[ 23.991598] BUG: Bad rss-counter state mm:000000009c185383 type:MM_FILEPAGES val:33 [ 23.992643] BUG: Bad rss-counter state mm:000000009c185383 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 24.163918] ================================================================== [ 24.164840] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.165798] Read of size 8 at addr ffff8880103916b0 by task sshd/219 [ 24.166610] [ 24.166953] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.167841] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.168828] Call Trace: [ 24.169154] [ 24.169440] dump_stack_lvl+0x91/0xf0 [ 24.169948] print_report+0xcc/0x620 [ 24.170466] ? __virt_addr_valid+0x102/0x340 [ 24.171048] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.171675] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.172310] kasan_report+0xbe/0xf0 [ 24.172801] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.173433] vma_interval_tree_remove+0xc75/0xec0 [ 24.174049] vma_prepare+0xc54/0x11a0 [ 24.174551] __split_vma+0x5af/0x950 [ 24.175046] ? __pfx___split_vma+0x10/0x10 [ 24.175581] ? find_held_lock+0x2c/0x110 [ 24.176119] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.176684] ? lock_is_held_type+0x9f/0x120 [ 24.177242] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.177877] ? mtree_range_walk+0x632/0x900 [ 24.178448] ? mas_walk+0x5c7/0x7c0 [ 24.178954] do_vmi_munmap+0x1f1/0x2b0 [ 24.179457] mmap_region+0x1f9/0x2660 [ 24.179956] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.180470] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.181203] ? __pfx_lock_acquire+0x10/0x10 [ 24.181740] ? __pfx_mmap_region+0x10/0x10 [ 24.182300] ? security_mmap_addr+0x7d/0xa0 [ 24.182873] ? get_unmapped_area+0x1f5/0x3f0 [ 24.183438] do_mmap+0x854/0xf00 [ 24.183890] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.184397] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.184989] ksys_mmap_pgoff+0x3af/0x500 [ 24.185517] do_syscall_64+0x3f/0x90 [ 24.186034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.186718] RIP: 0033:0x7fbe36381d82 [ 24.187219] 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 [ 24.189427] RSP: 002b:00007ffc28011e18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.190408] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbe36381d82 [ 24.191337] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbe357bb000 [ 24.192239] RBP: 00007fbe357bb000 R08: 0000000000000009 R09: 0000000000001000 [ 24.193138] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ebc8501ec0 [ 24.194038] R13: 00007ffc28011e30 R14: 00007ffc28011e60 R15: 00007ffc280121c0 [ 24.194989] [ 24.195295] [ 24.195518] Allocated by task 212: [ 24.195980] kasan_save_stack+0x22/0x50 [ 24.196504] kasan_set_track+0x25/0x30 [ 24.197033] __kasan_slab_alloc+0x59/0x70 [ 24.197576] kmem_cache_alloc+0x16b/0x370 [ 24.198127] vm_area_dup+0x20/0x160 [ 24.198630] __split_vma+0x170/0x950 [ 24.199144] split_vma+0xc6/0x110 [ 24.199611] mprotect_fixup+0x8d2/0xb30 [ 24.200162] do_mprotect_pkey+0x87e/0xd40 [ 24.200705] __x64_sys_mprotect+0x78/0xc0 [ 24.201262] do_syscall_64+0x3f/0x90 [ 24.201756] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.202455] [ 24.202679] Freed by task 212: [ 24.203112] kasan_save_stack+0x22/0x50 [ 24.203748] kasan_set_track+0x25/0x30 [ 24.204444] kasan_save_free_info+0x2b/0x50 [ 24.205198] __kasan_slab_free+0x10a/0x190 [ 24.205939] kmem_cache_free+0x10d/0x4d0 [ 24.206676] rcu_core+0x8c8/0x2860 [ 24.207313] __do_softirq+0x1b7/0x7d4 [ 24.207975] [ 24.208216] Last potentially related work creation: [ 24.208846] kasan_save_stack+0x22/0x50 [ 24.209371] __kasan_record_aux_stack+0x8e/0xa0 [ 24.209979] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.210669] remove_vma+0x139/0x170 [ 24.211169] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.211752] do_vmi_munmap+0x1f1/0x2b0 [ 24.212271] __vm_munmap+0x138/0x3a0 [ 24.212757] __x64_sys_munmap+0x59/0x80 [ 24.213290] do_syscall_64+0x3f/0x90 [ 24.213783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.214474] [ 