syzkaller login: [ 30.689314] BUG: Bad rss-counter state mm:00000000ac04e8b7 type:MM_FILEPAGES val:33 [ 30.690551] BUG: Bad rss-counter state mm:00000000ac04e8b7 type:MM_ANONPAGES val:22 [ 30.729251] ================================================================== [ 30.730273] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.731242] Read of size 8 at addr ffff88800def73f8 by task sshd/220 [ 30.732032] [ 30.732262] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.733147] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.734156] Call Trace: [ 30.734492] [ 30.734782] dump_stack_lvl+0x91/0xf0 [ 30.735299] print_report+0xcc/0x620 [ 30.735797] ? __virt_addr_valid+0x102/0x340 [ 30.736365] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.736989] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.737619] kasan_report+0xbe/0xf0 [ 30.738110] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.738748] vma_interval_tree_remove+0xc75/0xec0 [ 30.739389] vma_prepare+0xc54/0x11a0 [ 30.739879] __split_vma+0x5af/0x950 [ 30.740359] ? __pfx___split_vma+0x10/0x10 [ 30.740907] ? find_held_lock+0x2c/0x110 [ 30.741444] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.742023] ? lock_is_held_type+0x9f/0x120 [ 30.742582] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.743216] ? mtree_range_walk+0x632/0x900 [ 30.743784] ? mas_walk+0x5c7/0x7c0 [ 30.744268] do_vmi_munmap+0x1f1/0x2b0 [ 30.744771] mmap_region+0x1f9/0x2660 [ 30.745266] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.745787] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.746522] ? __pfx_lock_acquire+0x10/0x10 [ 30.747046] ? __pfx_mmap_region+0x10/0x10 [ 30.747582] ? security_mmap_addr+0x7d/0xa0 [ 30.748106] ? get_unmapped_area+0x1f5/0x3f0 [ 30.748657] do_mmap+0x854/0xf00 [ 30.749090] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.749584] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.750151] ksys_mmap_pgoff+0x3af/0x500 [ 30.750654] do_syscall_64+0x3f/0x90 [ 30.751151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.751798] RIP: 0033:0x7f826aa78d82 [ 30.752257] 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 [ 30.754386] RSP: 002b:00007ffec17cc508 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.755311] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f826aa78d82 [ 30.756147] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8269eb2000 [ 30.756985] RBP: 00007f8269eb2000 R08: 0000000000000009 R09: 0000000000001000 [ 30.757818] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558a364dfd90 [ 30.758649] R13: 00007ffec17cc520 R14: 00007ffec17cc550 R15: 00007ffec17cc8b0 [ 30.759512] [ 30.759800] [ 30.760014] Allocated by task 213: [ 30.760444] kasan_save_stack+0x22/0x50 [ 30.760971] kasan_set_track+0x25/0x30 [ 30.761481] __kasan_slab_alloc+0x59/0x70 [ 30.762011] kmem_cache_alloc+0x16b/0x370 [ 30.762516] vm_area_dup+0x20/0x160 [ 30.762967] __split_vma+0x170/0x950 [ 30.763441] split_vma+0xc6/0x110 [ 30.763874] mprotect_fixup+0x8d2/0xb30 [ 30.764377] do_mprotect_pkey+0x87e/0xd40 [ 30.764887] __x64_sys_mprotect+0x78/0xc0 [ 30.765415] do_syscall_64+0x3f/0x90 [ 30.765892] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.766535] [ 30.766754] Freed by task 213: [ 30.767148] kasan_save_stack+0x22/0x50 [ 30.767652] kasan_set_track+0x25/0x30 [ 30.768141] kasan_save_free_info+0x2b/0x50 [ 30.768677] __kasan_slab_free+0x10a/0x190 [ 30.769198] kmem_cache_free+0x10d/0x4d0 [ 30.769704] rcu_core+0x8c8/0x2860 [ 30.770141] __do_softirq+0x1b7/0x7d4 [ 30.770616] [ 30.770828] Last potentially related work creation: [ 30.771419] kasan_save_stack+0x22/0x50 [ 30.771917] __kasan_record_aux_stack+0x8e/0xa0 [ 30.772487] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.773128] remove_vma+0x139/0x170 [ 30.773573] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.774133] do_vmi_munmap+0x1f1/0x2b0 [ 30.774612] __vm_munmap+0x138/0x3a0 [ 30.775074] __x64_sys_munmap+0x59/0x80 [ 30.775576] do_syscall_64+0x3f/0x90 [ 30.776051] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.776687] [ 30.776897] Second to last potentially related work creation: [ 30.777566] kasan_save_stack+0x22/0x50 [ 