syzkaller login: [ 29.432209] BUG: Bad rss-counter state mm:00000000e47814e0 type:MM_FILEPAGES val:33 [ 29.433576] BUG: Bad rss-counter state mm:00000000e47814e0 type:MM_ANONPAGES val:22 [ 29.593894] ================================================================== [ 29.594828] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.595895] Read of size 8 at addr ffff88800e406d08 by task sshd/218 [ 29.596672] [ 29.596891] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.597780] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.598756] Call Trace: [ 29.599098] [ 29.599410] dump_stack_lvl+0x91/0xf0 [ 29.599902] print_report+0xcc/0x620 [ 29.600399] ? __virt_addr_valid+0x102/0x340 [ 29.600954] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.601583] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.602210] kasan_report+0xbe/0xf0 [ 29.602679] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.603337] vma_interval_tree_remove+0xc75/0xec0 [ 29.603940] vma_prepare+0xc54/0x11a0 [ 29.604429] __split_vma+0x5af/0x950 [ 29.604899] ? __pfx___split_vma+0x10/0x10 [ 29.605438] ? find_held_lock+0x2c/0x110 [ 29.605953] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.606534] ? lock_is_held_type+0x9f/0x120 [ 29.607091] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.607713] ? mtree_range_walk+0x632/0x900 [ 29.608278] ? mas_walk+0x5c7/0x7c0 [ 29.608749] do_vmi_munmap+0x1f1/0x2b0 [ 29.609252] mmap_region+0x1f9/0x2660 [ 29.609730] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.610267] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.610985] ? __pfx_lock_acquire+0x10/0x10 [ 29.611544] ? __pfx_mmap_region+0x10/0x10 [ 29.612072] ? security_mmap_addr+0x7d/0xa0 [ 29.612610] ? get_unmapped_area+0x1f5/0x3f0 [ 29.613172] do_mmap+0x854/0xf00 [ 29.613612] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.614101] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.614669] ksys_mmap_pgoff+0x3af/0x500 [ 29.615208] do_syscall_64+0x3f/0x90 [ 29.615691] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.616343] RIP: 0033:0x7faf72070d82 [ 29.616800] 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 [ 29.618971] RSP: 002b:00007fff1d8e2af8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.619901] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faf72070d82 [ 29.620770] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faf714aa000 [ 29.621626] RBP: 00007faf714aa000 R08: 0000000000000009 R09: 0000000000001000 [ 29.622484] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558aef035ec0 [ 29.623360] R13: 00007fff1d8e2b10 R14: 00007fff1d8e2b40 R15: 00007fff1d8e2ea0 [ 29.624229] [ 29.624519] [ 29.624732] Allocated by task 211: [ 29.625176] kasan_save_stack+0x22/0x50 [ 29.625678] kasan_set_track+0x25/0x30 [ 29.626181] __kasan_slab_alloc+0x59/0x70 [ 29.626720] kmem_cache_alloc+0x16b/0x370 [ 29.627300] vm_area_dup+0x20/0x160 [ 29.627755] __split_vma+0x170/0x950 [ 29.628236] split_vma+0xc6/0x110 [ 29.628674] mprotect_fixup+0x8d2/0xb30 [ 29.629193] do_mprotect_pkey+0x87e/0xd40 [ 29.629711] __x64_sys_mprotect+0x78/0xc0 [ 29.630253] do_syscall_64+0x3f/0x90 [ 29.630728] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.631410] [ 29.631626] Freed by task 19: [ 29.632011] kasan_save_stack+0x22/0x50 [ 29.632523] kasan_set_track+0x25/0x30 [ 29.633030] kasan_save_free_info+0x2b/0x50 [ 29.633572] __kasan_slab_free+0x10a/0x190 [ 29.634101] kmem_cache_free+0x10d/0x4d0 [ 29.634617] rcu_core+0x8c8/0x2860 [ 29.635066] __do_softirq+0x1b7/0x7d4 [ 29.635569] [ 29.635786] Last potentially related work creation: [ 29.636382] kasan_save_stack+0x22/0x50 [ 29.636887] __kasan_record_aux_stack+0x8e/0xa0 [ 29.637472] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.638115] remove_vma+0x139/0x170 [ 29.638577] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.639172] do_vmi_munmap+0x1f1/0x2b0 [ 29.639671] __vm_munmap+0x138/0x3a0 [ 29.640136] __x64_sys_munmap+0x59/0x80 [ 29.640645] do_syscall_64+0x3f/0x90 [ 29.641118] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.641769] [ 29.641985] Second to last potentially related work creation: [ 29.642704] kasan_save_stack+0x22/0x50 [ 