syzkaller login: [ 30.716715] BUG: Bad rss-counter state mm:000000001b51518d type:MM_FILEPAGES val:33 [ 30.717868] BUG: Bad rss-counter state mm:000000001b51518d type:MM_ANONPAGES val:22 [ 30.851639] ================================================================== [ 30.852578] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.853522] Read of size 8 at addr ffff88800f128c20 by task sshd/219 [ 30.854295] [ 30.854513] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.855513] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.856489] Call Trace: [ 30.856812] [ 30.857101] dump_stack_lvl+0x91/0xf0 [ 30.857597] print_report+0xcc/0x620 [ 30.858088] ? __virt_addr_valid+0x102/0x340 [ 30.858642] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.859260] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.859886] kasan_report+0xbe/0xf0 [ 30.860371] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.860999] vma_interval_tree_remove+0xc75/0xec0 [ 30.861607] vma_prepare+0xc54/0x11a0 [ 30.862094] __split_vma+0x5af/0x950 [ 30.862573] ? __pfx___split_vma+0x10/0x10 [ 30.863112] ? find_held_lock+0x2c/0x110 [ 30.863667] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.864249] ? lock_is_held_type+0x9f/0x120 [ 30.864794] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.865401] ? mtree_range_walk+0x632/0x900 [ 30.865964] ? mas_walk+0x5c7/0x7c0 [ 30.866452] do_vmi_munmap+0x1f1/0x2b0 [ 30.866953] mmap_region+0x1f9/0x2660 [ 30.867441] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.867958] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.868682] ? __pfx_lock_acquire+0x10/0x10 [ 30.869219] ? __pfx_mmap_region+0x10/0x10 [ 30.869755] ? security_mmap_addr+0x7d/0xa0 [ 30.870287] ? get_unmapped_area+0x1f5/0x3f0 [ 30.870841] do_mmap+0x854/0xf00 [ 30.871286] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.871805] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.872374] ksys_mmap_pgoff+0x3af/0x500 [ 30.872886] do_syscall_64+0x3f/0x90 [ 30.873377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.874034] RIP: 0033:0x7fe85d127d82 [ 30.874501] 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 [ 30.876657] RSP: 002b:00007ffcb5e818f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.877564] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe85d127d82 [ 30.878420] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe85c561000 [ 30.879278] RBP: 00007fe85c561000 R08: 0000000000000009 R09: 0000000000001000 [ 30.880151] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562c3740af70 [ 30.881010] R13: 00007ffcb5e81910 R14: 00007ffcb5e81940 R15: 00007ffcb5e81ca0 [ 30.881878] [ 30.882171] [ 30.882386] Allocated by task 212: [ 30.882816] kasan_save_stack+0x22/0x50 [ 30.883326] kasan_set_track+0x25/0x30 [ 30.883835] __kasan_slab_alloc+0x59/0x70 [ 30.884361] kmem_cache_alloc+0x16b/0x370 [ 30.884886] vm_area_dup+0x20/0x160 [ 30.885339] __split_vma+0x170/0x950 [ 30.885805] split_vma+0xc6/0x110 [ 30.886249] mprotect_fixup+0x8d2/0xb30 [ 30.886752] do_mprotect_pkey+0x87e/0xd40 [ 30.887276] __x64_sys_mprotect+0x78/0xc0 [ 30.887813] do_syscall_64+0x3f/0x90 [ 30.888284] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.888927] [ 30.889141] Freed by task 212: [ 30.889534] kasan_save_stack+0x22/0x50 [ 30.890033] kasan_set_track+0x25/0x30 [ 30.890528] kasan_save_free_info+0x2b/0x50 [ 30.891063] __kasan_slab_free+0x10a/0x190 [ 30.891618] kmem_cache_free+0x10d/0x4d0 [ 30.892128] rcu_core+0x8c8/0x2860 [ 30.892582] __do_softirq+0x1b7/0x7d4 [ 30.893058] [ 30.893273] Last potentially related work creation: [ 30.893863] kasan_save_stack+0x22/0x50 [ 30.894373] __kasan_record_aux_stack+0x8e/0xa0 [ 30.894946] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.895599] remove_vma+0x139/0x170 [ 30.896060] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.896627] do_vmi_munmap+0x1f1/0x2b0 [ 30.897121] __vm_munmap+0x138/0x3a0 [ 30.897594] __x64_sys_munmap+0x59/0x80 [ 30.898092] do_syscall_64+0x3f/0x90 [ 30.898579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.899226] [ 30.899456] The buggy address belongs to the object at ffff88800f128bc8 [ 30.899456] which belongs to the cache vm_area_struct of size 168 [ 30.900877] The buggy address is located 88 bytes inside of [ 30.900877] freed 168-byte region [ffff88800f128bc8, ffff88800f128c70) [ 30.902189] [ 30.902396] The buggy address belongs to the physical page: [ 30.903019] page:00000000515cc4ba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf128 [ 30.904050] memcg:ffff888010243401 [ 30.904453] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.905057] page_type: 0xffffffff() [ 30.905483] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.906341] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010243401 [ 30.907194] page dumped because: kasan: bad access detected [ 30.907834] [ 30.908039] Memory state around the buggy address: [ 30.908589] ffff88800f128b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.909407] ffff88800f128b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.910256] >ffff88800f128c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.911106] ^ [ 30.911633] ffff88800f128c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.912468] ffff88800f128d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.913317] ================================================================== [ 30.914291] Disabling lock debugging due to kernel taint [ 32.972739] BUG: Bad rss-counter state mm:00000000fb0d1a74 type:MM_FILEPAGES val:33 [ 32.974380] BUG: Bad rss-counter state mm:00000000fb0d1a74 type:MM_ANONPAGES val:22 [ 33.398164] BUG: Bad rss-counter state mm:000000000f7c5c5e type:MM_FILEPAGES val:33 [ 33.399783] BUG: Bad rss-counter state mm:000000000f7c5c5e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49418' (ECDSA) to the list of known hosts. 2023/06/20 14:47:26 fuzzer started 2023/06/20 14:47:26 dialing manager at localhost:36067 2023/06/20 14:47:26 checking machine... 2023/06/20 14:47:26 checking revisions... [ 34.085543] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:47:26 testing simple program... [ 34.131073] cgroup: Unknown subsys name 'net' [ 34.189418] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:47:26 Registers: info registers vcpu 0 RAX=000000000000003f RBX=0000559175e573f0 RCX=0000000000000001 RDX=00007f54dbfd5a57 RSI=0000559175e573f0 RDI=00007fff4d0b57c0 RBP=0000000000000008 RSP=00007fff4d0b5700 R8 =0000559175e37ce0 R9 =00000000ffffffff R10=0000559175e31eb0 R11=0000000000000000 R12=0000559175e573f0 R13=0000559175e57450 R14=0000559175e5a480 R15=00007fff4d0b57c0 RIP=00007f54dbfc1364 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f54db485900 00000000 00000000 GS =0000 0000000000000000 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=00007f54dba3d0b0 CR3=000000001bcb2000 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=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 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=00007f14f1cd8b10 CR3=000000000d5e4000 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=b4f9ded7235636ba9847f403661f0d38 XMM02=2c67c8bc2e329bc3000000000011d9a8 XMM03=fb795ef6d65770560000000000122148 XMM04=1853f28e2f642cfd00000000000ae988 XMM05=a003b48ce65c84970000000000132d58 XMM06=806171799158d9670000000000131df8 XMM07=e042d86d42eb936e00000000001223c8 XMM08=668b23fa6da24979000000000011da08 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000