[ 32.102088] BUG: Bad rss-counter state mm:00000000d3009961 type:MM_FILEPAGES val:33 [ 32.103017] BUG: Bad rss-counter state mm:00000000d3009961 type:MM_ANONPAGES val:22 [ 32.226464] ================================================================== [ 32.227148] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.227798] Read of size 8 at addr ffff88800e1764e0 by task sshd/220 [ 32.228313] [ 32.228465] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.229053] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.229714] Call Trace: [ 32.229944] [ 32.230146] dump_stack_lvl+0x91/0xf0 [ 32.230483] print_report+0xcc/0x620 [ 32.230978] ? __virt_addr_valid+0x102/0x340 [ 32.231367] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.231798] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.232224] kasan_report+0xbe/0xf0 [ 32.232550] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.232970] vma_interval_tree_remove+0xc75/0xec0 [ 32.233409] vma_prepare+0xc54/0x11a0 [ 32.233742] __split_vma+0x5af/0x950 [ 32.234079] ? __pfx___split_vma+0x10/0x10 [ 32.234440] ? find_held_lock+0x2c/0x110 [ 32.234829] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.235219] ? lock_is_held_type+0x9f/0x120 [ 32.235589] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.236004] ? mtree_range_walk+0x632/0x900 [ 32.236377] ? mas_walk+0x5c7/0x7c0 [ 32.236706] do_vmi_munmap+0x1f1/0x2b0 [ 32.237046] mmap_region+0x1f9/0x2660 [ 32.237383] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.237736] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.238210] ? __pfx_lock_acquire+0x10/0x10 [ 32.238617] ? __pfx_mmap_region+0x10/0x10 [ 32.238976] ? security_mmap_addr+0x7d/0xa0 [ 32.239328] ? get_unmapped_area+0x1f5/0x3f0 [ 32.239705] do_mmap+0x854/0xf00 [ 32.240008] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.240353] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.240735] ksys_mmap_pgoff+0x3af/0x500 [ 32.241087] do_syscall_64+0x3f/0x90 [ 32.241413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.241858] RIP: 0033:0x7feca16a0d82 [ 32.242171] 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 [ 32.243657] RSP: 002b:00007fff055a46a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.244288] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feca16a0d82 [ 32.244868] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feca0ada000 [ 32.245451] RBP: 00007feca0ada000 R08: 0000000000000009 R09: 0000000000001000 [ 32.246023] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558590b4bec0 [ 32.246617] R13: 00007fff055a46c0 R14: 00007fff055a46f0 R15: 00007fff055a4a50 [ 32.247208] [ 32.247412] [ 32.247555] Allocated by task 213: [ 32.247838] kasan_save_stack+0x22/0x50 [ 32.248175] kasan_set_track+0x25/0x30 [ 32.248507] __kasan_slab_alloc+0x59/0x70 [ 32.248859] kmem_cache_alloc+0x16b/0x370 [ 32.249205] vm_area_dup+0x20/0x160 [ 32.249514] __split_vma+0x170/0x950 [ 32.249834] split_vma+0xc6/0x110 [ 32.250130] mprotect_fixup+0x8d2/0xb30 [ 32.250476] do_mprotect_pkey+0x87e/0xd40 [ 32.250862] __x64_sys_mprotect+0x78/0xc0 [ 32.251216] do_syscall_64+0x3f/0x90 [ 32.251547] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.251996] [ 32.252143] Freed by task 13: [ 32.252405] kasan_save_stack+0x22/0x50 [ 32.252750] kasan_set_track+0x25/0x30 [ 32.253096] kasan_save_free_info+0x2b/0x50 [ 32.253468] __kasan_slab_free+0x10a/0x190 [ 32.253828] kmem_cache_free+0x10d/0x4d0 [ 32.254196] rcu_core+0x8c8/0x2860 [ 32.254553] __do_softirq+0x1b7/0x7d4 [ 32.254906] [ 32.255050] Last potentially related work creation: [ 32.255423] kasan_save_stack+0x22/0x50 [ 32.255743] __kasan_record_aux_stack+0x8e/0xa0 [ 32.256137] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.256583] remove_vma+0x139/0x170 [ 32.256901] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.257288] do_vmi_munmap+0x1f1/0x2b0 [ 32.257603] __vm_munmap+0x138/0x3a0 [ 32.257903] __x64_sys_munmap+0x59/0x80 [ 32.258229] do_syscall_64+0x3f/0x90 [ 32.258573] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.258993] [ 32.259138] Second to last potentially related work creation: [ 32.259607] kasan_save_stack+0x22/0x50 [ 32.259950] __kasan_record_aux_stack+0x8e/0xa0 [ 32.260353] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.260785] remove_vma+0x139/0x170 [ 32.261081] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.261448] do_vmi_munmap+0x1f1/0x2b0 [ 32.261755] __vm_munmap+0x138/0x3a0 [ 32.262062] __x64_sys_munmap+0x59/0x80 [ 32.262383] do_syscall_64+0x3f/0x90 [ 32.262730] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.263160] [ 32.263298] The buggy address belongs to the object at ffff88800e176488 [ 32.263298] which belongs to the cache vm_area_struct of size 168 [ 32.264306] The buggy address is located 88 bytes inside of [ 32.264306] freed 168-byte region [ffff88800e176488, ffff88800e176530) [ 32.265265] [ 32.265410] The buggy address belongs to the physical page: [ 32.265893] page:000000004d9777de refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe176 [ 32.266687] memcg:ffff88800d67f101 [ 32.266989] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.267409] page_type: 0xffffffff() [ 32.267706] raw: 0100000000000200 ffff88800879fc80 ffffea00003b28c0 dead000000000002 [ 32.268301] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d67f101 [ 32.268884] page dumped because: kasan: bad access detected [ 32.269315] [ 32.269453] Memory state around the buggy address: [ 32.269826] ffff88800e176380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.270383] ffff88800e176400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.270982] >ffff88800e176480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.271552] ^ [ 32.272080] ffff88800e176500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 32.272639] ffff88800e176580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.273204] ================================================================== [ 32.273889] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.234777] BUG: Bad rss-counter state mm:00000000c465b317 type:MM_FILEPAGES val:33 [ 34.236016] BUG: Bad rss-counter state mm:00000000c465b317 type:MM_ANONPAGES val:22 [ 34.588847] BUG: Bad rss-counter state mm:00000000474ddbd5 type:MM_FILEPAGES val:33 [ 34.589579] BUG: Bad rss-counter state mm:00000000474ddbd5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52528' (ECDSA) to the list of known hosts. 2023/06/20 09:26:30 fuzzer started 2023/06/20 09:26:30 dialing manager at localhost:44161 2023/06/20 09:26:30 checking machine... 2023/06/20 09:26:30 checking revisions... [ 35.200871] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:26:30 testing simple program... [ 35.240209] cgroup: Unknown subsys name 'net' [ 35.290424] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:26:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff813ad420 RCX=ffffffff86137501 RDX=1ffff11002cd5eb0 RSI=ffffffff8180ee7e RDI=ffff8880166af580 RBP=ffff8880166af618 RSP=ffff8880166af510 R8 =ffffffff8613751e R9 =ffff8880166af5c0 R10=0000000000038001 R11=0000000000020d8a R12=ffff8880166af648 R13=0000000000000000 R14=ffff888017e19b40 R15=ffff8880166af580 RIP=ffffffff811305fa 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 00007ff3693c7900 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=00007ff36997e618 CR3=000000000f226000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fe41f9fe740 CR3=000000000f706000 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=46db54bd1b18dfaf214643c094fc4254 XMM02=2c67c8bc2e329bc3000000000011e3c8 XMM03=fb795ef6d657705600000000001245f0 XMM04=a748b121f864f66600000000000ae988 XMM05=19e9129bd510f2350000000000134e98 XMM06=d67799cc236f9d050000000000134070 XMM07=e042d86d42eb936e00000000001248c8 XMM08=559561c2c0866f16000000000011e428 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000