syzkaller login: [ 23.922740] BUG: Bad rss-counter state mm:000000007e171f11 type:MM_FILEPAGES val:33 [ 23.923941] BUG: Bad rss-counter state mm:000000007e171f11 type:MM_ANONPAGES val:22 [ 23.967524] ================================================================== [ 23.968443] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.969541] Read of size 8 at addr ffff888019879a50 by task sshd/219 [ 23.970333] [ 23.970639] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.971703] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.972858] Call Trace: [ 23.973181] [ 23.973468] dump_stack_lvl+0x91/0xf0 [ 23.973963] print_report+0xcc/0x620 [ 23.974466] ? __virt_addr_valid+0x102/0x340 [ 23.975036] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.975654] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.976278] kasan_report+0xbe/0xf0 [ 23.976754] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.977381] vma_interval_tree_remove+0xc75/0xec0 [ 23.977988] vma_prepare+0xc54/0x11a0 [ 23.978480] __split_vma+0x5af/0x950 [ 23.978959] ? __pfx___split_vma+0x10/0x10 [ 23.979494] ? find_held_lock+0x2c/0x110 [ 23.980020] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.980589] ? lock_is_held_type+0x9f/0x120 [ 23.981129] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.981739] ? mtree_range_walk+0x632/0x900 [ 23.982299] ? mas_walk+0x5c7/0x7c0 [ 23.982802] do_vmi_munmap+0x1f1/0x2b0 [ 23.983310] mmap_region+0x1f9/0x2660 [ 23.983794] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.984312] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.985039] ? __pfx_lock_acquire+0x10/0x10 [ 23.985582] ? __pfx_mmap_region+0x10/0x10 [ 23.986118] ? security_mmap_addr+0x7d/0xa0 [ 23.986655] ? get_unmapped_area+0x1f5/0x3f0 [ 23.987208] do_mmap+0x854/0xf00 [ 23.987652] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.988147] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.988713] ksys_mmap_pgoff+0x3af/0x500 [ 23.989229] do_syscall_64+0x3f/0x90 [ 23.989714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.990370] RIP: 0033:0x7f8e8d3ced82 [ 23.990851] 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 [ 23.993011] RSP: 002b:00007ffedfed4538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.993929] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8e8d3ced82 [ 23.994797] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8e8c808000 [ 23.995652] RBP: 00007f8e8c808000 R08: 0000000000000009 R09: 0000000000001000 [ 23.996509] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f262ab7ec0 [ 23.997367] R13: 00007ffedfed4550 R14: 00007ffedfed4580 R15: 00007ffedfed48e0 [ 23.998235] [ 23.998535] [ 23.998750] Allocated by task 212: [ 23.999181] kasan_save_stack+0x22/0x50 [ 23.999690] kasan_set_track+0x25/0x30 [ 24.000193] __kasan_slab_alloc+0x59/0x70 [ 24.000720] kmem_cache_alloc+0x16b/0x370 [ 24.001241] vm_area_dup+0x20/0x160 [ 24.001698] __split_vma+0x170/0x950 [ 24.002167] split_vma+0xc6/0x110 [ 24.002628] mprotect_fixup+0x8d2/0xb30 [ 24.003137] do_mprotect_pkey+0x87e/0xd40 [ 24.003658] __x64_sys_mprotect+0x78/0xc0 [ 24.004186] do_syscall_64+0x3f/0x90 [ 24.004662] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.005312] [ 24.005528] Freed by task 212: [ 24.005922] kasan_save_stack+0x22/0x50 [ 24.006430] kasan_set_track+0x25/0x30 [ 24.006944] kasan_save_free_info+0x2b/0x50 [ 24.007482] __kasan_slab_free+0x10a/0x190 [ 24.008019] kmem_cache_free+0x10d/0x4d0 [ 24.008533] rcu_core+0x8c8/0x2860 [ 24.008977] __do_softirq+0x1b7/0x7d4 [ 24.009462] [ 24.009677] Last potentially related work creation: [ 24.010266] kasan_save_stack+0x22/0x50 [ 24.010784] __kasan_record_aux_stack+0x8e/0xa0 [ 24.011365] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.012016] remove_vma+0x139/0x170 [ 