syzkaller login: [ 51.570707] sshd (215) used greatest stack depth: 24128 bytes left [ 51.571669] BUG: Bad rss-counter state mm:00000000b53905b1 type:MM_FILEPAGES val:33 [ 51.572863] BUG: Bad rss-counter state mm:00000000b53905b1 type:MM_ANONPAGES val:22 [ 51.742740] ================================================================== [ 51.743803] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 51.744940] Read of size 8 at addr ffff88800e2b7140 by task sshd/222 [ 51.745862] [ 51.746078] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 51.746936] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 51.747920] Call Trace: [ 51.748241] [ 51.748534] dump_stack_lvl+0x91/0xf0 [ 51.749029] print_report+0xcc/0x620 [ 51.749516] ? __virt_addr_valid+0x102/0x340 [ 51.750070] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.750687] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.751308] kasan_report+0xbe/0xf0 [ 51.751791] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.752431] vma_interval_tree_remove+0xc75/0xec0 [ 51.753046] vma_prepare+0xc54/0x11a0 [ 51.753523] __split_vma+0x5af/0x950 [ 51.753995] ? __pfx___split_vma+0x10/0x10 [ 51.754529] ? find_held_lock+0x2c/0x110 [ 51.755054] do_vmi_align_munmap+0x2ba/0x11f0 [ 51.755622] ? lock_is_held_type+0x9f/0x120 [ 51.756156] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 51.756773] ? mtree_range_walk+0x632/0x900 [ 51.757321] ? mas_walk+0x5c7/0x7c0 [ 51.757801] do_vmi_munmap+0x1f1/0x2b0 [ 51.758299] mmap_region+0x1f9/0x2660 [ 51.758785] ? vm_mmap_pgoff+0x15c/0x3a0 [ 51.759297] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 51.760016] ? __pfx_lock_acquire+0x10/0x10 [ 51.760557] ? __pfx_mmap_region+0x10/0x10 [ 51.761092] ? security_mmap_addr+0x7d/0xa0 [ 51.761630] ? get_unmapped_area+0x1f5/0x3f0 [ 51.762179] do_mmap+0x854/0xf00 [ 51.762620] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.763116] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 51.763679] ksys_mmap_pgoff+0x3af/0x500 [ 51.764188] do_syscall_64+0x3f/0x90 [ 51.764681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.765330] RIP: 0033:0x7f5398d74d82 [ 51.765786] 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 [ 51.767918] RSP: 002b:00007fff381c0248 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 51.768830] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5398d74d82 [ 51.769681] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f53981ae000 [ 51.770525] RBP: 00007f53981ae000 R08: 0000000000000009 R09: 0000000000001000 [ 51.771378] R10: 0000000000000812 R11: 0000000000000206 R12: 000056308132dd90 [ 51.772235] R13: 00007fff381c0260 R14: 00007fff381c0290 R15: 00007fff381c05f0 [ 51.773114] [ 51.773408] [ 51.773627] Allocated by task 215: [ 51.774059] kasan_save_stack+0x22/0x50 [ 51.774568] kasan_set_track+0x25/0x30 [ 51.775062] __kasan_slab_alloc+0x59/0x70 [ 51.775592] kmem_cache_alloc+0x16b/0x370 [ 51.776110] vm_area_dup+0x20/0x160 [ 51.776573] __split_vma+0x170/0x950 [ 51.777046] split_vma+0xc6/0x110 [ 51.777488] mprotect_fixup+0x8d2/0xb30 [ 51.777990] do_mprotect_pkey+0x87e/0xd40 [ 51.778513] __x64_sys_mprotect+0x78/0xc0 [ 51.779037] do_syscall_64+0x3f/0x90 [ 51.779515] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.780157] [ 51.780372] Freed by task 215: [ 51.780773] kasan_save_stack+0x22/0x50 [ 51.781278] kasan_set_track+0x25/0x30 [ 51.781781] kasan_save_free_info+0x2b/0x50 [ 51.782318] __kasan_slab_free+0x10a/0x190 [ 51.782855] kmem_cache_free+0x10d/0x4d0 [ 51.783365] rcu_core+0x8c8/0x2860 [ 51.783809] __do_softirq+0x1b7/0x7d4 [ 51.784286] [ 51.784520] Last potentially related work creation: [ 51.785115] kasan_save_stack+0x22/0x50 [ 51.785634] __kasan_record_aux_stack+0x8e/0xa0 [ 51.786212] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.786863] remove_vma+0x139/0x170 [ 51.787315] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.787874] do_vmi_munmap+0x1f1/0x2b0 [ 51.788366] __vm_munmap+0x138/0x3a0 [ 51.788861] __x64_sys_munmap+0x59/0x80 [ 51.789365] do_syscall_64+0x3f/0x90 [ 51.789845] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.790512] [ 51.790729] The buggy address belongs to the object at ffff88800e2b70e8 [ 51.790729] which belongs to the cache vm_area_struct of size 168 [ 51.792209] The buggy address is located 88 bytes inside of [ 51.792209] freed 168-byte region [ffff88800e2b70e8, ffff88800e2b7190) [ 51.793648] [ 51.793866] The buggy address belongs to the physical page: [ 51.794530] page:0000000080fd5350 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2b7 [ 51.795619] memcg:ffff88800f00a401 [ 51.796045] flags: 0x100000000000200(slab|node=0|zone=1) [ 51.796715] page_type: 0xffffffff() [ 51.797172] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 51.798116] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f00a401 [ 51.799022] page dumped because: kasan: bad access detected [ 51.799688] [ 51.799904] Memory state around the buggy address: [ 51.800500] ffff88800e2b7000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 51.801365] ffff88800e2b7080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 51.802237] >ffff88800e2b7100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.803101] ^ [ 51.803732] ffff88800e2b7180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 51.804615] ffff88800e2b7200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 51.805485] ================================================================== [ 51.806483] Disabling lock debugging due to kernel taint [ 54.240874] BUG: Bad rss-counter state mm:00000000c2747124 type:MM_FILEPAGES val:33 [ 54.241868] BUG: Bad rss-counter state mm:00000000c2747124 type:MM_ANONPAGES val:22 [ 54.713098] BUG: Bad rss-counter state mm:00000000023119a7 type:MM_FILEPAGES val:33 [ 54.714116] BUG: Bad rss-counter state mm:00000000023119a7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41093' (ECDSA) to the list of known hosts. 2023/06/19 12:56:14 fuzzer started 2023/06/19 12:56:14 dialing manager at localhost:44161 2023/06/19 12:56:14 checking machine... 2023/06/19 12:56:14 checking revisions... [ 55.435698] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:56:15 testing simple program... [ 55.491954] cgroup: Unknown subsys name 'net' [ 55.527793] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:55:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800f0075c0 RCX=0000000000000001 RDX=1ffff11001e00eb9 RSI=ffffffff846000aa RDI=ffff88800f0075c8 RBP=000000000000000d RSP=ffff88800f0074d8 R8 =0000000000000001 R9 =ffff88800f007538 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88800f0075c0 R13=0000000000000000 R14=ffff88800f0dd1c0 R15=0000000000000200 RIP=ffffffff813ad47f 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 00007fc6385b9900 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=00007fc638b6e650 CR3=0000000009a24000 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=0000000080000102 RBX=0000000000000018 RCX=ffffffff813b9345 RDX=ffff888008d751c0 RSI=0000000000000100 RDI=0000000000000005 RBP=00000000007ffe20 RSP=ffff88806cf09df8 R8 =0000000000000005 R9 =0000000000000009 R10=0000000000000003 R11=000000174db1d3f8 R12=0000000000000001 R13=0000000000000003 R14=0000000000000100 R15=0000000000000007 RIP=ffffffff814c07eb RFL=00000097 [--S-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 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=00007ffe00b37248 CR3=000000000ee9e000 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=2034313a36353a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a36353a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000