syzkaller login: [ 45.383412] BUG: Bad rss-counter state mm:000000003b191524 type:MM_FILEPAGES val:33 [ 45.384226] BUG: Bad rss-counter state mm:000000003b191524 type:MM_ANONPAGES val:22 [ 45.535451] ================================================================== [ 45.536260] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.537101] Read of size 8 at addr ffff888019ad5d08 by task sshd/220 [ 45.537767] [ 45.537961] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.538714] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.539835] Call Trace: [ 45.540116] [ 45.540357] dump_stack_lvl+0x91/0xf0 [ 45.540789] print_report+0xcc/0x620 [ 45.541213] ? __virt_addr_valid+0x102/0x340 [ 45.541695] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.542230] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.542788] kasan_report+0xbe/0xf0 [ 45.543209] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.543748] vma_interval_tree_remove+0xc75/0xec0 [ 45.544284] vma_prepare+0xc54/0x11a0 [ 45.544706] __split_vma+0x5af/0x950 [ 45.545140] ? __pfx___split_vma+0x10/0x10 [ 45.545603] ? find_held_lock+0x2c/0x110 [ 45.546066] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.546578] ? lock_is_held_type+0x9f/0x120 [ 45.547066] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.547599] ? mtree_range_walk+0x632/0x900 [ 45.548085] ? mas_walk+0x5c7/0x7c0 [ 45.548488] do_vmi_munmap+0x1f1/0x2b0 [ 45.548925] mmap_region+0x1f9/0x2660 [ 45.549349] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.549809] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.550445] ? __pfx_lock_acquire+0x10/0x10 [ 45.550943] ? __pfx_mmap_region+0x10/0x10 [ 45.551407] ? security_mmap_addr+0x7d/0xa0 [ 45.551892] ? get_unmapped_area+0x1f5/0x3f0 [ 45.552382] do_mmap+0x854/0xf00 [ 45.552772] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.553215] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.553704] ksys_mmap_pgoff+0x3af/0x500 [ 45.554154] do_syscall_64+0x3f/0x90 [ 45.554585] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.555165] RIP: 0033:0x7fd11c209d82 [ 45.555557] 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 [ 45.557427] RSP: 002b:00007ffd2d6f1568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.558231] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd11c209d82 [ 45.559001] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd11b643000 [ 45.559742] RBP: 00007fd11b643000 R08: 0000000000000009 R09: 0000000000001000 [ 45.560494] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b31e289ec0 [ 45.561257] R13: 00007ffd2d6f1580 R14: 00007ffd2d6f15b0 R15: 00007ffd2d6f1910 [ 45.562035] [ 45.562288] [ 45.562477] Allocated by task 213: [ 45.562875] kasan_save_stack+0x22/0x50 [ 45.563322] kasan_set_track+0x25/0x30 [ 45.563751] __kasan_slab_alloc+0x59/0x70 [ 45.564220] kmem_cache_alloc+0x16b/0x370 [ 45.564678] vm_area_dup+0x20/0x160 [ 45.565085] __split_vma+0x170/0x950 [ 45.565494] split_vma+0xc6/0x110 [ 45.565900] mprotect_fixup+0x8d2/0xb30 [ 45.566339] do_mprotect_pkey+0x87e/0xd40 [ 45.566834] __x64_sys_mprotect+0x78/0xc0 [ 45.567295] do_syscall_64+0x3f/0x90 [ 45.567703] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.568273] [ 45.568461] Freed by task 203: [ 45.568821] kasan_save_stack+0x22/0x50 [ 45.569262] kasan_set_track+0x25/0x30 [ 45.569703] kasan_save_free_info+0x2b/0x50 [ 45.570186] __kasan_slab_free+0x10a/0x190 [ 45.570658] kmem_cache_free+0x10d/0x4d0 [ 45.571109] rcu_core+0x8c8/0x2860 [ 45.571501] __do_softirq+0x1b7/0x7d4 [ 45.571934] [ 45.572127] Last potentially related work creation: [ 45.572646] kasan_save_stack+0x22/0x50 [ 45.573100] __kasan_record_aux_stack+0x8e/0xa0 [ 45.573605] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.574192] remove_vma+0x139/0x170 [ 45.574602] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.575104] do_vmi_munmap+0x1f1/0x2b0 [ 45.575526] __vm_munmap+0x138/0x3a0 [ 45.575946] __x64_sys_munmap+0x59/0x80 [ 45.576382] do_syscall_64+0x3f/0x90 [ 45.576800] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.577363] [ 45.577552] The buggy address belongs to the object at ffff888019ad5cb0 [ 45.577552] which belongs to the cache vm_area_struct of size 168 [ 45.578885] The buggy address is located 88 bytes inside of [ 45.578885] freed 168-byte region [ffff888019ad5cb0, ffff888019ad5d58) [ 45.580259] [ 45.580457] The buggy address belongs to the physical page: [ 45.581051] page:0000000010d8598a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ad5 [ 45.582023] memcg:ffff88800dcd4701 [ 45.582391] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.582986] page_type: 0xffffffff() [ 45.583382] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 45.584206] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcd4701 [ 45.585001] page dumped because: kasan: bad access detected [ 45.585584] [ 45.585776] Memory state around the buggy address: [ 45.586298] ffff888019ad5c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 45.587091] ffff888019ad5c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 45.587841] >ffff888019ad5d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 45.588598] ^ [ 45.589002] ffff888019ad5d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 45.589752] ffff888019ad5e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 45.590510] ================================================================== [ 45.591327] Disabling lock debugging due to kernel taint [ 47.659633] BUG: Bad rss-counter state mm:0000000092718c78 type:MM_FILEPAGES val:33 [ 47.660576] BUG: Bad rss-counter state mm:0000000092718c78 type:MM_ANONPAGES val:22 [ 48.178058] BUG: Bad rss-counter state mm:0000000007834416 type:MM_FILEPAGES val:33 [ 48.179133] BUG: Bad rss-counter state mm:0000000007834416 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19682' (ECDSA) to the list of known hosts. 2023/06/20 03:25:02 fuzzer started 2023/06/20 03:25:02 dialing manager at localhost:44161 2023/06/20 03:25:02 checking machine... 2023/06/20 03:25:02 checking revisions... [ 48.912755] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:25:03 testing simple program... [ 48.966678] cgroup: Unknown subsys name 'net' [ 49.035017] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:24:48 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800c5032b8 RCX=ffffffff818e39e2 RDX=ffff888015a39b40 RSI=0000000000000000 RDI=0000000000000006 RBP=ffff88800fe1f938 RSP=ffff88800fe1f900 R8 =0000000000000006 R9 =0000000064911bfc R10=0000000064911c01 R11=0000000000000001 R12=0000000064911bfc R13=0000000064911c01 R14=0000000064911c0e R15=0000000015202d02 RIP=ffffffff814c07e0 RFL=00000283 [--S---C] 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 00007fca70b72900 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=00007fca71127650 CR3=000000000eb40000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00005556b8fe2000 CR3=000000000eabe000 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=2032303a35323a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a35323a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000