[ 31.046996] BUG: Bad rss-counter state mm:000000007adc524b type:MM_FILEPAGES val:33 [ 31.048227] BUG: Bad rss-counter state mm:000000007adc524b type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.247028] ================================================================== [ 31.248126] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.249238] Read of size 8 at addr ffff88800f2f6a50 by task sshd/228 [ 31.250236] [ 31.250494] CPU: 0 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.251404] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.252315] Call Trace: [ 31.252622] <TASK> [ 31.252906] dump_stack_lvl+0x91/0xf0 [ 31.253405] print_report+0xcc/0x620 [ 31.253917] ? __virt_addr_valid+0x102/0x340 [ 31.254471] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.255085] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.255713] kasan_report+0xbe/0xf0 [ 31.256179] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.256801] vma_interval_tree_remove+0xc75/0xec0 [ 31.257405] vma_prepare+0xc54/0x11a0 [ 31.257910] __split_vma+0x5af/0x950 [ 31.258395] ? __pfx___split_vma+0x10/0x10 [ 31.258915] ? find_held_lock+0x2c/0x110 [ 31.259436] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.259996] ? lock_is_held_type+0x9f/0x120 [ 31.260534] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.261136] ? mtree_range_walk+0x632/0x900 [ 31.261682] ? mas_walk+0x5c7/0x7c0 [ 31.262162] do_vmi_munmap+0x1f1/0x2b0 [ 31.262656] mmap_region+0x1f9/0x2660 [ 31.263133] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.263644] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.264399] ? __pfx_lock_acquire+0x10/0x10 [ 31.264929] ? __pfx_mmap_region+0x10/0x10 [ 31.265473] ? security_mmap_addr+0x7d/0xa0 [ 31.266005] ? get_unmapped_area+0x1f5/0x3f0 [ 31.266553] do_mmap+0x854/0xf00 [ 31.266986] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.267470] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.268015] ksys_mmap_pgoff+0x3af/0x500 [ 31.268525] do_syscall_64+0x3f/0x90 [ 31.268997] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.269635] RIP: 0033:0x7ff806690d82 [ 31.270109] 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 [ 31.272223] RSP: 002b:00007fff6f48de38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.273124] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff806690d82 [ 31.274000] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff805aca000 [ 31.274859] RBP: 00007ff805aca000 R08: 0000000000000009 R09: 0000000000001000 [ 31.275709] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ef3e6f1ec0 [ 31.276568] R13: 00007fff6f48de50 R14: 00007fff6f48de80 R15: 00007fff6f48e1e0 [ 31.277428] </TASK> [ 31.277721] [ 31.277945] Allocated by task 219: [ 31.278382] kasan_save_stack+0x22/0x50 [ 31.278891] kasan_set_track+0x25/0x30 [ 31.279391] __kasan_slab_alloc+0x59/0x70 [ 31.279915] kmem_cache_alloc+0x16b/0x370 [ 31.280440] vm_area_dup+0x20/0x160 [ 31.280899] __split_vma+0x170/0x950 [ 31.281373] split_vma+0xc6/0x110 [ 31.281816] mprotect_fixup+0x8d2/0xb30 [ 31.282337] do_mprotect_pkey+0x87e/0xd40 [ 31.282858] __x64_sys_mprotect+0x78/0xc0 [ 31.283383] do_syscall_64+0x3f/0x90 [ 31.283864] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.284575] [ 31.284788] Freed by task 219: [ 31.285187] kasan_save_stack+0x22/0x50 [ 31.285694] kasan_set_track+0x25/0x30 [ 31.286197] kasan_save_free_info+0x2b/0x50 [ 31.286738] __kasan_slab_free+0x10a/0x190 [ 31.287248] kmem_cache_free+0x10d/0x4d0 [ 31.287733] rcu_core+0x8c8/0x2860 [ 31.288158] __do_softirq+0x1b7/0x7d4 [ 31.288616] [ 31.288823] Last potentially related work creation: [ 31.289383] kasan_save_stack+0x22/0x50 [ 31.289859] __kasan_record_aux_stack+0x8e/0xa0 [ 31.290430] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.291076] remove_vma+0x139/0x170 [ 31.291518] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.292051] do_vmi_munmap+0x1f1/0x2b0 [ 31.292541] __vm_munmap+0x138/0x3a0 [ 31.293014] __x64_sys_munmap+0x59/0x80 [ 31.293524] do_syscall_64+0x3f/0x90 [ 31.294015] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.294662] [ 31.294881] The buggy address belongs to the object at ffff88800f2f69f8 [ 31.294881] which belongs to the cache vm_area_struct of size 168 [ 31.296347] The buggy address is located 88 bytes inside of [ 31.296347] freed 168-byte region [ffff88800f2f69f8, ffff88800f2f6aa0) [ 31.297736] [ 31.297964] The buggy address belongs to the physical page: [ 31.298616] page:0000000013490ed2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf2f6 [ 31.299703] memcg:ffff88800c95db01 [ 31.300128] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.300769] page_type: 0xffffffff() [ 31.301212] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.302123] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c95db01 [ 31.303031] page dumped because: kasan: bad access detected [ 31.303687] [ 31.303893] Memory state around the buggy address: [ 31.304466] ffff88800f2f6900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.305296] ffff88800f2f6980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.306149] >ffff88800f2f6a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.306978] ^ [ 31.307684] ffff88800f2f6a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.308540] ffff88800f2f6b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.309380] ================================================================== [ 31.310465] Disabling lock debugging due to kernel taint [ 33.144199] BUG: Bad rss-counter state mm:000000004138eb9a type:MM_FILEPAGES val:33 [ 33.145154] BUG: Bad rss-counter state mm:000000004138eb9a type:MM_ANONPAGES val:22 [ 33.597718] BUG: Bad rss-counter state mm:000000008cd995f8 type:MM_FILEPAGES val:33 [ 33.598765] BUG: Bad rss-counter state mm:000000008cd995f8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26300' (ECDSA) to the list of known hosts. 2023/06/20 13:10:02 fuzzer started 2023/06/20 13:10:02 dialing manager at localhost:36067 2023/06/20 13:10:02 checking machine... 2023/06/20 13:10:02 checking revisions... [ 34.374397] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:10:03 testing simple program... [ 34.428665] cgroup: Unknown subsys name 'net' [ 34.489251] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:10:02 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff8880102e75b0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff856d84b8 R15=0000000000000000 RIP=ffffffff8135b960 RFL=00000016 [----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 00007f0b66ee3900 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=00007f0b662f4230 CR3=000000000c59a000 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=a37940966bac20882d4847353e61d81d XMM02=eff9b2d0a8fce9cb000000000011ac30 XMM03=2c67c8bc2e329bc3000000000011ad58 XMM04=d83684c63cbe3f7000000000000ae988 XMM05=b9d746443fbc0db10000000000132c50 XMM06=928acbf9b8e3b07b0000000000131cf8 XMM07=fb795ef6d65770560000000000121f40 XMM08=2c67c8bc2e329bc3000000000011ad58 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001d8105f RBX=ffff88800ec082c8 RCX=1ffff11001e01e60 RDX=dffffc0000000000 RSI=ffff88800e2e7228 RDI=ffff88800ec082f8 RBP=ffff88800ea74408 RSP=ffff88801ccf7538 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800e2e7140 R13=0000000000000000 R14=ffff88800df443d8 R15=ffff88800df44390 RIP=ffffffff8184767e 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 00007f5f98ee6900 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=00007f5f9949d618 CR3=000000000948c000 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=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