syzkaller login: [ 61.467612] BUG: Bad rss-counter state mm:000000003f5fd2ba type:MM_FILEPAGES val:33 [ 61.468346] BUG: Bad rss-counter state mm:000000003f5fd2ba type:MM_ANONPAGES val:22 [ 61.576436] ================================================================== [ 61.577069] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.577732] Read of size 8 at addr ffff88800d8764e0 by task sshd/222 [ 61.578268] [ 61.578424] CPU: 0 PID: 222 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 61.579158] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.579842] Call Trace: [ 61.580067] [ 61.580268] dump_stack_lvl+0x91/0xf0 [ 61.580614] print_report+0xcc/0x620 [ 61.581059] ? __virt_addr_valid+0x102/0x340 [ 61.581454] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.581889] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.582319] kasan_report+0xbe/0xf0 [ 61.582665] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.583109] vma_interval_tree_remove+0xc75/0xec0 [ 61.583530] vma_prepare+0xc54/0x11a0 [ 61.583869] __split_vma+0x5af/0x950 [ 61.584202] ? __pfx___split_vma+0x10/0x10 [ 61.584573] ? find_held_lock+0x2c/0x110 [ 61.584944] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.585344] ? lock_is_held_type+0x9f/0x120 [ 61.585723] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.586151] ? mtree_range_walk+0x632/0x900 [ 61.586542] ? mas_walk+0x5c7/0x7c0 [ 61.586905] do_vmi_munmap+0x1f1/0x2b0 [ 61.587251] mmap_region+0x1f9/0x2660 [ 61.587531] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.587789] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.588145] ? __pfx_lock_acquire+0x10/0x10 [ 61.588413] ? __pfx_mmap_region+0x10/0x10 [ 61.588679] ? security_mmap_addr+0x7d/0xa0 [ 61.588945] ? get_unmapped_area+0x1f5/0x3f0 [ 61.589220] do_mmap+0x854/0xf00 [ 61.589440] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.589688] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.589970] ksys_mmap_pgoff+0x3af/0x500 [ 61.590224] do_syscall_64+0x3f/0x90 [ 61.590469] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.590799] RIP: 0033:0x7f06c8eb8d82 [ 61.591028] 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 [ 61.592081] RSP: 002b:00007ffe4eb3e148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.592535] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f06c8eb8d82 [ 61.592963] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f06c82f2000 [ 61.593391] RBP: 00007f06c82f2000 R08: 0000000000000009 R09: 0000000000001000 [ 61.593814] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bdf4334ec0 [ 61.594237] R13: 00007ffe4eb3e160 R14: 00007ffe4eb3e190 R15: 00007ffe4eb3e4f0 [ 61.594673] [ 61.594822] [ 61.594932] Allocated by task 215: [ 61.595151] kasan_save_stack+0x22/0x50 [ 61.595408] kasan_set_track+0x25/0x30 [ 61.595659] __kasan_slab_alloc+0x59/0x70 [ 61.595924] kmem_cache_alloc+0x16b/0x370 [ 61.596186] vm_area_dup+0x20/0x160 [ 61.596419] __split_vma+0x170/0x950 [ 61.596655] split_vma+0xc6/0x110 [ 61.596879] mprotect_fixup+0x8d2/0xb30 [ 61.597135] do_mprotect_pkey+0x87e/0xd40 [ 61.597399] __x64_sys_mprotect+0x78/0xc0 [ 61.597665] do_syscall_64+0x3f/0x90 [ 61.597908] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.598233] [ 61.598344] Freed by task 13: [ 61.598538] kasan_save_stack+0x22/0x50 [ 61.598808] kasan_set_track+0x25/0x30 [ 61.599061] kasan_save_free_info+0x2b/0x50 [ 61.599331] __kasan_slab_free+0x10a/0x190 [ 61.599601] kmem_cache_free+0x10d/0x4d0 [ 61.599857] rcu_core+0x8c8/0x2860 [ 61.600085] __do_softirq+0x1b7/0x7d4 [ 61.600327] [ 61.600435] Last potentially related work creation: [ 61.600729] kasan_save_stack+0x22/0x50 [ 61.600986] __kasan_record_aux_stack+0x8e/0xa0 [ 61.601275] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.601599] remove_vma+0x139/0x170 [ 61.601827] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.602109] do_vmi_munmap+0x1f1/0x2b0 [ 61.602353] __vm_munmap+0x138/0x3a0 [ 61.602601] __x64_sys_munmap+0x59/0x80 [ 61.602853] do_syscall_64+0x3f/0x90 [ 61.603092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.603414] [ 61.603524] The buggy address belongs to the object at ffff88800d876488 [ 61.603524] which belongs to the cache vm_area_struct of size 168 [ 61.604264] The buggy address is located 88 bytes inside of [ 61.604264] freed 168-byte region [ffff88800d876488, ffff88800d876530) [ 61.604968] [ 61.605077] The buggy address belongs to the physical page: [ 61.605408] page:00000000dfbd886d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd876 [ 61.605952] memcg:ffff888015fcc201 [ 61.606166] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.606491] page_type: 0xffffffff() [ 61.606724] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 61.607183] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015fcc201 [ 61.607637] page dumped because: kasan: bad access detected [ 61.607970] [ 61.608081] Memory state around the buggy address: [ 61.608371] ffff88800d876380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.608807] ffff88800d876400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 61.609351] >ffff88800d876480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.609899] ^ [ 61.610384] ffff88800d876500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 61.610901] ffff88800d876580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.611339] ================================================================== [ 61.611900] Disabling lock debugging due to kernel taint [ 64.054134] BUG: Bad rss-counter state mm:00000000c3d68e67 type:MM_FILEPAGES val:33 [ 64.055366] BUG: Bad rss-counter state mm:00000000c3d68e67 type:MM_ANONPAGES val:22 [ 64.560515] BUG: Bad rss-counter state mm:00000000e0c8e015 type:MM_FILEPAGES val:33 [ 64.561821] BUG: Bad rss-counter state mm:00000000e0c8e015 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65209' (ECDSA) to the list of known hosts. 2023/06/20 05:38:15 fuzzer started 2023/06/20 05:38:15 dialing manager at localhost:44161 2023/06/20 05:38:15 checking machine... 2023/06/20 05:38:15 checking revisions... [ 65.209860] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:38:15 testing simple program... [ 65.241908] cgroup: Unknown subsys name 'net' [ 65.292633] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:37:44 Registers: info registers vcpu 0 RAX=ffff88800c53f828 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff110018a7e96 RSI=ffffffff81837e4e RDI=ffff88800c53f468 RBP=ffff88800c53f4c0 RSP=ffff88800c53f3f8 R8 =0000000000000001 R9 =ffff88800c53f4a8 R10=0000000000038001 R11=000000000001d001 R12=ffff88800c53f530 R13=ffff88800c53f4b0 R14=ffff8880181d8000 R15=ffff88800c53f468 RIP=ffffffff81130664 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 00007f7296ae1900 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=00007f7297096650 CR3=000000001bd94000 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=00007f738a585320 CR3=000000000da72000 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=2034313a38333a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a38333a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000