syzkaller login: [ 91.236957] BUG: Bad rss-counter state mm:000000006f733a76 type:MM_FILEPAGES val:33 [ 91.238192] BUG: Bad rss-counter state mm:000000006f733a76 type:MM_ANONPAGES val:22 [ 91.420939] ================================================================== [ 91.421936] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 91.423073] Read of size 8 at addr ffff88800e0feb38 by task sshd/231 [ 91.423912] [ 91.424155] CPU: 0 PID: 231 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 91.425097] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 91.426201] Call Trace: [ 91.426552] [ 91.426899] dump_stack_lvl+0x91/0xf0 [ 91.427441] print_report+0xcc/0x620 [ 91.427975] ? __virt_addr_valid+0x102/0x340 [ 91.428605] ? vma_interval_tree_remove+0xc75/0xec0 [ 91.429278] ? vma_interval_tree_remove+0xc75/0xec0 [ 91.429952] kasan_report+0xbe/0xf0 [ 91.430484] ? vma_interval_tree_remove+0xc75/0xec0 [ 91.431192] vma_interval_tree_remove+0xc75/0xec0 [ 91.431883] vma_prepare+0xc54/0x11a0 [ 91.432434] __split_vma+0x5af/0x950 [ 91.432980] ? __pfx___split_vma+0x10/0x10 [ 91.433581] ? find_held_lock+0x2c/0x110 [ 91.434171] do_vmi_align_munmap+0x2ba/0x11f0 [ 91.434838] ? lock_is_held_type+0x9f/0x120 [ 91.435488] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 91.436175] ? mtree_range_walk+0x632/0x900 [ 91.436811] ? mas_walk+0x5c7/0x7c0 [ 91.437352] do_vmi_munmap+0x1f1/0x2b0 [ 91.437912] mmap_region+0x1f9/0x2660 [ 91.438470] ? vm_mmap_pgoff+0x15c/0x3a0 [ 91.439080] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 91.439901] ? __pfx_lock_acquire+0x10/0x10 [ 91.440509] ? __pfx_mmap_region+0x10/0x10 [ 91.441106] ? security_mmap_addr+0x7d/0xa0 [ 91.441711] ? get_unmapped_area+0x1f5/0x3f0 [ 91.442337] do_mmap+0x854/0xf00 [ 91.442854] vm_mmap_pgoff+0x1a6/0x3a0 [ 91.443406] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 91.444032] ksys_mmap_pgoff+0x3af/0x500 [ 91.444601] do_syscall_64+0x3f/0x90 [ 91.445147] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 91.445887] RIP: 0033:0x7f499d01dd82 [ 91.446407] 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 [ 91.448754] RSP: 002b:00007ffe5edbce18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 91.449729] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f499d01dd82 [ 91.450685] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f499c457000 [ 91.451616] RBP: 00007f499c457000 R08: 0000000000000009 R09: 0000000000001000 [ 91.452566] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558c1e998f70 [ 91.453511] R13: 00007ffe5edbce30 R14: 00007ffe5edbce60 R15: 00007ffe5edbd1c0 [ 91.454484] [ 91.454825] [ 91.455087] Allocated by task 221: [ 91.455593] kasan_save_stack+0x22/0x50 [ 91.456165] kasan_set_track+0x25/0x30 [ 91.456714] __kasan_slab_alloc+0x59/0x70 [ 91.457300] kmem_cache_alloc+0x16b/0x370 [ 91.457895] vm_area_dup+0x20/0x160 [ 91.458415] __split_vma+0x170/0x950 [ 91.458968] split_vma+0xc6/0x110 [ 91.459485] mprotect_fixup+0x8d2/0xb30 [ 91.460051] do_mprotect_pkey+0x87e/0xd40 [ 91.460638] __x64_sys_mprotect+0x78/0xc0 [ 91.461227] do_syscall_64+0x3f/0x90 [ 91.461773] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 91.462485] [ 91.462731] Freed by task 221: [ 91.463198] kasan_save_stack+0x22/0x50 [ 91.463797] kasan_set_track+0x25/0x30 [ 91.464395] kasan_save_free_info+0x2b/0x50 [ 91.465028] __kasan_slab_free+0x10a/0x190 [ 91.465651] kmem_cache_free+0x10d/0x4d0 [ 91.466272] rcu_core+0x8c8/0x2860 [ 91.466829] __do_softirq+0x1b7/0x7d4 [ 91.467399] [ 91.467659] Last potentially related work creation: [ 91.468345] kasan_save_stack+0x22/0x50 [ 91.468948] __kasan_record_aux_stack+0x8e/0xa0 [ 91.469636] __call_rcu_common.constprop.0+0x6a/0xb90 [ 91.470393] remove_vma+0x139/0x170 [ 91.470937] do_vmi_align_munmap+0xd4a/0x11f0 [ 91.471604] do_vmi_munmap+0x1f1/0x2b0 [ 91.472166] __vm_munmap+0x138/0x3a0 [ 91.472687] __x64_sys_munmap+0x59/0x80 [ 91.473231] do_syscall_64+0x3f/0x90 [ 91.473757] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 91.474463] [ 91.474722] The buggy address belongs to the object at ffff88800e0feae0 [ 91.474722] which belongs to the cache vm_area_struct of size 168 [ 91.476357] The buggy address is located 88 bytes inside of [ 91.476357] freed 168-byte region [ffff88800e0feae0, ffff88800e0feb88) [ 91.477917] [ 91.478163] The buggy address belongs to the physical page: [ 91.478920] page:0000000057539404 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0fe [ 91.480128] memcg:ffff88800e2ee101 [ 91.480614] flags: 0x100000000000200(slab|node=0|zone=1) [ 91.481324] page_type: 0xffffffff() [ 91.481818] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 91.482896] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2ee101 [ 91.483934] page dumped because: kasan: bad access detected [ 91.484684] [ 91.484943] Memory state around the buggy address: [ 91.485635] ffff88800e0fea00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 91.486691] ffff88800e0fea80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 91.487726] >ffff88800e0feb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 91.488767] ^ [ 91.489498] ffff88800e0feb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 91.490528] ffff88800e0fec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 91.491571] ================================================================== [ 91.492914] Disabling lock debugging due to kernel taint [ 93.738311] BUG: Bad rss-counter state mm:000000001fdab43b type:MM_FILEPAGES val:33 [ 93.740027] BUG: Bad rss-counter state mm:000000001fdab43b type:MM_ANONPAGES val:22 [ 94.261495] BUG: Bad rss-counter state mm:00000000b795912a type:MM_FILEPAGES val:33 [ 94.262617] BUG: Bad rss-counter state mm:00000000b795912a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24950' (ECDSA) to the list of known hosts. 2023/06/19 19:31:19 fuzzer started 2023/06/19 19:31:19 dialing manager at localhost:44161 2023/06/19 19:31:19 checking machine... 2023/06/19 19:31:19 checking revisions... [ 95.034931] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:31:19 testing simple program... [ 95.083082] cgroup: Unknown subsys name 'net' [ 95.128462] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:30:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=ffffffff860d6801 RDX=ffff88800dc279a8 RSI=ffffffff8180c522 RDI=ffff88800dc279a8 RBP=ffff88800dc27a40 RSP=ffff88800dc27990 R8 =ffffffff860d68fa R9 =ffff88800dc279e8 R10=0000000000038001 R11=0000000000010b7e R12=ffff88800dc27a70 R13=0000000000000000 R14=ffff88800f119b40 R15=ffff88800dc279a8 RIP=ffffffff811305e8 RFL=00000202 [-------] 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 00007fba3312c900 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=00007ffc2a553000 CR3=0000000015a44000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000050 RBX=ffff888009a08000 RCX=0000000000000000 RDX=00000000000101f7 RSI=ffffffff821920cb RDI=0000000000000007 RBP=00000000000003e7 RSP=ffff888010047388 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f7 R11=000000000002ff82 R12=00000000000101f7 R13=ffffed1001341001 R14=ffffffff85a237a0 R15=dffffc0000000000 RIP=ffffffff821920cf RFL=00000093 [--S-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 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=00007fc62fbba46c CR3=000000000e8da000 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=2038313a31333a3931203931206e754a XMM01=657463656e6e6f63736944203a5d3034 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3034325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a31333a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000