[ 33.937663] BUG: Bad rss-counter state mm:0000000060239bbe type:MM_FILEPAGES val:33 [ 33.938534] BUG: Bad rss-counter state mm:0000000060239bbe type:MM_ANONPAGES val:22 [ 34.098686] ================================================================== [ 34.099646] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.100589] Read of size 8 at addr ffff88800d95a6b0 by task sshd/220 [ 34.101368] [ 34.101611] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.102542] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.103576] Call Trace: [ 34.103920] [ 34.104213] dump_stack_lvl+0x91/0xf0 [ 34.104717] print_report+0xcc/0x620 [ 34.105207] ? __virt_addr_valid+0x102/0x340 [ 34.105768] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.106403] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.107037] kasan_report+0xbe/0xf0 [ 34.107535] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.108166] vma_interval_tree_remove+0xc75/0xec0 [ 34.108779] vma_prepare+0xc54/0x11a0 [ 34.109266] __split_vma+0x5af/0x950 [ 34.109747] ? __pfx___split_vma+0x10/0x10 [ 34.110282] ? find_held_lock+0x2c/0x110 [ 34.110817] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.111398] ? lock_is_held_type+0x9f/0x120 [ 34.111946] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.112564] ? mtree_range_walk+0x632/0x900 [ 34.113121] ? mas_walk+0x5c7/0x7c0 [ 34.113597] do_vmi_munmap+0x1f1/0x2b0 [ 34.114108] mmap_region+0x1f9/0x2660 [ 34.114595] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.115120] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.115867] ? __pfx_lock_acquire+0x10/0x10 [ 34.116414] ? __pfx_mmap_region+0x10/0x10 [ 34.116961] ? security_mmap_addr+0x7d/0xa0 [ 34.117507] ? get_unmapped_area+0x1f5/0x3f0 [ 34.118071] do_mmap+0x854/0xf00 [ 34.118522] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.119023] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.119604] ksys_mmap_pgoff+0x3af/0x500 [ 34.120120] do_syscall_64+0x3f/0x90 [ 34.120606] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.121260] RIP: 0033:0x7fb8946a2d82 [ 34.121726] 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 [ 34.123871] RSP: 002b:00007ffcd98b8868 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.124793] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb8946a2d82 [ 34.125654] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb893adc000 [ 34.126519] RBP: 00007fb893adc000 R08: 0000000000000009 R09: 0000000000001000 [ 34.127386] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561800851b20 [ 34.128250] R13: 00007ffcd98b8880 R14: 00007ffcd98b88b0 R15: 00007ffcd98b8c10 [ 34.129114] [ 34.129419] [ 34.129639] Allocated by task 213: [ 34.130074] kasan_save_stack+0x22/0x50 [ 34.130589] kasan_set_track+0x25/0x30 [ 34.131090] __kasan_slab_alloc+0x59/0x70 [ 34.131634] kmem_cache_alloc+0x16b/0x370 [ 34.132172] vm_area_dup+0x20/0x160 [ 34.132636] __split_vma+0x170/0x950 [ 34.133110] split_vma+0xc6/0x110 [ 34.133554] mprotect_fixup+0x8d2/0xb30 [ 34.134068] do_mprotect_pkey+0x87e/0xd40 [ 34.134614] __x64_sys_mprotect+0x78/0xc0 [ 34.135145] do_syscall_64+0x3f/0x90 [ 34.135637] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.136286] [ 34.136503] Freed by task 213: [ 34.136907] kasan_save_stack+0x22/0x50 [ 34.137418] kasan_set_track+0x25/0x30 [ 34.137932] kasan_save_free_info+0x2b/0x50 [ 34.138476] __kasan_slab_free+0x10a/0x190 [ 34.139022] kmem_cache_free+0x10d/0x4d0 [ 34.139559] rcu_core+0x8c8/0x2860 [ 34.140011] __do_softirq+0x1b7/0x7d4 [ 34.140502] [ 34.140722] Last potentially related work creation: [ 34.141342] kasan_save_stack+0x22/0x50 [ 34.141850] __kasan_record_aux_stack+0x8e/0xa0 [ 34.142436] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.143094] remove_vma+0x139/0x170 [ 34.143563] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.144132] do_vmi_munmap+0x1f1/0x2b0 [ 34.144632] __vm_munmap+0x138/0x3a0 [ 