syzkaller login: [ 30.672440] BUG: Bad rss-counter state mm:000000003f57dc68 type:MM_FILEPAGES val:33 [ 30.674473] BUG: Bad rss-counter state mm:000000003f57dc68 type:MM_ANONPAGES val:22 [ 30.856364] ================================================================== [ 30.857368] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.858406] Read of size 8 at addr ffff88801a2fe310 by task sshd/221 [ 30.859451] [ 30.859691] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.860645] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.861734] Call Trace: [ 30.862088] [ 30.862404] dump_stack_lvl+0x91/0xf0 [ 30.862950] print_report+0xcc/0x620 [ 30.863499] ? __virt_addr_valid+0x102/0x340 [ 30.864103] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.864783] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.865468] kasan_report+0xbe/0xf0 [ 30.865989] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.866677] vma_interval_tree_remove+0xc75/0xec0 [ 30.867344] vma_prepare+0xc54/0x11a0 [ 30.867893] __split_vma+0x5af/0x950 [ 30.868411] ? __pfx___split_vma+0x10/0x10 [ 30.868998] ? find_held_lock+0x2c/0x110 [ 30.869575] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.870200] ? lock_is_held_type+0x9f/0x120 [ 30.870804] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.871483] ? mtree_range_walk+0x632/0x900 [ 30.872095] ? mas_walk+0x5c7/0x7c0 [ 30.872619] do_vmi_munmap+0x1f1/0x2b0 [ 30.873166] mmap_region+0x1f9/0x2660 [ 30.873702] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.874271] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.875062] ? __pfx_lock_acquire+0x10/0x10 [ 30.875663] ? __pfx_mmap_region+0x10/0x10 [ 30.876247] ? security_mmap_addr+0x7d/0xa0 [ 30.876832] ? get_unmapped_area+0x1f5/0x3f0 [ 30.877443] do_mmap+0x854/0xf00 [ 30.877929] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.878482] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.879098] ksys_mmap_pgoff+0x3af/0x500 [ 30.879683] do_syscall_64+0x3f/0x90 [ 30.880221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.880931] RIP: 0033:0x7f5982d02d82 [ 30.881437] 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 [ 30.883770] RSP: 002b:00007ffdc33c73d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.884677] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5982d02d82 [ 30.885525] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f598213c000 [ 30.886376] RBP: 00007f598213c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.887218] R10: 0000000000000812 R11: 0000000000000206 R12: 000056071892dec0 [ 30.888072] R13: 00007ffdc33c73f0 R14: 00007ffdc33c7420 R15: 00007ffdc33c7780 [ 30.888929] [ 30.889223] [ 30.889443] Allocated by task 214: [ 30.889872] kasan_save_stack+0x22/0x50 [ 30.890378] kasan_set_track+0x25/0x30 [ 30.890878] __kasan_slab_alloc+0x59/0x70 [ 30.891429] kmem_cache_alloc+0x16b/0x370 [ 30.891949] vm_area_dup+0x20/0x160 [ 30.892408] __split_vma+0x170/0x950 [ 30.892878] split_vma+0xc6/0x110 [ 30.893326] mprotect_fixup+0x8d2/0xb30 [ 30.893834] do_mprotect_pkey+0x87e/0xd40 [ 30.894378] __x64_sys_mprotect+0x78/0xc0 [ 30.894920] do_syscall_64+0x3f/0x90 [ 30.895423] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.896091] [ 30.896314] Freed by task 204: [ 30.896729] kasan_save_stack+0x22/0x50 [ 30.897256] kasan_set_track+0x25/0x30 [ 30.897774] kasan_save_free_info+0x2b/0x50 [ 30.898330] __kasan_slab_free+0x10a/0x190 [ 30.898890] kmem_cache_free+0x10d/0x4d0 [ 30.899426] rcu_core+0x8c8/0x2860 [ 30.899982] __do_softirq+0x1b7/0x7d4 [ 30.900481] [ 30.900707] Last potentially related work creation: [ 30.901322] kasan_save_stack+0x22/0x50 [ 30.901854] __kasan_record_aux_stack+0x8e/0xa0 [ 30.902454] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.903127] remove_vma+0x139/0x170 [ 30.903620] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.904202] do_vmi_munmap+0x1f1/0x2b0 [ 30.904799] __vm_munmap+0x138/0x3a0 [ 30.905405] __x64_sys_munmap+0x59/0x80 [ 30.906041] do_syscall_64+0x3f/0x90 [ 30.906661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.907499] [ 30.907771] The buggy address belongs to the object at ffff88801a2fe2b8 [ 30.907771] which belongs to the cache vm_area_struct of size 168 [ 30.909707] The buggy address is located 88 bytes inside of [ 30.909707] freed 168-byte region [ffff88801a2fe2b8, ffff88801a2fe360) [ 30.911564] [ 30.911846] The buggy address belongs to the physical page: [ 30.912699] page:0000000099882fa2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2fe [ 30.914128] memcg:ffff88800b9b0701 [ 30.914677] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.915520] page_type: 0xffffffff() [ 30.916111] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.917307] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b9b0701 [ 30.918493] page dumped because: kasan: bad access detected [ 30.919354] [ 30.919658] Memory state around the buggy address: [ 30.920434] ffff88801a2fe200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.921562] ffff88801a2fe280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.922685] >ffff88801a2fe300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.923801] ^ [ 30.924413] ffff88801a2fe380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.925535] ffff88801a2fe400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.926663] ================================================================== [ 30.927925] Disabling lock debugging due to kernel taint [ 33.661525] BUG: Bad rss-counter state mm:00000000078fbcd6 type:MM_FILEPAGES val:33 [ 33.663013] BUG: Bad rss-counter state mm:00000000078fbcd6 type:MM_ANONPAGES val:22 [ 34.020503] BUG: Bad rss-counter state mm:00000000daacd25d type:MM_FILEPAGES val:33 [ 34.021784] BUG: Bad rss-counter state mm:00000000daacd25d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64766' (ECDSA) to the list of known hosts. 2023/06/21 03:19:44 fuzzer started 2023/06/21 03:19:44 dialing manager at localhost:36067 2023/06/21 03:19:44 checking machine... 2023/06/21 03:19:44 checking revisions... [ 34.761734] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:19:44 testing simple program... [ 34.812478] cgroup: Unknown subsys name 'net' [ 34.856124] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:19:43 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000005 RCX=ffffffff81f75e60 RDX=ffff88800d9c8000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffffffff849c9c80 RSP=ffff88800eda7980 R8 =0000000000000001 R9 =0000000000000005 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000001 R14=0000000000000007 R15=0000000000000083 RIP=ffffffff814c027c 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 00007f44233da900 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=00007fff75af8000 CR3=000000000c5de000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007ffa70491340 CR3=000000000f1bc000 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=d49cfe2225bf7e8dd74d4327b4b853a2 XMM02=2c67c8bc2e329bc3000000000011a1c0 XMM03=fb795ef6d65770560000000000121b08 XMM04=f3096fb9de1c076400000000000ae988 XMM05=e4cb8bb95a7664b600000000001318c8 XMM06=529651173875c3180000000000130730 XMM07=e042d86d42eb936e0000000000121d88 XMM08=2b5a72db818c89ef000000000011a220 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000