syzkaller login: [ 37.429597] BUG: Bad rss-counter state mm:000000007609f2a9 type:MM_FILEPAGES val:33 [ 37.430863] BUG: Bad rss-counter state mm:000000007609f2a9 type:MM_ANONPAGES val:22 [ 37.609903] ================================================================== [ 37.610961] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.612052] Read of size 8 at addr ffff888019c94d08 by task sshd/220 [ 37.613042] [ 37.613291] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.614264] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.615390] Call Trace: [ 37.615717] [ 37.616014] dump_stack_lvl+0x91/0xf0 [ 37.616509] print_report+0xcc/0x620 [ 37.616998] ? __virt_addr_valid+0x102/0x340 [ 37.617554] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.618179] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.618804] kasan_report+0xbe/0xf0 [ 37.619287] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.619989] vma_interval_tree_remove+0xc75/0xec0 [ 37.620655] vma_prepare+0xc54/0x11a0 [ 37.621183] __split_vma+0x5af/0x950 [ 37.621705] ? __pfx___split_vma+0x10/0x10 [ 37.622291] ? find_held_lock+0x2c/0x110 [ 37.622872] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.623499] ? lock_is_held_type+0x9f/0x120 [ 37.624113] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.624782] ? mtree_range_walk+0x632/0x900 [ 37.625392] ? mas_walk+0x5c7/0x7c0 [ 37.625914] do_vmi_munmap+0x1f1/0x2b0 [ 37.626458] mmap_region+0x1f9/0x2660 [ 37.626991] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.627558] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.628354] ? __pfx_lock_acquire+0x10/0x10 [ 37.628955] ? __pfx_mmap_region+0x10/0x10 [ 37.629542] ? security_mmap_addr+0x7d/0xa0 [ 37.630130] ? get_unmapped_area+0x1f5/0x3f0 [ 37.630736] do_mmap+0x854/0xf00 [ 37.631221] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.631781] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.632411] ksys_mmap_pgoff+0x3af/0x500 [ 37.632973] do_syscall_64+0x3f/0x90 [ 37.633503] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.634219] RIP: 0033:0x7ff0a88dcd82 [ 37.634729] 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 [ 37.637113] RSP: 002b:00007fffa41bd1c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.638116] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff0a88dcd82 [ 37.639052] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff0a7d16000 [ 37.639998] RBP: 00007ff0a7d16000 R08: 0000000000000009 R09: 0000000000001000 [ 37.640928] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557b3ebe1ec0 [ 37.641865] R13: 00007fffa41bd1e0 R14: 00007fffa41bd210 R15: 00007fffa41bd570 [ 37.642815] [ 37.643135] [ 37.643372] Allocated by task 213: [ 37.643858] kasan_save_stack+0x22/0x50 [ 37.644414] kasan_set_track+0x25/0x30 [ 37.644957] __kasan_slab_alloc+0x59/0x70 [ 37.645545] kmem_cache_alloc+0x16b/0x370 [ 37.646114] vm_area_dup+0x20/0x160 [ 37.646613] __split_vma+0x170/0x950 [ 37.647127] split_vma+0xc6/0x110 [ 37.647612] mprotect_fixup+0x8d2/0xb30 [ 37.648179] do_mprotect_pkey+0x87e/0xd40 [ 37.648754] __x64_sys_mprotect+0x78/0xc0 [ 37.649333] do_syscall_64+0x3f/0x90 [ 37.649862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.650573] [ 37.650807] Freed by task 213: [ 37.651243] kasan_save_stack+0x22/0x50 [ 37.651807] kasan_set_track+0x25/0x30 [ 37.652353] kasan_save_free_info+0x2b/0x50 [ 37.652945] __kasan_slab_free+0x10a/0x190 [ 37.653531] kmem_cache_free+0x10d/0x4d0 [ 37.654163] rcu_core+0x8c8/0x2860 [ 37.654656] __do_softirq+0x1b7/0x7d4 [ 37.655179] [ 37.655414] Last potentially related work creation: [ 37.656079] kasan_save_stack+0x22/0x50 [ 37.656635] __kasan_record_aux_stack+0x8e/0xa0 [ 37.657269] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.657984] remove_vma+0x139/0x170 [ 37.658481] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.659091] do_vmi_munmap+0x1f1/0x2b0 [ 37.659632] __vm_munmap+0x138/0x3a0 [ 37.660152] __x64_sys_munmap+0x59/0x80 [ 37.660702] do_syscall_64+0x3f/0x90 [ 37.661229] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.661933] [ 37.662167] The buggy address belongs to the object at ffff888019c94cb0 [ 37.662167] which belongs to the cache vm_area_struct of size 168 [ 37.663810] The buggy address is located 88 bytes inside of [ 37.663810] freed 168-byte region [ffff888019c94cb0, ffff888019c94d58) [ 37.665360] [ 37.665596] The buggy address belongs to the physical page: [ 37.666331] page:000000008696d579 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c94 [ 37.667548] memcg:ffff8880164fd201 [ 37.668037] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.668732] page_type: 0xffffffff() [ 37.669220] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.670227] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880164fd201 [ 37.671238] page dumped because: kasan: bad access detected [ 37.671985] [ 37.672222] Memory state around the buggy address: [ 37.672873] ffff888019c94c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 37.673829] ffff888019c94c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 37.674786] >ffff888019c94d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 37.675740] ^ [ 37.676249] ffff888019c94d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 37.677209] ffff888019c94e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 37.678162] ================================================================== [ 37.679235] Disabling lock debugging due to kernel taint [ 39.686316] BUG: Bad rss-counter state mm:000000004e42fcab type:MM_FILEPAGES val:33 [ 39.687358] BUG: Bad rss-counter state mm:000000004e42fcab type:MM_ANONPAGES val:22 [ 40.142592] BUG: Bad rss-counter state mm:00000000d45860f2 type:MM_FILEPAGES val:33 [ 40.143689] BUG: Bad rss-counter state mm:00000000d45860f2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20565' (ECDSA) to the list of known hosts. 2023/06/19 12:24:17 fuzzer started 2023/06/19 12:24:17 dialing manager at localhost:44161 2023/06/19 12:24:17 checking machine... 2023/06/19 12:24:17 checking revisions... [ 40.858560] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:24:17 testing simple program... [ 40.905691] cgroup: Unknown subsys name 'net' [ 40.947592] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:24:11 Registers: info registers vcpu 0 RAX=ffffffff8609675b RBX=0000000000000002 RCX=ffffffff86096756 RDX=0000000000000002 RSI=0000000000000003 RDI=ffffffff85d91630 RBP=ffff88806ce09ad0 RSP=ffff88806ce099b8 R8 =ffffffff86096756 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffff88806ce09ab9 R15=ffff88806ce09a78 RIP=ffffffff81130a7b RFL=00000202 [-------] 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 00007fb3809a5900 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=00007fff85874000 CR3=000000000d508000 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=00007f142b535a80 CR3=000000000c9e6000 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=9a76b41d2e2d49b85e4ab78b666f5aca XMM02=2c67c8bc2e329bc30000000000121b18 XMM03=fb795ef6d65770560000000000124ba8 XMM04=0e5c87c420b2baee00000000000ae988 XMM05=023668c533bfd61800000000001354d8 XMM06=4fda316b135da52b0000000000134578 XMM07=e042d86d42eb936e0000000000124e28 XMM08=cc89676d615fab240000000000121b78 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000