syzkaller login: [ 32.800786] BUG: Bad rss-counter state mm:000000007d13a620 type:MM_FILEPAGES val:33 [ 32.801990] BUG: Bad rss-counter state mm:000000007d13a620 type:MM_ANONPAGES val:22 [ 32.838695] ================================================================== [ 32.839598] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.840525] Read of size 8 at addr ffff888016253c20 by task sshd/221 [ 32.841388] [ 32.841605] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.842469] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.843445] Call Trace: [ 32.843767] [ 32.844053] dump_stack_lvl+0x91/0xf0 [ 32.844544] print_report+0xcc/0x620 [ 32.845048] ? __virt_addr_valid+0x102/0x340 [ 32.845596] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.846226] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.846852] kasan_report+0xbe/0xf0 [ 32.847324] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.847947] vma_interval_tree_remove+0xc75/0xec0 [ 32.848546] vma_prepare+0xc54/0x11a0 [ 32.849037] __split_vma+0x5af/0x950 [ 32.849510] ? __pfx___split_vma+0x10/0x10 [ 32.850032] ? find_held_lock+0x2c/0x110 [ 32.850549] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.851120] ? lock_is_held_type+0x9f/0x120 [ 32.851654] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.852256] ? mtree_range_walk+0x632/0x900 [ 32.852798] ? mas_walk+0x5c7/0x7c0 [ 32.853260] do_vmi_munmap+0x1f1/0x2b0 [ 32.853737] mmap_region+0x1f9/0x2660 [ 32.854203] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.854703] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.855446] ? __pfx_lock_acquire+0x10/0x10 [ 32.856038] ? __pfx_mmap_region+0x10/0x10 [ 32.856720] ? security_mmap_addr+0x7d/0xa0 [ 32.857278] ? get_unmapped_area+0x1f5/0x3f0 [ 32.857841] do_mmap+0x854/0xf00 [ 32.858289] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.858791] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.859369] ksys_mmap_pgoff+0x3af/0x500 [ 32.859883] do_syscall_64+0x3f/0x90 [ 32.860368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.861108] RIP: 0033:0x7ff68596dd82 [ 32.861571] 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 [ 32.863748] RSP: 002b:00007ffe58398328 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.864665] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff68596dd82 [ 32.865483] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff684da7000 [ 32.866332] RBP: 00007ff684da7000 R08: 0000000000000009 R09: 0000000000001000 [ 32.867186] R10: 0000000000000812 R11: 0000000000000206 R12: 00005588048a4ec0 [ 32.868046] R13: 00007ffe58398340 R14: 00007ffe58398370 R15: 00007ffe583986d0 [ 32.868915] [ 32.869216] [ 32.869431] Allocated by task 214: [ 32.869867] kasan_save_stack+0x22/0x50 [ 32.870384] kasan_set_track+0x25/0x30 [ 32.870888] __kasan_slab_alloc+0x59/0x70 [ 32.871423] kmem_cache_alloc+0x16b/0x370 [ 32.871952] vm_area_dup+0x20/0x160 [ 32.872404] __split_vma+0x170/0x950 [ 32.872869] split_vma+0xc6/0x110 [ 32.873335] mprotect_fixup+0x8d2/0xb30 [ 32.873838] do_mprotect_pkey+0x87e/0xd40 [ 32.874354] __x64_sys_mprotect+0x78/0xc0 [ 32.874869] do_syscall_64+0x3f/0x90 [ 32.875339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.875977] [ 32.876192] Freed by task 214: [ 32.876580] kasan_save_stack+0x22/0x50 [ 32.877088] kasan_set_track+0x25/0x30 [ 32.877584] kasan_save_free_info+0x2b/0x50 [ 32.878115] __kasan_slab_free+0x10a/0x190 [ 32.878649] kmem_cache_free+0x10d/0x4d0 [ 32.879159] rcu_core+0x8c8/0x2860 [ 32.879603] __do_softirq+0x1b7/0x7d4 [ 32.880070] [ 32.880288] Last potentially related work creation: [ 32.880868] kasan_save_stack+0x22/0x50 [ 32.881379] __kasan_record_aux_stack+0x8e/0xa0 [ 32.881955] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.882594] remove_vma+0x139/0x170 [ 32.883046] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.883607] do_vmi_munmap+0x1f1/0x2b0 [ 32.884089] __vm_munmap+0x138/0x3a0 [ 32.884554] __x64_sys_munmap+0x59/0x80 [ 32.885065] do_syscall_64+0x3f/0x90 [ 32.885538] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.886183] [ 32.886399] The buggy address belongs to the object at ffff888016253bc8 [ 32.886399] which belongs to the cache vm_area_struct of size 168 [ 32.887850] The buggy address is located 88 bytes inside of [ 32.887850] freed 168-byte region [ffff888016253bc8, ffff888016253c70) [ 32.889254] [ 32.889475] The buggy address belongs to the physical page: [ 32.890129] page:00000000f25cde5b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16253 [ 32.891222] memcg:ffff88800efffc01 [ 32.891648] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.892288] page_type: 0xffffffff() [ 32.892736] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.893664] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800efffc01 [ 32.894579] page dumped because: kasan: bad access detected [ 32.895237] [ 32.895454] Memory state around the buggy address: [ 32.896027] ffff888016253b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.896877] ffff888016253b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.897735] >ffff888016253c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.898576] ^ [ 32.899110] ffff888016253c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.899967] ffff888016253d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.900821] ================================================================== [ 32.901882] Disabling lock debugging due to kernel taint [ 34.677925] BUG: Bad rss-counter state mm:000000003d21bb47 type:MM_FILEPAGES val:33 [ 34.678832] BUG: Bad rss-counter state mm:000000003d21bb47 type:MM_ANONPAGES val:22 [ 35.035519] BUG: Bad rss-counter state mm:00000000ced0d16c type:MM_FILEPAGES val:33 [ 35.036179] BUG: Bad rss-counter state mm:00000000ced0d16c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60709' (ECDSA) to the list of known hosts. 2023/06/19 12:58:14 fuzzer started 2023/06/19 12:58:14 dialing manager at localhost:44161 2023/06/19 12:58:14 checking machine... 2023/06/19 12:58:14 checking revisions... [ 35.614027] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:58:14 testing simple program... [ 35.662986] cgroup: Unknown subsys name 'net' [ 35.708310] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:58:11 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8171108a RDX=ffff888015af3680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff8880169efd90 RSP=ffff8880169efbf8 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000001 R11=0000000000000000 R12=ffffea00006a74c0 R13=ffff88800eed5658 R14=ffff8880169efdb8 R15=ffffea00006a74f4 RIP=ffffffff814c01fc 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f72a4ca3900 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=000055e9128a2744 CR3=000000000d8e8000 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=0000000000000000000055e912399060 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fa0038d1000 CR3=000000000c604000 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=2b69fe183cf20bb1be46b6f4cedbfba8 XMM02=ec2efd57dc4c00df000000000011dc28 XMM03=95886938117da464000000000011dcf8 XMM04=488723d37ff6994b00000000000ae988 XMM05=e4cb8bb95a7664b60000000000134d00 XMM06=c291bd5c70af25b90000000000134b88 XMM07=e042d86d42eb936e0000000000125390 XMM08=95886938117da464000000000011dcf8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000