syzkaller login: [ 30.264120] BUG: Bad rss-counter state mm:000000008bae2ede type:MM_FILEPAGES val:33 [ 30.264827] BUG: Bad rss-counter state mm:000000008bae2ede type:MM_ANONPAGES val:22 [ 30.444232] ================================================================== [ 30.444832] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.446587] Read of size 8 at addr ffff88800e2dc880 by task sshd/223 [ 30.447234] [ 30.447378] CPU: 0 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.447958] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.448702] Call Trace: [ 30.448921] [ 30.449255] dump_stack_lvl+0x91/0xf0 [ 30.449577] print_report+0xcc/0x620 [ 30.449897] ? __virt_addr_valid+0x102/0x340 [ 30.450432] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.450835] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.451355] kasan_report+0xbe/0xf0 [ 30.451663] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.452329] vma_interval_tree_remove+0xc75/0xec0 [ 30.452716] vma_prepare+0xc54/0x11a0 [ 30.453189] __split_vma+0x5af/0x950 [ 30.453505] ? __pfx___split_vma+0x10/0x10 [ 30.453897] ? find_held_lock+0x2c/0x110 [ 30.454355] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.454759] ? lock_is_held_type+0x9f/0x120 [ 30.455296] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.455692] ? mtree_range_walk+0x632/0x900 [ 30.456252] ? mas_walk+0x5c7/0x7c0 [ 30.456562] do_vmi_munmap+0x1f1/0x2b0 [ 30.457002] mmap_region+0x1f9/0x2660 [ 30.457398] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.457809] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.458429] ? __pfx_lock_acquire+0x10/0x10 [ 30.458870] ? __pfx_mmap_region+0x10/0x10 [ 30.459299] ? security_mmap_addr+0x7d/0xa0 [ 30.459678] ? get_unmapped_area+0x1f5/0x3f0 [ 30.460246] do_mmap+0x854/0xf00 [ 30.460531] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.460939] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.461388] ksys_mmap_pgoff+0x3af/0x500 [ 30.461712] do_syscall_64+0x3f/0x90 [ 30.462227] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.462658] RIP: 0033:0x7f6df47aad82 [ 30.463019] 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 [ 30.464621] RSP: 002b:00007ffc4d6ff408 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.465363] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6df47aad82 [ 30.465978] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6df3be4000 [ 30.466695] RBP: 00007f6df3be4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.467375] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f258dc2f60 [ 30.468003] R13: 00007ffc4d6ff420 R14: 00007ffc4d6ff450 R15: 00007ffc4d6ff7b0 [ 30.468556] [ 30.468755] [ 30.468966] Allocated by task 214: [ 30.469246] kasan_save_stack+0x22/0x50 [ 30.469571] kasan_set_track+0x25/0x30 [ 30.469948] __kasan_slab_alloc+0x59/0x70 [ 30.470290] kmem_cache_alloc+0x16b/0x370 [ 30.470632] vm_area_dup+0x20/0x160 [ 30.471055] __split_vma+0x170/0x950 [ 30.471359] split_vma+0xc6/0x110 [ 30.471647] mprotect_fixup+0x8d2/0xb30 [ 30.472062] do_mprotect_pkey+0x87e/0xd40 [ 30.472377] __x64_sys_mprotect+0x78/0xc0 [ 30.472694] do_syscall_64+0x3f/0x90 [ 30.473059] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.473453] [ 30.473589] Freed by task 211: [ 30.473931] kasan_save_stack+0x22/0x50 [ 30.474258] kasan_set_track+0x25/0x30 [ 30.474580] kasan_save_free_info+0x2b/0x50 [ 30.474984] __kasan_slab_free+0x10a/0x190 [ 30.475324] kmem_cache_free+0x10d/0x4d0 [ 30.475651] rcu_core+0x8c8/0x2860 [ 30.476051] __do_softirq+0x1b7/0x7d4 [ 30.476368] [ 30.476508] Last potentially related work creation: [ 30.477026] kasan_save_stack+0x22/0x50 [ 30.477359] __kasan_record_aux_stack+0x8e/0xa0 [ 30.477754] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.478242] remove_vma+0x139/0x170 [ 30.478537] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.478969] do_vmi_munmap+0x1f1/0x2b0 [ 30.479287] __vm_munmap+0x138/0x3a0 [ 30.479590] __x64_sys_munmap+0x59/0x80 [ 30.480056] do_syscall_64+0x3f/0x90 [ 30.480372] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.480883] [ 30.481019] Second to last potentially related work creation: [ 30.481456] kasan_save_stack+0x22/0x50 [ 30.481887] __kasan_record_aux_stack+0x8e/0xa0 [ 30.482265] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.482714] remove_vma+0x139/0x170 [ 30.483135] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.483500] do_vmi_munmap+0x1f1/0x2b0 [ 30.483882] mmap_region+0x1f9/0x2660 [ 30.484220] do_mmap+0x854/0xf00 [ 30.484506] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.484899] ksys_mmap_pgoff+0x3af/0x500 [ 30.485226] do_syscall_64+0x3f/0x90 [ 30.485533] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.486040] [ 30.486181] The buggy address belongs to the object at ffff88800e2dc828 [ 30.486181] which belongs to the cache vm_area_struct of size 168 [ 30.487172] The buggy address is located 88 bytes inside of [ 30.487172] freed 168-byte region [ffff88800e2dc828, ffff88800e2dc8d0) [ 30.488199] [ 30.488339] The buggy address belongs to the physical page: [ 30.488761] page:00000000c4b23efc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2dc [ 30.489608] memcg:ffff88800ea68801 [ 30.489960] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.490433] page_type: 0xffffffff() [ 30.490724] raw: 0100000000000200 ffff8880087a0c80 ffffea0000374300 dead000000000005 [ 30.491377] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea68801 [ 30.492022] page dumped because: kasan: bad access detected [ 30.492450] [ 30.492592] Memory state around the buggy address: [ 30.493088] ffff88800e2dc780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.493658] ffff88800e2dc800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.494259] >ffff88800e2dc880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.494887] ^ [ 30.495152] ffff88800e2dc900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.495726] ffff88800e2dc980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.496343] ================================================================== [ 30.512184] Disabling lock debugging due to kernel taint [ 35.510428] BUG: Bad rss-counter state mm:0000000098dcf35a type:MM_FILEPAGES val:33 [ 35.511092] BUG: Bad rss-counter state mm:0000000098dcf35a type:MM_ANONPAGES val:22 [ 36.979639] BUG: Bad rss-counter state mm:000000009f38f69c type:MM_FILEPAGES val:33 [ 36.982145] BUG: Bad rss-counter state mm:000000009f38f69c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45902' (ECDSA) to the list of known hosts. 2023/06/21 10:08:29 fuzzer started 2023/06/21 10:08:29 dialing manager at localhost:36067 2023/06/21 10:08:29 checking machine... 2023/06/21 10:08:29 checking revisions... [ 37.809592] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:08:29 testing simple program... [ 37.853091] cgroup: Unknown subsys name 'net' [ 37.919363] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:08:29 Registers: info registers vcpu 0 RAX=ffff88800e883260 RBX=00000000000000f0 RCX=ffff88806c8b0620 RDX=0000000000000000 RSI=ffffffff846000aa RDI=ffff88800e883260 RBP=ffff888016a87cd8 RSP=ffff888016a87c90 R8 =000000003f459dff R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800844f780 R13=0000000000000000 R14=0000000000000000 R15=0000000000092cc0 RIP=ffffffff81808063 RFL=00000282 [--S----] 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 00007f521c5ef900 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=00007f521c5ef6f8 CR3=0000000019f4a000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11001e860e6 RSI=ffffffff82050925 RDI=ffff88800f430730 RBP=ffff88800b331000 RSP=ffff8880146970f8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800f430000 R13=ffff888008ea5c10 R14=ffff88800b331148 R15=ffff88800b333800 RIP=ffffffff8205096b 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 00007fdf69aab700 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=00007ff730e29328 CR3=000000000cd1e000 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=2038323a38303a3031203132206e754a XMM01=5d3534313238392e36332020205b203a XMM02=415f4d4d3a6570797420633936663833 XMM03=617473207265746e756f632d73737220 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a38303a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000