[ 61.140717] BUG: Bad rss-counter state mm:000000006b6192bb type:MM_FILEPAGES val:33 [ 61.141943] BUG: Bad rss-counter state mm:000000006b6192bb type:MM_ANONPAGES val:22 [ 61.182634] ================================================================== [ 61.183585] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.184530] Read of size 8 at addr ffff88800d61d880 by task sshd/226 [ 61.185382] [ 61.185600] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 61.186525] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.187566] Call Trace: [ 61.187905] [ 61.188222] dump_stack_lvl+0x91/0xf0 [ 61.188744] print_report+0xcc/0x620 [ 61.189252] ? __virt_addr_valid+0x102/0x340 [ 61.189816] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.190428] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.191047] kasan_report+0xbe/0xf0 [ 61.191517] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.192139] vma_interval_tree_remove+0xc75/0xec0 [ 61.192761] vma_prepare+0xc54/0x11a0 [ 61.193233] __split_vma+0x5af/0x950 [ 61.193703] ? __pfx___split_vma+0x10/0x10 [ 61.194226] ? find_held_lock+0x2c/0x110 [ 61.194741] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.195322] ? lock_is_held_type+0x9f/0x120 [ 61.195875] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.196523] ? mtree_range_walk+0x632/0x900 [ 61.197092] ? mas_walk+0x5c7/0x7c0 [ 61.197579] do_vmi_munmap+0x1f1/0x2b0 [ 61.198087] mmap_region+0x1f9/0x2660 [ 61.198584] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.199108] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.199847] ? __pfx_lock_acquire+0x10/0x10 [ 61.200427] ? __pfx_mmap_region+0x10/0x10 [ 61.200976] ? security_mmap_addr+0x7d/0xa0 [ 61.201527] ? get_unmapped_area+0x1f5/0x3f0 [ 61.202092] do_mmap+0x854/0xf00 [ 61.202547] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.203056] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.203641] ksys_mmap_pgoff+0x3af/0x500 [ 61.204174] do_syscall_64+0x3f/0x90 [ 61.204680] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.205346] RIP: 0033:0x7ff77b28fd82 [ 61.205821] 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 [ 61.208033] RSP: 002b:00007ffdc0e35cc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.208984] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff77b28fd82 [ 61.209862] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff77a6c9000 [ 61.210739] RBP: 00007ff77a6c9000 R08: 0000000000000009 R09: 0000000000001000 [ 61.211623] R10: 0000000000000812 R11: 0000000000000206 R12: 00005559e3583f60 [ 61.212523] R13: 00007ffdc0e35ce0 R14: 00007ffdc0e35d10 R15: 00007ffdc0e36070 [ 61.213412] [ 61.213715] [ 61.213937] Allocated by task 218: [ 61.214377] kasan_save_stack+0x22/0x50 [ 61.214894] kasan_set_track+0x25/0x30 [ 61.215407] __kasan_slab_alloc+0x59/0x70 [ 61.215948] kmem_cache_alloc+0x16b/0x370 [ 61.216502] vm_area_dup+0x20/0x160 [ 61.216963] __split_vma+0x170/0x950 [ 61.217452] split_vma+0xc6/0x110 [ 61.217906] mprotect_fixup+0x8d2/0xb30 [ 61.218423] do_mprotect_pkey+0x87e/0xd40 [ 61.218956] __x64_sys_mprotect+0x78/0xc0 [ 61.219500] do_syscall_64+0x3f/0x90 [ 61.219982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.220653] [ 61.220876] Freed by task 218: [ 61.221282] kasan_save_stack+0x22/0x50 [ 61.221807] kasan_set_track+0x25/0x30 [ 61.222319] kasan_save_free_info+0x2b/0x50 [ 61.222874] __kasan_slab_free+0x10a/0x190 [ 61.223429] kmem_cache_free+0x10d/0x4d0 [ 61.223956] rcu_core+0x8c8/0x2860 [ 61.224424] __do_softirq+0x1b7/0x7d4 [ 61.224904] [ 61.225123] Last potentially related work creation: [ 61.225734] kasan_save_stack+0x22/0x50 [ 61.226260] __kasan_record_aux_stack+0x8e/0xa0 [ 61.226851] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.227515] remove_vma+0x139/0x170 [ 61.227976] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.228570] do_vmi_munmap+0x1f1/0x2b0 [ 61.229077] __vm_munmap+0x138/0x3a0 [ 61.229561] __x64_sys_munmap+0x59/0x80 [ 61.230070] do_syscall_64+0x3f/0x90 [ 61.230555] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.231219] [ 61.231441] The buggy address belongs to the object at ffff88800d61d828 [ 61.231441] which belongs to the cache vm_area_struct of size 168 [ 61.232971] The buggy address is located 88 bytes inside of [ 61.232971] freed 168-byte region [ffff88800d61d828, ffff88800d61d8d0) [ 61.234433] [ 61.234655] The buggy address belongs to the physical page: [ 61.235338] page:0000000074feb412 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd61d [ 61.236475] memcg:ffff88800fe82a01 [ 61.236911] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.237580] page_type: 0xffffffff() [ 61.238042] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 61.238998] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe82a01 [ 61.239935] page dumped because: kasan: bad access detected [ 61.240626] [ 61.240848] Memory state around the buggy address: [ 61.241456] ffff88800d61d780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 61.242341] ffff88800d61d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 61.243227] >ffff88800d61d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 61.244112] ^ [ 61.244547] ffff88800d61d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.245430] ffff88800d61d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 61.246311] ================================================================== [ 61.247407] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 63.058997] BUG: Bad rss-counter state mm:0000000069e1e6b5 type:MM_FILEPAGES val:33 [ 63.059813] BUG: Bad rss-counter state mm:0000000069e1e6b5 type:MM_ANONPAGES val:22 [ 63.637886] BUG: Bad rss-counter state mm:0000000088c1bd35 type:MM_FILEPAGES val:33 [ 63.639037] BUG: Bad rss-counter state mm:0000000088c1bd35 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46977' (ECDSA) to the list of known hosts. 2023/06/20 07:34:05 fuzzer started 2023/06/20 07:34:05 dialing manager at localhost:44161 2023/06/20 07:34:05 checking machine... 2023/06/20 07:34:05 checking revisions... [ 64.234154] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:34:05 testing simple program... [ 64.290023] cgroup: Unknown subsys name 'net' [ 64.322022] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:34:00 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888019331d98 RCX=0000000000001000 RDX=ffff88800f8f1b40 RSI=ffffffff81978c40 RDI=ffff888019331da0 RBP=0000000000001000 RSP=ffff888019b578c0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=ffffea00005dd4c0 R13=0000000000001000 R14=0000000000000a01 R15=dffffc0000000000 RIP=ffffffff814c07eb RFL=00000206 [-----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 00007f978e351700 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=00007f6623f51008 CR3=000000000cbe6000 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=2034303a34333a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a34333a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86137dd7 RBX=0000000000000002 RCX=ffffffff86137dd2 RDX=0000000000000000 RSI=1ffffffff0c26fba RDI=ffffffff85dfcfd4 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86137dcc R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020f00 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130a5b RFL=00000213 [----A-C] 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 00007f1afc073900 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=00007ffcb2409000 CR3=000000000d5de000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000