[ 23.731890] BUG: Bad rss-counter state mm:000000006bcc2e9a type:MM_FILEPAGES val:33 [ 23.733357] BUG: Bad rss-counter state mm:000000006bcc2e9a type:MM_ANONPAGES val:22 [ 23.895693] ================================================================== [ 23.896606] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.897546] Read of size 8 at addr ffff88800e216df0 by task sshd/220 [ 23.898306] [ 23.898521] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.899569] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.900532] Call Trace: [ 23.900848] [ 23.901129] dump_stack_lvl+0x91/0xf0 [ 23.901647] print_report+0xcc/0x620 [ 23.902122] ? __virt_addr_valid+0x102/0x340 [ 23.902689] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.903297] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.903914] kasan_report+0xbe/0xf0 [ 23.904379] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.904992] vma_interval_tree_remove+0xc75/0xec0 [ 23.905606] vma_prepare+0xc54/0x11a0 [ 23.906082] __split_vma+0x5af/0x950 [ 23.906555] ? __pfx___split_vma+0x10/0x10 [ 23.907078] ? find_held_lock+0x2c/0x110 [ 23.907611] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.908169] ? lock_is_held_type+0x9f/0x120 [ 23.908712] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.909314] ? mtree_range_walk+0x632/0x900 [ 23.909861] ? mas_walk+0x5c7/0x7c0 [ 23.910337] do_vmi_munmap+0x1f1/0x2b0 [ 23.910828] mmap_region+0x1f9/0x2660 [ 23.911303] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.911831] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.912537] ? __pfx_lock_acquire+0x10/0x10 [ 23.913073] ? __pfx_mmap_region+0x10/0x10 [ 23.913601] ? security_mmap_addr+0x7d/0xa0 [ 23.914133] ? get_unmapped_area+0x1f5/0x3f0 [ 23.914684] do_mmap+0x854/0xf00 [ 23.915125] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.915624] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.916179] ksys_mmap_pgoff+0x3af/0x500 [ 23.916687] do_syscall_64+0x3f/0x90 [ 23.917158] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.917798] RIP: 0033:0x7f9ce21e7d82 [ 23.918253] 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 [ 23.920368] RSP: 002b:00007ffe875b7228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.921256] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9ce21e7d82 [ 23.922104] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9ce1621000 [ 23.922937] RBP: 00007f9ce1621000 R08: 0000000000000009 R09: 0000000000001000 [ 23.923779] R10: 0000000000000812 R11: 0000000000000206 R12: 000055adc6f56ec0 [ 23.924608] R13: 00007ffe875b7240 R14: 00007ffe875b7270 R15: 00007ffe875b75d0 [ 23.925457] [ 23.925744] [ 23.925962] Allocated by task 213: [ 23.926383] kasan_save_stack+0x22/0x50 [ 23.926891] kasan_set_track+0x25/0x30 [ 23.927379] __kasan_slab_alloc+0x59/0x70 [ 23.927926] kmem_cache_alloc+0x16b/0x370 [ 23.928446] vm_area_dup+0x20/0x160 [ 23.928894] __split_vma+0x170/0x950 [ 23.929358] split_vma+0xc6/0x110 [ 23.929797] mprotect_fixup+0x8d2/0xb30 [ 23.930296] do_mprotect_pkey+0x87e/0xd40 [ 23.930820] __x64_sys_mprotect+0x78/0xc0 [ 23.931344] do_syscall_64+0x3f/0x90 [ 23.931835] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.932470] [ 23.932687] Freed by task 13: [ 23.933071] kasan_save_stack+0x22/0x50 [ 23.933575] kasan_set_track+0x25/0x30 [ 23.934068] kasan_save_free_info+0x2b/0x50 [ 23.934598] __kasan_slab_free+0x10a/0x190 [ 23.935125] kmem_cache_free+0x10d/0x4d0 [ 23.935641] rcu_core+0x8c8/0x2860 [ 23.936096] __do_softirq+0x1b7/0x7d4 [ 23.936575] [ 23.936792] Last potentially related work creation: [ 23.937374] kasan_save_stack+0x22/0x50 [ 23.937874] __kasan_record_aux_stack+0x8e/0xa0 [ 23.938445] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.939104] remove_vma+0x139/0x170 [ 