syzkaller login: [ 30.668400] BUG: Bad rss-counter state mm:000000005796f58b type:MM_FILEPAGES val:33 [ 30.669453] BUG: Bad rss-counter state mm:000000005796f58b type:MM_ANONPAGES val:22 [ 30.831967] ================================================================== [ 30.832876] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.833813] Read of size 8 at addr ffff888016670b38 by task sshd/221 [ 30.834577] [ 30.834794] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.835782] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.836759] Call Trace: [ 30.837081] [ 30.837491] dump_stack_lvl+0x91/0xf0 [ 30.838097] print_report+0xcc/0x620 [ 30.838686] ? __virt_addr_valid+0x102/0x340 [ 30.839348] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.840099] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.840866] kasan_report+0xbe/0xf0 [ 30.841457] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.842210] vma_interval_tree_remove+0xc75/0xec0 [ 30.842940] vma_prepare+0xc54/0x11a0 [ 30.843522] __split_vma+0x5af/0x950 [ 30.844094] ? __pfx___split_vma+0x10/0x10 [ 30.844750] ? find_held_lock+0x2c/0x110 [ 30.845383] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.846069] ? lock_is_held_type+0x9f/0x120 [ 30.846727] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.847460] ? mtree_range_walk+0x632/0x900 [ 30.848132] ? mas_walk+0x5c7/0x7c0 [ 30.848742] do_vmi_munmap+0x1f1/0x2b0 [ 30.849341] mmap_region+0x1f9/0x2660 [ 30.849920] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.850323] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.850853] ? __pfx_lock_acquire+0x10/0x10 [ 30.851251] ? __pfx_mmap_region+0x10/0x10 [ 30.851639] ? security_mmap_addr+0x7d/0xa0 [ 30.852017] ? get_unmapped_area+0x1f5/0x3f0 [ 30.852404] do_mmap+0x854/0xf00 [ 30.852720] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.853074] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.853471] ksys_mmap_pgoff+0x3af/0x500 [ 30.853834] do_syscall_64+0x3f/0x90 [ 30.854178] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.854638] RIP: 0033:0x7f1776396d82 [ 30.854966] 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 [ 30.856483] RSP: 002b:00007ffd5aec5748 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.857129] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1776396d82 [ 30.857732] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f17757d0000 [ 30.858334] RBP: 00007f17757d0000 R08: 0000000000000009 R09: 0000000000001000 [ 30.858935] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564e31d69d90 [ 30.859535] R13: 00007ffd5aec5760 R14: 00007ffd5aec5790 R15: 00007ffd5aec5af0 [ 30.860150] [ 30.860358] [ 30.860528] Allocated by task 214: [ 30.860833] kasan_save_stack+0x22/0x50 [ 30.861191] kasan_set_track+0x25/0x30 [ 30.861545] __kasan_slab_alloc+0x59/0x70 [ 30.861918] kmem_cache_alloc+0x16b/0x370 [ 30.862282] vm_area_dup+0x20/0x160 [ 30.862602] __split_vma+0x170/0x950 [ 30.862936] split_vma+0xc6/0x110 [ 30.863248] mprotect_fixup+0x8d2/0xb30 [ 30.863600] do_mprotect_pkey+0x87e/0xd40 [ 30.863965] __x64_sys_mprotect+0x78/0xc0 [ 30.864337] do_syscall_64+0x3f/0x90 [ 30.864676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.865133] [ 30.865284] Freed by task 214: [ 30.865561] kasan_save_stack+0x22/0x50 [ 30.865915] kasan_set_track+0x25/0x30 [ 30.866265] kasan_save_free_info+0x2b/0x50 [ 30.866639] __kasan_slab_free+0x10a/0x190 [ 30.867019] kmem_cache_free+0x10d/0x4d0 [ 30.867379] rcu_core+0x8c8/0x2860 [ 30.867694] __do_softirq+0x1b7/0x7d4 [ 30.868031] [ 30.868184] Last potentially related work creation: [ 30.868610] kasan_save_stack+0x22/0x50 [ 30.868963] __kasan_record_aux_stack+0x8e/0xa0 [ 30.869365] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.869825] remove_vma+0x139/0x170 [ 30.870147] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.870538] do_vmi_munmap+0x1f1/0x2b0 [ 30.870882] __vm_munmap+0x138/0x3a0 [ 30.871216] __x64_sys_munmap+0x59/0x80 [ 30.871565] do_syscall_64+0x3f/0x90 [ 30.871904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.872355] [ 30.872519] Second to