syzkaller login: [ 60.233010] BUG: Bad rss-counter state mm:00000000496665f5 type:MM_FILEPAGES val:33 [ 60.234123] BUG: Bad rss-counter state mm:00000000496665f5 type:MM_ANONPAGES val:22 [ 60.401894] ================================================================== [ 60.402913] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.403951] Read of size 8 at addr ffff88800e2fcdf0 by task sshd/220 [ 60.405047] [ 60.405349] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.406304] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.407355] Call Trace: [ 60.407713] [ 60.408015] dump_stack_lvl+0x91/0xf0 [ 60.408539] print_report+0xcc/0x620 [ 60.409068] ? __virt_addr_valid+0x102/0x340 [ 60.409678] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.410363] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.411026] kasan_report+0xbe/0xf0 [ 60.411536] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.412215] vma_interval_tree_remove+0xc75/0xec0 [ 60.412877] vma_prepare+0xc54/0x11a0 [ 60.413386] __split_vma+0x5af/0x950 [ 60.413907] ? __pfx___split_vma+0x10/0x10 [ 60.414484] ? find_held_lock+0x2c/0x110 [ 60.415061] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.415675] ? lock_is_held_type+0x9f/0x120 [ 60.416255] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.416913] ? mtree_range_walk+0x632/0x900 [ 60.417505] ? mas_walk+0x5c7/0x7c0 [ 60.418028] do_vmi_munmap+0x1f1/0x2b0 [ 60.418575] mmap_region+0x1f9/0x2660 [ 60.419110] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.419665] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.420430] ? __pfx_lock_acquire+0x10/0x10 [ 60.421015] ? __pfx_mmap_region+0x10/0x10 [ 60.421585] ? security_mmap_addr+0x7d/0xa0 [ 60.422165] ? get_unmapped_area+0x1f5/0x3f0 [ 60.422792] do_mmap+0x854/0xf00 [ 60.423258] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.423814] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.424415] ksys_mmap_pgoff+0x3af/0x500 [ 60.424965] do_syscall_64+0x3f/0x90 [ 60.425474] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.426191] RIP: 0033:0x7f9d13ac8d82 [ 60.426704] 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 [ 60.429009] RSP: 002b:00007ffecf540988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.429986] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9d13ac8d82 [ 60.430920] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9d12f02000 [ 60.431843] RBP: 00007f9d12f02000 R08: 0000000000000009 R09: 0000000000001000 [ 60.432780] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557cbd2ddec0 [ 60.433704] R13: 00007ffecf5409a0 R14: 00007ffecf5409d0 R15: 00007ffecf540d30 [ 60.434655] [ 60.434971] [ 60.435200] Allocated by task 213: [ 60.435672] kasan_save_stack+0x22/0x50 [ 60.436209] kasan_set_track+0x25/0x30 [ 60.436752] __kasan_slab_alloc+0x59/0x70 [ 60.437309] kmem_cache_alloc+0x16b/0x370 [ 60.437875] vm_area_dup+0x20/0x160 [ 60.438373] __split_vma+0x170/0x950 [ 60.438885] split_vma+0xc6/0x110 [ 60.439356] mprotect_fixup+0x8d2/0xb30 [ 60.439905] do_mprotect_pkey+0x87e/0xd40 [ 60.440469] __x64_sys_mprotect+0x78/0xc0 [ 60.441046] do_syscall_64+0x3f/0x90 [ 60.441563] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.442285] [ 60.442521] Freed by task 213: [ 60.442956] kasan_save_stack+0x22/0x50 [ 60.443491] kasan_set_track+0x25/0x30 [ 60.444030] kasan_save_free_info+0x2b/0x50 [ 60.444610] __kasan_slab_free+0x10a/0x190 [ 60.445185] kmem_cache_free+0x10d/0x4d0 [ 60.445770] rcu_core+0x8c8/0x2860 [ 60.446430] __do_softirq+0x1b7/0x7d4 [ 60.446964] [ 60.447196] Last potentially related work creation: [ 60.447839] kasan_save_stack+0x22/0x50 [ 60.448378] __kasan_record_aux_stack+0x8e/0xa0 [ 60.449005] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.449716] remove_vma+0x139/0x170 [ 