syzkaller login: [ 42.359073] BUG: Bad rss-counter state mm:0000000043b7b902 type:MM_FILEPAGES val:33 [ 42.360262] BUG: Bad rss-counter state mm:0000000043b7b902 type:MM_ANONPAGES val:22 [ 42.397073] ================================================================== [ 42.398115] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.399241] Read of size 8 at addr ffff888016ff3310 by task sshd/219 [ 42.400099] [ 42.400437] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.401372] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.402451] Call Trace: [ 42.402822] [ 42.403204] dump_stack_lvl+0x91/0xf0 [ 42.403733] print_report+0xcc/0x620 [ 42.404272] ? __virt_addr_valid+0x102/0x340 [ 42.404920] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.405684] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.406371] kasan_report+0xbe/0xf0 [ 42.406865] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.407596] vma_interval_tree_remove+0xc75/0xec0 [ 42.408274] vma_prepare+0xc54/0x11a0 [ 42.408818] __split_vma+0x5af/0x950 [ 42.409318] ? __pfx___split_vma+0x10/0x10 [ 42.409848] ? find_held_lock+0x2c/0x110 [ 42.410504] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.411066] ? lock_is_held_type+0x9f/0x120 [ 42.411603] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.412208] ? mtree_range_walk+0x632/0x900 [ 42.412910] ? mas_walk+0x5c7/0x7c0 [ 42.413385] do_vmi_munmap+0x1f1/0x2b0 [ 42.414016] mmap_region+0x1f9/0x2660 [ 42.414649] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.415161] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.415985] ? __pfx_lock_acquire+0x10/0x10 [ 42.416583] ? __pfx_mmap_region+0x10/0x10 [ 42.417191] ? security_mmap_addr+0x7d/0xa0 [ 42.417849] ? get_unmapped_area+0x1f5/0x3f0 [ 42.418392] do_mmap+0x854/0xf00 [ 42.418831] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.419316] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.419880] ksys_mmap_pgoff+0x3af/0x500 [ 42.420382] do_syscall_64+0x3f/0x90 [ 42.420861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.421505] RIP: 0033:0x7f600ecc4d82 [ 42.421959] 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 [ 42.424068] RSP: 002b:00007ffec700d888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.424981] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f600ecc4d82 [ 42.425823] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f600e0fe000 [ 42.426663] RBP: 00007f600e0fe000 R08: 0000000000000009 R09: 0000000000001000 [ 42.427503] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563c7f7c0ec0 [ 42.428333] R13: 00007ffec700d8a0 R14: 00007ffec700d8d0 R15: 00007ffec700dc30 [ 42.429188] [ 42.429481] [ 42.429693] Allocated by task 211: [ 42.430117] kasan_save_stack+0x22/0x50 [ 42.430614] kasan_set_track+0x25/0x30 [ 42.431102] __kasan_slab_alloc+0x59/0x70 [ 42.431619] kmem_cache_alloc+0x16b/0x370 [ 42.432127] vm_area_dup+0x20/0x160 [ 42.432575] __split_vma+0x170/0x950 [ 42.433045] split_vma+0xc6/0x110 [ 42.433479] mprotect_fixup+0x8d2/0xb30 [ 42.433975] do_mprotect_pkey+0x87e/0xd40 [ 42.434490] __x64_sys_mprotect+0x78/0xc0 [ 42.435006] do_syscall_64+0x3f/0x90 [ 42.435474] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.436106] [ 42.436318] Freed by task 211: [ 42.436729] kasan_save_stack+0x22/0x50 [ 42.437224] kasan_set_track+0x25/0x30 [ 42.437714] kasan_save_free_info+0x2b/0x50 [ 42.438247] __kasan_slab_free+0x10a/0x190 [ 42.438772] kmem_cache_free+0x10d/0x4d0 [ 42.439276] rcu_core+0x8c8/0x2860 [ 42.439718] __do_softirq+0x1b7/0x7d4 [ 42.440192] [ 42.440411] Last potentially related work creation: [ 42.441000] kasan_save_stack+0x22/0x50 [ 42.441498] __kasan_record_aux_stack+0x8e/0xa0 [ 42.442146] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.442781] remove_vma+0x139/0x170 [ 42.443230] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.443784] do_vmi_munmap+0x1f1/0x2b0 [ 42.444269] __vm_munmap+0x138/0x3a0 [ 42.444747] __x64_sys_munmap+0x59/0x80 [ 42.445242] do_syscall_64+0x3f/0x90 [ 42.445709] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.446344] [ 42.446558] Second to last potentially related work