syzkaller login: [ 28.825428] BUG: Bad rss-counter state mm:00000000a098802e type:MM_FILEPAGES val:33 [ 28.826535] BUG: Bad rss-counter state mm:00000000a098802e type:MM_ANONPAGES val:22 [ 28.982134] ================================================================== [ 28.983110] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.984095] Read of size 8 at addr ffff88800cad5968 by task sshd/221 [ 28.984864] [ 28.985080] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.986075] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.987109] Call Trace: [ 28.987435] [ 28.987741] dump_stack_lvl+0x91/0xf0 [ 28.988230] print_report+0xcc/0x620 [ 28.988749] ? __virt_addr_valid+0x102/0x340 [ 28.989331] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.989949] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.990590] kasan_report+0xbe/0xf0 [ 28.991065] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.991687] vma_interval_tree_remove+0xc75/0xec0 [ 28.992295] vma_prepare+0xc54/0x11a0 [ 28.992777] __split_vma+0x5af/0x950 [ 28.993261] ? __pfx___split_vma+0x10/0x10 [ 28.993823] ? find_held_lock+0x2c/0x110 [ 28.994383] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.994952] ? lock_is_held_type+0x9f/0x120 [ 28.995492] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.996097] ? mtree_range_walk+0x632/0x900 [ 28.996647] ? mas_walk+0x5c7/0x7c0 [ 28.997133] do_vmi_munmap+0x1f1/0x2b0 [ 28.997623] mmap_region+0x1f9/0x2660 [ 28.998131] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.998668] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.999374] ? __pfx_lock_acquire+0x10/0x10 [ 28.999911] ? __pfx_mmap_region+0x10/0x10 [ 29.000469] ? security_mmap_addr+0x7d/0xa0 [ 29.001043] ? get_unmapped_area+0x1f5/0x3f0 [ 29.001594] do_mmap+0x854/0xf00 [ 29.002049] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.002585] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.003170] ksys_mmap_pgoff+0x3af/0x500 [ 29.003707] do_syscall_64+0x3f/0x90 [ 29.004184] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.004823] RIP: 0033:0x7febcf42cd82 [ 29.005281] 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 [ 29.007415] RSP: 002b:00007ffeed1e0a38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.008315] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007febcf42cd82 [ 29.009162] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007febce866000 [ 29.010006] RBP: 00007febce866000 R08: 0000000000000009 R09: 0000000000001000 [ 29.010872] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556ce5c33ec0 [ 29.011718] R13: 00007ffeed1e0a50 R14: 00007ffeed1e0a80 R15: 00007ffeed1e0de0 [ 29.012569] [ 29.012860] [ 29.013071] Allocated by task 213: [ 29.013502] kasan_save_stack+0x22/0x50 [ 29.014000] kasan_set_track+0x25/0x30 [ 29.014500] __kasan_slab_alloc+0x59/0x70 [ 29.015023] kmem_cache_alloc+0x16b/0x370 [ 29.015540] vm_area_dup+0x20/0x160 [ 29.015996] __split_vma+0x170/0x950 [ 29.016454] split_vma+0xc6/0x110 [ 29.016896] mprotect_fixup+0x8d2/0xb30 [ 29.017398] do_mprotect_pkey+0x87e/0xd40 [ 29.017920] __x64_sys_mprotect+0x78/0xc0 [ 29.018451] do_syscall_64+0x3f/0x90 [ 29.018931] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.019576] [ 29.019791] Freed by task 213: [ 29.020186] kasan_save_stack+0x22/0x50 [ 29.020695] kasan_set_track+0x25/0x30 [ 29.021193] kasan_save_free_info+0x2b/0x50 [ 29.021727] __kasan_slab_free+0x10a/0x190 [ 29.022277] kmem_cache_free+0x10d/0x4d0 [ 29.022789] rcu_core+0x8c8/0x2860 [ 29.023237] __do_softirq+0x1b7/0x7d4 [ 29.023717] [ 29.023934] Last potentially related work creation: [ 29.024528] kasan_save_stack+0x22/0x50 [ 29.025037] __kasan_record_aux_stack+0x8e/0xa0 [ 29.025615] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.026262] remove_vma+0x139/0x170 [ 29.026711] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.027268] do_vmi_munmap+0x1f1/0x2b0 [ 29.027760] __vm_munmap+0x138/0x3a0 [ 29.028227] __x64_sys_munmap+0x59/0x80 [ 29.028733] do_syscall_64+0x3f/0x90 [ 29.029210] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.029850] [ 29.030065] The buggy address belongs to the object at ffff88800cad5910 [ 29.030065] which belongs to the cache vm_area_struct of size 168 [ 29.031576] The buggy address is located 88 bytes inside of [ 29.031576] freed 168-byte region [ffff88800cad5910, ffff88800cad59b8) [ 29.033012] [ 29.033234] The buggy address belongs to the physical page: [ 29.033898] page:00000000869d0ef3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcad5 [ 29.034987] memcg:ffff88800dc9c401 [ 29.035413] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.036115] page_type: 0xffffffff() [ 29.036571] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 29.037519] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc9c401 [ 29.038452] page dumped because: kasan: bad access detected [ 29.039123] [ 29.039340] Memory state around the buggy address: [ 29.039920] ffff88800cad5800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 29.040780] ffff88800cad5880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 29.041669] >ffff88800cad5900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.042560] ^ [ 29.043374] ffff88800cad5980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 29.044261] ffff88800cad5a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.045150] ================================================================== [ 29.046150] Disabling lock debugging due to kernel taint [ 30.929495] BUG: Bad rss-counter state mm:00000000cac5e489 type:MM_FILEPAGES val:33 [ 30.930384] BUG: Bad rss-counter state mm:00000000cac5e489 type:MM_ANONPAGES val:22 [ 31.454069] BUG: Bad rss-counter state mm:00000000ea7d7e44 type:MM_FILEPAGES val:33 [ 31.455246] BUG: Bad rss-counter state mm:00000000ea7d7e44 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48280' (ECDSA) to the list of known hosts. 2023/06/20 19:49:13 fuzzer started 2023/06/20 19:49:14 dialing manager at localhost:36067 2023/06/20 19:49:14 checking machine... 2023/06/20 19:49:14 checking revisions... [ 32.036958] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:49:14 testing simple program... [ 32.089739] cgroup: Unknown subsys name 'net' [ 32.150834] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:49:13 Registers: info registers vcpu 0 RAX=1ffff11001d84ef7 RBX=ffff88800ec27788 RCX=1ffff1100131f8ac RDX=dffffc0000000000 RSI=ffff888009945220 RDI=ffff88800ec277b8 RBP=ffff8880098fc530 RSP=ffff8880141a76c8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888009945200 R13=0000000000000000 R14=ffff88800fcdf508 R15=ffff88800fcdf4c0 RIP=ffffffff8184767e RFL=00000046 [---Z-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 00007fe480588900 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=00007f078e170650 CR3=000000000d60e000 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=0b4d3bb896ca25a35940a517b3acecd2 XMM02=000000000011a6b8d59e07bde36eea69 XMM03=000000000011a800ec2efd57dc4c00df XMM04=39229d2da7d493d700000000000ae988 XMM05=942cd4f0855eec4f0000000000132fb0 XMM06=c291bd5c70af25b90000000000131da0 XMM07=fb795ef6d65770560000000000121920 XMM08=2c67c8bc2e329bc3000000000011a800 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86139701 RDX=1ffff11003434f48 RSI=ffffffff8180ca5a RDI=ffff88801a1a79e8 RBP=ffff88801a1a7a40 RSP=ffff88801a1a7978 R8 =ffffffff86139748 R9 =ffff88801a1a7a28 R10=0000000000038001 R11=0000000000020f03 R12=ffff88801a1a7ab0 R13=0000000000000000 R14=ffff888016950000 R15=ffff88801a1a79e8 RIP=ffffffff8113062c RFL=00000246 [---Z-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 00007f078dbbb900 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=00007f078e1730b0 CR3=00000000094c8000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=00000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=2f3a746f6f723a303a303a3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000