syzkaller login: [ 28.874508] BUG: Bad rss-counter state mm:0000000082c34d27 type:MM_FILEPAGES val:33 [ 28.875745] BUG: Bad rss-counter state mm:0000000082c34d27 type:MM_ANONPAGES val:22 [ 28.923959] ================================================================== [ 28.924873] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.925816] Read of size 8 at addr ffff88800f0dba50 by task sshd/221 [ 28.926763] [ 28.926981] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.927855] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.928877] Call Trace: [ 28.929196] [ 28.929477] dump_stack_lvl+0x91/0xf0 [ 28.929983] print_report+0xcc/0x620 [ 28.930474] ? __virt_addr_valid+0x102/0x340 [ 28.931040] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.931651] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.932289] kasan_report+0xbe/0xf0 [ 28.932772] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.933390] vma_interval_tree_remove+0xc75/0xec0 [ 28.933993] vma_prepare+0xc54/0x11a0 [ 28.934478] __split_vma+0x5af/0x950 [ 28.934959] ? __pfx___split_vma+0x10/0x10 [ 28.935487] ? find_held_lock+0x2c/0x110 [ 28.936021] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.936605] ? lock_is_held_type+0x9f/0x120 [ 28.937142] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.937751] ? mtree_range_walk+0x632/0x900 [ 28.938301] ? mas_walk+0x5c7/0x7c0 [ 28.938784] do_vmi_munmap+0x1f1/0x2b0 [ 28.939288] mmap_region+0x1f9/0x2660 [ 28.939774] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.940299] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.941017] ? __pfx_lock_acquire+0x10/0x10 [ 28.941559] ? __pfx_mmap_region+0x10/0x10 [ 28.942094] ? security_mmap_addr+0x7d/0xa0 [ 28.942631] ? get_unmapped_area+0x1f5/0x3f0 [ 28.943177] do_mmap+0x854/0xf00 [ 28.943612] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.944134] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.944696] ksys_mmap_pgoff+0x3af/0x500 [ 28.945201] do_syscall_64+0x3f/0x90 [ 28.945688] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.946336] RIP: 0033:0x7f14649f6d82 [ 28.946793] 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 [ 28.948935] RSP: 002b:00007ffc4f6c0c48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.949848] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f14649f6d82 [ 28.950694] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1463e30000 [ 28.951534] RBP: 00007f1463e30000 R08: 0000000000000009 R09: 0000000000001000 [ 28.952402] R10: 0000000000000812 R11: 0000000000000206 R12: 000056479a038f70 [ 28.953242] R13: 00007ffc4f6c0c60 R14: 00007ffc4f6c0c90 R15: 00007ffc4f6c0ff0 [ 28.954096] [ 28.954396] [ 28.954617] Allocated by task 213: [ 28.955041] kasan_save_stack+0x22/0x50 [ 28.955544] kasan_set_track+0x25/0x30 [ 28.956054] __kasan_slab_alloc+0x59/0x70 [ 28.956585] kmem_cache_alloc+0x16b/0x370 [ 28.957098] vm_area_dup+0x20/0x160 [ 28.957564] __split_vma+0x170/0x950 [ 28.958032] split_vma+0xc6/0x110 [ 28.958482] mprotect_fixup+0x8d2/0xb30 [ 28.958987] do_mprotect_pkey+0x87e/0xd40 [ 28.959514] __x64_sys_mprotect+0x78/0xc0 [ 28.960092] do_syscall_64+0x3f/0x90 [ 28.960650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.961294] [ 28.961511] Freed by task 213: [ 28.961910] kasan_save_stack+0x22/0x50 [ 28.962411] kasan_set_track+0x25/0x30 [ 28.962905] kasan_save_free_info+0x2b/0x50 [ 28.963439] __kasan_slab_free+0x10a/0x190 [ 28.963994] kmem_cache_free+0x10d/0x4d0 [ 28.964500] rcu_core+0x8c8/0x2860 [ 28.964948] __do_softirq+0x1b7/0x7d4 [ 28.965456] [ 28.965675] Last potentially related work creation: [ 28.966268] kasan_save_stack+0x22/0x50 [ 28.966778] __kasan_record_aux_stack+0x8e/0xa0 [ 28.967352] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.968005] remove_vma+0x139/0x170 [ 28.968462] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.969026] do_vmi_munmap+0x1f1/0x2b0 [ 28.969521] __vm_munmap+0x138/0x3a0 [ 28.969990] __x64_sys_munmap+0x59/0x80 [ 28.970486] do_syscall_64+0x3f/0x90 [ 28.970964] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.971617] [ 28.971834] The buggy address belongs to the object at ffff88800f0db9f8 [ 28.971834] which belongs to the cache vm_area_struct of size 168 [ 28.973328] The buggy address is located 88 bytes inside of [ 28.973328] freed 168-byte region [ffff88800f0db9f8, ffff88800f0dbaa0) [ 28.974741] [ 28.974959] The buggy address belongs to the physical page: [ 28.975620] page:000000006d384e7d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0db [ 28.976722] memcg:ffff88800d79ee01 [ 28.977151] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.977806] page_type: 0xffffffff() [ 28.978263] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 28.979183] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d79ee01 [ 28.980094] page dumped because: kasan: bad access detected [ 28.980756] [ 28.980972] Memory state around the buggy address: [ 28.981546] ffff88800f0db900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.982404] ffff88800f0db980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 28.983268] >ffff88800f0dba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.984143] ^ [ 28.984858] ffff88800f0dba80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 28.985725] ffff88800f0dbb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.986582] ================================================================== [ 28.987520] Disabling lock debugging due to kernel taint [ 31.603816] BUG: Bad rss-counter state mm:00000000ff4eeb59 type:MM_FILEPAGES val:33 [ 31.605002] BUG: Bad rss-counter state mm:00000000ff4eeb59 type:MM_ANONPAGES val:22 [ 31.945561] BUG: Bad rss-counter state mm:00000000829f6812 type:MM_FILEPAGES val:33 [ 31.946317] BUG: Bad rss-counter state mm:00000000829f6812 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18807' (ECDSA) to the list of known hosts. 2023/06/20 18:41:26 fuzzer started 2023/06/20 18:41:26 dialing manager at localhost:36067 2023/06/20 18:41:26 checking machine... 2023/06/20 18:41:26 checking revisions... [ 32.620117] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:41:26 testing simple program... [ 32.667885] cgroup: Unknown subsys name 'net' [ 32.723468] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:41:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f66c5bcdf00 RCX=0000000000000000 RDX=ffff88800fbd8000 RSI=ffffffff813a0b26 RDI=0000000000000001 RBP=ffffffffffffffff RSP=ffff888015ee7728 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88800fbd8000 R15=ffff88800e33f390 RIP=ffffffff814c089b 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 00007f66c56e6900 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=00007f66c5c9e0b0 CR3=000000000e4f0000 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=dffffc0000000000 RBX=ffff88806cf09a78 RCX=0000000000000001 RDX=1ffff1100d9e1350 RSI=ffff888008e07e78 RDI=ffff88806cf09a80 RBP=ffff888008e07e78 RSP=ffff88806cf099d0 R8 =ffffffff864b381e R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000b547f R12=0000000000000008 R13=ffff88806cf09ac0 R14=ffff888008e07e80 R15=ffff88806cf09a78 RIP=ffffffff81130445 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 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=00007f165b37a780 CR3=000000000c436000 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=04004602b075b28dd942bfafde9f790e XMM02=ec2efd57dc4c00df000000000011a498 XMM03=463f13da4da9ff3b000000000011a568 XMM04=65f2391f7bf1919400000000000ae988 XMM05=e4cb8bb95a7664b60000000000131858 XMM06=ca69255e4d360b9400000000001306c0 XMM07=e042d86d42eb936e0000000000121530 XMM08=463f13da4da9ff3b000000000011a568 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000