syzkaller login: [ 34.693296] BUG: Bad rss-counter state mm:0000000020d1f780 type:MM_FILEPAGES val:33 [ 34.694676] BUG: Bad rss-counter state mm:0000000020d1f780 type:MM_ANONPAGES val:22 [ 34.852353] ================================================================== [ 34.853353] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.854128] Read of size 8 at addr ffff88800d8b7880 by task sshd/219 [ 34.854855] [ 34.855029] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.855733] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.856538] Call Trace: [ 34.856793] [ 34.857050] dump_stack_lvl+0x91/0xf0 [ 34.857453] print_report+0xcc/0x620 [ 34.857846] ? __virt_addr_valid+0x102/0x340 [ 34.858303] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.858804] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.859303] kasan_report+0xbe/0xf0 [ 34.859692] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.860212] vma_interval_tree_remove+0xc75/0xec0 [ 34.860703] vma_prepare+0xc54/0x11a0 [ 34.861094] __split_vma+0x5af/0x950 [ 34.861485] ? __pfx___split_vma+0x10/0x10 [ 34.861915] ? find_held_lock+0x2c/0x110 [ 34.862328] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.862773] ? lock_is_held_type+0x9f/0x120 [ 34.863195] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.863662] ? mtree_range_walk+0x632/0x900 [ 34.864106] ? mas_walk+0x5c7/0x7c0 [ 34.864474] do_vmi_munmap+0x1f1/0x2b0 [ 34.864852] mmap_region+0x1f9/0x2660 [ 34.865215] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.865518] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.865937] ? __pfx_lock_acquire+0x10/0x10 [ 34.866246] ? __pfx_mmap_region+0x10/0x10 [ 34.866558] ? security_mmap_addr+0x7d/0xa0 [ 34.866871] ? get_unmapped_area+0x1f5/0x3f0 [ 34.867193] do_mmap+0x854/0xf00 [ 34.867452] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.867741] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.868069] ksys_mmap_pgoff+0x3af/0x500 [ 34.868376] do_syscall_64+0x3f/0x90 [ 34.868655] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.869039] RIP: 0033:0x7fb7a84f3d82 [ 34.869307] 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 [ 34.870556] RSP: 002b:00007ffeac81f5f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.871093] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb7a84f3d82 [ 34.871593] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb7a792d000 [ 34.872097] RBP: 00007fb7a792d000 R08: 0000000000000009 R09: 0000000000001000 [ 34.872601] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b09861eec0 [ 34.873099] R13: 00007ffeac81f610 R14: 00007ffeac81f640 R15: 00007ffeac81f9a0 [ 34.873601] [ 34.873773] [ 34.873897] Allocated by task 212: [ 34.874149] kasan_save_stack+0x22/0x50 [ 34.874443] kasan_set_track+0x25/0x30 [ 34.874730] __kasan_slab_alloc+0x59/0x70 [ 34.875033] kmem_cache_alloc+0x16b/0x370 [ 34.875335] vm_area_dup+0x20/0x160 [ 34.875602] __split_vma+0x170/0x950 [ 34.875875] split_vma+0xc6/0x110 [ 34.876145] mprotect_fixup+0x8d2/0xb30 [ 34.876436] do_mprotect_pkey+0x87e/0xd40 [ 34.876739] __x64_sys_mprotect+0x78/0xc0 [ 34.877041] do_syscall_64+0x3f/0x90 [ 34.877327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.877702] [ 34.877828] Freed by task 212: [ 34.878056] kasan_save_stack+0x22/0x50 [ 34.878348] kasan_set_track+0x25/0x30 [ 34.878636] kasan_save_free_info+0x2b/0x50 [ 34.878944] __kasan_slab_free+0x10a/0x190 [ 34.879252] kmem_cache_free+0x10d/0x4d0 [ 34.879544] rcu_core+0x8c8/0x2860 [ 34.879796] __do_softirq+0x1b7/0x7d4 [ 34.880076] [ 34.880211] Last potentially related work creation: [ 34.880562] kasan_save_stack+0x22/0x50 [ 34.880853] __kasan_record_aux_stack+0x8e/0xa0 [ 34.881178] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.881552] remove_vma+0x139/0x170 [ 34.881814] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.882129] do_vmi_munmap+0x1f1/0x2b0 [ 34.882409] __vm_munmap+0x138/0x3a0 [ 34.882678] __x64_sys_munmap+0x59/0x80 [ 34.882963] do_syscall_64+0x3f/0x90 [ 34.883233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.883602] [ 34.883723] The buggy address belongs to the object at ffff88800d8b7828 [ 34.883723] which belongs to the cache vm_area_struct of size 168 [ 34.884588] The buggy address is located 88 bytes inside of [ 34.884588] freed 168-byte region [ffff88800d8b7828, ffff88800d8b78d0) [ 34.885417] [ 34.885541] The buggy address belongs to the physical page: [ 34.885951] page:0000000083d4818b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8b7 [ 34.886569] memcg:ffff88801018c701 [ 34.886817] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.887183] page_type: 0xffffffff() [ 34.887438] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.887958] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801018c701 [ 34.888503] page dumped because: kasan: bad access detected [ 34.888889] [ 34.889013] Memory state around the buggy address: [ 34.889354] ffff88800d8b7780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 34.889845] ffff88800d8b7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 34.890331] >ffff88800d8b7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 34.890819] ^ [ 34.891054] ffff88800d8b7900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.891564] ffff88800d8b7980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 34.892055] ================================================================== [ 34.892625] Disabling lock debugging due to kernel taint [ 36.666577] BUG: Bad rss-counter state mm:00000000f400e535 type:MM_FILEPAGES val:33 [ 36.667818] BUG: Bad rss-counter state mm:00000000f400e535 type:MM_ANONPAGES val:22 [ 37.101063] BUG: Bad rss-counter state mm:000000006ee4ca23 type:MM_FILEPAGES val:33 [ 37.102121] BUG: Bad rss-counter state mm:000000006ee4ca23 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31581' (ECDSA) to the list of known hosts. 2023/06/19 17:51:38 fuzzer started 2023/06/19 17:51:38 dialing manager at localhost:44161 2023/06/19 17:51:38 checking machine... 2023/06/19 17:51:38 checking revisions... [ 37.846805] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:51:39 testing simple program... [ 37.891948] cgroup: Unknown subsys name 'net' [ 37.943022] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:51:35 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=000055c07967ffe0 CR3=0000000005482000 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=00007ff5e8ad451000005591c878d790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800edffe80 RCX=0000000000000001 RDX=1ffff11001dbff28 RSI=ffff88800edffe58 RDI=ffff88800edff940 RBP=0000000000000000 RSP=ffff88800edff8c8 R8 =0000000000000001 R9 =ffff88800edff978 R10=0000000000038001 R11=000000000008a6be R12=ffff88800edff998 R13=ffff88800edff980 R14=ffff88800edffe58 R15=ffff88800edff938 RIP=ffffffff81131c83 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 00007f6866b2e900 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=00007f68670e60b0 CR3=000000000e70a000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000