syzkaller login: [ 34.350916] BUG: Bad rss-counter state mm:0000000056d45fa9 type:MM_FILEPAGES val:33 [ 34.352759] BUG: Bad rss-counter state mm:0000000056d45fa9 type:MM_ANONPAGES val:22 [ 34.508105] ================================================================== [ 34.509074] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.510065] Read of size 8 at addr ffff8880146e05c8 by task sshd/220 [ 34.510861] [ 34.511094] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.512137] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.513141] Call Trace: [ 34.513466] [ 34.513887] dump_stack_lvl+0x91/0xf0 [ 34.514508] print_report+0xcc/0x620 [ 34.515098] ? __virt_addr_valid+0x102/0x340 [ 34.515770] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.516515] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.517262] kasan_report+0xbe/0xf0 [ 34.517846] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.518614] vma_interval_tree_remove+0xc75/0xec0 [ 34.519347] vma_prepare+0xc54/0x11a0 [ 34.519932] __split_vma+0x5af/0x950 [ 34.520507] ? __pfx___split_vma+0x10/0x10 [ 34.521158] ? find_held_lock+0x2c/0x110 [ 34.521796] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.522513] ? lock_is_held_type+0x9f/0x120 [ 34.523113] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.523754] ? mtree_range_walk+0x632/0x900 [ 34.524325] ? mas_walk+0x5c7/0x7c0 [ 34.524812] do_vmi_munmap+0x1f1/0x2b0 [ 34.525327] mmap_region+0x1f9/0x2660 [ 34.525831] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.526375] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.527122] ? __pfx_lock_acquire+0x10/0x10 [ 34.527675] ? __pfx_mmap_region+0x10/0x10 [ 34.528234] ? security_mmap_addr+0x7d/0xa0 [ 34.528783] ? get_unmapped_area+0x1f5/0x3f0 [ 34.529353] do_mmap+0x854/0xf00 [ 34.529814] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.530336] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.530923] ksys_mmap_pgoff+0x3af/0x500 [ 34.531450] do_syscall_64+0x3f/0x90 [ 34.531944] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.532618] RIP: 0033:0x7f5fa5c62d82 [ 34.533104] 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 [ 34.535339] RSP: 002b:00007ffd3a6ade78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.536278] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5fa5c62d82 [ 34.537163] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5fa509c000 [ 34.538056] RBP: 00007f5fa509c000 R08: 0000000000000009 R09: 0000000000001000 [ 34.538939] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b342e08d90 [ 34.539825] R13: 00007ffd3a6ade90 R14: 00007ffd3a6adec0 R15: 00007ffd3a6ae220 [ 34.540713] [ 34.541018] [ 34.541237] Allocated by task 213: [ 34.541680] kasan_save_stack+0x22/0x50 [ 34.542225] kasan_set_track+0x25/0x30 [ 34.542740] __kasan_slab_alloc+0x59/0x70 [ 34.543280] kmem_cache_alloc+0x16b/0x370 [ 34.543823] vm_area_dup+0x20/0x160 [ 34.544296] __split_vma+0x170/0x950 [ 34.544785] split_vma+0xc6/0x110 [ 34.545233] mprotect_fixup+0x8d2/0xb30 [ 34.545752] do_mprotect_pkey+0x87e/0xd40 [ 34.546297] __x64_sys_mprotect+0x78/0xc0 [ 34.546816] do_syscall_64+0x3f/0x90 [ 34.547294] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.547947] [ 34.548158] Freed by task 213: [ 34.548555] kasan_save_stack+0x22/0x50 [ 34.549068] kasan_set_track+0x25/0x30 [ 34.549560] kasan_save_free_info+0x2b/0x50 [ 34.550118] __kasan_slab_free+0x10a/0x190 [ 34.550654] kmem_cache_free+0x10d/0x4d0 [ 34.551171] rcu_core+0x8c8/0x2860 [ 34.551621] __do_softirq+0x1b7/0x7d4 [ 34.552105] [ 34.552320] Last potentially related work creation: [ 34.552905] kasan_save_stack+0x22/0x50 [ 34.553412] __kasan_record_aux_stack+0x8e/0xa0 [ 34.553997] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.554642] remove_vma+0x139/0x170 [ 34.555109] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.555662] do_vmi_munmap+0x1f1/0x2b0 [ 34.556168] __vm_munmap+0x138/0x3a0 [ 34.556635] __x64_sys_munmap+0x59/0x80 [ 34.557134] do_syscall_64+0x3f/0x90 [ 34.557607] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.558264] [ 34.558479] The buggy address belongs to the object at ffff8880146e0570 [ 34.558479] which belongs to the cache vm_area_struct of size 168 [ 34.559950] The buggy address is located 88 bytes inside of [ 34.559950] freed 168-byte region [ffff8880146e0570, ffff8880146e0618) [ 34.561352] [ 34.561569] The buggy address belongs to the physical page: [ 34.562253] page:00000000765d6d81 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x146e0 [ 34.563347] memcg:ffff888016b5b901 [ 34.563775] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.564428] page_type: 0xffffffff() [ 34.564876] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.565790] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b5b901 [ 34.566715] page dumped because: kasan: bad access detected [ 34.567378] [ 34.567593] Memory state around the buggy address: [ 34.568179] ffff8880146e0480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.569031] ffff8880146e0500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 34.569885] >ffff8880146e0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.570754] ^ [ 34.571436] ffff8880146e0600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 34.572380] ffff8880146e0680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.573317] ================================================================== [ 34.574532] Disabling lock debugging due to kernel taint [ 36.577869] BUG: Bad rss-counter state mm:000000008e1ed4f5 type:MM_FILEPAGES val:33 [ 36.579091] BUG: Bad rss-counter state mm:000000008e1ed4f5 type:MM_ANONPAGES val:22 [ 37.038832] BUG: Bad rss-counter state mm:0000000068d4c16d type:MM_FILEPAGES val:33 [ 37.039814] BUG: Bad rss-counter state mm:0000000068d4c16d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34380' (ECDSA) to the list of known hosts. 2023/06/19 17:32:36 fuzzer started 2023/06/19 17:32:36 dialing manager at localhost:44161 2023/06/19 17:32:36 checking machine... 2023/06/19 17:32:36 checking revisions... [ 37.770665] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:32:37 testing simple program... [ 37.820322] cgroup: Unknown subsys name 'net' [ 37.873225] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:32:32 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fff2a2d6f78 CR3=0000000005482000 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=00007fb97263b5100000562416153790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000001 RCX=ffffffff81abe1b2 RDX=ffff888015dc0000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800ffd4000 RSP=ffff8880165976e8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88800ffd6000 R13=0000000000000000 R14=ffff88800ffd4600 R15=0000000000000000 RIP=ffffffff814c07eb 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 00007fd89d1a7700 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=00007ff26445efb0 CR3=0000000015f92000 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=2036333a32333a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a32333a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000