4d0 [ 24.305266] rcu_core+0x8c8/0x2860 [ 24.305714] __do_softirq+0x1b7/0x7d4 [ 24.306188] [ 24.306402] Last potentially related work creation: [ 24.306981] kasan_save_stack+0x22/0x50 [ 24.307483] __kasan_record_aux_stack+0x8e/0xa0 [ 24.308059] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.308714] remove_vma+0x139/0x170 [ 24.309159] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.309718] do_vmi_munmap+0x1f1/0x2b0 [ 24.310199] __vm_munmap+0x138/0x3a0 [ 24.310658] __x64_sys_munmap+0x59/0x80 [ 24.311154] do_syscall_64+0x3f/0x90 [ 24.311630] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.312274] [ 24.312498] Second to last potentially related work creation: [ 24.313187] kasan_save_stack+0x22/0x50 [ 24.313682] __kasan_record_aux_stack+0x8e/0xa0 [ 24.314265] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.314897] remove_vma+0x139/0x170 [ 24.315345] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.315897] do_vmi_munmap+0x1f1/0x2b0 [ 24.316407] mmap_region+0x1f9/0x2660 [ 24.316879] do_mmap+0x854/0xf00 [ 24.317305] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.317788] ksys_mmap_pgoff+0x3af/0x500 [ 24.318284] do_syscall_64+0x3f/0x90 [ 24.318759] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.319406] [ 24.319620] The buggy address belongs to the object at ffff88800deba570 [ 24.319620] which belongs to the cache vm_area_struct of size 168 [ 24.321111] The buggy address is located 88 bytes inside of [ 24.321111] freed 168-byte region [ffff88800deba570, ffff88800deba618) [ 24.322498] [ 24.322712] The buggy address belongs to the physical page: [ 24.323362] page:000000009cf32bfd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdeba [ 24.324447] memcg:ffff88800dfc5301 [ 24.324891] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.325654] page_type: 0xffffffff() [ 24.326138] raw: 0100000000000200 ffff8880087a0c80 ffffea00003932c0 dead000000000008 [ 24.327184] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfc5301 [ 24.328161] page dumped because: kasan: bad access detected [ 24.328851] [ 24.329067] Memory state around the buggy address: [ 24.329643] ffff88800deba480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.330502] ffff88800deba500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 24.331348] >ffff88800deba580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.332193] ^ [ 24.332929] ffff88800deba600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 24.333813] ffff88800deba680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.334796] ================================================================== nux 11 syzkaller ttyS0 syzkaller login: [ 24.336480] Disabling lock debugging due to kernel taint [ 26.101388] BUG: Bad rss-counter state mm:000000005fb0eb02 type:MM_FILEPAGES val:33 [ 26.102454] BUG: Bad rss-counter state mm:000000005fb0eb02 type:MM_ANONPAGES val:22 [ 26.694577] BUG: Bad rss-counter state mm:000000004d4f0203 type:MM_FILEPAGES val:33 [ 26.695887] BUG: Bad rss-counter state mm:000000004d4f0203 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41238' (ECDSA) to the list of known hosts. 2023/06/21 05:39:25 fuzzer started 2023/06/21 05:39:25 dialing manager at localhost:36067 2023/06/21 05:39:25 checking machine... 2023/06/21 05:39:25 checking revisions... [ 27.355201] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:39:25 testing simple program... [ 27.423057] cgroup: Unknown subsys name 'net' [ 27.478509] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:39:24 Registers: info registers vcpu 0 RAX=ffffffff8118d7d9 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008d9f9c0 RSI=ffffffff8118d7d9 RDI=ffff888008d9f978 RBP=ffff888008d9f9d0 RSP=ffff888008d9f908 R8 =0000000000000001 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=00000000000b5d59 R12=ffff888008d9fa40 R13=ffff888008d9f9c0 R14=ffff888008d90000 R15=ffff888008d9f978 RIP=ffffffff81130641 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=0000557591b72110 CR3=000000000a100000 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=2034323a39333a3530203132206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a39333a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff888014677858 RSI=ffff888014677820 RDI=ffff888014677348 RBP=ffff8880146773d0 RSP=ffff888014677338 R8 =0000000000000001 R9 =ffff888014677378 R10=0000000000038001 R11=000000000008b8ed R12=ffff888014677400 R13=0000000000000000 R14=ffff8880145e0000 R15=0000000000400cc0 RIP=ffffffff810bd057 RFL=00000296 [--S-AP-] 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 00007f2761b5a900 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=00007f397f9cb650 CR3=000000000d71e000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=6bd166de4079435800000000000ae988 XMM05=a1a7bcafa0974f2d0000000000133fe8 XMM06=bdf2e299e47b49d50000000000132798 XMM07=fb795ef6d65770560000000000121a50 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000