syzkaller login: [ 38.776198] BUG: Bad rss-counter state mm:00000000fd4dec3c type:MM_FILEPAGES val:33 [ 38.777377] BUG: Bad rss-counter state mm:00000000fd4dec3c type:MM_ANONPAGES val:22 [ 38.821956] ================================================================== [ 38.823028] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.824040] Read of size 8 at addr ffff88800dc16ed8 by task sshd/220 [ 38.824885] [ 38.825117] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.826036] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.827098] Call Trace: [ 38.827438] [ 38.827741] dump_stack_lvl+0x91/0xf0 [ 38.828278] print_report+0xcc/0x620 [ 38.828797] ? __virt_addr_valid+0x102/0x340 [ 38.829399] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.830065] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.830757] kasan_report+0xbe/0xf0 [ 38.831267] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.831931] vma_interval_tree_remove+0xc75/0xec0 [ 38.832578] vma_prepare+0xc54/0x11a0 [ 38.833090] __split_vma+0x5af/0x950 [ 38.833592] ? __pfx___split_vma+0x10/0x10 [ 38.834173] ? find_held_lock+0x2c/0x110 [ 38.834734] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.835340] ? lock_is_held_type+0x9f/0x120 [ 38.835920] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.836567] ? mtree_range_walk+0x632/0x900 [ 38.837157] ? mas_walk+0x5c7/0x7c0 [ 38.837671] do_vmi_munmap+0x1f1/0x2b0 [ 38.838218] mmap_region+0x1f9/0x2660 [ 38.838747] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.839290] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.840046] ? __pfx_lock_acquire+0x10/0x10 [ 38.840617] ? __pfx_mmap_region+0x10/0x10 [ 38.841192] ? security_mmap_addr+0x7d/0xa0 [ 38.841762] ? get_unmapped_area+0x1f5/0x3f0 [ 38.842363] do_mmap+0x854/0xf00 [ 38.842833] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.843362] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.843957] ksys_mmap_pgoff+0x3af/0x500 [ 38.844518] do_syscall_64+0x3f/0x90 [ 38.845039] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.845724] RIP: 0033:0x7ff410fa9d82 [ 38.846227] 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 [ 38.848516] RSP: 002b:00007ffc4631d678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.849475] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff410fa9d82 [ 38.850385] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff4103e3000 [ 38.851285] RBP: 00007ff4103e3000 R08: 0000000000000009 R09: 0000000000001000 [ 38.852189] R10: 0000000000000812 R11: 0000000000000206 R12: 000055809ad22f70 [ 38.853101] R13: 00007ffc4631d690 R14: 00007ffc4631d6c0 R15: 00007ffc4631da20 [ 38.854015] [ 38.854336] [ 38.854567] Allocated by task 213: [ 38.855027] kasan_save_stack+0x22/0x50 [ 38.855562] kasan_set_track+0x25/0x30 [ 38.856104] __kasan_slab_alloc+0x59/0x70 [ 38.856668] kmem_cache_alloc+0x16b/0x370 [ 38.857220] vm_area_dup+0x20/0x160 [ 38.857714] __split_vma+0x170/0x950 [ 38.858225] split_vma+0xc6/0x110 [ 38.858696] mprotect_fixup+0x8d2/0xb30 [ 38.859234] do_mprotect_pkey+0x87e/0xd40 [ 38.859792] __x64_sys_mprotect+0x78/0xc0 [ 38.860349] do_syscall_64+0x3f/0x90 [ 38.860857] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.861546] [ 38.861775] Freed by task 213: [ 38.862200] kasan_save_stack+0x22/0x50 [ 38.862738] kasan_set_track+0x25/0x30 [ 38.863267] kasan_save_free_info+0x2b/0x50 [ 38.863834] __kasan_slab_free+0x10a/0x190 [ 38.864401] kmem_cache_free+0x10d/0x4d0 [ 38.864939] rcu_core+0x8c8/0x2860 [ 38.865409] __do_softirq+0x1b7/0x7d4 [ 38.865921] [ 38.866166] Last potentially related work creation: [ 38.866788] kasan_save_stack+0x22/0x50 [ 38.867326] __kasan_record_aux_stack+0x8e/0xa0 [ 38.867940] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.868631] remove_vma+0x139/0x170 [ 38.869110] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.869710] do_vmi_munmap+0x1f1/0x2b0 [ 38.870241] __vm_munmap+0x138/0x3a0 [ 38.870739] __x64_sys_munmap+0x59/0x80 [ 38.871268] do_syscall_64+0x3f/0x90 [ 38.871772] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.872459] [ 38.872687] The buggy address belongs to the object at ffff88800dc16e80 [ 38.872687] which belongs to the cache vm_area_struct of size 168 [ 38.874275] The buggy address is located 88 bytes inside of [ 38.874275] freed 168-byte region [ffff88800dc16e80, ffff88800dc16f28) [ 38.875776] [ 38.876007] The buggy address belongs to the physical page: [ 38.876712] page:00000000b66d2698 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc16 [ 38.877867] memcg:ffff888009e30201 [ 38.878322] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.879016] page_type: 0xffffffff() [ 38.879492] raw: 0100000000000200 ffff8880087a0c80 ffffea0000684100 dead000000000002 [ 38.880476] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009e30201 [ 38.881448] page dumped because: kasan: bad access detected [ 38.882167] [ 38.882401] Memory state around the buggy address: [ 38.883026] ffff88800dc16d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.883937] ffff88800dc16e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.884867] >ffff88800dc16e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.885789] ^ [ 38.886570] ffff88800dc16f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.887494] ffff88800dc16f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.888413] ================================================================== [ 38.889503] Disabling lock debugging due to kernel taint [ 40.886611] BUG: Bad rss-counter state mm:0000000081a71a85 type:MM_FILEPAGES val:33 [ 40.887782] BUG: Bad rss-counter state mm:0000000081a71a85 type:MM_ANONPAGES val:22 [ 41.387879] BUG: Bad rss-counter state mm:0000000086f3827a type:MM_FILEPAGES val:33 [ 41.389019] BUG: Bad rss-counter state mm:0000000086f3827a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1777' (ECDSA) to the list of known hosts. 2023/06/20 12:10:30 fuzzer started 2023/06/20 12:10:30 dialing manager at localhost:36067 2023/06/20 12:10:30 checking machine... 2023/06/20 12:10:30 checking revisions... [ 42.173315] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:10:30 testing simple program... [ 42.225162] cgroup: Unknown subsys name 'net' [ 42.276947] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:10:30 Registers: info registers vcpu 0 RAX=ffffed100d9c13a4 RBX=1ffff1100d9c13a4 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff88806ce09d10 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8ecd 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 00007f5d9071a900 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=00007fc539d5e390 CR3=0000000015e02000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f5d90ccf650 CR3=000000000f1ec000 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=2039323a30313a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a30313a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000