syzkaller login: [ 33.838618] BUG: Bad rss-counter state mm:00000000829854b1 type:MM_FILEPAGES val:33 [ 33.839675] BUG: Bad rss-counter state mm:00000000829854b1 type:MM_ANONPAGES val:22 [ 34.016738] ================================================================== [ 34.017732] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.018741] Read of size 8 at addr ffff88800df8f3f8 by task sshd/220 [ 34.019668] [ 34.019995] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.020900] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.021955] Call Trace: [ 34.022291] <TASK> [ 34.022595] dump_stack_lvl+0x91/0xf0 [ 34.023114] print_report+0xcc/0x620 [ 34.023627] ? __virt_addr_valid+0x102/0x340 [ 34.024209] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.024858] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.025521] kasan_report+0xbe/0xf0 [ 34.026027] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.026698] vma_interval_tree_remove+0xc75/0xec0 [ 34.027351] vma_prepare+0xc54/0x11a0 [ 34.027863] __split_vma+0x5af/0x950 [ 34.028377] ? __pfx___split_vma+0x10/0x10 [ 34.028952] ? find_held_lock+0x2c/0x110 [ 34.029520] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.030130] ? lock_is_held_type+0x9f/0x120 [ 34.030711] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.031367] ? mtree_range_walk+0x632/0x900 [ 34.031959] ? mas_walk+0x5c7/0x7c0 [ 34.032471] do_vmi_munmap+0x1f1/0x2b0 [ 34.033011] mmap_region+0x1f9/0x2660 [ 34.033532] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.034083] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.034843] ? __pfx_lock_acquire+0x10/0x10 [ 34.035418] ? __pfx_mmap_region+0x10/0x10 [ 34.035984] ? security_mmap_addr+0x7d/0xa0 [ 34.036552] ? get_unmapped_area+0x1f5/0x3f0 [ 34.037159] do_mmap+0x854/0xf00 [ 34.037632] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.038167] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.038765] ksys_mmap_pgoff+0x3af/0x500 [ 34.039307] do_syscall_64+0x3f/0x90 [ 34.039816] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.040498] RIP: 0033:0x7fc443faad82 [ 34.041105] 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 [ 34.043301] RSP: 002b:00007ffe2e6f7d78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.044211] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc443faad82 [ 34.045078] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc4433e4000 [ 34.046044] RBP: 00007fc4433e4000 R08: 0000000000000009 R09: 0000000000001000 [ 34.047149] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b4d608cec0 [ 34.048012] R13: 00007ffe2e6f7d90 R14: 00007ffe2e6f7dc0 R15: 00007ffe2e6f8120 [ 34.048869] </TASK> [ 34.049175] [ 34.049394] Allocated by task 212: [ 34.049824] kasan_save_stack+0x22/0x50 [ 34.050336] kasan_set_track+0x25/0x30 [ 34.050834] __kasan_slab_alloc+0x59/0x70 [ 34.051363] kmem_cache_alloc+0x16b/0x370 [ 34.051875] vm_area_dup+0x20/0x160 [ 34.052342] __split_vma+0x170/0x950 [ 34.052807] split_vma+0xc6/0x110 [ 34.053267] mprotect_fixup+0x8d2/0xb30 [ 34.053777] do_mprotect_pkey+0x87e/0xd40 [ 34.054298] __x64_sys_mprotect+0x78/0xc0 [ 34.054824] do_syscall_64+0x3f/0x90 [ 34.055296] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.055944] [ 34.056159] Freed by task 212: [ 34.056553] kasan_save_stack+0x22/0x50 [ 34.057059] kasan_set_track+0x25/0x30 [ 34.057550] kasan_save_free_info+0x2b/0x50 [ 34.058088] __kasan_slab_free+0x10a/0x190 [ 34.058617] kmem_cache_free+0x10d/0x4d0 [ 34.059129] rcu_core+0x8c8/0x2860 [ 34.059580] __do_softirq+0x1b7/0x7d4 [ 34.060059] [ 34.060275] Last potentially related work creation: [ 34.060932] kasan_save_stack+0x22/0x50 [ 34.061465] __kasan_record_aux_stack+0x8e/0xa0 [ 34.062040] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.062687] remove_vma+0x139/0x170 [ 34.063141] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.063705] do_vmi_munmap+0x1f1/0x2b0 [ 34.064199] __vm_munmap+0x138/0x3a0 [ 34.064665] __x64_sys_munmap+0x59/0x80 [ 34.065169] do_syscall_64+0x3f/0x90 [ 34.065646] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.066287] [ 34.066505] Second to last potentially related work creation: [ 34.067187] kasan_save_stack+0x22/0x50 [ 34.067690] __kasan_record_aux_stack+0x8e/0xa0 [ 34.068265] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.068907] remove_vma+0x139/0x170 [ 34.069370] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.069927] do_vmi_munmap+0x1f1/0x2b0 [ 34.070412] mmap_region+0x1f9/0x2660 [ 34.070891] do_mmap+0x854/0xf00 [ 34.071322] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.071811] ksys_mmap_pgoff+0x3af/0x500 [ 34.072322] do_syscall_64+0x3f/0x90 [ 34.072797] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.073460] [ 34.073675] The buggy address belongs to the object at ffff88800df8f3a0 [ 34.073675] which belongs to the cache vm_area_struct of size 168 [ 34.075137] The buggy address is located 88 bytes inside of [ 34.075137] freed 168-byte region [ffff88800df8f3a0, ffff88800df8f448) [ 34.076534] [ 34.076750] The buggy address belongs to the physical page: [ 34.077425] page:0000000035ae8a57 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf8f [ 34.078503] memcg:ffff88800db3fa01 [ 34.078927] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.079638] page_type: 0xffffffff() [ 34.080097] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 34.081043] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db3fa01 [ 34.081952] page dumped because: kasan: bad access detected [ 34.082615] [ 34.082834] Memory state around the buggy address: [ 34.083435] ffff88800df8f280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 34.084319] ffff88800df8f300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 34.085190] >ffff88800df8f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 34.086059] ^ [ 34.086912] ffff88800df8f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 34.087796] ffff88800df8f480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.088654] ================================================================== [ 34.089688] Disabling lock debugging due to kernel taint [ 36.330149] BUG: Bad rss-counter state mm:000000001c02eb0a type:MM_FILEPAGES val:33 [ 36.331262] BUG: Bad rss-counter state mm:000000001c02eb0a type:MM_ANONPAGES val:22 [ 36.787701] BUG: Bad rss-counter state mm:0000000027a09c28 type:MM_FILEPAGES val:33 [ 36.789146] BUG: Bad rss-counter state mm:0000000027a09c28 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51682' (ECDSA) to the list of known hosts. 2023/06/19 17:53:16 fuzzer started 2023/06/19 17:53:17 dialing manager at localhost:44161 2023/06/19 17:53:17 checking machine... 2023/06/19 17:53:17 checking revisions... [ 37.488802] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:53:17 testing simple program... [ 37.533459] cgroup: Unknown subsys name 'net' [ 37.582730] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:53:11 Registers: info registers vcpu 0 RAX=000055a905a15590 RBX=0000000000000000 RCX=00007f060bd838d0 RDX=00007f05f401f820 RSI=00007f0604004ea0 RDI=000055a907808e80 RBP=00007f0604004ea0 RSP=00007f060bd837e0 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000003 R11=0000000000000286 R12=00007f060bd838d0 R13=00007f0604004ea0 R14=000055a905aa2ec0 R15=00007f05f401f820 RIP=000055a905a6153b RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f060bd84700 00000000 00000000 GS =0000 0000000000000000 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=00007f19b6710ad0 CR3=000000000d794000 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=2036313a33353a3731203931206e754a XMM01=5f687373203a726f727265203a5d3733 XMM02=632079746972756365732078756e694c XMM03=742064656c696146203a656d616e7962 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a33353a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000202 RCX=ffffffff812e0423 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff888010226e40 RBP=ffffffff8452fffc RSP=ffff88800eb57d18 R8 =0000000000000000 R9 =ffffed1002044dc8 R10=ffff888010226e43 R11=00000000000b6cb2 R12=ffff888010226ed0 R13=ffff888010226e80 R14=ffffffff813782a8 R15=ffff888019a7d8a0 RIP=ffffffff81534237 RFL=00000002 [-------] 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 00007f211ca43900 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=000055e0ff117a1c CR3=000000000e786000 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=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000