34.145114] __x64_sys_munmap+0x59/0x80 [ 34.145619] do_syscall_64+0x3f/0x90 [ 34.146100] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.146746] [ 34.146967] The buggy address belongs to the object at ffff88800d95a658 [ 34.146967] which belongs to the cache vm_area_struct of size 168 [ 34.148465] The buggy address is located 88 bytes inside of [ 34.148465] freed 168-byte region [ffff88800d95a658, ffff88800d95a700) [ 34.149882] [ 34.150106] The buggy address belongs to the physical page: [ 34.150777] page:0000000053befd02 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd95a [ 34.151906] memcg:ffff88800e8fdb01 [ 34.152347] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.153064] page_type: 0xffffffff() [ 34.153522] raw: 0100000000000200 ffff88800879fc80 ffffea00003638c0 dead000000000003 [ 34.154456] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8fdb01 [ 34.155398] page dumped because: kasan: bad access detected [ 34.156066] [ 34.156293] Memory state around the buggy address: [ 34.156885] ffff88800d95a580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.157761] ffff88800d95a600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 34.158635] >ffff88800d95a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.159527] ^ [ 34.160135] ffff88800d95a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 34.161014] ffff88800d95a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 34.161881] ================================================================== [ 34.162927] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.362964] BUG: Bad rss-counter state mm:00000000720431eb type:MM_FILEPAGES val:33 [ 36.364292] BUG: Bad rss-counter state mm:00000000720431eb type:MM_ANONPAGES val:22 [ 36.878044] BUG: Bad rss-counter state mm:000000001db857e3 type:MM_FILEPAGES val:33 [ 36.879215] BUG: Bad rss-counter state mm:000000001db857e3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3978' (ECDSA) to the list of known hosts. 2023/06/20 00:38:26 fuzzer started 2023/06/20 00:38:27 dialing manager at localhost:44161 2023/06/20 00:38:27 checking machine... 2023/06/20 00:38:27 checking revisions... [ 37.604294] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:38:27 testing simple program... [ 37.650212] cgroup: Unknown subsys name 'net' [ 37.757826] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:38:16 Registers: info registers vcpu 0 RAX=ffffffff86137dd7 RBX=0000000000000001 RCX=ffffffff86137dd2 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888008d7f9d0 RSP=ffff888008d7f908 R8 =ffffffff86137dd6 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000020f00 R12=ffff888008d7f9d8 R13=ffff888008d7f9c0 R14=ffff888008d7fce8 R15=ffff888008d7f978 RIP=ffffffff8113113c 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=00007f04b4968300 CR3=000000000c57c000 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=64ea2b3fb797af8f3a438edb159c3045 XMM02=eff9b2d0a8fce9cb00000000001201e8 XMM03=2c67c8bc2e329bc30000000000120310 XMM04=06e57c110a882bd900000000000ae988 XMM05=c52b477057d4acb80000000000134fc8 XMM06=f65da6e291819f440000000000133728 XMM07=fb795ef6d65770560000000000123fb8 XMM08=2c67c8bc2e329bc30000000000120310 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000005680103 RBX=ffff8880167d4b30 RCX=ffff88806c749420 RDX=0000000000000000 RSI=ffffffff846000aa RDI=0000000000000000 RBP=ffff888013a77db0 RSP=ffff888013a77d28 R8 =0000000007a678ec R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff81845c80 R13=ffffea000035d980 R14=ffffffff81ef13be R15=ffff88800c737580 RIP=ffffffff81370a3b RFL=00000282 [--S----] 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 00007f77f682e900 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=00007f77f6de5618 CR3=000000001bd10000 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=563412feff00545000000000000080fe 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