syzkaller login: [ 30.295824] BUG: Bad rss-counter state mm:00000000e11a2ad8 type:MM_FILEPAGES val:33 [ 30.297047] BUG: Bad rss-counter state mm:00000000e11a2ad8 type:MM_ANONPAGES val:22 [ 30.337271] ================================================================== [ 30.338282] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.339420] Read of size 8 at addr ffff88800ef12df0 by task sshd/220 [ 30.340258] [ 30.340465] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.341473] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.342465] Call Trace: [ 30.342767] [ 30.343098] dump_stack_lvl+0x91/0xf0 [ 30.343623] print_report+0xcc/0x620 [ 30.344081] ? __virt_addr_valid+0x102/0x340 [ 30.344616] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.345202] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.345796] kasan_report+0xbe/0xf0 [ 30.346252] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.346836] vma_interval_tree_remove+0xc75/0xec0 [ 30.347403] vma_prepare+0xc54/0x11a0 [ 30.347885] __split_vma+0x5af/0x950 [ 30.348348] ? __pfx___split_vma+0x10/0x10 [ 30.348875] ? find_held_lock+0x2c/0x110 [ 30.349394] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.349958] ? lock_is_held_type+0x9f/0x120 [ 30.350497] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.351103] ? mtree_range_walk+0x632/0x900 [ 30.351658] ? mas_walk+0x5c7/0x7c0 [ 30.352132] do_vmi_munmap+0x1f1/0x2b0 [ 30.352629] mmap_region+0x1f9/0x2660 [ 30.353108] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.353606] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.354311] ? __pfx_lock_acquire+0x10/0x10 [ 30.354846] ? __pfx_mmap_region+0x10/0x10 [ 30.355383] ? security_mmap_addr+0x7d/0xa0 [ 30.355913] ? get_unmapped_area+0x1f5/0x3f0 [ 30.356462] do_mmap+0x854/0xf00 [ 30.356917] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.357415] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.357982] ksys_mmap_pgoff+0x3af/0x500 [ 30.358495] do_syscall_64+0x3f/0x90 [ 30.358982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.359627] RIP: 0033:0x7efe673ced82 [ 30.360085] 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 [ 30.362257] RSP: 002b:00007ffd18570058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.363182] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efe673ced82 [ 30.364040] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efe66808000 [ 30.364914] RBP: 00007efe66808000 R08: 0000000000000009 R09: 0000000000001000 [ 30.365780] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557a8ca47b20 [ 30.366646] R13: 00007ffd18570070 R14: 00007ffd185700a0 R15: 00007ffd18570400 [ 30.367515] [ 30.367811] [ 30.368027] Allocated by task 213: [ 30.368464] kasan_save_stack+0x22/0x50 [ 30.368974] kasan_set_track+0x25/0x30 [ 30.369470] __kasan_slab_alloc+0x59/0x70 [ 30.369998] kmem_cache_alloc+0x16b/0x370 [ 30.370527] vm_area_dup+0x20/0x160 [ 30.370986] __split_vma+0x170/0x950 [ 30.371450] split_vma+0xc6/0x110 [ 30.371891] mprotect_fixup+0x8d2/0xb30 [ 30.372402] do_mprotect_pkey+0x87e/0xd40 [ 30.372946] __x64_sys_mprotect+0x78/0xc0 [ 30.373470] do_syscall_64+0x3f/0x90 [ 30.373943] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.374584] [ 30.374809] Freed by task 203: [ 30.375207] kasan_save_stack+0x22/0x50 [ 30.375720] kasan_set_track+0x25/0x30 [ 30.376206] kasan_save_free_info+0x2b/0x50 [ 30.376750] __kasan_slab_free+0x10a/0x190 [ 30.377289] kmem_cache_free+0x10d/0x4d0 [ 30.377793] rcu_core+0x8c8/0x2860 [ 30.378241] __do_softirq+0x1b7/0x7d4 [ 30.378725] [ 30.378936] Last potentially related work creation: [ 30.379529] kasan_save_stack+0x22/0x50 [ 30.380028] __kasan_record_aux_stack+0x8e/0xa0 [ 30.380627] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.381274] remove_vma+0x139/0x170 [ 30.381735] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.382363] do_vmi_munmap+0x1f1/0x2b0 [ 30.382862] __vm_munmap+0x138/0x3a0 [ 30.383331] __x64_sys_munmap+0x59/0x80 [ 30.383830] do_syscall_64+0x3f/0x90 [ 30.384316] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.384967] [ 30.385183] The buggy address belongs to the object at ffff88800ef12d98 [ 30.385183] which belongs to the cache vm_area_struct of size 168 [ 30.386680] The buggy address is located 88 bytes inside of [ 30.386680] freed 168-byte region [ffff88800ef12d98, ffff88800ef12e40) [ 30.388116] [ 30.388335] The buggy address belongs to the physical page: [ 30.388979] page:000000006d109d5d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef12 [ 30.389999] memcg:ffff88800eeacc01 [ 30.390402] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.391008] page_type: 0xffffffff() [ 30.391437] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.392306] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eeacc01 [ 30.393182] page dumped because: kasan: bad access detected [ 30.393802] [ 30.394010] Memory state around the buggy address: [ 30.394560] ffff88800ef12c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.395371] ffff88800ef12d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.396184] >ffff88800ef12d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.397006] ^ [ 30.397849] ffff88800ef12e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.398861] ffff88800ef12e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.399863] ================================================================== [ 30.400986] Disabling lock debugging due to kernel taint [ 33.204295] BUG: Bad rss-counter state mm:00000000e7d1193a type:MM_FILEPAGES val:33 [ 33.205519] BUG: Bad rss-counter state mm:00000000e7d1193a type:MM_ANONPAGES val:22 [ 33.595686] BUG: Bad rss-counter state mm:00000000df5e3dee type:MM_FILEPAGES val:33 [ 33.597108] BUG: Bad rss-counter state mm:00000000df5e3dee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20884' (ECDSA) to the list of known hosts. 2023/06/20 14:22:27 fuzzer started 2023/06/20 14:22:27 dialing manager at localhost:36067 2023/06/20 14:22:27 checking machine... 2023/06/20 14:22:27 checking revisions... [ 34.269519] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:22:27 testing simple program... [ 34.307862] cgroup: Unknown subsys name 'net' [ 34.347119] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:22:27 Registers: info registers vcpu 0 RAX=ffffffff813782f8 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff813782f8 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88801000bec0 RIP=ffffffff84538440 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 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=00007f1468f4b650 CR3=0000000010390000 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=32323a3431203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732037323a3232 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383430 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800c5af418 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff88800c5af470 RSP=ffff88800c5af400 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800c5af4e0 R13=0000000000000000 R14=ffff88801640b680 R15=0000000000000000 RIP=ffffffff81130399 RFL=00000207 [-----PC] 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 00007f1468996900 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=00007f1468f4d618 CR3=000000000cbb6000 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