syzkaller login: [ 71.777093] BUG: Bad rss-counter state mm:00000000e970f159 type:MM_FILEPAGES val:33 [ 71.778262] BUG: Bad rss-counter state mm:00000000e970f159 type:MM_ANONPAGES val:22 [ 71.814893] ================================================================== [ 71.815998] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 71.816936] Read of size 8 at addr ffff88800f335d08 by task sshd/230 [ 71.817912] [ 71.818134] CPU: 1 PID: 230 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 71.819114] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 71.820217] Call Trace: [ 71.820635] [ 71.820927] dump_stack_lvl+0x91/0xf0 [ 71.821534] print_report+0xcc/0x620 [ 71.822104] ? __virt_addr_valid+0x102/0x340 [ 71.822747] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.823381] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.824017] kasan_report+0xbe/0xf0 [ 71.824500] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.825396] vma_interval_tree_remove+0xc75/0xec0 [ 71.826006] vma_prepare+0xc54/0x11a0 [ 71.826498] __split_vma+0x5af/0x950 [ 71.826975] ? __pfx___split_vma+0x10/0x10 [ 71.827531] ? find_held_lock+0x2c/0x110 [ 71.828066] do_vmi_align_munmap+0x2ba/0x11f0 [ 71.828639] ? lock_is_held_type+0x9f/0x120 [ 71.829186] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 71.829816] ? mtree_range_walk+0x632/0x900 [ 71.830364] ? mas_walk+0x5c7/0x7c0 [ 71.830839] do_vmi_munmap+0x1f1/0x2b0 [ 71.831345] mmap_region+0x1f9/0x2660 [ 71.831844] ? vm_mmap_pgoff+0x15c/0x3a0 [ 71.832364] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 71.833077] ? __pfx_lock_acquire+0x10/0x10 [ 71.833638] ? __pfx_mmap_region+0x10/0x10 [ 71.834179] ? security_mmap_addr+0x7d/0xa0 [ 71.834715] ? get_unmapped_area+0x1f5/0x3f0 [ 71.835280] do_mmap+0x854/0xf00 [ 71.835731] vm_mmap_pgoff+0x1a6/0x3a0 [ 71.836245] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 71.836832] ksys_mmap_pgoff+0x3af/0x500 [ 71.837368] do_syscall_64+0x3f/0x90 [ 71.837849] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.838499] RIP: 0033:0x7ffa6be19d82 [ 71.838956] 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 [ 71.841121] RSP: 002b:00007ffe53815648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 71.842049] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffa6be19d82 [ 71.842919] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffa6b253000 [ 71.843784] RBP: 00007ffa6b253000 R08: 0000000000000009 R09: 0000000000001000 [ 71.844635] R10: 0000000000000812 R11: 0000000000000206 R12: 000056226bc53ec0 [ 71.845515] R13: 00007ffe53815660 R14: 00007ffe53815690 R15: 00007ffe538159f0 [ 71.846385] [ 71.846685] [ 71.846907] Allocated by task 223: [ 71.847335] kasan_save_stack+0x22/0x50 [ 71.847846] kasan_set_track+0x25/0x30 [ 71.848348] __kasan_slab_alloc+0x59/0x70 [ 71.848873] kmem_cache_alloc+0x16b/0x370 [ 71.849400] vm_area_dup+0x20/0x160 [ 71.849854] __split_vma+0x170/0x950 [ 71.850327] split_vma+0xc6/0x110 [ 71.850771] mprotect_fixup+0x8d2/0xb30 [ 71.851273] do_mprotect_pkey+0x87e/0xd40 [ 71.851793] __x64_sys_mprotect+0x78/0xc0 [ 71.852316] do_syscall_64+0x3f/0x90 [ 71.852797] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.853464] [ 71.853679] Freed by task 223: [ 71.854068] kasan_save_stack+0x22/0x50 [ 71.854578] kasan_set_track+0x25/0x30 [ 71.855076] kasan_save_free_info+0x2b/0x50 [ 71.855608] __kasan_slab_free+0x10a/0x190 [ 71.856138] kmem_cache_free+0x10d/0x4d0 [ 71.856646] rcu_core+0x8c8/0x2860 [ 71.857095] __do_softirq+0x1b7/0x7d4 [ 71.857574] [ 71.857789] Last potentially related work creation: [ 71.858373] kasan_save_stack+0x22/0x50 [ 71.858879] __kasan_record_aux_stack+0x8e/0xa0 [ 71.859455] __call_rcu_common.constprop.0+0x6a/0xb90 [ 71.860099] remove_vma+0x139/0x170 [ 71.860552] do_vmi_align_munmap+0xd4a/0x11f0 [ 71.861114] do_vmi_munmap+0x1f1/0x2b0 [ 71.861622] __vm_munmap+0x138/0x3a0 [ 71.862089] __x64_sys_munmap+0x59/0x80 [ 71.862581] do_syscall_64+0x3f/0x90 [ 71.863058] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.863702] [ 71.863916] The buggy address belongs to the object at ffff88800f335cb0 [ 71.863916] which belongs to the cache vm_area_struct of size 168 [ 71.865402] The buggy address is located 88 bytes inside of [ 71.865402] freed 168-byte region [ffff88800f335cb0, ffff88800f335d58) [ 71.866803] [ 71.867019] The buggy address belongs to the physical page: [ 71.867683] page:00000000f3933727 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf335 [ 71.868768] memcg:ffff888015e1e801 [ 71.869199] flags: 0x100000000000200(slab|node=0|zone=1) [ 71.869862] page_type: 0xffffffff() [ 71.870315] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 71.871228] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015e1e801 [ 71.872135] page dumped because: kasan: bad access detected [ 71.872797] [ 71.873011] Memory state around the buggy address: [ 71.873604] ffff88800f335c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 71.874469] ffff88800f335c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 71.875332] >ffff88800f335d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 71.876194] ^ [ 71.876635] ffff88800f335d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 71.877493] ffff88800f335e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 71.878357] ================================================================== [ 71.879648] Disabling lock debugging due to kernel taint [ 74.166776] BUG: Bad rss-counter state mm:00000000fcb9326e type:MM_FILEPAGES val:33 [ 74.167756] BUG: Bad rss-counter state mm:00000000fcb9326e type:MM_ANONPAGES val:22 [ 74.616761] BUG: Bad rss-counter state mm:000000008b61b2ed type:MM_FILEPAGES val:33 [ 74.617769] BUG: Bad rss-counter state mm:000000008b61b2ed type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26996' (ECDSA) to the list of known hosts. 2023/06/19 14:45:44 fuzzer started 2023/06/19 14:45:44 dialing manager at localhost:44161 2023/06/19 14:45:44 checking machine... 2023/06/19 14:45:44 checking revisions... [ 75.342237] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:45:44 testing simple program... [ 75.395061] cgroup: Unknown subsys name 'net' [ 75.436804] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:45:40 Registers: info registers vcpu 0 RAX=0100000000000200 RBX=0000000000092cc0 RCX=ffffffff818470dc RDX=00000000ffffffff RSI=00000000ffffffff RDI=ffff88800844f780 RBP=ffff888017e4f9c0 RSP=ffff888017e4f900 R8 =ffff88806ce3de00 R9 =00000000000000f0 R10=ffff888017e4f9e0 R11=00000000000b6996 R12=ffff88800844f780 R13=0000000000000000 R14=0000000000000000 R15=ffff88806ce3de00 RIP=ffffffff81806c43 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5011193900 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=00007ffccda8d000 CR3=000000000c9ae000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=ffff88806cf361a0 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff81839a7d RBP=ffff88806cf361c8 RSP=ffff88806cf09dc8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff88807ffdc000 R13=0000000000000005 R14=00000000fffffe80 R15=0000000000000000 RIP=ffffffff8450b935 RFL=00000046 [---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 =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=00007f5f968c49f0 CR3=000000000dd44000 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=2033343a35343a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3034 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3034325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a35343a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000