syzkaller login: [ 31.115098] BUG: Bad rss-counter state mm:00000000918b0511 type:MM_FILEPAGES val:33 [ 31.115867] BUG: Bad rss-counter state mm:00000000918b0511 type:MM_ANONPAGES val:22 [ 31.279930] ================================================================== [ 31.280848] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.281781] Read of size 8 at addr ffff88801aaf4058 by task sshd/219 [ 31.282573] [ 31.282798] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.283776] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.284759] Call Trace: [ 31.285098] <TASK> [ 31.285393] dump_stack_lvl+0x91/0xf0 [ 31.285886] print_report+0xcc/0x620 [ 31.286381] ? __virt_addr_valid+0x102/0x340 [ 31.286937] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.287553] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.288178] kasan_report+0xbe/0xf0 [ 31.288653] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.289272] vma_interval_tree_remove+0xc75/0xec0 [ 31.289881] vma_prepare+0xc54/0x11a0 [ 31.290387] __split_vma+0x5af/0x950 [ 31.290877] ? __pfx___split_vma+0x10/0x10 [ 31.291429] ? find_held_lock+0x2c/0x110 [ 31.291965] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.292544] ? lock_is_held_type+0x9f/0x120 [ 31.293095] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.293710] ? mtree_range_walk+0x632/0x900 [ 31.294315] ? mas_walk+0x5c7/0x7c0 [ 31.294816] do_vmi_munmap+0x1f1/0x2b0 [ 31.295317] mmap_region+0x1f9/0x2660 [ 31.295816] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.296350] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.297085] ? __pfx_lock_acquire+0x10/0x10 [ 31.297644] ? __pfx_mmap_region+0x10/0x10 [ 31.298183] ? security_mmap_addr+0x7d/0xa0 [ 31.298721] ? get_unmapped_area+0x1f5/0x3f0 [ 31.299280] do_mmap+0x854/0xf00 [ 31.299735] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.300244] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.300810] ksys_mmap_pgoff+0x3af/0x500 [ 31.301321] do_syscall_64+0x3f/0x90 [ 31.301818] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.302507] RIP: 0033:0x7f878a8ebd82 [ 31.302974] 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 [ 31.305175] RSP: 002b:00007ffec0d05af8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.306120] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f878a8ebd82 [ 31.307008] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8789d25000 [ 31.307890] RBP: 00007f8789d25000 R08: 0000000000000009 R09: 0000000000001000 [ 31.308763] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a384edcd90 [ 31.309645] R13: 00007ffec0d05b10 R14: 00007ffec0d05b40 R15: 00007ffec0d05ea0 [ 31.310540] </TASK> [ 31.310848] [ 31.311073] Allocated by task 212: [ 31.311518] kasan_save_stack+0x22/0x50 [ 31.312050] kasan_set_track+0x25/0x30 [ 31.312564] __kasan_slab_alloc+0x59/0x70 [ 31.313114] kmem_cache_alloc+0x16b/0x370 [ 31.313655] vm_area_dup+0x20/0x160 [ 31.314125] __split_vma+0x170/0x950 [ 31.314632] split_vma+0xc6/0x110 [ 31.315081] mprotect_fixup+0x8d2/0xb30 [ 31.315602] do_mprotect_pkey+0x87e/0xd40 [ 31.316136] __x64_sys_mprotect+0x78/0xc0 [ 31.316678] do_syscall_64+0x3f/0x90 [ 31.317178] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.317843] [ 31.318067] Freed by task 212: [ 31.318478] kasan_save_stack+0x22/0x50 [ 31.319002] kasan_set_track+0x25/0x30 [ 31.319516] kasan_save_free_info+0x2b/0x50 [ 31.320070] __kasan_slab_free+0x10a/0x190 [ 31.320620] kmem_cache_free+0x10d/0x4d0 [ 31.321141] rcu_core+0x8c8/0x2860 [ 31.321602] __do_softirq+0x1b7/0x7d4 [ 31.322098] [ 31.322350] Last potentially related work creation: [ 31.322963] kasan_save_stack+0x22/0x50 [ 31.323489] __kasan_record_aux_stack+0x8e/0xa0 [ 31.324085] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.324752] remove_vma+0x139/0x170 [ 31.325223] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.325804] do_vmi_munmap+0x1f1/0x2b0 [ 31.326309] __vm_munmap+0x138/0x3a0 [ 31.326801] __x64_sys_munmap+0x59/0x80 [ 31.327315] do_syscall_64+0x3f/0x90 [ 31.327816] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.328486] [ 31.328714] The buggy address belongs to the object at ffff88801aaf4000 [ 31.328714] which belongs to the cache vm_area_struct of size 168 [ 31.330248] The buggy address is located 88 bytes inside of [ 31.330248] freed 168-byte region [ffff88801aaf4000, ffff88801aaf40a8) [ 31.331740] [ 31.331963] The buggy address belongs to the physical page: [ 31.332647] page:0000000009b735db refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1aaf4 [ 31.333791] memcg:ffff888015e6f801 [ 31.334232] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.334918] page_type: 0xffffffff() [ 31.335385] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.336337] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015e6f801 [ 31.337272] page dumped because: kasan: bad access detected [ 31.337955] [ 31.338176] Memory state around the buggy address: [ 31.338783] ffff88801aaf3f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.339669] ffff88801aaf3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.340550] >ffff88801aaf4000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.341427] ^ [ 31.342183] ffff88801aaf4080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.343079] ffff88801aaf4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.343962] ================================================================== [ 31.345062] Disabling lock debugging due to kernel taint [ 33.165771] BUG: Bad rss-counter state mm:00000000d06176b6 type:MM_FILEPAGES val:33 [ 33.166546] BUG: Bad rss-counter state mm:00000000d06176b6 type:MM_ANONPAGES val:22 [ 33.661742] BUG: Bad rss-counter state mm:000000005c31e40b type:MM_FILEPAGES val:33 [ 33.663228] BUG: Bad rss-counter state mm:000000005c31e40b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15934' (ECDSA) to the list of known hosts. 2023/06/20 11:05:40 fuzzer started 2023/06/20 11:05:41 dialing manager at localhost:36067 2023/06/20 11:05:41 checking machine... 2023/06/20 11:05:41 checking revisions... [ 34.293557] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:05:41 testing simple program... [ 34.343966] cgroup: Unknown subsys name 'net' [ 34.387081] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:05:40 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=00007ffdf7a34368 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=00007fee34e54510000055d532339790 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=0000000000000000 RBX=0000000000000200 RCX=0000000000000000 RDX=ffff88800f46d1c0 RSI=ffffffff813c8a16 RDI=ffffffff813c8add RBP=ffff8880102efa18 RSP=ffff8880102ef940 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff8880102ef9b0 R13=ffffed100205df37 R14=ffffed100205df36 R15=ffff8880102ef9b8 RIP=ffffffff813c8a16 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0a7fb8c900 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=00007f0a7ef826f0 CR3=000000000d66a000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=321c9cf1620208f300000000000ae988 XMM05=857410a60df448ee0000000000132888 XMM06=806171799158d9670000000000131678 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000