60.450212] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.450819] do_vmi_munmap+0x1f1/0x2b0 [ 60.451336] __vm_munmap+0x138/0x3a0 [ 60.451842] __x64_sys_munmap+0x59/0x80 [ 60.452372] do_syscall_64+0x3f/0x90 [ 60.452900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.453603] [ 60.453839] The buggy address belongs to the object at ffff88800e2fcd98 [ 60.453839] which belongs to the cache vm_area_struct of size 168 [ 60.455433] The buggy address is located 88 bytes inside of [ 60.455433] freed 168-byte region [ffff88800e2fcd98, ffff88800e2fce40) [ 60.456965] [ 60.457196] The buggy address belongs to the physical page: [ 60.457917] page:00000000170bf59c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2fc [ 60.459109] memcg:ffff88800e95c701 [ 60.459566] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.460271] page_type: 0xffffffff() [ 60.460780] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.461792] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e95c701 [ 60.462799] page dumped because: kasan: bad access detected [ 60.463509] [ 60.463761] Memory state around the buggy address: [ 60.464385] ffff88800e2fcc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 60.465324] ffff88800e2fcd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 60.466279] >ffff88800e2fcd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 60.467208] ^ [ 60.468081] ffff88800e2fce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 60.469016] ffff88800e2fce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.469948] ================================================================== [ 60.471020] Disabling lock debugging due to kernel taint [ 62.522788] BUG: Bad rss-counter state mm:000000003ba6c634 type:MM_FILEPAGES val:33 [ 62.523974] BUG: Bad rss-counter state mm:000000003ba6c634 type:MM_ANONPAGES val:22 [ 62.960628] BUG: Bad rss-counter state mm:00000000317240eb type:MM_FILEPAGES val:33 [ 62.961879] BUG: Bad rss-counter state mm:00000000317240eb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58488' (ECDSA) to the list of known hosts. 2023/06/21 08:49:58 fuzzer started 2023/06/21 08:49:59 dialing manager at localhost:36067 2023/06/21 08:49:59 checking machine... 2023/06/21 08:49:59 checking revisions... [ 63.676968] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:49:59 testing simple program... [ 63.736628] cgroup: Unknown subsys name 'net' [ 63.777326] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:49:58 Registers: info registers vcpu 0 RAX=1ffffffff0c271d6 RBX=0000000000000001 RCX=ffffffff86138eb0 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff8880165afa10 RBP=ffff8880165afa00 RSP=ffff8880165af938 R8 =ffffffff86138eb4 R9 =ffff8880165af9e8 R10=0000000000038001 R11=0000000000020d9c R12=ffff8880165afa08 R13=ffff8880165af9f0 R14=ffff8880165afd08 R15=ffff8880165af9a8 RIP=ffffffff81131118 RFL=00000213 [----A-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 00007f98706e6900 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=00007f9870c9e0b0 CR3=000000001a284000 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=ffff88806c400000 RBX=0000000021d758b1 RCX=ffff88806c7ac588 RDX=0000000000000011 RSI=0000000000000001 RDI=00000000e1b4847e RBP=ffff888009878280 RSP=ffff88801034f358 R8 =00000000a48a0069 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000dc0 R14=ffff88801034f3c0 R15=0000000000000011 RIP=ffffffff822704d3 RFL=00000206 [-----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 00007f592b532900 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=00007f592a974cc0 CR3=00000000141de000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=3fefd06f06f1859300000000000ae988 XMM05=ad7d1a9b117e0d7a0000000000133170 XMM06=4fda316b135da52b0000000000131f60 XMM07=fb795ef6d65770560000000000122188 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000