24.012472] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.013036] do_vmi_munmap+0x1f1/0x2b0 [ 24.013617] __vm_munmap+0x138/0x3a0 [ 24.014088] __x64_sys_munmap+0x59/0x80 [ 24.014597] do_syscall_64+0x3f/0x90 [ 24.015080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.015730] [ 24.015943] The buggy address belongs to the object at ffff8880198799f8 [ 24.015943] which belongs to the cache vm_area_struct of size 168 [ 24.017439] The buggy address is located 88 bytes inside of [ 24.017439] freed 168-byte region [ffff8880198799f8, ffff888019879aa0) [ 24.018853] [ 24.019077] The buggy address belongs to the physical page: [ 24.019743] page:000000007f59fc4b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19879 [ 24.020851] memcg:ffff888019a02b01 [ 24.021290] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.021940] page_type: 0xffffffff() [ 24.022399] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.023352] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019a02b01 [ 24.024267] page dumped because: kasan: bad access detected [ 24.024936] [ 24.025153] Memory state around the buggy address: [ 24.025745] ffff888019879900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.026616] ffff888019879980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 24.027480] >ffff888019879a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.028349] ^ [ 24.029060] ffff888019879a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 24.029921] ffff888019879b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.030782] ================================================================== [ 24.031782] Disabling lock debugging due to kernel taint [ 26.088033] BUG: Bad rss-counter state mm:000000001c2903f1 type:MM_FILEPAGES val:33 [ 26.089932] BUG: Bad rss-counter state mm:000000001c2903f1 type:MM_ANONPAGES val:22 [ 26.619156] BUG: Bad rss-counter state mm:000000002da475e2 type:MM_FILEPAGES val:33 [ 26.620436] BUG: Bad rss-counter state mm:000000002da475e2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14189' (ECDSA) to the list of known hosts. 2023/06/20 16:24:58 fuzzer started 2023/06/20 16:24:58 dialing manager at localhost:36067 2023/06/20 16:24:58 checking machine... 2023/06/20 16:24:58 checking revisions... [ 27.413625] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:24:58 testing simple program... [ 27.470877] cgroup: Unknown subsys name 'net' [ 27.564362] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:24:57 Registers: info registers vcpu 0 RAX=1ffff110018e9a5f RBX=ffff88800c74d2c8 RCX=1ffff11001355944 RDX=dffffc0000000000 RSI=ffff88800f1735d0 RDI=ffff88800c74d2f8 RBP=ffff88800f31c078 RSP=ffff888009ee7a28 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800f173400 R13=0000000000000000 R14=ffff8880167da638 R15=ffff8880167da5f0 RIP=ffffffff8184767e 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 00007fc99e022900 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=00007fc99e5da0b0 CR3=000000000e758000 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=ffff888015828001 RBX=ffff888015827480 RCX=0000000000000001 RDX=ffff888015827901 RSI=ffff8880158279c8 RDI=ffff888015827490 RBP=ffff8880158279c8 RSP=ffff8880158273d8 R8 =0000000000000001 R9 =ffff8880158274c0 R10=0000000000038001 R11=0000000000025fc6 R12=0000000000000008 R13=ffff888015820000 R14=ffff8880158279c8 R15=ffff888015827480 RIP=ffffffff8113048d RFL=00000287 [--S--PC] 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 00007f973f8ea900 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=00007f973ed411b0 CR3=000000000d8c2000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=80cd1558ab613e9700000000000ae988 XMM05=4a9614e660746d9a0000000000132410 XMM06=806171799158d9670000000000130e90 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000