[ 24.066635] BUG: Bad rss-counter state mm:000000008954c217 type:MM_FILEPAGES val:33 [ 24.067852] BUG: Bad rss-counter state mm:000000008954c217 type:MM_ANONPAGES val:22 [ 24.106144] ================================================================== [ 24.107180] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.108058] Read of size 8 at addr ffff888009eef6b0 by task sshd/219 [ 24.108904] [ 24.109113] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.109923] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.110849] Call Trace: [ 24.111167] [ 24.111451] dump_stack_lvl+0x91/0xf0 [ 24.111977] print_report+0xcc/0x620 [ 24.112505] ? __virt_addr_valid+0x102/0x340 [ 24.113128] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.113828] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.114512] kasan_report+0xbe/0xf0 [ 24.115040] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.115751] vma_interval_tree_remove+0xc75/0xec0 [ 24.116417] vma_prepare+0xc54/0x11a0 [ 24.116950] __split_vma+0x5af/0x950 [ 24.117483] ? __pfx___split_vma+0x10/0x10 [ 24.118070] ? find_held_lock+0x2c/0x110 [ 24.118652] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.119285] ? lock_is_held_type+0x9f/0x120 [ 24.119879] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.120483] ? mtree_range_walk+0x632/0x900 [ 24.121048] ? mas_walk+0x5c7/0x7c0 [ 24.121527] do_vmi_munmap+0x1f1/0x2b0 [ 24.122013] mmap_region+0x1f9/0x2660 [ 24.122491] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.123004] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.123705] ? __pfx_lock_acquire+0x10/0x10 [ 24.124240] ? __pfx_mmap_region+0x10/0x10 [ 24.124772] ? security_mmap_addr+0x7d/0xa0 [ 24.125304] ? get_unmapped_area+0x1f5/0x3f0 [ 24.125859] do_mmap+0x854/0xf00 [ 24.126301] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.126789] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.127353] ksys_mmap_pgoff+0x3af/0x500 [ 24.127871] do_syscall_64+0x3f/0x90 [ 24.128358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.129001] RIP: 0033:0x7f5a63f4fd82 [ 24.129457] 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 [ 24.131600] RSP: 002b:00007ffcdcf78708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.132492] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5a63f4fd82 [ 24.133356] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5a63389000 [ 24.134214] RBP: 00007f5a63389000 R08: 0000000000000009 R09: 0000000000001000 [ 24.135077] R10: 0000000000000812 R11: 0000000000000206 R12: 000056426b4c9ec0 [ 24.135934] R13: 00007ffcdcf78720 R14: 00007ffcdcf78750 R15: 00007ffcdcf78ab0 [ 24.136808] [ 24.137117] [ 24.137330] Allocated by task 212: [ 24.137762] kasan_save_stack+0x22/0x50 [ 24.138265] kasan_set_track+0x25/0x30 [ 24.138756] __kasan_slab_alloc+0x59/0x70 [ 24.139287] kmem_cache_alloc+0x16b/0x370 [ 24.139805] vm_area_dup+0x20/0x160 [ 24.140250] __split_vma+0x170/0x950 [ 24.140737] split_vma+0xc6/0x110 [ 24.141175] mprotect_fixup+0x8d2/0xb30 [ 24.141668] do_mprotect_pkey+0x87e/0xd40 [ 24.142196] __x64_sys_mprotect+0x78/0xc0 [ 24.142725] do_syscall_64+0x3f/0x90 [ 24.143203] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.143831] [ 24.144043] Freed by task 210: [ 24.144442] kasan_save_stack+0x22/0x50 [ 24.144976] kasan_set_track+0x25/0x30 [ 24.145476] kasan_save_free_info+0x2b/0x50 [ 24.146014] __kasan_slab_free+0x10a/0x190 [ 24.146550] kmem_cache_free+0x10d/0x4d0 [ 24.147054] rcu_core+0x8c8/0x2860 [ 24.147495] __do_softirq+0x1b7/0x7d4 [ 24.147980] [ 24.148196] Last potentially related work creation: [ 24.148804] kasan_save_stack+0x22/0x50 [ 24.149315] __kasan_record_aux_stack+0x8e/0xa0 [ 24.149887] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.150530] remove_vma+0x139/0x170 [ 24.150983] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.151541] do_vmi_munmap+0x1f1/0x2b0 [ 24.152032] __vm_munmap+0x138/0x3a0 [ 24.152507] __x64_sys_munmap+0x59/0x80 [ 24.153002] do_syscall_64+0x3f/0x90 [ 24.153475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.154124] [ 24.154343] The buggy address belongs to the object at ffff888009eef658 [ 24.154343] which belongs to the cache vm_area_struct of size 168 [ 24.155833] The buggy address is located 88 bytes inside of [ 24.155833] freed 168-byte region [ffff888009eef658, ffff888009eef700) [ 24.157266] [ 24.157482] The buggy address belongs to the physical page: [ 24.158216] page:00000000a31e90a8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9eef [ 24.159311] memcg:ffff88800d129701 [ 24.159744] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.160450] page_type: 0xffffffff() [ 24.160927] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 24.161856] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d129701 [ 24.162770] page dumped because: kasan: bad access detected [ 24.163440] [ 24.163654] Memory state around the buggy address: [ 24.164244] ffff888009eef580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.165120] ffff888009eef600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 24.165992] >ffff888009eef680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.166845] ^ [ 24.167435] ffff888009eef700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 24.168304] ffff888009eef780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 24.169184] ================================================================== [ 24.170459] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.924438] BUG: Bad rss-counter state mm:000000007a0e7dde type:MM_FILEPAGES val:33 [ 25.925216] BUG: Bad rss-counter state mm:000000007a0e7dde type:MM_ANONPAGES val:22 [ 26.355608] BUG: Bad rss-counter state mm:0000000067261f1f type:MM_FILEPAGES val:33 [ 26.356967] BUG: Bad rss-counter state mm:0000000067261f1f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52466' (ECDSA) to the list of known hosts. 2023/06/20 14:59:36 fuzzer started 2023/06/20 14:59:37 dialing manager at localhost:36067 2023/06/20 14:59:37 checking machine... 2023/06/20 14:59:37 checking revisions... [ 27.001455] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:59:37 testing simple program... [ 27.042594] cgroup: Unknown subsys name 'net' [ 27.080115] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:59:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888009a77778 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff888019fb7500 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000088600000886 R12=0000000000000000 R13=00000000000000ef R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff83ab1908 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 00007fd1e5ae9900 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=00007fd1e60a0618 CR3=000000001680c000 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=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 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=00007fd4ac8cfcf0 CR3=000000000d370000 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=cd431d5a865d5aa27b4465dff1e0572b XMM02=2c67c8bc2e329bc3000000000011fb40 XMM03=fb795ef6d65770560000000000122148 XMM04=8b8197d6c423cb7600000000000ae988 XMM05=dfcdbad4f1609c370000000000131cb8 XMM06=47e75014318f662c0000000000130e90 XMM07=e042d86d42eb936e0000000000122420 XMM08=bcf84ae0a7828297000000000011fba0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000