syzkaller login: [ 150.382256] BUG: Bad rss-counter state mm:0000000008d1785f type:MM_FILEPAGES val:33 [ 150.383689] BUG: Bad rss-counter state mm:0000000008d1785f type:MM_ANONPAGES val:22 [ 150.422778] ================================================================== [ 150.423699] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 150.424647] Read of size 8 at addr ffff888019f7da50 by task sshd/219 [ 150.425410] [ 150.425624] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 150.426646] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 150.427620] Call Trace: [ 150.427945] [ 150.428229] dump_stack_lvl+0x91/0xf0 [ 150.428733] print_report+0xcc/0x620 [ 150.429217] ? __virt_addr_valid+0x102/0x340 [ 150.429767] ? vma_interval_tree_remove+0xc75/0xec0 [ 150.430381] ? vma_interval_tree_remove+0xc75/0xec0 [ 150.431013] kasan_report+0xbe/0xf0 [ 150.431494] ? vma_interval_tree_remove+0xc75/0xec0 [ 150.432120] vma_interval_tree_remove+0xc75/0xec0 [ 150.432753] vma_prepare+0xc54/0x11a0 [ 150.433230] __split_vma+0x5af/0x950 [ 150.433701] ? __pfx___split_vma+0x10/0x10 [ 150.434231] ? find_held_lock+0x2c/0x110 [ 150.434744] do_vmi_align_munmap+0x2ba/0x11f0 [ 150.435304] ? lock_is_held_type+0x9f/0x120 [ 150.435847] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 150.436456] ? mtree_range_walk+0x632/0x900 [ 150.437001] ? mas_walk+0x5c7/0x7c0 [ 150.437474] do_vmi_munmap+0x1f1/0x2b0 [ 150.437963] mmap_region+0x1f9/0x2660 [ 150.438441] ? vm_mmap_pgoff+0x15c/0x3a0 [ 150.438947] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 150.439653] ? __pfx_lock_acquire+0x10/0x10 [ 150.440182] ? __pfx_mmap_region+0x10/0x10 [ 150.440713] ? security_mmap_addr+0x7d/0xa0 [ 150.441238] ? get_unmapped_area+0x1f5/0x3f0 [ 150.441782] do_mmap+0x854/0xf00 [ 150.442218] vm_mmap_pgoff+0x1a6/0x3a0 [ 150.442712] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 150.443270] ksys_mmap_pgoff+0x3af/0x500 [ 150.443783] do_syscall_64+0x3f/0x90 [ 150.444258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 150.444920] RIP: 0033:0x7f04c48afd82 [ 150.445379] 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 [ 150.447487] RSP: 002b:00007ffe0058e128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 150.448392] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f04c48afd82 [ 150.449236] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f04c3ce9000 [ 150.450175] RBP: 00007f04c3ce9000 R08: 0000000000000009 R09: 0000000000001000 [ 150.451020] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b870c92ec0 [ 150.451861] R13: 00007ffe0058e140 R14: 00007ffe0058e170 R15: 00007ffe0058e4d0 [ 150.452743] [ 150.453039] [ 150.453252] Allocated by task 212: [ 150.453674] kasan_save_stack+0x22/0x50 [ 150.454173] kasan_set_track+0x25/0x30 [ 150.454662] __kasan_slab_alloc+0x59/0x70 [ 150.455186] kmem_cache_alloc+0x16b/0x370 [ 150.455718] vm_area_dup+0x20/0x160 [ 150.456177] __split_vma+0x170/0x950 [ 150.456651] split_vma+0xc6/0x110 [ 150.457109] mprotect_fixup+0x8d2/0xb30 [ 150.457612] do_mprotect_pkey+0x87e/0xd40 [ 150.458127] __x64_sys_mprotect+0x78/0xc0 [ 150.458648] do_syscall_64+0x3f/0x90 [ 150.459117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 150.459776] [ 150.459992] Freed by task 203: [ 150.460404] kasan_save_stack+0x22/0x50 [ 150.460917] kasan_set_track+0x25/0x30 [ 150.461415] kasan_save_free_info+0x2b/0x50 [ 150.461951] __kasan_slab_free+0x10a/0x190 [ 150.462480] kmem_cache_free+0x10d/0x4d0 [ 150.462981] rcu_core+0x8c8/0x2860 [ 150.463428] __do_softirq+0x1b7/0x7d4 [ 150.463908] [ 150.464119] Last potentially related work creation: [ 150.464712] kasan_save_stack+0x22/0x50 [ 150.465216] __kasan_record_aux_stack+0x8e/0xa0 [ 150.465795] __call_rcu_common.constprop.0+0x6a/0xb90 [ 150.466478] remove_vma+0x139/0x170 [ 150.466952] do_vmi_align_munmap+0xd4a/0x11f0 [ 150.467539] do_vmi_munmap+0x1f1/0x2b0 [ 150.468041] __vm_munmap+0x138/0x3a0 [ 150.468529] __x64_sys_munmap+0x59/0x80 [ 150.469043] do_syscall_64+0x3f/0x90 [ 150.469541] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 150.470225] [ 150.470453] Second to last potentially related work creation: [ 150.471189] kasan_save_stack+0x22/0x50 [ 150.471713] __kasan_record_aux_stack+0x8e/0xa0 [ 150.472328] __call_rcu_common.constprop.0+0x6a/0xb90 [ 150.473010] remove_vma+0x139/0x170 [ 150.473482] do_vmi_align_munmap+0xd4a/0x11f0 [ 150.474080] do_vmi_munmap+0x1f1/0x2b0 [ 150.474599] mmap_region+0x1f9/0x2660 [ 150.475094] do_mmap+0x854/0xf00 [ 150.475537] vm_mmap_pgoff+0x1a6/0x3a0 [ 150.476043] ksys_mmap_pgoff+0x3af/0x500 [ 150.476579] do_syscall_64+0x3f/0x90 [ 150.477075] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 150.477760] [ 150.477982] The buggy address belongs to the object at ffff888019f7d9f8 [ 150.477982] which belongs to the cache vm_area_struct of size 168 [ 150.479554] The buggy address is located 88 bytes inside of [ 150.479554] freed 168-byte region [ffff888019f7d9f8, ffff888019f7daa0) [ 150.481086] [ 150.481312] The buggy address belongs to the physical page: [ 150.482018] page:000000003c8c483c refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888019f7d000 pfn:0x19f7d [ 150.483310] memcg:ffff88800f5dea01 [ 150.483764] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 150.484509] page_type: 0xffffffff() [ 150.484986] raw: 0100000000000200 ffff88800879fc80 ffffea0000672cc0 dead000000000009 [ 150.485965] raw: ffff888019f7d000 0000000080110007 00000001ffffffff ffff88800f5dea01 [ 150.486922] page dumped because: kasan: bad access detected [ 150.487618] [ 150.487843] Memory state around the buggy address: [ 150.488452] ffff888019f7d900: fc fc fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 150.489364] ffff888019f7d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 150.490265] >ffff888019f7da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 150.491170] ^ [ 150.491919] ffff888019f7da80: fb fb fb fb fc fc fc fc fc fc fc fc fb fb fb fb [ 150.492846] ffff888019f7db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 150.493757] ================================================================== [ 150.494918] Disabling lock debugging due to kernel taint [ 152.576085] BUG: Bad rss-counter state mm:000000007716b96b type:MM_FILEPAGES val:33 [ 152.577224] BUG: Bad rss-counter state mm:000000007716b96b type:MM_ANONPAGES val:22 [ 153.158183] BUG: Bad rss-counter state mm:000000000b42d3ed type:MM_FILEPAGES val:33 [ 153.159362] BUG: Bad rss-counter state mm:000000000b42d3ed type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56847' (ECDSA) to the list of known hosts. 2023/06/20 01:17:21 fuzzer started 2023/06/20 01:17:21 dialing manager at localhost:44161 2023/06/20 01:17:21 checking machine... 2023/06/20 01:17:21 checking revisions... [ 153.875608] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:17:21 testing simple program... [ 153.936602] cgroup: Unknown subsys name 'net' [ 154.028467] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:15:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff856528e0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=00007f9270f1a20c RSP=ffff88800fc173f0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=00007f9270f1a20c R13=0000000000000000 R14=ffff88800f2d3680 R15=0000000000092cc0 RIP=ffffffff814c8416 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 00007f9270a27900 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=00007f9270fdc650 CR3=0000000019f04000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007f91e585d120 CR3=0000000019f02000 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=2030323a37313a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a37313a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000