24.214698] Second to last potentially related work creation: [ 24.215439] kasan_save_stack+0x22/0x50 [ 24.215980] __kasan_record_aux_stack+0x8e/0xa0 [ 24.216584] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.217278] remove_vma+0x139/0x170 [ 24.217744] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.218360] do_vmi_munmap+0x1f1/0x2b0 [ 24.218904] mmap_region+0x1f9/0x2660 [ 24.219401] do_mmap+0x854/0xf00 [ 24.219873] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.220388] ksys_mmap_pgoff+0x3af/0x500 [ 24.220924] do_syscall_64+0x3f/0x90 [ 24.221411] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.222091] [ 24.222323] The buggy address belongs to the object at ffff888010391658 [ 24.222323] which belongs to the cache vm_area_struct of size 168 [ 24.223886] The buggy address is located 88 bytes inside of [ 24.223886] freed 168-byte region [ffff888010391658, ffff888010391700) [ 24.225372] [ 24.225596] The buggy address belongs to the physical page: [ 24.226301] page:00000000150a5f61 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10391 [ 24.227468] memcg:ffff888014530301 [ 24.227931] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.228656] page_type: 0xffffffff() [ 24.229167] raw: 0100000000000200 ffff88800879fc80 ffffea000037c9c0 dead000000000007 [ 24.230143] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014530301 [ 24.231106] page dumped because: kasan: bad access detected [ 24.231806] [ 24.232024] Memory state around the buggy address: [ 24.232616] ffff888010391580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.233496] ffff888010391600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 24.234391] >ffff888010391680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.235270] ^ [ 24.235884] ffff888010391700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 24.236740] ffff888010391780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 24.237611] ================================================================== [ 24.238616] Disabling lock debugging due to kernel taint [ 26.270635] BUG: Bad rss-counter state mm:000000003fc20ceb type:MM_FILEPAGES val:33 [ 26.271808] BUG: Bad rss-counter state mm:000000003fc20ceb type:MM_ANONPAGES val:22 [ 26.647026] BUG: Bad rss-counter state mm:0000000035f07b91 type:MM_FILEPAGES val:33 [ 26.648673] BUG: Bad rss-counter state mm:0000000035f07b91 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65493' (ECDSA) to the list of known hosts. 2023/06/20 07:54:01 fuzzer started 2023/06/20 07:54:01 dialing manager at localhost:44161 2023/06/20 07:54:01 checking machine... 2023/06/20 07:54:01 checking revisions... [ 27.398543] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:54:01 testing simple program... [ 27.446287] cgroup: Unknown subsys name 'net' [ 27.483217] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:54:00 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff888018c57e88 RSI=ffff888018c57e58 RDI=ffff88806ce09a80 RBP=ffff88806ce09b08 RSP=ffff88806ce09a70 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=000000000008a6be R12=ffff88806ce09b38 R13=0000000000000000 R14=ffff888009d59b40 R15=ffff88801ab282e0 RIP=ffffffff810bd057 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 00007f170f1ad900 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=00007f170f7650b0 CR3=00000000098ba000 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=2030303a34353a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a34353a3730203032 XMM08=3d656e696c646d632022656369767265 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=00007f79705b1d00 CR3=0000000009f80000 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=1cf2ae483aa7d3a1e84e4dc0d9e033c9 XMM02=000000000011d8f0eff9b2d0a8fce9cb XMM03=000000000011d9c02c67c8bc2e329bc3 XMM04=c643bbe1eea5948000000000000ae988 XMM05=dfcdbad4f1609c370000000000134830 XMM06=2984efb1e38f136c0000000000133a08 XMM07=e042d86d42eb936e0000000000123ee8 XMM08=018515443a368d49000000000011d9c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000