30.778061] __kasan_record_aux_stack+0x8e/0xa0 [ 30.778625] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.779266] remove_vma+0x139/0x170 [ 30.779717] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.780268] do_vmi_munmap+0x1f1/0x2b0 [ 30.780748] mmap_region+0x1f9/0x2660 [ 30.781214] do_mmap+0x854/0xf00 [ 30.781640] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.782132] ksys_mmap_pgoff+0x3af/0x500 [ 30.782632] do_syscall_64+0x3f/0x90 [ 30.783117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.783765] [ 30.783982] The buggy address belongs to the object at ffff88800def73a0 [ 30.783982] which belongs to the cache vm_area_struct of size 168 [ 30.785452] The buggy address is located 88 bytes inside of [ 30.785452] freed 168-byte region [ffff88800def73a0, ffff88800def7448) [ 30.786863] [ 30.787078] The buggy address belongs to the physical page: [ 30.787751] page:00000000e355f7fb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdef7 [ 30.788836] memcg:ffff88800de5ce01 [ 30.789266] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.789914] page_type: 0xffffffff() [ 30.790363] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b6ac0 dead000000000004 [ 30.791282] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de5ce01 [ 30.792191] page dumped because: kasan: bad access detected [ 30.792855] [ 30.793067] Memory state around the buggy address: [ 30.793647] ffff88800def7280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.794496] ffff88800def7300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.795356] >ffff88800def7380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.796201] ^ [ 30.797028] ffff88800def7400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.797870] ffff88800def7480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.798711] ================================================================== [ 30.799767] Disabling lock debugging due to kernel taint [ 32.642502] BUG: Bad rss-counter state mm:00000000c8a68bf8 type:MM_FILEPAGES val:33 [ 32.643353] BUG: Bad rss-counter state mm:00000000c8a68bf8 type:MM_ANONPAGES val:22 [ 33.184436] BUG: Bad rss-counter state mm:00000000fabb138b type:MM_FILEPAGES val:33 [ 33.185696] BUG: Bad rss-counter state mm:00000000fabb138b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4721' (ECDSA) to the list of known hosts. 2023/06/20 11:18:17 fuzzer started 2023/06/20 11:18:17 dialing manager at localhost:36067 2023/06/20 11:18:17 checking machine... 2023/06/20 11:18:17 checking revisions... [ 33.784991] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:18:17 testing simple program... [ 33.839735] cgroup: Unknown subsys name 'net' [ 33.889599] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:18:16 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b60 RCX=ffffffff86138e01 RDX=1ffff1100d9c136c RSI=ffffffff8180c705 RDI=ffff88806ce09b6c RBP=0000000000000001 RSP=ffff88806ce09a78 R8 =ffffffff86138e90 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888016dc3680 R15=ffff88800d4d1410 RIP=ffffffff813ad51f RFL=00000246 [---Z-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 00007f8024b2e900 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=00007f80250e60b0 CR3=000000001a364000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c09ebd RBX=ffffffff8604f5ec RCX=ffffffff8451105d RDX=0000000000000000 RSI=ffffffff864b2f26 RDI=ffffffff8604f5d8 RBP=ffffffff8604f5e8 RSP=ffff88806cf099e0 R8 =ffffffff864b2f26 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5305 R12=ffffffff8604f5f4 R13=ffffffff8604f5d8 R14=ffffffff8604f5e4 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007f3803d8b900 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=00007f3803204b80 CR3=0000000009a9c000 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=d71866c2f96a7da9d14907269df79762 XMM02=ec2efd57dc4c00df000000000011a2c8 XMM03=171c9c477817bf19000000000011a398 XMM04=57fe0f183894f58e00000000000ae988 XMM05=504ac666ba13336300000000001339d8 XMM06=4fda316b135da52b00000000001327c8 XMM07=fb795ef6d657705600000000001217a0 XMM08=2c67c8bc2e329bc3000000000011a338 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000