syzkaller login: [ 30.678907] BUG: Bad rss-counter state mm:00000000a980dc7d type:MM_FILEPAGES val:33 [ 30.680391] BUG: Bad rss-counter state mm:00000000a980dc7d type:MM_ANONPAGES val:22 [ 30.823451] ================================================================== [ 30.824344] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.825268] Read of size 8 at addr ffff888017f89058 by task sshd/220 [ 30.826038] [ 30.826262] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.827285] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.828263] Call Trace: [ 30.828589] [ 30.828876] dump_stack_lvl+0x91/0xf0 [ 30.829381] print_report+0xcc/0x620 [ 30.829870] ? __virt_addr_valid+0x102/0x340 [ 30.830444] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.831057] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.831676] kasan_report+0xbe/0xf0 [ 30.832147] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.832796] vma_interval_tree_remove+0xc75/0xec0 [ 30.833414] vma_prepare+0xc54/0x11a0 [ 30.833915] __split_vma+0x5af/0x950 [ 30.834411] ? __pfx___split_vma+0x10/0x10 [ 30.834967] ? find_held_lock+0x2c/0x110 [ 30.835509] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.836099] ? lock_is_held_type+0x9f/0x120 [ 30.836658] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.837290] ? mtree_range_walk+0x632/0x900 [ 30.837869] ? mas_walk+0x5c7/0x7c0 [ 30.838376] do_vmi_munmap+0x1f1/0x2b0 [ 30.838887] mmap_region+0x1f9/0x2660 [ 30.839393] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.839922] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.840664] ? __pfx_lock_acquire+0x10/0x10 [ 30.841225] ? __pfx_mmap_region+0x10/0x10 [ 30.841780] ? security_mmap_addr+0x7d/0xa0 [ 30.842350] ? get_unmapped_area+0x1f5/0x3f0 [ 30.842926] do_mmap+0x854/0xf00 [ 30.843388] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.843907] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.844492] ksys_mmap_pgoff+0x3af/0x500 [ 30.845016] do_syscall_64+0x3f/0x90 [ 30.845515] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.846186] RIP: 0033:0x7f76f4ceed82 [ 30.846675] 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 [ 30.848908] RSP: 002b:00007ffc36198d28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.849845] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f76f4ceed82 [ 30.850758] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f76f4128000 [ 30.851656] RBP: 00007f76f4128000 R08: 0000000000000009 R09: 0000000000001000 [ 30.852549] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dbb8230ec0 [ 30.853436] R13: 00007ffc36198d40 R14: 00007ffc36198d70 R15: 00007ffc361990d0 [ 30.854331] [ 30.854638] [ 30.854862] Allocated by task 213: [ 30.855308] kasan_save_stack+0x22/0x50 [ 30.855832] kasan_set_track+0x25/0x30 [ 30.856343] __kasan_slab_alloc+0x59/0x70 [ 30.856889] kmem_cache_alloc+0x16b/0x370 [ 30.857433] vm_area_dup+0x20/0x160 [ 30.857900] __split_vma+0x170/0x950 [ 30.858396] split_vma+0xc6/0x110 [ 30.858848] mprotect_fixup+0x8d2/0xb30 [ 30.859371] do_mprotect_pkey+0x87e/0xd40 [ 30.859912] __x64_sys_mprotect+0x78/0xc0 [ 30.860458] do_syscall_64+0x3f/0x90 [ 30.860956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.861620] [ 30.861841] Freed by task 213: [ 30.862248] kasan_save_stack+0x22/0x50 [ 30.862792] kasan_set_track+0x25/0x30 [ 30.863304] kasan_save_free_info+0x2b/0x50 [ 30.863852] __kasan_slab_free+0x10a/0x190 [ 30.864408] kmem_cache_free+0x10d/0x4d0 [ 30.864931] rcu_core+0x8c8/0x2860 [ 30.865394] __do_softirq+0x1b7/0x7d4 [ 30.865893] [ 30.866118] Last potentially related work creation: [ 30.866741] kasan_save_stack+0x22/0x50 [ 30.867267] __kasan_record_aux_stack+0x8e/0xa0 [ 30.867860] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.868579] remove_vma+0x139/0x170 [ 30.869045] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.869626] do_vmi_munmap+0x1f1/0x2b0 [ 30.870132] __vm_munmap+0x138/0x3a0 [ 30.870644] __x64_sys_munmap+0x59/0x80 [ 30.871149] do_syscall_64+0x3f/0x90 [ 30.871639] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.872304] [ 30.872527] The buggy address belongs to the object at ffff888017f89000 [ 30.872527] which belongs to the cache vm_area_struct of size 168 [ 30.874083] The buggy address is located 88 bytes inside of [ 30.874083] freed 168-byte region [ffff888017f89000, ffff888017f890a8) [ 30.875549] [ 30.875770] The buggy address belongs to the physical page: [ 30.876466] page:0000000044ef9325 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17f89 [ 30.877609] memcg:ffff888015989401 [ 30.878056] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.878749] page_type: 0xffffffff() [ 30.879225] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.880198] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015989401 [ 30.881146] page dumped because: kasan: bad access detected [ 30.881830] [ 30.882051] Memory state around the buggy address: [ 30.882669] ffff888017f88f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.883551] ffff888017f88f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.884441] >ffff888017f89000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.885330] ^ [ 30.886098] ffff888017f89080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 30.887004] ffff888017f89100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.887891] ================================================================== [ 30.888930] Disabling lock debugging due to kernel taint [ 32.827155] BUG: Bad rss-counter state mm:000000009c8b4494 type:MM_FILEPAGES val:33 [ 32.828101] BUG: Bad rss-counter state mm:000000009c8b4494 type:MM_ANONPAGES val:22 [ 33.302145] BUG: Bad rss-counter state mm:00000000130e13cd type:MM_FILEPAGES val:33 [ 33.302996] BUG: Bad rss-counter state mm:00000000130e13cd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11195' (ECDSA) to the list of known hosts. 2023/06/20 17:14:18 fuzzer started 2023/06/20 17:14:19 dialing manager at localhost:36067 2023/06/20 17:14:19 checking machine... 2023/06/20 17:14:19 checking revisions... [ 34.021034] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:14:19 testing simple program... [ 34.069039] cgroup: Unknown subsys name 'net' [ 34.123892] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:14:18 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880165c74c0 RCX=ffffffff86412c12 RDX=1ffff11002cb8e98 RSI=ffff8880165c7990 RDI=ffff8880165c74c0 RBP=ffff8880165c7990 RSP=ffff8880165c7418 R8 =0000000000000001 R9 =ffff8880165c7500 R10=0000000000038001 R11=000000000009a7d7 R12=0000000000000008 R13=ffff8880165c7508 R14=ffff8880165c7990 R15=ffff8880165c74c0 RIP=ffffffff81130416 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 00007f868dfe7700 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=00007f4d33ba6650 CR3=000000000de78000 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=00000000000000000000000000000000 XMM01=656e6e6f637369642064657669656365 XMM02=63736964203a31313a36313230362074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363132 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f43c71a9c30 CR3=000000000f540000 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=e42229c3247d4c8cad4233b603954542 XMM02=0000000000119eb0ec2efd57dc4c00df XMM03=00000000001217f8aa5bfb7af94e3d26 XMM04=2f0d53242a8fdae700000000000ae988 XMM05=19e9129bd510f2350000000000131670 XMM06=ae1ce42bc7f51a8b00000000001304d8 XMM07=e042d86d42eb936e0000000000121a78 XMM08=aa5bfb7af94e3d260000000000119f10 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000