29.643276] __kasan_record_aux_stack+0x8e/0xa0 [ 29.643871] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.644552] remove_vma+0x139/0x170 [ 29.645021] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.645624] do_vmi_munmap+0x1f1/0x2b0 [ 29.646130] mmap_region+0x1f9/0x2660 [ 29.646622] do_mmap+0x854/0xf00 [ 29.647078] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.647596] ksys_mmap_pgoff+0x7d/0x500 [ 29.648090] do_syscall_64+0x3f/0x90 [ 29.648571] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.649221] [ 29.649435] The buggy address belongs to the object at ffff88800e406cb0 [ 29.649435] which belongs to the cache vm_area_struct of size 168 [ 29.650918] The buggy address is located 88 bytes inside of [ 29.650918] freed 168-byte region [ffff88800e406cb0, ffff88800e406d58) [ 29.652791] [ 29.653078] The buggy address belongs to the physical page: [ 29.653947] page:00000000dfb538ca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe406 [ 29.655424] memcg:ffff88800e666d01 [ 29.655885] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.656620] page_type: 0xffffffff() [ 29.657076] raw: 0100000000000200 ffff88800879fc80 ffffea000038e640 dead000000000003 [ 29.658004] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e666d01 [ 29.658922] page dumped because: kasan: bad access detected [ 29.659595] [ 29.659929] Memory state around the buggy address: [ 29.660538] ffff88800e406c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 29.661404] ffff88800e406c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 29.662275] >ffff88800e406d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 29.663157] ^ [ 29.663601] ffff88800e406d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.664485] ffff88800e406e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 29.665534] ================================================================== [ 29.666642] Disabling lock debugging due to kernel taint [ 32.093291] BUG: Bad rss-counter state mm:0000000018c60634 type:MM_FILEPAGES val:33 [ 32.094459] BUG: Bad rss-counter state mm:0000000018c60634 type:MM_ANONPAGES val:22 [ 32.682513] BUG: Bad rss-counter state mm:00000000e0038232 type:MM_FILEPAGES val:33 [ 32.683758] BUG: Bad rss-counter state mm:00000000e0038232 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4046' (ECDSA) to the list of known hosts. 2023/06/20 04:07:13 fuzzer started 2023/06/20 04:07:14 dialing manager at localhost:44161 2023/06/20 04:07:14 checking machine... 2023/06/20 04:07:14 checking revisions... [ 33.335350] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:07:14 testing simple program... [ 33.383709] cgroup: Unknown subsys name 'net' [ 33.426646] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:07:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800c955000 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800c955148 RBP=ffff88800c955140 RSP=ffff888014357c78 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000008 R13=0000000000000001 R14=dffffc0000000000 R15=00000000ffffffea RIP=ffffffff81534214 RFL=00000046 [---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 00007f8902c7c900 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=00007f89020a5960 CR3=000000000f6c2000 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=1a286d0db9195296df4bc895cf5a3cdf XMM02=ec2efd57dc4c00df000000000011dd98 XMM03=c85912a264e762ff000000000011de68 XMM04=aa5fa5b15bf0c4a400000000000ae988 XMM05=c6424921167ab2470000000000136c38 XMM06=87f1ec3a3b7c959e00000000001359d8 XMM07=fb795ef6d657705600000000001243c0 XMM08=2c67c8bc2e329bc3000000000011de08 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09b60 RCX=0000000000000001 RDX=1ffff1100d9e1380 RSI=ffffffff84531da7 RDI=ffff88806cf09b6c RBP=ffff88806cf09c00 RSP=ffff88806cf09a78 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000fdc6 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff88800fa251c0 R15=ffff88801a67b730 RIP=ffffffff813ad4f7 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 00007facd4536900 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=00007fffb9c17000 CR3=000000000ecba000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000