syzkaller login: [ 31.192842] BUG: Bad rss-counter state mm:00000000e8e9865d type:MM_FILEPAGES val:33 [ 31.194113] BUG: Bad rss-counter state mm:00000000e8e9865d type:MM_ANONPAGES val:22 [ 31.284950] ================================================================== [ 31.285892] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.286846] Read of size 8 at addr ffff888019963968 by task sshd/220 [ 31.287621] [ 31.287914] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.288905] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.289993] Call Trace: [ 31.290346] [ 31.290669] dump_stack_lvl+0x91/0xf0 [ 31.291224] print_report+0xcc/0x620 [ 31.291754] ? __virt_addr_valid+0x102/0x340 [ 31.292396] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.293081] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.293752] kasan_report+0xbe/0xf0 [ 31.294266] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.294956] vma_interval_tree_remove+0xc75/0xec0 [ 31.295631] vma_prepare+0xc54/0x11a0 [ 31.296151] __split_vma+0x5af/0x950 [ 31.296702] ? __pfx___split_vma+0x10/0x10 [ 31.297286] ? find_held_lock+0x2c/0x110 [ 31.297859] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.298483] ? lock_is_held_type+0x9f/0x120 [ 31.299067] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.299729] ? mtree_range_walk+0x632/0x900 [ 31.300350] ? mas_walk+0x5c7/0x7c0 [ 31.300872] do_vmi_munmap+0x1f1/0x2b0 [ 31.301414] mmap_region+0x1f9/0x2660 [ 31.301949] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.302508] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.303276] ? __pfx_lock_acquire+0x10/0x10 [ 31.303818] ? __pfx_mmap_region+0x10/0x10 [ 31.304371] ? security_mmap_addr+0x7d/0xa0 [ 31.304904] ? get_unmapped_area+0x1f5/0x3f0 [ 31.305449] do_mmap+0x854/0xf00 [ 31.305887] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.306385] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.306943] ksys_mmap_pgoff+0x3af/0x500 [ 31.307451] do_syscall_64+0x3f/0x90 [ 31.307922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.308577] RIP: 0033:0x7fe929bcdd82 [ 31.309034] 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 [ 31.311134] RSP: 002b:00007ffdb0e1be28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.312036] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe929bcdd82 [ 31.312892] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe929007000 [ 31.313728] RBP: 00007fe929007000 R08: 0000000000000009 R09: 0000000000001000 [ 31.314568] R10: 0000000000000812 R11: 0000000000000206 R12: 00005610927dfec0 [ 31.315412] R13: 00007ffdb0e1be40 R14: 00007ffdb0e1be70 R15: 00007ffdb0e1c1d0 [ 31.316283] [ 31.316574] [ 31.316787] Allocated by task 213: [ 31.317219] kasan_save_stack+0x22/0x50 [ 31.317720] kasan_set_track+0x25/0x30 [ 31.318204] __kasan_slab_alloc+0x59/0x70 [ 31.318720] kmem_cache_alloc+0x16b/0x370 [ 31.319230] vm_area_dup+0x20/0x160 [ 31.319681] __split_vma+0x170/0x950 [ 31.320137] split_vma+0xc6/0x110 [ 31.320581] mprotect_fixup+0x8d2/0xb30 [ 31.321078] do_mprotect_pkey+0x87e/0xd40 [ 31.321599] __x64_sys_mprotect+0x78/0xc0 [ 31.322113] do_syscall_64+0x3f/0x90 [ 31.322583] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.323220] [ 31.323431] Freed by task 213: [ 31.323814] kasan_save_stack+0x22/0x50 [ 31.324312] kasan_set_track+0x25/0x30 [ 31.324803] kasan_save_free_info+0x2b/0x50 [ 31.325326] __kasan_slab_free+0x10a/0x190 [ 31.325856] kmem_cache_free+0x10d/0x4d0 [ 31.326358] rcu_core+0x8c8/0x2860 [ 31.326800] __do_softirq+0x1b7/0x7d4 [ 31.327278] [ 31.327496] Last potentially related work creation: [ 31.328076] kasan_save_stack+0x22/0x50 [ 31.328602] __kasan_record_aux_stack+0x8e/0xa0 [ 31.329167] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.329807] remove_vma+0x139/0x170 [ 31.330261] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.330815] do_vmi_munmap+0x1f1/0x2b0 [ 31.331294] __vm_munmap+0x138/0x3a0 [ 31.331758] __x64_sys_munmap+0x59/0x80 [ 31.332251] do_syscall_64+0x3f/0x90 [ 31.332721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.333354] [ 31.333565] The buggy address belongs to the object at ffff888019963910 [ 31.333565] which belongs to the cache vm_area_struct of size 168 [ 31.335012] The buggy address is located 88 bytes inside of [ 31.335012] freed 168-byte region [ffff888019963910, ffff8880199639b8) [ 31.336415] [ 31.336627] The buggy address belongs to the physical page: [ 31.337273] page:000000004ec5dfd0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19963 [ 31.338402] memcg:ffff8880199cfe01 [ 31.338848] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.339500] page_type: 0xffffffff() [ 31.339953] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.340902] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880199cfe01 [ 31.341823] page dumped because: kasan: bad access detected [ 31.342502] [ 31.342723] Memory state around the buggy address: [ 31.343315] ffff888019963800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.344186] ffff888019963880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.345090] >ffff888019963900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.345964] ^ [ 31.346775] ffff888019963980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.347655] ffff888019963a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.348536] ================================================================== [ 31.349632] Disabling lock debugging due to kernel taint [ 33.271161] BUG: Bad rss-counter state mm:000000006a35bce3 type:MM_FILEPAGES val:33 [ 33.272154] BUG: Bad rss-counter state mm:000000006a35bce3 type:MM_ANONPAGES val:22 [ 33.740934] BUG: Bad rss-counter state mm:0000000070d2faa9 type:MM_FILEPAGES val:33 [ 33.742024] BUG: Bad rss-counter state mm:0000000070d2faa9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4933' (ECDSA) to the list of known hosts. 2023/06/20 23:33:34 fuzzer started 2023/06/20 23:33:34 dialing manager at localhost:36067 2023/06/20 23:33:34 checking machine... 2023/06/20 23:33:34 checking revisions... [ 34.410429] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:33:34 testing simple program... [ 34.473536] cgroup: Unknown subsys name 'net' [ 34.543019] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:33:34 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=0000000000000001 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=00007ffc3710bc38 CR3=0000000005482000 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=00007f3f3629a510000055d755042790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff88806cf09ff0 RSI=ffff88806cf09fb8 RDI=ffff88806cf09a80 RBP=ffff88806cf09b08 RSP=ffff88806cf09a60 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff8880145851c0 R15=ffff88806cf09a70 RIP=ffffffff81130937 RFL=00000282 [--S----] 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 00007f999415c900 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=00007efc07f74650 CR3=000000000d80e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=2db4bf0e626bd1dc00000000000ae988 XMM05=544f31a6e15fe34b0000000000133190 XMM06=19e9129bd510f2350000000000132028 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000