creation: [ 42.447237] kasan_save_stack+0x22/0x50 [ 42.447738] __kasan_record_aux_stack+0x8e/0xa0 [ 42.448305] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.448966] remove_vma+0x139/0x170 [ 42.449423] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.449989] do_vmi_munmap+0x1f1/0x2b0 [ 42.450489] mmap_region+0x1f9/0x2660 [ 42.450974] do_mmap+0x854/0xf00 [ 42.451413] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.451911] ksys_mmap_pgoff+0x7d/0x500 [ 42.452408] do_syscall_64+0x3f/0x90 [ 42.452895] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.453550] [ 42.453767] The buggy address belongs to the object at ffff888016ff32b8 [ 42.453767] which belongs to the cache vm_area_struct of size 168 [ 42.455262] The buggy address is located 88 bytes inside of [ 42.455262] freed 168-byte region [ffff888016ff32b8, ffff888016ff3360) [ 42.456728] [ 42.456946] The buggy address belongs to the physical page: [ 42.457622] page:00000000d5503f41 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ff3 [ 42.458740] memcg:ffff888016fc5f01 [ 42.459174] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 42.459894] page_type: 0xffffffff() [ 42.460352] raw: 0100000000000200 ffff88800879fc80 ffffea000035dd80 dead000000000003 [ 42.461289] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016fc5f01 [ 42.462219] page dumped because: kasan: bad access detected [ 42.462906] [ 42.463124] Memory state around the buggy address: [ 42.463718] ffff888016ff3200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 42.464595] ffff888016ff3280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 42.465487] >ffff888016ff3300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 42.466354] ^ [ 42.466829] ffff888016ff3380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 42.467701] ffff888016ff3400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 42.468576] ================================================================== [ 42.469598] Disabling lock debugging due to kernel taint [ 45.299742] BUG: Bad rss-counter state mm:00000000c8ac0e57 type:MM_FILEPAGES val:33 [ 45.300807] BUG: Bad rss-counter state mm:00000000c8ac0e57 type:MM_ANONPAGES val:22 [ 45.862769] BUG: Bad rss-counter state mm:000000004dbbeb0c type:MM_FILEPAGES val:33 [ 45.863943] BUG: Bad rss-counter state mm:000000004dbbeb0c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51238' (ECDSA) to the list of known hosts. 2023/06/19 22:12:46 fuzzer started 2023/06/19 22:12:47 dialing manager at localhost:44161 2023/06/19 22:12:47 checking machine... 2023/06/19 22:12:47 checking revisions... [ 46.507394] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:12:47 testing simple program... [ 46.555013] cgroup: Unknown subsys name 'net' [ 46.614773] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:12:33 Registers: info registers vcpu 0 RAX=0000000000402c80 RBX=ffff8880100b2120 RCX=ffffea0000000000 RDX=0000000000000000 RSI=ffffffff81ef13be RDI=ffff8880087b03c0 RBP=ffff88800974fdb0 RSP=ffff88800974fd80 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff8880087b03c0 R13=ffff8880900b2120 R14=ffffffff81ef13be R15=ffff88800e2a6180 RIP=ffffffff818098c8 RFL=00000212 [----A--] 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 00007f63d5c94900 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=00007f63d512a7e0 CR3=000000000d796000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=839dd77c9a77086a00000000000ae988 XMM05=4e566b32f91cd2030000000000135768 XMM06=806171799158d9670000000000134808 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=ffffffff86137501 RDX=ffff88806cf09df0 RSI=0000000000000000 RDI=ffff88806cf09aa8 RBP=ffff88806cf02000 RSP=ffff88806cf09a68 R8 =ffffffff8613751e R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09de8 R15=ffff88806cf09a98 RIP=ffffffff81130930 RFL=00000296 [--S-AP-] 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 00007f7db2076900 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=00007ffc810a8000 CR3=000000000dbd2000 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=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