[ 30.100236] BUG: Bad rss-counter state mm:0000000032d2aede type:MM_FILEPAGES val:33 [ 30.101590] BUG: Bad rss-counter state mm:0000000032d2aede type:MM_ANONPAGES val:22 [ 30.243805] ================================================================== [ 30.244708] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.245645] Read of size 8 at addr ffff88800f38f310 by task sshd/219 [ 30.246401] [ 30.246613] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.247554] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.248526] Call Trace: [ 30.248842] <TASK> [ 30.249121] dump_stack_lvl+0x91/0xf0 [ 30.249627] print_report+0xcc/0x620 [ 30.250104] ? __virt_addr_valid+0x102/0x340 [ 30.250643] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.251275] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.251891] kasan_report+0xbe/0xf0 [ 30.252361] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.252978] vma_interval_tree_remove+0xc75/0xec0 [ 30.253583] vma_prepare+0xc54/0x11a0 [ 30.254051] __split_vma+0x5af/0x950 [ 30.254524] ? __pfx___split_vma+0x10/0x10 [ 30.255054] ? find_held_lock+0x2c/0x110 [ 30.255562] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.256113] ? lock_is_held_type+0x9f/0x120 [ 30.256642] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.257233] ? mtree_range_walk+0x632/0x900 [ 30.257778] ? mas_walk+0x5c7/0x7c0 [ 30.258248] do_vmi_munmap+0x1f1/0x2b0 [ 30.258737] mmap_region+0x1f9/0x2660 [ 30.259228] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.259735] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.260438] ? __pfx_lock_acquire+0x10/0x10 [ 30.260958] ? __pfx_mmap_region+0x10/0x10 [ 30.261477] ? security_mmap_addr+0x7d/0xa0 [ 30.262001] ? get_unmapped_area+0x1f5/0x3f0 [ 30.262549] do_mmap+0x854/0xf00 [ 30.262997] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.263487] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.264044] ksys_mmap_pgoff+0x3af/0x500 [ 30.264545] do_syscall_64+0x3f/0x90 [ 30.265016] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.265652] RIP: 0033:0x7f31a5525d82 [ 30.266103] 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 [ 30.268221] RSP: 002b:00007fffaa61a6f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.269107] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f31a5525d82 [ 30.269962] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f31a495f000 [ 30.270805] RBP: 00007f31a495f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.271648] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f177809ec0 [ 30.272476] R13: 00007fffaa61a710 R14: 00007fffaa61a740 R15: 00007fffaa61aaa0 [ 30.273320] </TASK> [ 30.273614] [ 30.273827] Allocated by task 212: [ 30.274253] kasan_save_stack+0x22/0x50 [ 30.274763] kasan_set_track+0x25/0x30 [ 30.275271] __kasan_slab_alloc+0x59/0x70 [ 30.275794] kmem_cache_alloc+0x16b/0x370 [ 30.276304] vm_area_dup+0x20/0x160 [ 30.276757] __split_vma+0x170/0x950 [ 30.277223] split_vma+0xc6/0x110 [ 30.277655] mprotect_fixup+0x8d2/0xb30 [ 30.278147] do_mprotect_pkey+0x87e/0xd40 [ 30.278660] __x64_sys_mprotect+0x78/0xc0 [ 30.279174] do_syscall_64+0x3f/0x90 [ 30.279642] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.280289] [ 30.280511] Freed by task 212: [ 30.280898] kasan_save_stack+0x22/0x50 [ 30.281390] kasan_set_track+0x25/0x30 [ 30.281875] kasan_save_free_info+0x2b/0x50 [ 30.282401] __kasan_slab_free+0x10a/0x190 [ 30.282944] kmem_cache_free+0x10d/0x4d0 [ 30.283458] rcu_core+0x8c8/0x2860 [ 30.283895] __do_softirq+0x1b7/0x7d4 [ 30.284364] [ 30.284577] Last potentially related work creation: [ 30.285155] kasan_save_stack+0x22/0x50 [ 30.285651] __kasan_record_aux_stack+0x8e/0xa0 [ 30.286215] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.286850] remove_vma+0x139/0x170 [ 30.287297] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.287849] do_vmi_munmap+0x1f1/0x2b0 [ 30.288327] __vm_munmap+0x138/0x3a0 [ 30.288784] __x64_sys_munmap+0x59/0x80 [ 30.289270] do_syscall_64+0x3f/0x90 [ 30.289741] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.290377] [ 30.290588] The buggy address belongs to the object at ffff88800f38f2b8 [ 30.290588] which belongs to the cache vm_area_struct of size 168 [ 30.292045] The buggy address is located 88 bytes inside of [ 30.292045] freed 168-byte region [ffff88800f38f2b8, ffff88800f38f360) [ 30.293418] [ 30.293630] The buggy address belongs to the physical page: [ 30.294278] page:00000000f2f3c22a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf38f [ 30.295368] memcg:ffff88801a712e01 [ 30.295789] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.296430] page_type: 0xffffffff() [ 30.296875] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.297785] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a712e01 [ 30.298676] page dumped because: kasan: bad access detected [ 30.299337] [ 30.299548] Memory state around the buggy address: [ 30.300125] ffff88800f38f200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.300971] ffff88800f38f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.301820] >ffff88800f38f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.302658] ^ [ 30.303135] ffff88800f38f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.303977] ffff88800f38f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.304817] ================================================================== [ 30.305819] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.954019] BUG: Bad rss-counter state mm:00000000f435fde8 type:MM_FILEPAGES val:33 [ 31.955042] BUG: Bad rss-counter state mm:00000000f435fde8 type:MM_ANONPAGES val:22 [ 32.546399] BUG: Bad rss-counter state mm:000000003c5e4282 type:MM_FILEPAGES val:33 [ 32.547587] BUG: Bad rss-counter state mm:000000003c5e4282 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62306' (ECDSA) to the list of known hosts. 2023/06/20 12:18:36 fuzzer started 2023/06/20 12:18:36 dialing manager at localhost:36067 2023/06/20 12:18:36 checking machine... 2023/06/20 12:18:36 checking revisions... [ 33.152689] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:18:36 testing simple program... [ 33.202273] cgroup: Unknown subsys name 'net' [ 33.243102] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:18:36 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000002 RCX=ffffffff8386aebf RDX=ffffed10011ece11 RSI=0000000000000004 RDI=ffff888008f67080 RBP=1ffff11001fddf50 RSP=ffff88800feefa80 R8 =0000000000000001 R9 =ffffed10011ece10 R10=ffff888008f67083 R11=656d616e74736f68 R12=ffff888008f67000 R13=ffff888008f67080 R14=ffffffff87f97640 R15=ffff88800feefaa0 RIP=ffffffff8386aec9 RFL=00000206 [-----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 00007f8c3043a900 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=00007ffcce82d000 CR3=000000000e81c000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=0000000000000001 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=00007f8c309f1618 CR3=000000000c5d6000 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=2036333a38313a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a38313a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000