syzkaller login: [ 152.688002] BUG: Bad rss-counter state mm:00000000d2e1df40 type:MM_FILEPAGES val:33 [ 152.689493] BUG: Bad rss-counter state mm:00000000d2e1df40 type:MM_ANONPAGES val:22 [ 152.853200] ================================================================== [ 152.854118] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 152.855065] Read of size 8 at addr ffff88800e0843f8 by task sshd/220 [ 152.855840] [ 152.856166] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 152.857212] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 152.858207] Call Trace: [ 152.858525] [ 152.858811] dump_stack_lvl+0x91/0xf0 [ 152.859298] print_report+0xcc/0x620 [ 152.859780] ? __virt_addr_valid+0x102/0x340 [ 152.860345] ? vma_interval_tree_remove+0xc75/0xec0 [ 152.860979] ? vma_interval_tree_remove+0xc75/0xec0 [ 152.861598] kasan_report+0xbe/0xf0 [ 152.862074] ? vma_interval_tree_remove+0xc75/0xec0 [ 152.862702] vma_interval_tree_remove+0xc75/0xec0 [ 152.863307] vma_prepare+0xc54/0x11a0 [ 152.863797] __split_vma+0x5af/0x950 [ 152.864285] ? __pfx___split_vma+0x10/0x10 [ 152.864827] ? find_held_lock+0x2c/0x110 [ 152.865354] do_vmi_align_munmap+0x2ba/0x11f0 [ 152.865925] ? lock_is_held_type+0x9f/0x120 [ 152.866480] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 152.867093] ? mtree_range_walk+0x632/0x900 [ 152.867647] ? mas_walk+0x5c7/0x7c0 [ 152.868121] do_vmi_munmap+0x1f1/0x2b0 [ 152.868630] mmap_region+0x1f9/0x2660 [ 152.869129] ? vm_mmap_pgoff+0x15c/0x3a0 [ 152.869657] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 152.870372] ? __pfx_lock_acquire+0x10/0x10 [ 152.870912] ? __pfx_mmap_region+0x10/0x10 [ 152.871450] ? security_mmap_addr+0x7d/0xa0 [ 152.871989] ? get_unmapped_area+0x1f5/0x3f0 [ 152.872551] do_mmap+0x854/0xf00 [ 152.873009] vm_mmap_pgoff+0x1a6/0x3a0 [ 152.873506] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 152.874075] ksys_mmap_pgoff+0x3af/0x500 [ 152.874587] do_syscall_64+0x3f/0x90 [ 152.875074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 152.875738] RIP: 0033:0x7f5b51469d82 [ 152.876200] 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 [ 152.878334] RSP: 002b:00007fff7da0db18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 152.879251] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5b51469d82 [ 152.880110] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5b508a3000 [ 152.880974] RBP: 00007f5b508a3000 R08: 0000000000000009 R09: 0000000000001000 [ 152.881820] R10: 0000000000000812 R11: 0000000000000206 R12: 000055728d20cb20 [ 152.882681] R13: 00007fff7da0db30 R14: 00007fff7da0db60 R15: 00007fff7da0dec0 [ 152.883546] [ 152.883838] [ 152.884054] Allocated by task 213: [ 152.884484] kasan_save_stack+0x22/0x50 [ 152.885010] kasan_set_track+0x25/0x30 [ 152.885511] __kasan_slab_alloc+0x59/0x70 [ 152.886035] kmem_cache_alloc+0x16b/0x370 [ 152.886558] vm_area_dup+0x20/0x160 [ 152.887028] __split_vma+0x170/0x950 [ 152.887503] split_vma+0xc6/0x110 [ 152.887957] mprotect_fixup+0x8d2/0xb30 [ 152.888455] do_mprotect_pkey+0x87e/0xd40 [ 152.888989] __x64_sys_mprotect+0x78/0xc0 [ 152.889511] do_syscall_64+0x3f/0x90 [ 152.889983] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 152.890630] [ 152.890848] Freed by task 13: [ 152.891235] kasan_save_stack+0x22/0x50 [ 152.891746] kasan_set_track+0x25/0x30 [ 152.892252] kasan_save_free_info+0x2b/0x50 [ 152.892807] __kasan_slab_free+0x10a/0x190 [ 152.893340] kmem_cache_free+0x10d/0x4d0 [ 152.893846] rcu_core+0x8c8/0x2860 [ 152.894289] __do_softirq+0x1b7/0x7d4 [ 152.894774] [ 152.894993] Last potentially related work creation: [ 152.895584] kasan_save_stack+0x22/0x50 [ 152.896087] __kasan_record_aux_stack+0x8e/0xa0 [ 152.896674] __call_rcu_common.constprop.0+0x6a/0xb90 [ 152.897321] remove_vma+0x139/0x170 [ 152.897772] do_vmi_align_munmap+0xd4a/0x11f0 [ 152.898330] do_vmi_munmap+0x1f1/0x2b0 [ 152.898815] __vm_munmap+0x138/0x3a0 [ 152.899282] __x64_sys_munmap+0x59/0x80 [ 152.899776] do_syscall_64+0x3f/0x90 [ 152.900246] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 152.900897] [ 152.901115] The buggy address belongs to the object at ffff88800e0843a0 [ 152.901115] which belongs to the cache vm_area_struct of size 168 [ 152.902588] The buggy address is located 88 bytes inside of [ 152.902588] freed 168-byte region [ffff88800e0843a0, ffff88800e084448) [ 152.903994] [ 152.904212] The buggy address belongs to the physical page: [ 152.904901] page:000000009c149514 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe084 [ 152.906002] memcg:ffff88800eacd101 [ 152.906447] flags: 0x100000000000200(slab|node=0|zone=1) [ 152.907102] page_type: 0xffffffff() [ 152.907563] raw: 0100000000000200 ffff88800879fc80 ffffea00003c1140 dead000000000004 [ 152.908500] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eacd101 [ 152.909427] page dumped because: kasan: bad access detected [ 152.910090] [ 152.910307] Memory state around the buggy address: [ 152.910893] ffff88800e084280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 152.911761] ffff88800e084300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 152.912633] >ffff88800e084380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 152.913493] ^ [ 152.914326] ffff88800e084400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 152.915177] ffff88800e084480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 152.916036] ================================================================== [ 152.917066] Disabling lock debugging due to kernel taint [ 154.776714] BUG: Bad rss-counter state mm:00000000281df0ec type:MM_FILEPAGES val:33 [ 154.777759] BUG: Bad rss-counter state mm:00000000281df0ec type:MM_ANONPAGES val:22 [ 155.266569] BUG: Bad rss-counter state mm:000000003f48e414 type:MM_FILEPAGES val:33 [ 155.267604] BUG: Bad rss-counter state mm:000000003f48e414 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50291' (ECDSA) to the list of known hosts. 2023/06/19 23:57:58 fuzzer started 2023/06/19 23:57:59 dialing manager at localhost:44161 2023/06/19 23:57:59 checking machine... 2023/06/19 23:57:59 checking revisions... [ 155.993902] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:57:59 testing simple program... [ 156.036771] cgroup: Unknown subsys name 'net' [ 156.081560] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:56:26 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f805a91b000 CR3=000000000c666000 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=7b2592fed50803b49340e1afcc563ca6 XMM02=2c67c8bc2e329bc30000000000128508 XMM03=fb795ef6d6577056000000000012ccb0 XMM04=498e4e1589f610bb00000000000ae988 XMM05=19e9129bd510f235000000000013c730 XMM06=4fda316b135da52b000000000013c5b8 XMM07=e042d86d42eb936e000000000012cf30 XMM08=0bf6698338aa76950000000000128568 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff84506c7f RCX=ffffffff863b2301 RDX=1ffff1100d9e1355 RSI=0000000000000000 RDI=ffffffff84506c7f RBP=ffffffff84506c7f RSP=ffff88806cf099f8 R8 =ffffffff863b233c R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000008aa92 R12=ffff88806cf09b18 R13=0000000000000000 R14=ffff888017ec1b40 R15=ffff888019f4b300 RIP=ffffffff811fc6f7 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 00007ff7497c7900 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=00007fffffda2000 CR3=0000000014516000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000