[ 24.065899] BUG: Bad rss-counter state mm:000000008dc339e3 type:MM_FILEPAGES val:33 [ 24.067372] BUG: Bad rss-counter state mm:000000008dc339e3 type:MM_ANONPAGES val:22 [ 24.234917] ================================================================== [ 24.235999] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.237091] Read of size 8 at addr ffff888009e49228 by task sshd/219 [ 24.238112] [ 24.238369] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.239376] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.240529] Call Trace: [ 24.240906] [ 24.241250] dump_stack_lvl+0x91/0xf0 [ 24.241828] print_report+0xcc/0x620 [ 24.242396] ? __virt_addr_valid+0x102/0x340 [ 24.243043] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.243775] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.244501] kasan_report+0xbe/0xf0 [ 24.245058] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.245802] vma_interval_tree_remove+0xc75/0xec0 [ 24.246503] vma_prepare+0xc54/0x11a0 [ 24.247069] __split_vma+0x5af/0x950 [ 24.247621] ? __pfx___split_vma+0x10/0x10 [ 24.248239] ? find_held_lock+0x2c/0x110 [ 24.248849] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.249537] ? lock_is_held_type+0x9f/0x120 [ 24.250170] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.250884] ? mtree_range_walk+0x632/0x900 [ 24.251532] ? mas_walk+0x5c7/0x7c0 [ 24.252098] do_vmi_munmap+0x1f1/0x2b0 [ 24.252674] mmap_region+0x1f9/0x2660 [ 24.253248] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.253846] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.254679] ? __pfx_lock_acquire+0x10/0x10 [ 24.255300] ? __pfx_mmap_region+0x10/0x10 [ 24.255922] ? security_mmap_addr+0x7d/0xa0 [ 24.256543] ? get_unmapped_area+0x1f5/0x3f0 [ 24.257204] do_mmap+0x854/0xf00 [ 24.257723] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.258294] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.258952] ksys_mmap_pgoff+0x3af/0x500 [ 24.259548] do_syscall_64+0x3f/0x90 [ 24.260104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.260868] RIP: 0033:0x7ff943930d82 [ 24.261422] 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 [ 24.263921] RSP: 002b:00007ffce2b0f208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.264985] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff943930d82 [ 24.266005] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff942d6a000 [ 24.267007] RBP: 00007ff942d6a000 R08: 0000000000000009 R09: 0000000000001000 [ 24.267991] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b876935b20 [ 24.268990] R13: 00007ffce2b0f220 R14: 00007ffce2b0f250 R15: 00007ffce2b0f5b0 [ 24.270013] [ 24.270354] [ 24.270607] Allocated by task 212: [ 24.271118] kasan_save_stack+0x22/0x50 [ 24.271706] kasan_set_track+0x25/0x30 [ 24.272289] __kasan_slab_alloc+0x59/0x70 [ 24.272899] kmem_cache_alloc+0x16b/0x370 [ 24.273525] vm_area_dup+0x20/0x160 [ 24.274056] __split_vma+0x170/0x950 [ 24.274602] split_vma+0xc6/0x110 [ 24.275118] mprotect_fixup+0x8d2/0xb30 [ 24.275705] do_mprotect_pkey+0x87e/0xd40 [ 24.276325] __x64_sys_mprotect+0x78/0xc0 [ 24.276935] do_syscall_64+0x3f/0x90 [ 24.277510] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.278266] [ 24.278517] Freed by task 212: [ 24.278983] kasan_save_stack+0x22/0x50 [ 24.279569] kasan_set_track+0x25/0x30 [ 24.280136] kasan_save_free_info+0x2b/0x50 [ 24.280756] __kasan_slab_free+0x10a/0x190 [ 24.281406] kmem_cache_free+0x10d/0x4d0 [ 24.282005] rcu_core+0x8c8/0x2860 [ 24.282525] __do_softirq+0x1b7/0x7d4 [ 24.283086] [ 24.283326] Last potentially related work creation: [ 24.284004] kasan_save_stack+0x22/0x50 [ 24.284626] __kasan_record_aux_stack+0x8e/0xa0 [ 24.285332] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.286112] remove_vma+0x139/0x170 [ 24.286663] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.287303] do_vmi_munmap+0x1f1/0x2b0 [ 24.287888] __vm_munmap+0x138/0x3a0 [ 