syzkaller login: [ 39.004007] BUG: Bad rss-counter state mm:00000000a0ca33d0 type:MM_FILEPAGES val:33 [ 39.005257] BUG: Bad rss-counter state mm:00000000a0ca33d0 type:MM_ANONPAGES val:22 [ 39.273656] ================================================================== [ 39.274698] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.275762] Read of size 8 at addr ffff88800e032140 by task sshd/219 [ 39.276752] [ 39.276995] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.277966] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.279120] Call Trace: [ 39.279491] [ 39.279822] dump_stack_lvl+0x91/0xf0 [ 39.280386] print_report+0xcc/0x620 [ 39.280941] ? __virt_addr_valid+0x102/0x340 [ 39.281545] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.282230] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.282909] kasan_report+0xbe/0xf0 [ 39.283424] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.284058] vma_interval_tree_remove+0xc75/0xec0 [ 39.284674] vma_prepare+0xc54/0x11a0 [ 39.285165] __split_vma+0x5af/0x950 [ 39.285639] ? __pfx___split_vma+0x10/0x10 [ 39.286195] ? find_held_lock+0x2c/0x110 [ 39.286752] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.287360] ? lock_is_held_type+0x9f/0x120 [ 39.287947] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.288590] ? mtree_range_walk+0x632/0x900 [ 39.289186] ? mas_walk+0x5c7/0x7c0 [ 39.289690] do_vmi_munmap+0x1f1/0x2b0 [ 39.290215] mmap_region+0x1f9/0x2660 [ 39.290726] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.291286] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.292044] ? __pfx_lock_acquire+0x10/0x10 [ 39.292621] ? __pfx_mmap_region+0x10/0x10 [ 39.293199] ? security_mmap_addr+0x7d/0xa0 [ 39.293776] ? get_unmapped_area+0x1f5/0x3f0 [ 39.294369] do_mmap+0x854/0xf00 [ 39.294868] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.295463] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.296172] ksys_mmap_pgoff+0x3af/0x500 [ 39.296797] do_syscall_64+0x3f/0x90 [ 39.297385] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.298179] RIP: 0033:0x7f87cebf7d82 [ 39.298739] 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 [ 39.301233] RSP: 002b:00007ffe2630b988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.302279] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f87cebf7d82 [ 39.303255] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f87ce031000 [ 39.304189] RBP: 00007f87ce031000 R08: 0000000000000009 R09: 0000000000001000 [ 39.305147] R10: 0000000000000812 R11: 0000000000000206 R12: 00005565771caec0 [ 39.306093] R13: 00007ffe2630b9a0 R14: 00007ffe2630b9d0 R15: 00007ffe2630bd30 [ 39.307069] [ 39.307399] [ 39.307642] Allocated by task 212: [ 39.308128] kasan_save_stack+0x22/0x50 [ 39.308700] kasan_set_track+0x25/0x30 [ 39.309245] __kasan_slab_alloc+0x59/0x70 [ 39.309828] kmem_cache_alloc+0x16b/0x370 [ 39.310382] vm_area_dup+0x20/0x160 [ 39.310899] __split_vma+0x170/0x950 [ 39.311405] split_vma+0xc6/0x110 [ 39.311879] mprotect_fixup+0x8d2/0xb30 [ 39.312428] do_mprotect_pkey+0x87e/0xd40 [ 39.312998] __x64_sys_mprotect+0x78/0xc0 [ 39.313580] do_syscall_64+0x3f/0x90 [ 39.314098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.314815] [ 39.315050] Freed by task 212: [ 39.315494] kasan_save_stack+0x22/0x50 [ 39.316051] kasan_set_track+0x25/0x30 [ 39.316597] kasan_save_free_info+0x2b/0x50 [ 39.317178] __kasan_slab_free+0x10a/0x190 [ 39.317769] kmem_cache_free+0x10d/0x4d0 [ 39.318393] rcu_core+0x8c8/0x2860 [ 39.318899] __do_softirq+0x1b7/0x7d4 [ 39.319432] [ 39.319662] Last potentially related work creation: [ 39.320309] kasan_save_stack+0x22/0x50 [ 39.320845] __kasan_record_aux_stack+0x8e/0xa0 [ 39.321479] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.322186] remove_vma+0x139/0x170 [ 39.322679] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.323344] do_vmi_munmap+0x1f1/0x2b0 [ 39.323879] __vm_munmap+0x138/0x3a0 [ 39.324390] __x64_sys_munmap+0x59/0x80 [ 39.324922] do_syscall_64+0x3f/0x90 [ 39.325441] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.326128] [ 39.326360] Second to last potentially related work creation: [ 39.327119] kasan_save_stack+0x22/0x50 [ 39.327663] __kasan_record_aux_stack+0x8e/0xa0 [ 39.328297] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.328990] remove_vma+0x139/0x170 [ 39.329503] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.330112] do_vmi_munmap+0x1f1/0x2b0 [ 39.330642] mmap_region+0x1f9/0x2660 [ 39.331180] do_mmap+0x854/0xf00 [ 39.331638] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.332180] ksys_mmap_pgoff+0x3af/0x500 [ 39.332748] do_syscall_64+0x3f/0x90 [ 39.333279] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.334015] [ 39.334265] The buggy address belongs to the object at ffff88800e0320e8 [ 39.334265] which belongs to the cache vm_area_struct of size 168 [ 39.335942] The buggy address is located 88 bytes inside of [ 39.335942] freed 168-byte region [ffff88800e0320e8, ffff88800e032190) [ 39.337517] [ 39.337751] The buggy address belongs to the physical page: [ 39.338456] page:00000000fcc05dd2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe032 [ 39.339626] memcg:ffff88800e15a501 [ 39.340089] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.340839] page_type: 0xffffffff() [ 39.341321] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 39.342358] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e15a501 [ 39.343369] page dumped because: kasan: bad access detected [ 39.344078] [ 39.344312] Memory state around the buggy address: [ 39.344933] ffff88800e032000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.345863] ffff88800e032080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 39.346799] >ffff88800e032100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.347710] ^ [ 39.348392] ffff88800e032180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 39.349313] ffff88800e032200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.350234] ================================================================== [ 39.351395] Disabling lock debugging due to kernel taint [ 41.516231] BUG: Bad rss-counter state mm:00000000704acb2b type:MM_FILEPAGES val:33 [ 41.517229] BUG: Bad rss-counter state mm:00000000704acb2b type:MM_ANONPAGES val:22 [ 41.999478] BUG: Bad rss-counter state mm:000000001c59c13e type:MM_FILEPAGES val:33 [ 42.000474] BUG: Bad rss-counter state mm:000000001c59c13e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50904' (ECDSA) to the list of known hosts. 2023/06/21 06:33:48 fuzzer started 2023/06/21 06:33:48 dialing manager at localhost:36067 2023/06/21 06:33:48 checking machine... 2023/06/21 06:33:48 checking revisions... [ 42.708399] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:33:49 testing simple program... [ 42.762512] cgroup: Unknown subsys name 'net' [ 42.823360] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:33:48 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=00007ffd94b4c7e8 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=00007f8ed4ab9510000055bddd1e4790 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=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff864bce01 RDX=1ffff1100d9e135e RSI=ffffffff81835615 RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =ffffffff864bce30 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b6d7d R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888016753680 R15=ffff888015ba9c60 RIP=ffffffff813ad47e 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 00007fc5fdcea900 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=00007fc5fe2a1618 CR3=000000000eb10000 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