syzkaller login: [ 30.140007] BUG: Bad rss-counter state mm:00000000f2558de9 type:MM_FILEPAGES val:33 [ 30.141287] BUG: Bad rss-counter state mm:00000000f2558de9 type:MM_ANONPAGES val:22 [ 30.251655] ================================================================== [ 30.252516] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.253411] Read of size 8 at addr ffff88800c7885c8 by task sshd/220 [ 30.254133] [ 30.254347] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.255262] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.256174] Call Trace: [ 30.256474] [ 30.256742] dump_stack_lvl+0x91/0xf0 [ 30.257232] print_report+0xcc/0x620 [ 30.257694] ? __virt_addr_valid+0x102/0x340 [ 30.258212] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.258793] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.259376] kasan_report+0xbe/0xf0 [ 30.259823] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.260412] vma_interval_tree_remove+0xc75/0xec0 [ 30.260979] vma_prepare+0xc54/0x11a0 [ 30.261462] __split_vma+0x5af/0x950 [ 30.261943] ? __pfx___split_vma+0x10/0x10 [ 30.262515] ? find_held_lock+0x2c/0x110 [ 30.263032] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.263591] ? lock_is_held_type+0x9f/0x120 [ 30.264124] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.264730] ? mtree_range_walk+0x632/0x900 [ 30.265301] ? mas_walk+0x5c7/0x7c0 [ 30.265782] do_vmi_munmap+0x1f1/0x2b0 [ 30.266265] mmap_region+0x1f9/0x2660 [ 30.266738] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.267251] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.267952] ? __pfx_lock_acquire+0x10/0x10 [ 30.268481] ? __pfx_mmap_region+0x10/0x10 [ 30.269015] ? security_mmap_addr+0x7d/0xa0 [ 30.269558] ? get_unmapped_area+0x1f5/0x3f0 [ 30.270109] do_mmap+0x854/0xf00 [ 30.270540] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.271031] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.271590] ksys_mmap_pgoff+0x3af/0x500 [ 30.272092] do_syscall_64+0x3f/0x90 [ 30.272557] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.273212] RIP: 0033:0x7f5785041d82 [ 30.273663] 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 [ 30.275846] RSP: 002b:00007ffcd94122d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.276748] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5785041d82 [ 30.277612] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f578447b000 [ 30.278460] RBP: 00007f578447b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.279337] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557b122dcf70 [ 30.280201] R13: 00007ffcd94122f0 R14: 00007ffcd9412320 R15: 00007ffcd9412680 [ 30.281048] [ 30.281353] [ 30.281567] Allocated by task 213: [ 30.281998] kasan_save_stack+0x22/0x50 [ 30.282506] kasan_set_track+0x25/0x30 [ 30.283004] __kasan_slab_alloc+0x59/0x70 [ 30.283530] kmem_cache_alloc+0x16b/0x370 [ 30.284047] vm_area_dup+0x20/0x160 [ 30.284498] __split_vma+0x170/0x950 [ 30.284969] split_vma+0xc6/0x110 [ 30.285436] mprotect_fixup+0x8d2/0xb30 [ 30.285940] do_mprotect_pkey+0x87e/0xd40 [ 30.286469] __x64_sys_mprotect+0x78/0xc0 [ 30.286991] do_syscall_64+0x3f/0x90 [ 30.287465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.288112] [ 30.288326] Freed by task 213: [ 30.288719] kasan_save_stack+0x22/0x50 [ 30.289225] kasan_set_track+0x25/0x30 [ 30.289736] kasan_save_free_info+0x2b/0x50 [ 30.290302] __kasan_slab_free+0x10a/0x190 [ 30.290873] kmem_cache_free+0x10d/0x4d0 [ 30.291351] rcu_core+0x8c8/0x2860 [ 30.291770] __do_softirq+0x1b7/0x7d4 [ 30.292222] [ 30.292430] Last potentially related work creation: [ 30.292980] kasan_save_stack+0x22/0x50 [ 30.293465] __kasan_record_aux_stack+0x8e/0xa0 [ 30.294013] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.294624] remove_vma+0x139/0x170 [ 30.295050] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.295577] do_vmi_munmap+0x1f1/0x2b0 [ 30.296040] __vm_munmap+0x138/0x3a0 [ 30.296480] __x64_sys_munmap+0x59/0x80 [ 30.296948] do_syscall_64+0x3f/0x90 [ 30.297416] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.298019] [ 30.298225] The buggy address belongs to the object at ffff88800c788570 [ 30.298225] which belongs to the cache vm_area_struct of size 168 [ 30.299597] The buggy address is located 88 bytes inside of [ 30.299597] freed 168-byte region [ffff88800c788570, ffff88800c788618) [ 30.300902] [ 30.301108] The buggy address belongs to the physical page: [ 30.301736] page:00000000179e828f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc788 [ 30.302747] memcg:ffff888014740801 [ 30.303153] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.303757] page_type: 0xffffffff() [ 30.304183] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.305045] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014740801 [ 30.305910] page dumped because: kasan: bad access detected [ 30.306523] [ 30.306730] Memory state around the buggy address: [ 30.307273] ffff88800c788480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.308076] ffff88800c788500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.308875] >ffff88800c788580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.309683] ^ [ 30.310305] ffff88800c788600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.311107] ffff88800c788680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.311902] ================================================================== [ 30.312847] Disabling lock debugging due to kernel taint [ 32.176394] BUG: Bad rss-counter state mm:00000000d02c8ac0 type:MM_FILEPAGES val:33 [ 32.177797] BUG: Bad rss-counter state mm:00000000d02c8ac0 type:MM_ANONPAGES val:22 [ 32.644083] BUG: Bad rss-counter state mm:00000000e1b92fe1 type:MM_FILEPAGES val:33 [ 32.645120] BUG: Bad rss-counter state mm:00000000e1b92fe1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30180' (ECDSA) to the list of known hosts. 2023/06/20 22:02:51 fuzzer started 2023/06/20 22:02:51 dialing manager at localhost:36067 2023/06/20 22:02:51 checking machine... 2023/06/20 22:02:51 checking revisions... [ 33.339728] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:02:51 testing simple program... [ 33.394822] cgroup: Unknown subsys name 'net' [ 33.432562] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:02:51 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 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=00007f9a01eab710 CR3=0000000019d38000 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=2030353a32303a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a32303a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff863b4448 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800b3af468 RSP=ffff88800b3af3a0 R8 =ffffffff863b444c R9 =ffff88800b3af450 R10=0000000000038001 R11=000000000008abe0 R12=ffff88800b3af470 R13=ffff88800b3af458 R14=0000000000000005 R15=ffff88800b3af410 RIP=ffffffff81130b1f RFL=00000297 [--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 00007fc0d4f23900 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=00007fc0d54da618 CR3=000000000e5ca000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000