syzkaller login: [ 35.769634] BUG: Bad rss-counter state mm:00000000d31a158a type:MM_FILEPAGES val:33 [ 35.770596] BUG: Bad rss-counter state mm:00000000d31a158a type:MM_ANONPAGES val:22 [ 35.944091] ================================================================== [ 35.945228] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.946342] Read of size 8 at addr ffff88800cc2e880 by task sshd/220 [ 35.947407] [ 35.947639] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.948570] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.949668] Call Trace: [ 35.950015] <TASK> [ 35.950320] dump_stack_lvl+0x91/0xf0 [ 35.950844] print_report+0xcc/0x620 [ 35.951362] ? __virt_addr_valid+0x102/0x340 [ 35.951957] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.952620] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.953292] kasan_report+0xbe/0xf0 [ 35.953819] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.954513] vma_interval_tree_remove+0xc75/0xec0 [ 35.955179] vma_prepare+0xc54/0x11a0 [ 35.955711] __split_vma+0x5af/0x950 [ 35.956236] ? __pfx___split_vma+0x10/0x10 [ 35.956841] ? find_held_lock+0x2c/0x110 [ 35.957428] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.958055] ? lock_is_held_type+0x9f/0x120 [ 35.958653] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.959324] ? mtree_range_walk+0x632/0x900 [ 35.959941] ? mas_walk+0x5c7/0x7c0 [ 35.960471] do_vmi_munmap+0x1f1/0x2b0 [ 35.961023] mmap_region+0x1f9/0x2660 [ 35.961557] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.962116] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.962895] ? __pfx_lock_acquire+0x10/0x10 [ 35.963470] ? __pfx_mmap_region+0x10/0x10 [ 35.964038] ? security_mmap_addr+0x7d/0xa0 [ 35.964605] ? get_unmapped_area+0x1f5/0x3f0 [ 35.965229] do_mmap+0x854/0xf00 [ 35.965698] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.966234] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.966847] ksys_mmap_pgoff+0x3af/0x500 [ 35.967393] do_syscall_64+0x3f/0x90 [ 35.967910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.968613] RIP: 0033:0x7fc929336d82 [ 35.969116] 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 [ 35.971437] RSP: 002b:00007fff6e726428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.972439] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc929336d82 [ 35.973380] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc928770000 [ 35.974327] RBP: 00007fc928770000 R08: 0000000000000009 R09: 0000000000001000 [ 35.975270] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ac7f4abec0 [ 35.976200] R13: 00007fff6e726440 R14: 00007fff6e726470 R15: 00007fff6e7267d0 [ 35.977149] </TASK> [ 35.977471] [ 35.977708] Allocated by task 213: [ 35.978180] kasan_save_stack+0x22/0x50 [ 35.978730] kasan_set_track+0x25/0x30 [ 35.979275] __kasan_slab_alloc+0x59/0x70 [ 35.979847] kmem_cache_alloc+0x16b/0x370 [ 35.980421] vm_area_dup+0x20/0x160 [ 35.980930] __split_vma+0x170/0x950 [ 35.981441] split_vma+0xc6/0x110 [ 35.981926] mprotect_fixup+0x8d2/0xb30 [ 35.982484] do_mprotect_pkey+0x87e/0xd40 [ 35.983058] __x64_sys_mprotect+0x78/0xc0 [ 35.983635] do_syscall_64+0x3f/0x90 [ 35.984149] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.984853] [ 35.985089] Freed by task 213: [ 35.985523] kasan_save_stack+0x22/0x50 [ 35.986081] kasan_set_track+0x25/0x30 [ 35.986624] kasan_save_free_info+0x2b/0x50 [ 35.987209] __kasan_slab_free+0x10a/0x190 [ 35.987862] kmem_cache_free+0x10d/0x4d0 [ 35.988424] rcu_core+0x8c8/0x2860 [ 35.988927] __do_softirq+0x1b7/0x7d4 [ 35.989457] [ 35.989693] Last potentially related work creation: [ 35.990336] kasan_save_stack+0x22/0x50 [ 35.990894] __kasan_record_aux_stack+0x8e/0xa0 [ 35.991531] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.992246] remove_vma+0x139/0x170 [ 35.992747] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.993373] do_vmi_munmap+0x1f1/0x2b0 [ 35.993914] __vm_munmap+0x138/0x3a0 [ 35.994435] __x64_sys_munmap+0x59/0x80 [ 35.994984] do_syscall_64+0x3f/0x90 [ 35.995501] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.996218] [ 35.996455] The buggy address belongs to the object at ffff88800cc2e828 [ 35.996455] which belongs to the cache vm_area_struct of size 168 [ 35.998093] The buggy address is located 88 bytes inside of [ 35.998093] freed 168-byte region [ffff88800cc2e828, ffff88800cc2e8d0) [ 35.999655] [ 35.999894] The buggy address belongs to the physical page: [ 36.000622] page:00000000ad1f02c3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcc2e [ 36.001834] memcg:ffff88800ec0dd01 [ 36.002309] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.003027] page_type: 0xffffffff() [ 36.003529] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 36.004550] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec0dd01 [ 36.005565] page dumped because: kasan: bad access detected [ 36.006299] [ 36.006539] Memory state around the buggy address: [ 36.007177] ffff88800cc2e780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 36.008120] ffff88800cc2e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 36.009072] >ffff88800cc2e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 36.010010] ^ [ 36.010465] ffff88800cc2e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.011410] ffff88800cc2e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 36.012350] ================================================================== [ 36.013471] Disabling lock debugging due to kernel taint [ 38.026798] BUG: Bad rss-counter state mm:000000007a799630 type:MM_FILEPAGES val:33 [ 38.027930] BUG: Bad rss-counter state mm:000000007a799630 type:MM_ANONPAGES val:22 [ 38.419276] BUG: Bad rss-counter state mm:00000000d56d8b1e type:MM_FILEPAGES val:33 [ 38.420220] BUG: Bad rss-counter state mm:00000000d56d8b1e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20884' (ECDSA) to the list of known hosts. 2023/06/19 15:02:23 fuzzer started 2023/06/19 15:02:23 dialing manager at localhost:44161 2023/06/19 15:02:23 checking machine... 2023/06/19 15:02:23 checking revisions... [ 39.227625] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:02:23 testing simple program... [ 39.281618] cgroup: Unknown subsys name 'net' [ 39.329601] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:02:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888019cb7c48 RCX=ffffffff8189f4b3 RDX=ffff8880159c1b40 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888019cb7b00 RSP=ffff888019cb7a00 R8 =0000000000000005 R9 =0000000000600000 R10=0000000000400000 R11=0000000000000001 R12=ffff88801692ea48 R13=0000000000000040 R14=0000000000000141 R15=ffff88801ac502b0 RIP=ffffffff814c0245 RFL=00000293 [--S-A-C] 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 00007fc70272b900 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=00007ffcb3222000 CR3=0000000016528000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=0000000000000001 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=00007fdb69248730 CR3=000000000d3ce000 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=abc008ca26108d8ada46a79cbaa8995b XMM02=ec2efd57dc4c00df000000000011f2d8 XMM03=aa06fa064d52f945000000000011f3a8 XMM04=88ad61259967649700000000000ae988 XMM05=19e9129bd510f2350000000000133778 XMM06=fe64d62624e9406800000000001325e0 XMM07=e042d86d42eb936e0000000000123f18 XMM08=aa06fa064d52f945000000000011f3a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000