[ 31.150892] BUG: Bad rss-counter state mm:000000002fbc76f0 type:MM_FILEPAGES val:33 [ 31.153324] BUG: Bad rss-counter state mm:000000002fbc76f0 type:MM_ANONPAGES val:22 [ 31.319365] ================================================================== [ 31.320277] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.321219] Read of size 8 at addr ffff888009b4b880 by task sshd/220 [ 31.322048] [ 31.322349] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.323233] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.324217] Call Trace: [ 31.324557] [ 31.324845] dump_stack_lvl+0x91/0xf0 [ 31.325340] print_report+0xcc/0x620 [ 31.325834] ? __virt_addr_valid+0x102/0x340 [ 31.326397] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.327047] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.327668] kasan_report+0xbe/0xf0 [ 31.328150] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.328781] vma_interval_tree_remove+0xc75/0xec0 [ 31.329394] vma_prepare+0xc54/0x11a0 [ 31.329878] __split_vma+0x5af/0x950 [ 31.330354] ? __pfx___split_vma+0x10/0x10 [ 31.330908] ? find_held_lock+0x2c/0x110 [ 31.331436] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.332010] ? lock_is_held_type+0x9f/0x120 [ 31.332555] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.333170] ? mtree_range_walk+0x632/0x900 [ 31.333740] ? mas_walk+0x5c7/0x7c0 [ 31.334223] do_vmi_munmap+0x1f1/0x2b0 [ 31.334743] mmap_region+0x1f9/0x2660 [ 31.335228] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.335752] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.336472] ? __pfx_lock_acquire+0x10/0x10 [ 31.337015] ? __pfx_mmap_region+0x10/0x10 [ 31.337552] ? security_mmap_addr+0x7d/0xa0 [ 31.338096] ? get_unmapped_area+0x1f5/0x3f0 [ 31.338677] do_mmap+0x854/0xf00 [ 31.339122] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.339625] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.340194] ksys_mmap_pgoff+0x3af/0x500 [ 31.340708] do_syscall_64+0x3f/0x90 [ 31.341191] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.341861] RIP: 0033:0x7fae5ce2cd82 [ 31.342323] 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 [ 31.344482] RSP: 002b:00007ffcc6c31f88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.345395] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fae5ce2cd82 [ 31.346251] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fae5c266000 [ 31.347107] RBP: 00007fae5c266000 R08: 0000000000000009 R09: 0000000000001000 [ 31.347975] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563e65a1bec0 [ 31.348839] R13: 00007ffcc6c31fa0 R14: 00007ffcc6c31fd0 R15: 00007ffcc6c32330 [ 31.349707] [ 31.350004] [ 31.350224] Allocated by task 213: [ 31.350669] kasan_save_stack+0x22/0x50 [ 31.351188] kasan_set_track+0x25/0x30 [ 31.351686] __kasan_slab_alloc+0x59/0x70 [ 31.352218] kmem_cache_alloc+0x16b/0x370 [ 31.352751] vm_area_dup+0x20/0x160 [ 31.353212] __split_vma+0x170/0x950 [ 31.353685] split_vma+0xc6/0x110 [ 31.354130] mprotect_fixup+0x8d2/0xb30 [ 31.354647] do_mprotect_pkey+0x87e/0xd40 [ 31.355183] __x64_sys_mprotect+0x78/0xc0 [ 31.355713] do_syscall_64+0x3f/0x90 [ 31.356200] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.356856] [ 31.357082] Freed by task 213: [ 31.357483] kasan_save_stack+0x22/0x50 [ 31.357999] kasan_set_track+0x25/0x30 [ 31.358498] kasan_save_free_info+0x2b/0x50 [ 31.359059] __kasan_slab_free+0x10a/0x190 [ 31.359607] kmem_cache_free+0x10d/0x4d0 [ 31.360130] rcu_core+0x8c8/0x2860 [ 31.360586] __do_softirq+0x1b7/0x7d4 [ 31.361079] [ 31.361304] Last potentially related work creation: [ 31.361909] kasan_save_stack+0x22/0x50 [ 31.362417] __kasan_record_aux_stack+0x8e/0xa0 [ 31.363003] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.363657] remove_vma+0x139/0x170 [ 31.364119] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.364690] do_vmi_munmap+0x1f1/0x2b0 [ 31.365186] __vm_munmap+0x138/0x3a0 [ 31.365665] __x64_sys_munmap+0x59/0x80 [ 31.366174] do_syscall_64+0x3f/0x90 [ 31.366663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.367320] [ 31.367537] Second to last potentially