syzkaller login: [ 39.489297] BUG: Bad rss-counter state mm:000000004a522de0 type:MM_FILEPAGES val:33 [ 39.490581] BUG: Bad rss-counter state mm:000000004a522de0 type:MM_ANONPAGES val:22 [ 39.541660] ================================================================== [ 39.542893] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.544123] Read of size 8 at addr ffff8880196cbed8 by task sshd/219 [ 39.545386] [ 39.545693] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.546891] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.548274] Call Trace: [ 39.548746] [ 39.549145] dump_stack_lvl+0x91/0xf0 [ 39.549736] print_report+0xcc/0x620 [ 39.550308] ? __virt_addr_valid+0x102/0x340 [ 39.550955] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.551694] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.552458] kasan_report+0xbe/0xf0 [ 39.553079] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.553821] vma_interval_tree_remove+0xc75/0xec0 [ 39.554542] vma_prepare+0xc54/0x11a0 [ 39.555126] __split_vma+0x5af/0x950 [ 39.555694] ? __pfx___split_vma+0x10/0x10 [ 39.556370] ? find_held_lock+0x2c/0x110 [ 39.557051] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.557747] ? lock_is_held_type+0x9f/0x120 [ 39.558422] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.559156] ? mtree_range_walk+0x632/0x900 [ 39.559798] ? mas_walk+0x5c7/0x7c0 [ 39.560401] do_vmi_munmap+0x1f1/0x2b0 [ 39.561005] mmap_region+0x1f9/0x2660 [ 39.561576] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.562243] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.563105] ? __pfx_lock_acquire+0x10/0x10 [ 39.563771] ? __pfx_mmap_region+0x10/0x10 [ 39.564441] ? security_mmap_addr+0x7d/0xa0 [ 39.565071] ? get_unmapped_area+0x1f5/0x3f0 [ 39.565721] do_mmap+0x854/0xf00 [ 39.566266] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.566870] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.567539] ksys_mmap_pgoff+0x3af/0x500 [ 39.568182] do_syscall_64+0x3f/0x90 [ 39.568760] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.569555] RIP: 0033:0x7f0bc6684d82 [ 39.570097] 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 [ 39.572675] RSP: 002b:00007fff3fc13d58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.573769] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0bc6684d82 [ 39.574807] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0bc5abe000 [ 39.575834] RBP: 00007f0bc5abe000 R08: 0000000000000009 R09: 0000000000001000 [ 39.576889] R10: 0000000000000812 R11: 0000000000000206 R12: 00005591f8c55d90 [ 39.577905] R13: 00007fff3fc13d70 R14: 00007fff3fc13da0 R15: 00007fff3fc14100 [ 39.578931] [ 39.579275] [ 39.579531] Allocated by task 212: [ 39.580039] kasan_save_stack+0x22/0x50 [ 39.580677] kasan_set_track+0x25/0x30 [ 39.581307] __kasan_slab_alloc+0x59/0x70 [ 39.581930] kmem_cache_alloc+0x16b/0x370 [ 39.582558] vm_area_dup+0x20/0x160 [ 39.583107] __split_vma+0x170/0x950 [ 39.583664] split_vma+0xc6/0x110 [ 39.584194] mprotect_fixup+0x8d2/0xb30 [ 39.584836] do_mprotect_pkey+0x87e/0xd40 [ 39.585470] __x64_sys_mprotect+0x78/0xc0 [ 39.586098] do_syscall_64+0x3f/0x90 [ 39.586672] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.587461] [ 39.587714] Freed by task 13: [ 39.588185] kasan_save_stack+0x22/0x50 [ 39.588830] kasan_set_track+0x25/0x30 [ 39.589414] kasan_save_free_info+0x2b/0x50 [ 39.590047] __kasan_slab_free+0x10a/0x190 [ 39.590688] kmem_cache_free+0x10d/0x4d0 [ 39.591294] rcu_core+0x8c8/0x2860 [ 39.591806] __do_softirq+0x1b7/0x7d4 [ 39.592391] [ 39.592644] Last potentially related work creation: [ 39.593358] kasan_save_stack+0x22/0x50 [ 39.593952] __kasan_record_aux_stack+0x8e/0xa0 [ 39.594632] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.595408] remove_vma+0x139/0x170 [ 39.595959] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.596627] do_vmi_munmap+0x1f1/0x2b0 [ 39.597236] __vm_munmap+0x138/0x3a0 [ 