syzkaller login: [ 31.082615] BUG: Bad rss-counter state mm:0000000082f835bf type:MM_FILEPAGES val:33 [ 31.084159] BUG: Bad rss-counter state mm:0000000082f835bf type:MM_ANONPAGES val:22 [ 31.258577] ================================================================== [ 31.259665] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.260812] Read of size 8 at addr ffff888015b866b0 by task sshd/220 [ 31.261817] [ 31.262048] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.262963] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.264003] Call Trace: [ 31.264349] <TASK> [ 31.264648] dump_stack_lvl+0x91/0xf0 [ 31.265163] print_report+0xcc/0x620 [ 31.265675] ? __virt_addr_valid+0x102/0x340 [ 31.266259] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.266905] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.267560] kasan_report+0xbe/0xf0 [ 31.268060] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.268740] vma_interval_tree_remove+0xc75/0xec0 [ 31.269397] vma_prepare+0xc54/0x11a0 [ 31.269926] __split_vma+0x5af/0x950 [ 31.270441] ? __pfx___split_vma+0x10/0x10 [ 31.271015] ? find_held_lock+0x2c/0x110 [ 31.271590] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.272206] ? lock_is_held_type+0x9f/0x120 [ 31.272811] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.273470] ? mtree_range_walk+0x632/0x900 [ 31.274072] ? mas_walk+0x5c7/0x7c0 [ 31.274582] do_vmi_munmap+0x1f1/0x2b0 [ 31.275123] mmap_region+0x1f9/0x2660 [ 31.275653] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.276211] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.276998] ? __pfx_lock_acquire+0x10/0x10 [ 31.277576] ? __pfx_mmap_region+0x10/0x10 [ 31.278152] ? security_mmap_addr+0x7d/0xa0 [ 31.278731] ? get_unmapped_area+0x1f5/0x3f0 [ 31.279336] do_mmap+0x854/0xf00 [ 31.279822] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.280369] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.280982] ksys_mmap_pgoff+0x3af/0x500 [ 31.281538] do_syscall_64+0x3f/0x90 [ 31.282059] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.282766] RIP: 0033:0x7fcccbb81d82 [ 31.283275] 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 [ 31.285618] RSP: 002b:00007ffd77027c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.286588] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcccbb81d82 [ 31.287504] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcccafbb000 [ 31.288435] RBP: 00007fcccafbb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.289370] R10: 0000000000000812 R11: 0000000000000206 R12: 000056402c461f60 [ 31.290292] R13: 00007ffd77027c20 R14: 00007ffd77027c50 R15: 00007ffd77027fb0 [ 31.291213] </TASK> [ 31.291534] [ 31.291763] Allocated by task 213: [ 31.292250] kasan_save_stack+0x22/0x50 [ 31.292805] kasan_set_track+0x25/0x30 [ 31.293338] __kasan_slab_alloc+0x59/0x70 [ 31.293915] kmem_cache_alloc+0x16b/0x370 [ 31.294472] vm_area_dup+0x20/0x160 [ 31.294966] __split_vma+0x170/0x950 [ 31.295477] split_vma+0xc6/0x110 [ 31.295960] mprotect_fixup+0x8d2/0xb30 [ 31.296512] do_mprotect_pkey+0x87e/0xd40 [ 31.297078] __x64_sys_mprotect+0x78/0xc0 [ 31.297651] do_syscall_64+0x3f/0x90 [ 31.298174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.298879] [ 31.299112] Freed by task 19: [ 31.299521] kasan_save_stack+0x22/0x50 [ 31.300072] kasan_set_track+0x25/0x30 [ 31.300616] kasan_save_free_info+0x2b/0x50 [ 31.301195] __kasan_slab_free+0x10a/0x190 [ 31.301773] kmem_cache_free+0x10d/0x4d0 [ 31.302321] rcu_core+0x8c8/0x2860 [ 31.302807] __do_softirq+0x1b7/0x7d4 [ 31.303410] [ 31.303640] Last potentially related work creation: [ 31.304283] kasan_save_stack+0x22/0x50 [ 31.304836] __kasan_record_aux_stack+0x8e/0xa0 [ 31.305459] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.306160] remove_vma+0x139/0x170 [ 31.306652] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.307261] do_vmi_munmap+0x1f1/0x2b0 [ 31.307799] __vm_munmap+0x138/0x3a0 [ 31.308318] __x64_sys_munmap+0x59/0x80 [ 31.308859] do_syscall_64+0x3f/0x90 [ 31.309383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.310086] [ 31.310323] The buggy address belongs to the object at ffff888015b86658 [ 31.310323] which belongs to the cache vm_area_struct of size 168 [ 31.311931] The buggy address is located 88 bytes inside of [ 31.311931] freed 168-byte region [ffff888015b86658, ffff888015b86700) [ 31.313473] [ 31.313708] The buggy address belongs to the physical page: [ 31.314426] page:00000000fc2f4185 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b86 [ 31.315592] memcg:ffff888016833d01 [ 31.316053] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.316767] page_type: 0xffffffff() [ 31.317262] raw: 0100000000000200 ffff8880087a0c80 ffffea00003418c0 dead000000000004 [ 31.318266] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016833d01 [ 31.319240] page dumped because: kasan: bad access detected [ 31.319947] [ 31.320180] Memory state around the buggy address: [ 31.320823] ffff888015b86580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.321743] ffff888015b86600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.322664] >ffff888015b86680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.323574] ^ [ 31.324205] ffff888015b86700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 31.325149] ffff888015b86780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.326064] ================================================================== [ 31.327090] Disabling lock debugging due to kernel taint [ 33.180404] BUG: Bad rss-counter state mm:00000000f33fe3e6 type:MM_FILEPAGES val:33 [ 33.181964] BUG: Bad rss-counter state mm:00000000f33fe3e6 type:MM_ANONPAGES val:22 [ 33.674819] BUG: Bad rss-counter state mm:0000000095e1914e type:MM_FILEPAGES val:33 [ 33.676002] BUG: Bad rss-counter state mm:0000000095e1914e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22846' (ECDSA) to the list of known hosts. 2023/06/20 11:53:05 fuzzer started 2023/06/20 11:53:05 dialing manager at localhost:36067 2023/06/20 11:53:05 checking machine... 2023/06/20 11:53:05 checking revisions... [ 34.471634] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:53:05 testing simple program... [ 34.529291] cgroup: Unknown subsys name 'net' [ 34.581868] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:53:04 Registers: info registers vcpu 0 RAX=ffffe8ffffc024a0 RBX=0000000000000d40 RCX=ffffffff812d86ea RDX=dffffc0000000000 RSI=0000000000000d40 RDI=000000000000a800 RBP=ffff8880147bf8e8 RSP=ffff8880147bf8a0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88800c357640 R13=0000000000000000 R14=0000000000000000 R15=ffffffff81c619e4 RIP=ffffffff81807fa4 RFL=00000286 [--S--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fed04cce900 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=00007fed040c00b0 CR3=000000000d8fe000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=37f8cdaf5caf360c00000000000ae988 XMM05=f40bf1bdff3eace00000000000132ab8 XMM06=4fda316b135da52b00000000001318a8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000170cd5c42c RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000017 RSI=ffff88806cf28140 RDI=00000000000533dc RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000ee478 R11=0000000000000001 R12=00000000000533dc R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff81106295 RFL=00000016 [----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 00007fcb5f320900 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=00007fcb5f8d7618 CR3=000000000c5f6000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000