related work creation: [ 31.368234] kasan_save_stack+0x22/0x50 [ 31.368753] __kasan_record_aux_stack+0x8e/0xa0 [ 31.369330] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.369988] remove_vma+0x139/0x170 [ 31.370450] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.371028] do_vmi_munmap+0x1f1/0x2b0 [ 31.371519] mmap_region+0x1f9/0x2660 [ 31.372000] do_mmap+0x854/0xf00 [ 31.372434] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.372937] ksys_mmap_pgoff+0x3af/0x500 [ 31.373444] do_syscall_64+0x3f/0x90 [ 31.373926] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.374585] [ 31.374808] The buggy address belongs to the object at ffff888009b4b828 [ 31.374808] which belongs to the cache vm_area_struct of size 168 [ 31.376296] The buggy address is located 88 bytes inside of [ 31.376296] freed 168-byte region [ffff888009b4b828, ffff888009b4b8d0) [ 31.377727] [ 31.377948] The buggy address belongs to the physical page: [ 31.378632] page:00000000c92a7e3e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9b4b [ 31.379730] memcg:ffff88800dfba401 [ 31.380160] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.380889] page_type: 0xffffffff() [ 31.381351] raw: 0100000000000200 ffff8880087a0c80 ffffea0000684780 dead000000000005 [ 31.382291] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfba401 [ 31.383233] page dumped because: kasan: bad access detected [ 31.383912] [ 31.384134] Memory state around the buggy address: [ 31.384721] ffff888009b4b780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.385596] ffff888009b4b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.386470] >ffff888009b4b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.387336] ^ [ 31.387756] ffff888009b4b900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.388651] ffff888009b4b980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.389533] ================================================================== [ 31.390717] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.341716] BUG: Bad rss-counter state mm:00000000266a1bb6 type:MM_FILEPAGES val:33 [ 33.342998] BUG: Bad rss-counter state mm:00000000266a1bb6 type:MM_ANONPAGES val:22 [ 33.825785] BUG: Bad rss-counter state mm:000000002d1af516 type:MM_FILEPAGES val:33 [ 33.826795] BUG: Bad rss-counter state mm:000000002d1af516 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26355' (ECDSA) to the list of known hosts. 2023/06/21 08:43:31 fuzzer started 2023/06/21 08:43:31 dialing manager at localhost:36067 2023/06/21 08:43:31 checking machine... 2023/06/21 08:43:31 checking revisions... [ 34.565893] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:43:31 testing simple program... [ 34.626251] cgroup: Unknown subsys name 'net' [ 34.709462] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:43:31 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000283 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff84535ffc RBP=ffff88800844e900 RSP=ffff8880158b77a8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=ffff88800dadd850 R12=ffffea000036b740 R13=ffffea0000356c40 R14=ffff88800844e900 R15=ffff888013591980 RIP=ffffffff84511935 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 00007fa125938900 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=00007fa124e57040 CR3=000000000cb46000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=6dd2923ed26c8f0f00000000000ae988 XMM05=851acc519214c6770000000000133dc8 XMM06=19e9129bd510f23500000000001328f0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000009 RCX=ffffffff813782c0 RDX=1ffff11003451bba RSI=0000000000000000 RDI=ffff88801a28ddd0 RBP=000000000000000a RSP=ffff888008e37cf8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=dffffc0000000000 R13=ffff88801a28dd90 R14=ffff88801a28dd10 R15=dffffc0000000000 RIP=ffffffff81845e46 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 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=00007fffa75f6000 CR3=000000000ef32000 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=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