39.597790] __x64_sys_munmap+0x59/0x80 [ 39.598384] do_syscall_64+0x3f/0x90 [ 39.598949] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.599712] [ 39.599968] The buggy address belongs to the object at ffff8880196cbe80 [ 39.599968] which belongs to the cache vm_area_struct of size 168 [ 39.601760] The buggy address is located 88 bytes inside of [ 39.601760] freed 168-byte region [ffff8880196cbe80, ffff8880196cbf28) [ 39.603443] [ 39.603703] The buggy address belongs to the physical page: [ 39.604503] page:00000000e813a203 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x196cb [ 39.605825] memcg:ffff888010395b01 [ 39.606336] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.607113] page_type: 0xffffffff() [ 39.607641] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.608725] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010395b01 [ 39.609793] page dumped because: kasan: bad access detected [ 39.610547] [ 39.610832] Memory state around the buggy address: [ 39.611514] ffff8880196cbd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.612528] ffff8880196cbe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 39.613533] >ffff8880196cbe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.614541] ^ [ 39.615432] ffff8880196cbf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 39.616452] ffff8880196cbf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.617453] ================================================================== [ 39.618542] Disabling lock debugging due to kernel taint [ 41.984571] BUG: Bad rss-counter state mm:000000004bcb3627 type:MM_FILEPAGES val:33 [ 41.985763] BUG: Bad rss-counter state mm:000000004bcb3627 type:MM_ANONPAGES val:22 [ 42.470407] BUG: Bad rss-counter state mm:000000000ecb8d0e type:MM_FILEPAGES val:33 [ 42.471378] BUG: Bad rss-counter state mm:000000000ecb8d0e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15907' (ECDSA) to the list of known hosts. 2023/06/19 19:08:51 fuzzer started 2023/06/19 19:08:52 dialing manager at localhost:44161 2023/06/19 19:08:52 checking machine... 2023/06/19 19:08:52 checking revisions... [ 43.147756] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:08:52 testing simple program... [ 43.201549] cgroup: Unknown subsys name 'net' [ 43.247095] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:08:51 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800ffbe6e0 RCX=0000000000000000 RDX=1ffff11001ce8d9a RSI=ffffffff818ea875 RDI=ffff88800e746cd0 RBP=0000000000000008 RSP=ffff88800d937c98 R8 =0000000000000004 R9 =0000000000000008 R10=0000000000000040 R11=0000000000000000 R12=ffff88800e746c80 R13=0000000000000000 R14=dffffc0000000000 R15=0000000000000000 RIP=ffffffff818ea89c 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 00007fc2a365f900 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=00007ffda3674000 CR3=000000000eaa6000 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=6720646572637465733a4d41503d706f 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 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88800969b200 RCX=ffffea0000000000 RDX=ffffea000025a681 RSI=0000000000000000 RDI=ffffffff856d8220 RBP=ffffffff856d8220 RSP=ffff888008e57cd0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=0000000000000287 R13=ffffea000025a680 R14=ffffffff813782a8 R15=ffff88800969b208 RIP=ffffffff8452fd0d 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 =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=00007f3ca9580000 CR3=0000000013a64000 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=0100ffffffffffffffff00ffffffffff XMM02=2e322e325f4342494c4700352e322e32 XMM03=0000000000000000004700352e322e32 XMM04=4342494c4700362e322e325f4342494c XMM05=00007f3ca936cf6000007f3ca9526950 XMM06=00007f3ca952644000007f3ca9525f20 XMM07=00007f3ca8e7012000007f3ca8e6fb10 XMM08=00007f3ca8e6f5f000007f3ca8e6f060 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000