syzkaller login: [ 34.337513] BUG: Bad rss-counter state mm:00000000d5461362 type:MM_FILEPAGES val:33 [ 34.338765] BUG: Bad rss-counter state mm:00000000d5461362 type:MM_ANONPAGES val:22 [ 34.375700] ================================================================== [ 34.376610] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.377573] Read of size 8 at addr ffff88801660c4e0 by task sshd/220 [ 34.378454] [ 34.378672] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.379548] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.380537] Call Trace: [ 34.380853] [ 34.381171] dump_stack_lvl+0x91/0xf0 [ 34.381659] print_report+0xcc/0x620 [ 34.382135] ? __virt_addr_valid+0x102/0x340 [ 34.382683] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.383292] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.383921] kasan_report+0xbe/0xf0 [ 34.384401] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.385026] vma_interval_tree_remove+0xc75/0xec0 [ 34.385675] vma_prepare+0xc54/0x11a0 [ 34.386149] __split_vma+0x5af/0x950 [ 34.386613] ? __pfx___split_vma+0x10/0x10 [ 34.387136] ? find_held_lock+0x2c/0x110 [ 34.387649] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.388203] ? lock_is_held_type+0x9f/0x120 [ 34.388733] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.389345] ? mtree_range_walk+0x632/0x900 [ 34.389889] ? mas_walk+0x5c7/0x7c0 [ 34.390357] do_vmi_munmap+0x1f1/0x2b0 [ 34.390885] mmap_region+0x1f9/0x2660 [ 34.391397] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.391899] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.392606] ? __pfx_lock_acquire+0x10/0x10 [ 34.393175] ? __pfx_mmap_region+0x10/0x10 [ 34.393726] ? security_mmap_addr+0x7d/0xa0 [ 34.394257] ? get_unmapped_area+0x1f5/0x3f0 [ 34.394808] do_mmap+0x854/0xf00 [ 34.395240] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.395746] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.396327] ksys_mmap_pgoff+0x3af/0x500 [ 34.396832] do_syscall_64+0x3f/0x90 [ 34.397313] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.397975] RIP: 0033:0x7fe798a23d82 [ 34.398436] 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 [ 34.400562] RSP: 002b:00007fffaa48ef98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.401500] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe798a23d82 [ 34.402377] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe797e5d000 [ 34.403251] RBP: 00007fe797e5d000 R08: 0000000000000009 R09: 0000000000001000 [ 34.404121] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555c7d2e1ec0 [ 34.404993] R13: 00007fffaa48efb0 R14: 00007fffaa48efe0 R15: 00007fffaa48f340 [ 34.405890] [ 34.406193] [ 34.406412] Allocated by task 213: [ 34.406853] kasan_save_stack+0x22/0x50 [ 34.407374] kasan_set_track+0x25/0x30 [ 34.407884] __kasan_slab_alloc+0x59/0x70 [ 34.408424] kmem_cache_alloc+0x16b/0x370 [ 34.408950] vm_area_dup+0x20/0x160 [ 34.409429] __split_vma+0x170/0x950 [ 34.409905] split_vma+0xc6/0x110 [ 34.410352] mprotect_fixup+0x8d2/0xb30 [ 34.410873] do_mprotect_pkey+0x87e/0xd40 [ 34.411405] __x64_sys_mprotect+0x78/0xc0 [ 34.411944] do_syscall_64+0x3f/0x90 [ 34.412427] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.413110] [ 34.413339] Freed by task 213: [ 34.413747] kasan_save_stack+0x22/0x50 [ 34.414262] kasan_set_track+0x25/0x30 [ 34.414766] kasan_save_free_info+0x2b/0x50 [ 34.415315] __kasan_slab_free+0x10a/0x190 [ 34.415861] kmem_cache_free+0x10d/0x4d0 [ 34.416380] rcu_core+0x8c8/0x2860 [ 34.416836] __do_softirq+0x1b7/0x7d4 [ 34.417345] [ 34.417565] Last potentially related work creation: [ 34.418169] kasan_save_stack+0x22/0x50 [ 34.418688] __kasan_record_aux_stack+0x8e/0xa0 [ 34.419278] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.419937] remove_vma+0x139/0x170 [ 34.420398] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.420971] do_vmi_munmap+0x1f1/0x2b0 [ 34.421480] __vm_munmap+0x138/0x3a0 [ 34.421962] __x64_sys_munmap+0x59/0x80 [ 34.422476] do_syscall_64+0x3f/0x90 [ 34.422962] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.423624] [ 34.423849] The buggy address belongs to the object at ffff88801660c488 [ 34.423849] which belongs to the cache vm_area_struct of size 168 [ 34.425390] The buggy address is located 88 bytes inside of [ 34.425390] freed 168-byte region [ffff88801660c488, ffff88801660c530) [ 34.426828] [ 34.427051] The buggy address belongs to the physical page: [ 34.427725] page:000000009a3f7101 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1660c [ 34.428853] memcg:ffff88800eaec501 [ 34.429308] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.429970] page_type: 0xffffffff() [ 34.430432] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.431379] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eaec501 [ 34.432309] page dumped because: kasan: bad access detected [ 34.432990] [ 34.433218] Memory state around the buggy address: [ 34.433818] ffff88801660c380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.434704] ffff88801660c400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 34.435585] >ffff88801660c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.436458] ^ [ 34.437258] ffff88801660c500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 34.438135] ffff88801660c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.439008] ================================================================== [ 34.440069] Disabling lock debugging due to kernel taint [ 36.520622] BUG: Bad rss-counter state mm:00000000416292e9 type:MM_FILEPAGES val:33 [ 36.521546] BUG: Bad rss-counter state mm:00000000416292e9 type:MM_ANONPAGES val:22 [ 36.986552] BUG: Bad rss-counter state mm:000000007f094bdf type:MM_FILEPAGES val:33 [ 36.987517] BUG: Bad rss-counter state mm:000000007f094bdf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37920' (ECDSA) to the list of known hosts. 2023/06/19 14:25:05 fuzzer started 2023/06/19 14:25:05 dialing manager at localhost:44161 2023/06/19 14:25:05 checking machine... 2023/06/19 14:25:05 checking revisions... [ 37.733862] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:25:05 testing simple program... [ 37.779356] cgroup: Unknown subsys name 'net' [ 37.821029] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:24:54 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8180f43b RCX=ffffffff86137501 RDX=1ffff1100d9c135e RSI=0000000000000000 RDI=ffffffff8180f43b RBP=ffffffff8180f43b RSP=ffff88806ce09a48 R8 =ffffffff86137542 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8a R12=0000000000000001 R13=0000000000000000 R14=ffff888015e23680 R15=ffff888013ffcc60 RIP=ffffffff811fc772 RFL=00000283 [--S---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 00007f8106b7a700 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=00007f81eeb8a540 CR3=000000000d9d4000 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=2035303a35323a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a35323a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000201 RBX=0000000000000f34 RCX=ffffffff83664f2e RDX=ffff888016289b40 RSI=0000000000000000 RDI=0000000000000004 RBP=ffff88800dcd4a00 RSP=ffff88800ed0f3e8 R8 =0000000000000004 R9 =0000000000000f34 R10=0000000000001ec0 R11=00000a0200000a02 R12=0000000000000014 R13=ffff888018f74f20 R14=0000000000001ec0 R15=0000000000000fa0 RIP=ffffffff814c07eb RFL=00000287 [--S--PC] 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 00007fc8efc8f900 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=00007ffdd100f000 CR3=000000000e274000 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