[ 30.556983] BUG: Bad rss-counter state mm:0000000099ccffa1 type:MM_FILEPAGES val:33 [ 30.558716] BUG: Bad rss-counter state mm:0000000099ccffa1 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.721059] ================================================================== [ 30.721977] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.722918] Read of size 8 at addr ffff88800e030310 by task sshd/220 [ 30.723689] [ 30.724096] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.724973] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.725969] Call Trace: [ 30.726301] [ 30.726590] dump_stack_lvl+0x91/0xf0 [ 30.727090] print_report+0xcc/0x620 [ 30.727588] ? __virt_addr_valid+0x102/0x340 [ 30.728167] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.728800] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.729432] kasan_report+0xbe/0xf0 [ 30.729915] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.730549] vma_interval_tree_remove+0xc75/0xec0 [ 30.731155] vma_prepare+0xc54/0x11a0 [ 30.731632] __split_vma+0x5af/0x950 [ 30.732117] ? __pfx___split_vma+0x10/0x10 [ 30.732642] ? find_held_lock+0x2c/0x110 [ 30.733164] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.733729] ? lock_is_held_type+0x9f/0x120 [ 30.734274] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.734880] ? mtree_range_walk+0x632/0x900 [ 30.735430] ? mas_walk+0x5c7/0x7c0 [ 30.735913] do_vmi_munmap+0x1f1/0x2b0 [ 30.736402] mmap_region+0x1f9/0x2660 [ 30.736883] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.737396] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.738108] ? __pfx_lock_acquire+0x10/0x10 [ 30.738633] ? __pfx_mmap_region+0x10/0x10 [ 30.739166] ? security_mmap_addr+0x7d/0xa0 [ 30.739694] ? get_unmapped_area+0x1f5/0x3f0 [ 30.740260] do_mmap+0x854/0xf00 [ 30.740701] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.741194] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.741759] ksys_mmap_pgoff+0x3af/0x500 [ 30.742274] do_syscall_64+0x3f/0x90 [ 30.742761] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.743404] RIP: 0033:0x7fb331248d82 [ 30.743870] 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 [ 30.745975] RSP: 002b:00007ffef30fa008 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.746884] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb331248d82 [ 30.747735] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb330682000 [ 30.748609] RBP: 00007fb330682000 R08: 0000000000000009 R09: 0000000000001000 [ 30.749466] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556ee446e980 [ 30.750316] R13: 00007ffef30fa020 R14: 00007ffef30fa050 R15: 00007ffef30fa3b0 [ 30.751188] [ 30.751488] [ 30.751703] Allocated by task 213: [ 30.752150] kasan_save_stack+0x22/0x50 [ 30.752660] kasan_set_track+0x25/0x30 [ 30.753153] __kasan_slab_alloc+0x59/0x70 [ 30.753698] kmem_cache_alloc+0x16b/0x370 [ 30.754219] vm_area_dup+0x20/0x160 [ 30.754693] __split_vma+0x170/0x950 [ 30.755175] split_vma+0xc6/0x110 [ 30.755622] mprotect_fixup+0x8d2/0xb30 [ 30.756138] do_mprotect_pkey+0x87e/0xd40 [ 30.756664] __x64_sys_mprotect+0x78/0xc0 [ 30.757198] do_syscall_64+0x3f/0x90 [ 30.757695] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.758348] [ 30.758564] Freed by task 13: [ 30.758953] kasan_save_stack+0x22/0x50 [ 30.759461] kasan_set_track+0x25/0x30 [ 30.759976] kasan_save_free_info+0x2b/0x50 [ 30.760524] __kasan_slab_free+0x10a/0x190 [ 30.761073] kmem_cache_free+0x10d/0x4d0 [ 30.761577] rcu_core+0x8c8/0x2860 [ 30.762030] __do_softirq+0x1b7/0x7d4 [ 30.762514] [ 30.762735] Last potentially related work creation: [ 30.763324] kasan_save_stack+0x22/0x50 [ 30.763837] __kasan_record_aux_stack+0x8e/0xa0 [ 30.764417] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.765082] remove_vma+0x139/0x170 [ 30.765613] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.766180] do_vmi_munmap+0x1f1/0x2b0 [ 30.766665] __vm_munmap+0x138/0x3a0 [ 30.767143] __x64_sys_munmap+0x59/0x80 [ 30.767652] do_syscall_64+0x3f/0x90 [ 30.768162] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.768828] [ 30.769044] The buggy address belongs to the object at ffff88800e0302b8 [ 30.769044] which belongs to the cache vm_area_struct of size 168 [ 30.770536] The buggy address is located 88 bytes inside of [ 30.770536] freed 168-byte region [ffff88800e0302b8, ffff88800e030360) [ 30.771998] [ 30.772222] The buggy address belongs to the physical page: [ 30.772899] page:000000002dd5b82a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe030 [ 30.773997] memcg:ffff88800ec66f01 [ 30.774428] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.775130] page_type: 0xffffffff() [ 30.775590] raw: 0100000000000200 ffff8880087a0c80 ffffea0000315f00 dead000000000005 [ 30.776556] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec66f01 [ 30.777471] page dumped because: kasan: bad access detected [ 30.778142] [ 30.778355] Memory state around the buggy address: [ 30.778942] ffff88800e030200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.779813] ffff88800e030280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.780697] >ffff88800e030300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.781571] ^ [ 30.782042] ffff88800e030380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.782907] ffff88800e030400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.783780] ================================================================== [ 30.784725] Disabling lock debugging due to kernel taint [ 32.786167] BUG: Bad rss-counter state mm:000000009ece25e6 type:MM_FILEPAGES val:33 [ 32.786956] BUG: Bad rss-counter state mm:000000009ece25e6 type:MM_ANONPAGES val:22 [ 33.198697] BUG: Bad rss-counter state mm:00000000ae4e6cce type:MM_FILEPAGES val:33 [ 33.199809] BUG: Bad rss-counter state mm:00000000ae4e6cce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40734' (ECDSA) to the list of known hosts. 2023/06/21 05:48:30 fuzzer started 2023/06/21 05:48:31 dialing manager at localhost:36067 2023/06/21 05:48:31 checking machine... 2023/06/21 05:48:31 checking revisions... [ 33.946782] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:48:31 testing simple program... [ 33.973116] cgroup: Unknown subsys name 'net' [ 34.035406] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:48:30 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff814c84ae RDX=dffffc0000000000 RSI=ffffffff814c84af RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff860f284c R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000151d9 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8113071f 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 00007f145b95c900 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=00007ffe8ad4a000 CR3=00000000097d6000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fffd0ca0648 CR3=0000000009464000 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=2030333a38343a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a38343a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000