[ 40.975650] BUG: Bad rss-counter state mm:00000000c561cf9f type:MM_FILEPAGES val:33 [ 40.976697] BUG: Bad rss-counter state mm:00000000c561cf9f type:MM_ANONPAGES val:22 [ 41.145247] ================================================================== [ 41.146318] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.147419] Read of size 8 at addr ffff88801688db38 by task sshd/219 [ 41.148511] [ 41.148800] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.149771] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.150763] Call Trace: [ 41.151095] [ 41.151382] dump_stack_lvl+0x91/0xf0 [ 41.151874] print_report+0xcc/0x620 [ 41.152364] ? __virt_addr_valid+0x102/0x340 [ 41.152927] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.153576] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.154216] kasan_report+0xbe/0xf0 [ 41.154707] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.155354] vma_interval_tree_remove+0xc75/0xec0 [ 41.155975] vma_prepare+0xc54/0x11a0 [ 41.156473] __split_vma+0x5af/0x950 [ 41.156978] ? __pfx___split_vma+0x10/0x10 [ 41.157529] ? find_held_lock+0x2c/0x110 [ 41.158071] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.158655] ? lock_is_held_type+0x9f/0x120 [ 41.159213] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.159839] ? mtree_range_walk+0x632/0x900 [ 41.160412] ? mas_walk+0x5c7/0x7c0 [ 41.160917] do_vmi_munmap+0x1f1/0x2b0 [ 41.161443] mmap_region+0x1f9/0x2660 [ 41.161936] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.162470] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.163214] ? __pfx_lock_acquire+0x10/0x10 [ 41.163768] ? __pfx_mmap_region+0x10/0x10 [ 41.164315] ? security_mmap_addr+0x7d/0xa0 [ 41.164878] ? get_unmapped_area+0x1f5/0x3f0 [ 41.165443] do_mmap+0x854/0xf00 [ 41.165898] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.166414] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.167000] ksys_mmap_pgoff+0x3af/0x500 [ 41.167522] do_syscall_64+0x3f/0x90 [ 41.168013] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.168683] RIP: 0033:0x7fc70b7dbd82 [ 41.169158] 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 [ 41.171391] RSP: 002b:00007ffe49402e08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.172327] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc70b7dbd82 [ 41.173224] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc70ac15000 [ 41.174108] RBP: 00007fc70ac15000 R08: 0000000000000009 R09: 0000000000001000 [ 41.174998] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ef3963ad90 [ 41.175870] R13: 00007ffe49402e20 R14: 00007ffe49402e50 R15: 00007ffe494031b0 [ 41.176768] [ 41.177068] [ 41.177289] Allocated by task 212: [ 41.177733] kasan_save_stack+0x22/0x50 [ 41.178251] kasan_set_track+0x25/0x30 [ 41.178762] __kasan_slab_alloc+0x59/0x70 [ 41.179298] kmem_cache_alloc+0x16b/0x370 [ 41.179831] vm_area_dup+0x20/0x160 [ 41.180301] __split_vma+0x170/0x950 [ 41.180796] split_vma+0xc6/0x110 [ 41.181250] mprotect_fixup+0x8d2/0xb30 [ 41.181766] do_mprotect_pkey+0x87e/0xd40 [ 41.182308] __x64_sys_mprotect+0x78/0xc0 [ 41.182851] do_syscall_64+0x3f/0x90 [ 41.183344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.184006] [ 41.184226] Freed by task 19: [ 41.184626] kasan_save_stack+0x22/0x50 [ 41.185163] kasan_set_track+0x25/0x30 [ 41.185679] kasan_save_free_info+0x2b/0x50 [ 41.186234] __kasan_slab_free+0x10a/0x190 [ 41.186783] kmem_cache_free+0x10d/0x4d0 [ 41.187311] rcu_core+0x8c8/0x2860 [ 41.187777] __do_softirq+0x1b7/0x7d4 [ 41.188269] [ 41.188489] Last potentially related work creation: [ 41.189094] kasan_save_stack+0x22/0x50 [ 41.189670] __kasan_record_aux_stack+0x8e/0xa0 [ 41.190270] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.190935] remove_vma+0x139/0x170 [ 41.191403] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.191977] do_vmi_munmap+0x1f1/0x2b0 [ 41.192480] __vm_munmap+0x138/0x3a0 [ 41.192980] __x64_sys_munmap+0x59/0x80 [ 41.193496] do_syscall_64+0x3f/0x90 [ 41.193990] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.194654] [ 41.194877] The buggy address belongs to the object at ffff88801688dae0 [ 41.194877] which belongs to the cache vm_area_struct of size 168 [ 41.196411] The buggy address is located 88 bytes inside of [ 41.196411] freed 168-byte region [ffff88801688dae0, ffff88801688db88) [ 41.197882] [ 41.198107] The buggy address belongs to the physical page: [ 41.198787] page:00000000dddea260 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1688d [ 41.199915] memcg:ffff88801688b101 [ 41.200359] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.201093] page_type: 0xffffffff() [ 41.201564] raw: 0100000000000200 ffff88800879fc80 ffffea000040d480 dead000000000005 [ 41.202505] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801688b101 [ 41.203429] page dumped because: kasan: bad access detected [ 41.204097] [ 41.204314] Memory state around the buggy address: [ 41.204929] ffff88801688da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.205814] ffff88801688da80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 41.206699] >ffff88801688db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.207577] ^ [ 41.208210] ffff88801688db80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 41.209093] ffff88801688dc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 41.209981] ================================================================== [ 41.211019] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 44.093149] BUG: Bad rss-counter state mm:0000000046d74673 type:MM_FILEPAGES val:33 [ 44.094335] BUG: Bad rss-counter state mm:0000000046d74673 type:MM_ANONPAGES val:22 [ 44.689195] BUG: Bad rss-counter state mm:00000000a8e891bb type:MM_FILEPAGES val:33 [ 44.690349] BUG: Bad rss-counter state mm:00000000a8e891bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28558' (ECDSA) to the list of known hosts. 2023/06/20 09:24:15 fuzzer started 2023/06/20 09:24:16 dialing manager at localhost:44161 2023/06/20 09:24:16 checking machine... 2023/06/20 09:24:16 checking revisions... [ 45.340265] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:24:16 testing simple program... [ 45.395927] cgroup: Unknown subsys name 'net' [ 45.466294] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:23:58 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11001f28eb8 RSP=ffff88800f9475b0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff856d8238 R13=ffffffff8180ae86 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff812d86a2 RFL=00000047 [---Z-PC] 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 00007f1a78add900 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=00007f1a79094618 CR3=000000000d80e000 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=0000000000000000 RBX=ffff88800e5f7a00 RCX=ffff88800e5f7a00 RDX=0000000080100006 RSI=ffff88800e5f7a00 RDI=ffff888008441b40 RBP=ffff88801479f618 RSP=ffff88801479f580 R8 =0000000080100005 R9 =0000000000000000 R10=ffffea0000397d80 R11=0000000080110000 R12=ffffea0000397d80 R13=ffff88800e5f7600 R14=0000000080100005 R15=ffff888008441b40 RIP=ffffffff818094f2 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 00007f13377cc900 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=00007f1336c3adf0 CR3=0000000013a7a000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=695addcc1f118daa00000000000ae988 XMM05=68eab92153c48e980000000000134c60 XMM06=806171799158d96700000000001336e0 XMM07=fb795ef6d65770560000000000123c48 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000