syzkaller login: [ 38.641056] BUG: Bad rss-counter state mm:00000000abd4e1c1 type:MM_FILEPAGES val:33 [ 38.642139] BUG: Bad rss-counter state mm:00000000abd4e1c1 type:MM_ANONPAGES val:22 [ 38.811334] ================================================================== [ 38.812250] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.813195] Read of size 8 at addr ffff888014732c20 by task sshd/220 [ 38.813967] [ 38.814202] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.815135] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.816101] Call Trace: [ 38.816445] [ 38.816728] dump_stack_lvl+0x91/0xf0 [ 38.817212] print_report+0xcc/0x620 [ 38.817695] ? __virt_addr_valid+0x102/0x340 [ 38.818253] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.818868] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.819487] kasan_report+0xbe/0xf0 [ 38.819962] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.820574] vma_interval_tree_remove+0xc75/0xec0 [ 38.821170] vma_prepare+0xc54/0x11a0 [ 38.821649] __split_vma+0x5af/0x950 [ 38.822138] ? __pfx___split_vma+0x10/0x10 [ 38.822665] ? find_held_lock+0x2c/0x110 [ 38.823187] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.823751] ? lock_is_held_type+0x9f/0x120 [ 38.824284] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.824894] ? mtree_range_walk+0x632/0x900 [ 38.825444] ? mas_walk+0x5c7/0x7c0 [ 38.825911] do_vmi_munmap+0x1f1/0x2b0 [ 38.826421] mmap_region+0x1f9/0x2660 [ 38.826901] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.827419] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.828128] ? __pfx_lock_acquire+0x10/0x10 [ 38.828659] ? __pfx_mmap_region+0x10/0x10 [ 38.829183] ? security_mmap_addr+0x7d/0xa0 [ 38.829727] ? get_unmapped_area+0x1f5/0x3f0 [ 38.830335] do_mmap+0x854/0xf00 [ 38.830777] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.831276] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.831838] ksys_mmap_pgoff+0x3af/0x500 [ 38.832343] do_syscall_64+0x3f/0x90 [ 38.832820] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.833467] RIP: 0033:0x7f2b55b0fd82 [ 38.833931] 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 [ 38.836073] RSP: 002b:00007fff783a41e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.836975] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2b55b0fd82 [ 38.837821] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2b54f49000 [ 38.838670] RBP: 00007f2b54f49000 R08: 0000000000000009 R09: 0000000000001000 [ 38.839506] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a705377ec0 [ 38.840340] R13: 00007fff783a4200 R14: 00007fff783a4230 R15: 00007fff783a4590 [ 38.841205] [ 38.841496] [ 38.841709] Allocated by task 213: [ 38.842169] kasan_save_stack+0x22/0x50 [ 38.842669] kasan_set_track+0x25/0x30 [ 38.843160] __kasan_slab_alloc+0x59/0x70 [ 38.843682] kmem_cache_alloc+0x16b/0x370 [ 38.844204] vm_area_dup+0x20/0x160 [ 38.844662] __split_vma+0x170/0x950 [ 38.845125] split_vma+0xc6/0x110 [ 38.845571] mprotect_fixup+0x8d2/0xb30 [ 38.846078] do_mprotect_pkey+0x87e/0xd40 [ 38.846598] __x64_sys_mprotect+0x78/0xc0 [ 38.847126] do_syscall_64+0x3f/0x90 [ 38.847604] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.848242] [ 38.848457] Freed by task 203: [ 38.848844] kasan_save_stack+0x22/0x50 [ 38.849346] kasan_set_track+0x25/0x30 [ 38.849836] kasan_save_free_info+0x2b/0x50 [ 38.850374] __kasan_slab_free+0x10a/0x190 [ 38.850913] kmem_cache_free+0x10d/0x4d0 [ 38.851416] rcu_core+0x8c8/0x2860 [ 38.851862] __do_softirq+0x1b7/0x7d4 [ 38.852335] [ 38.852549] Last potentially related work creation: [ 38.853135] kasan_save_stack+0x22/0x50 [ 38.853639] __kasan_record_aux_stack+0x8e/0xa0 [ 38.854228] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.854878] remove_vma+0x139/0x170 [ 38.855323] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.855880] do_vmi_munmap+0x1f1/0x2b0 [ 38.856360] __vm_munmap+0x138/0x3a0 [ 38.856843] __x64_sys_munmap+0x59/0x80 [ 38.857333] do_syscall_64+0x3f/0x90 [ 38.857801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.858446] [ 38.858659] Second to last potentially related work creation: [ 38.859334] kasan_save_stack+0x22/0x50 [ 38.859845] __kasan_record_aux_stack+0x8e/0xa0 [ 38.860425] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.861062] remove_vma+0x139/0x170 [ 38.861514] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.862094] do_vmi_munmap+0x1f1/0x2b0 [ 38.862578] mmap_region+0x1f9/0x2660 [ 38.863053] do_mmap+0x854/0xf00 [ 38.863484] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.863971] ksys_mmap_pgoff+0x3af/0x500 [ 38.864468] do_syscall_64+0x3f/0x90 [ 38.864945] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.865596] [ 38.865811] The buggy address belongs to the object at ffff888014732bc8 [ 38.865811] which belongs to the cache vm_area_struct of size 168 [ 38.867348] The buggy address is located 88 bytes inside of [ 38.867348] freed 168-byte region [ffff888014732bc8, ffff888014732c70) [ 38.868816] [ 38.869038] The buggy address belongs to the physical page: [ 38.869730] page:00000000564ce0c6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14732 [ 38.870891] memcg:ffff88800c64db01 [ 38.871339] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.872076] page_type: 0xffffffff() [ 38.872548] raw: 0100000000000200 ffff88800879fc80 ffffea000035eec0 0000000000000003 [ 38.873518] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c64db01 [ 38.874496] page dumped because: kasan: bad access detected [ 38.875191] [ 38.875417] Memory state around the buggy address: [ 38.876026] ffff888014732b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.876926] ffff888014732b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.877823] >ffff888014732c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.878726] ^ [ 38.879284] ffff888014732c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 38.880196] ffff888014732d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 38.881090] ================================================================== [ 38.882215] Disabling lock debugging due to kernel taint [ 40.809863] BUG: Bad rss-counter state mm:000000008381a990 type:MM_FILEPAGES val:33 [ 40.810925] BUG: Bad rss-counter state mm:000000008381a990 type:MM_ANONPAGES val:22 [ 41.411737] BUG: Bad rss-counter state mm:0000000015dc5e2f type:MM_FILEPAGES val:33 [ 41.412946] BUG: Bad rss-counter state mm:0000000015dc5e2f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57026' (ECDSA) to the list of known hosts. 2023/06/19 15:26:18 fuzzer started 2023/06/19 15:26:18 dialing manager at localhost:44161 2023/06/19 15:26:18 checking machine... 2023/06/19 15:26:18 checking revisions... [ 42.030761] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:26:18 testing simple program... [ 42.082777] cgroup: Unknown subsys name 'net' [ 42.122538] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:26:11 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000200000 RCX=ffffffff818a34e5 RDX=ffff88800e40d1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=000000039fc0c3b8 RSP=ffff88801905f988 R8 =0000000000000005 R9 =0000000000200000 R10=0000000000200000 R11=0000000000000001 R12=ffff88801905fb5c R13=e2f55236f51925a6 R14=ffff88801905fb20 R15=ffff88800f3d2dc5 RIP=ffffffff814c01e1 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 00007f5822c60900 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=00007f5823215650 CR3=000000000f648000 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=ffff888008c58400 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=00007ffc97f75ba8 CR3=0000000016526000 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=2038313a36323a3531203931206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a36323a3531203931 XMM08=00007f312c0312000000006700000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000