23.939574] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.940207] do_vmi_munmap+0x1f1/0x2b0 [ 23.940686] __vm_munmap+0x138/0x3a0 [ 23.941154] __x64_sys_munmap+0x59/0x80 [ 23.941648] do_syscall_64+0x3f/0x90 [ 23.942119] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.942757] [ 23.942972] The buggy address belongs to the object at ffff88800e216d98 [ 23.942972] which belongs to the cache vm_area_struct of size 168 [ 23.944436] The buggy address is located 88 bytes inside of [ 23.944436] freed 168-byte region [ffff88800e216d98, ffff88800e216e40) [ 23.945827] [ 23.946041] The buggy address belongs to the physical page: [ 23.946696] page:0000000001d90d02 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe216 [ 23.947826] memcg:ffff88800dd8ca01 [ 23.948264] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.948985] page_type: 0xffffffff() [ 23.949450] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 23.950405] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd8ca01 [ 23.951328] page dumped because: kasan: bad access detected [ 23.952027] [ 23.952248] Memory state around the buggy address: [ 23.952836] ffff88800e216c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 23.953713] ffff88800e216d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 23.954603] >ffff88800e216d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 23.955485] ^ [ 23.956293] ffff88800e216e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 23.957161] ffff88800e216e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.958014] ================================================================== [ 23.958937] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.317718] BUG: Bad rss-counter state mm:00000000423b8169 type:MM_FILEPAGES val:33 [ 26.318707] BUG: Bad rss-counter state mm:00000000423b8169 type:MM_ANONPAGES val:22 [ 26.785094] BUG: Bad rss-counter state mm:00000000f2bfcb4b type:MM_FILEPAGES val:33 [ 26.786374] BUG: Bad rss-counter state mm:00000000f2bfcb4b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34165' (ECDSA) to the list of known hosts. 2023/06/20 20:46:02 fuzzer started 2023/06/20 20:46:02 dialing manager at localhost:36067 2023/06/20 20:46:02 checking machine... 2023/06/20 20:46:02 checking revisions... [ 27.512679] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:46:02 testing simple program... [ 27.565853] cgroup: Unknown subsys name 'net' [ 27.604073] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:46:01 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=ffff8880191f95b8 RCX=ffffffff81370ce8 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88806ce3a2c0 RBP=0000000000000000 RSP=ffff8880102b77d0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88806ce35000 R13=ffff88806ce3a3a8 R14=ffff88806ce3a2c0 R15=0000000000000000 RIP=ffffffff81371034 RFL=00000006 [-----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 00007fc91c750900 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=00007fc91bbd1cd0 CR3=0000000010372000 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=14516f78c76e76ec00000000000ae988 XMM05=c793f8f768c1949700000000001324c8 XMM06=4fda316b135da52b0000000000130f48 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8363b747 RBX=ffffffff85fa4f70 RCX=ffffffff8363b742 RDX=0000000000000000 RSI=ffffffff863b3584 RDI=ffffffff85fa4f6c RBP=ffffffff85fa4f6c RSP=ffff88800f6d79f8 R8 =ffffffff863b3584 R9 =ffff88800f6d7af0 R10=0000000000038001 R11=000000000008a96a R12=ffffffff85fa4f6c R13=ffffffff85fa4f6c R14=ffffffff85fa4f6c R15=dffffc0000000000 RIP=ffffffff8112fc9f RFL=00000293 [--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 00007f0d4629d900 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=00007fffd4932000 CR3=000000001a256000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000