24.288466] __x64_sys_munmap+0x59/0x80 [ 24.289075] do_syscall_64+0x3f/0x90 [ 24.289677] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.290467] [ 24.290729] The buggy address belongs to the object at ffff888009e491d0 [ 24.290729] which belongs to the cache vm_area_struct of size 168 [ 24.292529] The buggy address is located 88 bytes inside of [ 24.292529] freed 168-byte region [ffff888009e491d0, ffff888009e49278) [ 24.294269] [ 24.294535] The buggy address belongs to the physical page: [ 24.295319] page:00000000a5ef51ef refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9e49 [ 24.296583] memcg:ffff888009e0a601 [ 24.297067] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.297808] page_type: 0xffffffff() [ 24.298338] raw: 0100000000000200 ffff8880087a0c80 ffffea000035f6c0 dead000000000004 [ 24.299436] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009e0a601 [ 24.300528] page dumped because: kasan: bad access detected [ 24.301327] [ 24.301587] Memory state around the buggy address: [ 24.302296] ffff888009e49100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.303344] ffff888009e49180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 24.304394] >ffff888009e49200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 24.305444] ^ [ 24.306121] ffff888009e49280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 24.307172] ffff888009e49300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 24.308218] ================================================================== [ 24.309749] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.589195] BUG: Bad rss-counter state mm:00000000f3aff5d2 type:MM_FILEPAGES val:33 [ 26.590403] BUG: Bad rss-counter state mm:00000000f3aff5d2 type:MM_ANONPAGES val:22 [ 26.969972] BUG: Bad rss-counter state mm:00000000c7f65399 type:MM_FILEPAGES val:33 [ 26.971167] BUG: Bad rss-counter state mm:00000000c7f65399 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21691' (ECDSA) to the list of known hosts. 2023/06/20 22:11:14 fuzzer started 2023/06/20 22:11:14 dialing manager at localhost:36067 2023/06/20 22:11:14 checking machine... 2023/06/20 22:11:14 checking revisions... [ 27.738879] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:11:14 testing simple program... [ 27.797023] cgroup: Unknown subsys name 'net' [ 27.882352] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:11:13 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000555b9260c360 RCX=00007f5ec9e9b116 RDX=0000000000000014 RSI=0000555b92612890 RDI=0000555b9260c4a8 RBP=0000000000000001 RSP=00007ffef7974428 R8 =0000000000000000 R9 =00007ffef79f2080 R10=00000000ffffffff R11=0000000000000000 R12=0000000000000001 R13=0000000000000014 R14=0000000000000000 R15=0000000000000000 RIP=00007f5eca0dad20 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5ec95d2900 00000000 00000000 GS =0000 0000000000000000 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=00007f5ec8a1a380 CR3=000000000c570000 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=1efc4ca9e32f8096ab465e8b68c7be59 XMM02=ec2efd57dc4c00df000000000011a758 XMM03=af544e2ae935545c000000000011a828 XMM04=e804ed96be55719000000000000ae988 XMM05=93f4ce04bf20f4f50000000000132680 XMM06=806171799158d96700000000001313b0 XMM07=fb795ef6d65770560000000000121650 XMM08=2c67c8bc2e329bc3000000000011a7c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff860a1401 RDX=1ffff1100d9e135e RSI=ffffffff8451105e RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =ffffffff860a1444 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000792d R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888016ed9b40 R15=ffff888009997d90 RIP=ffffffff813ad47e 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 00007f25d2fab900 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=00007f25d3562618 CR3=000000000f752000 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