last potentially related work creation: [ 30.872999] kasan_save_stack+0x22/0x50 [ 30.873351] __kasan_record_aux_stack+0x8e/0xa0 [ 30.873755] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.874208] remove_vma+0x139/0x170 [ 30.874524] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.874914] do_vmi_munmap+0x1f1/0x2b0 [ 30.875255] mmap_region+0x1f9/0x2660 [ 30.875590] do_mmap+0x854/0xf00 [ 30.875895] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.876242] ksys_mmap_pgoff+0x3af/0x500 [ 30.876601] do_syscall_64+0x3f/0x90 [ 30.876935] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.877386] [ 30.877539] The buggy address belongs to the object at ffff888016670ae0 [ 30.877539] which belongs to the cache vm_area_struct of size 168 [ 30.878579] The buggy address is located 88 bytes inside of [ 30.878579] freed 168-byte region [ffff888016670ae0, ffff888016670b88) [ 30.879582] [ 30.879736] The buggy address belongs to the physical page: [ 30.880200] page:000000002a4c2fe8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16670 [ 30.880995] memcg:ffff888018c7f401 [ 30.881300] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.881797] page_type: 0xffffffff() [ 30.882117] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 0000000000000001 [ 30.882776] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018c7f401 [ 30.883421] page dumped because: kasan: bad access detected [ 30.883888] [ 30.884040] Memory state around the buggy address: [ 30.884455] ffff888016670a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.885062] ffff888016670a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.885669] >ffff888016670b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.886269] ^ [ 30.886704] ffff888016670b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 30.887312] ffff888016670c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.887913] ================================================================== [ 30.888615] Disabling lock debugging due to kernel taint [ 33.209081] BUG: Bad rss-counter state mm:00000000499a3bb5 type:MM_FILEPAGES val:33 [ 33.210249] BUG: Bad rss-counter state mm:00000000499a3bb5 type:MM_ANONPAGES val:22 [ 33.587102] BUG: Bad rss-counter state mm:00000000d027e4fd type:MM_FILEPAGES val:33 [ 33.588564] BUG: Bad rss-counter state mm:00000000d027e4fd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1609' (ECDSA) to the list of known hosts. 2023/06/20 21:23:39 fuzzer started 2023/06/20 21:23:39 dialing manager at localhost:36067 2023/06/20 21:23:39 checking machine... 2023/06/20 21:23:39 checking revisions... [ 34.272176] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:23:39 testing simple program... [ 34.314855] cgroup: Unknown subsys name 'net' [ 34.348028] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:23:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff86621100 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=ffffffff813a0b26 RDI=0000000000000001 RBP=ffffffffffffffff RSP=ffff88806ce09a20 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=0000000000000000 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88801aaf9080 RIP=ffffffff814c0891 RFL=00000206 [-----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 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=00007ff7497a5040 CR3=000000000e104000 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=2039333a33323a3132203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a33323a3132203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff110018a4234 RSI=ffffffff81f16c03 RDI=ffff88800c5211a2 RBP=ffff88800b568c98 RSP=ffff88800dca78b0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=ffff88800c521180 R13=0000000000000000 R14=0000000000000001 R15=0000000000000000 RIP=ffffffff81f16c1d RFL=00000212 [----A--] 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 00007f543bcc0900 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=00007fff74072000 CR3=000000000cfba000 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=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