syzkaller login: [ 39.380736] BUG: Bad rss-counter state mm:00000000dcceb0ed type:MM_FILEPAGES val:33 [ 39.382233] BUG: Bad rss-counter state mm:00000000dcceb0ed type:MM_ANONPAGES val:22 [ 39.533604] ================================================================== [ 39.534697] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.535856] Read of size 8 at addr ffff88800e73f3f8 by task sshd/220 [ 39.536779] [ 39.537004] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.537875] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.538914] Call Trace: [ 39.539250] [ 39.539557] dump_stack_lvl+0x91/0xf0 [ 39.540062] print_report+0xcc/0x620 [ 39.540556] ? __virt_addr_valid+0x102/0x340 [ 39.541128] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.541768] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.542402] kasan_report+0xbe/0xf0 [ 39.542894] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.543546] vma_interval_tree_remove+0xc75/0xec0 [ 39.544173] vma_prepare+0xc54/0x11a0 [ 39.544670] __split_vma+0x5af/0x950 [ 39.545156] ? __pfx___split_vma+0x10/0x10 [ 39.545701] ? find_held_lock+0x2c/0x110 [ 39.546239] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.546828] ? lock_is_held_type+0x9f/0x120 [ 39.547383] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.548033] ? mtree_range_walk+0x632/0x900 [ 39.548601] ? mas_walk+0x5c7/0x7c0 [ 39.549090] do_vmi_munmap+0x1f1/0x2b0 [ 39.549596] mmap_region+0x1f9/0x2660 [ 39.550092] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.550616] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.551352] ? __pfx_lock_acquire+0x10/0x10 [ 39.551916] ? __pfx_mmap_region+0x10/0x10 [ 39.552463] ? security_mmap_addr+0x7d/0xa0 [ 39.553008] ? get_unmapped_area+0x1f5/0x3f0 [ 39.553581] do_mmap+0x854/0xf00 [ 39.554034] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.554545] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.555127] ksys_mmap_pgoff+0x3af/0x500 [ 39.555674] do_syscall_64+0x3f/0x90 [ 39.556164] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.556834] RIP: 0033:0x7fef38850d82 [ 39.557310] 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 [ 39.559497] RSP: 002b:00007fffac540778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.560434] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fef38850d82 [ 39.561305] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fef37c8a000 [ 39.562174] RBP: 00007fef37c8a000 R08: 0000000000000009 R09: 0000000000001000 [ 39.563045] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cb667c1f70 [ 39.563935] R13: 00007fffac540790 R14: 00007fffac5407c0 R15: 00007fffac540b20 [ 39.564813] [ 39.565103] [ 39.565320] Allocated by task 213: [ 39.565748] kasan_save_stack+0x22/0x50 [ 39.566251] kasan_set_track+0x25/0x30 [ 39.566745] __kasan_slab_alloc+0x59/0x70 [ 39.567264] kmem_cache_alloc+0x16b/0x370 [ 39.567784] vm_area_dup+0x20/0x160 [ 39.568236] __split_vma+0x170/0x950 [ 39.568700] split_vma+0xc6/0x110 [ 39.569140] mprotect_fixup+0x8d2/0xb30 [ 39.569641] do_mprotect_pkey+0x87e/0xd40 [ 39.570165] __x64_sys_mprotect+0x78/0xc0 [ 39.570682] do_syscall_64+0x3f/0x90 [ 39.571149] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.571792] [ 39.572005] Freed by task 213: [ 39.572397] kasan_save_stack+0x22/0x50 [ 39.572902] kasan_set_track+0x25/0x30 [ 39.573393] kasan_save_free_info+0x2b/0x50 [ 39.573920] __kasan_slab_free+0x10a/0x190 [ 39.574453] kmem_cache_free+0x10d/0x4d0 [ 39.574963] rcu_core+0x8c8/0x2860 [ 39.575404] __do_softirq+0x1b7/0x7d4 [ 39.575893] [ 39.576106] Last potentially related work creation: [ 39.576687] kasan_save_stack+0x22/0x50 [ 39.577189] __kasan_record_aux_stack+0x8e/0xa0 [ 39.577768] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.578420] remove_vma+0x139/0x170 [ 39.578872] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.579436] do_vmi_munmap+0x1f1/0x2b0 [ 39.579941] __vm_munmap+0x138/0x3a0 [ 39.580414] __x64_sys_munmap+0x59/0x80 [ 39.580910] do_syscall_64+0x3f/0x90 [ 39.581386] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.582027] [ 39.582243] The buggy address belongs to the object at ffff88800e73f3a0 [ 39.582243] which belongs to the cache vm_area_struct of size 168 [ 39.583742] The buggy address is located 88 bytes inside of [ 39.583742] freed 168-byte region [ffff88800e73f3a0, ffff88800e73f448) [ 39.585144] [ 39.585359] The buggy address belongs to the physical page: [ 39.586020] page:0000000076894ad6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe73f [ 39.587094] memcg:ffff88800f221601 [ 39.587516] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.588170] page_type: 0xffffffff() [ 39.588617] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.589539] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f221601 [ 39.590445] page dumped because: kasan: bad access detected [ 39.591122] [ 39.591337] Memory state around the buggy address: [ 39.591928] ffff88800e73f280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 39.592785] ffff88800e73f300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 39.593638] >ffff88800e73f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.594509] ^ [ 39.595359] ffff88800e73f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.596234] ffff88800e73f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.597082] ================================================================== [ 39.598371] Disabling lock debugging due to kernel taint [ 41.579912] BUG: Bad rss-counter state mm:00000000551e64c0 type:MM_FILEPAGES val:33 [ 41.581027] BUG: Bad rss-counter state mm:00000000551e64c0 type:MM_ANONPAGES val:22 [ 42.046588] BUG: Bad rss-counter state mm:00000000ebb061a8 type:MM_FILEPAGES val:33 [ 42.048217] BUG: Bad rss-counter state mm:00000000ebb061a8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24108' (ECDSA) to the list of known hosts. 2023/06/20 06:32:00 fuzzer started 2023/06/20 06:32:00 dialing manager at localhost:44161 2023/06/20 06:32:00 checking machine... 2023/06/20 06:32:00 checking revisions... [ 42.811043] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:32:01 testing simple program... [ 42.873144] cgroup: Unknown subsys name 'net' [ 42.929929] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:31:52 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff87f94640 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffff888014197488 RBP=ffff888014197274 RSP=ffff88800fc27d40 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888014197000 R13=ffffffff87f9478c R14=0000000000000010 R15=0000000000000001 RIP=ffffffff814520b6 RFL=00000286 [--S--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 00007f44c0202900 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=00007f44c07ba0b0 CR3=0000000019b6e000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=ffff888008c58400 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=00007ffe807a8448 CR3=000000000e508000 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=2030303a32333a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a32333a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000