syzkaller login: [ 31.278149] BUG: Bad rss-counter state mm:0000000051875147 type:MM_FILEPAGES val:33 [ 31.279325] BUG: Bad rss-counter state mm:0000000051875147 type:MM_ANONPAGES val:22 [ 31.464497] ================================================================== [ 31.465701] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.466901] Read of size 8 at addr ffff88801a97ab38 by task sshd/220 [ 31.467772] [ 31.468019] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.469017] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.470493] Call Trace: [ 31.470976] [ 31.471410] dump_stack_lvl+0x91/0xf0 [ 31.472150] print_report+0xcc/0x620 [ 31.472873] ? __virt_addr_valid+0x102/0x340 [ 31.473688] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.474599] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.475509] kasan_report+0xbe/0xf0 [ 31.476235] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.477140] vma_interval_tree_remove+0xc75/0xec0 [ 31.478000] vma_prepare+0xc54/0x11a0 [ 31.478678] __split_vma+0x5af/0x950 [ 31.479345] ? __pfx___split_vma+0x10/0x10 [ 31.480076] ? find_held_lock+0x2c/0x110 [ 31.480794] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.481583] ? lock_is_held_type+0x9f/0x120 [ 31.482315] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.483138] ? mtree_range_walk+0x632/0x900 [ 31.483895] ? mas_walk+0x5c7/0x7c0 [ 31.484547] do_vmi_munmap+0x1f1/0x2b0 [ 31.485226] mmap_region+0x1f9/0x2660 [ 31.485902] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.486627] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.487619] ? __pfx_lock_acquire+0x10/0x10 [ 31.488351] ? __pfx_mmap_region+0x10/0x10 [ 31.489117] ? security_mmap_addr+0x7d/0xa0 [ 31.489863] ? get_unmapped_area+0x1f5/0x3f0 [ 31.490629] do_mmap+0x854/0xf00 [ 31.491239] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.491929] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.492708] ksys_mmap_pgoff+0x3af/0x500 [ 31.493362] do_syscall_64+0x3f/0x90 [ 31.493871] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.494556] RIP: 0033:0x7f65dedd7d82 [ 31.495038] 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 [ 31.497263] RSP: 002b:00007ffd9f2d7748 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.498211] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f65dedd7d82 [ 31.499093] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f65de211000 [ 31.499976] RBP: 00007f65de211000 R08: 0000000000000009 R09: 0000000000001000 [ 31.500860] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561ef2d8db20 [ 31.501764] R13: 00007ffd9f2d7760 R14: 00007ffd9f2d7790 R15: 00007ffd9f2d7af0 [ 31.502661] [ 31.502971] [ 31.503199] Allocated by task 213: [ 31.503650] kasan_save_stack+0x22/0x50 [ 31.504181] kasan_set_track+0x25/0x30 [ 31.504704] __kasan_slab_alloc+0x59/0x70 [ 31.505263] kmem_cache_alloc+0x16b/0x370 [ 31.505808] vm_area_dup+0x20/0x160 [ 31.506288] __split_vma+0x170/0x950 [ 31.506777] split_vma+0xc6/0x110 [ 31.507238] mprotect_fixup+0x8d2/0xb30 [ 31.507838] do_mprotect_pkey+0x87e/0xd40 [ 31.508384] __x64_sys_mprotect+0x78/0xc0 [ 31.508932] do_syscall_64+0x3f/0x90 [ 31.509463] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.510135] [ 31.510361] Freed by task 213: [ 31.510774] kasan_save_stack+0x22/0x50 [ 31.511298] kasan_set_track+0x25/0x30 [ 31.511820] kasan_save_free_info+0x2b/0x50 [ 31.512380] __kasan_slab_free+0x10a/0x190 [ 31.512938] kmem_cache_free+0x10d/0x4d0 [ 31.513481] rcu_core+0x8c8/0x2860 [ 31.513948] __do_softirq+0x1b7/0x7d4 [ 31.514505] [ 31.514740] Last potentially related work creation: [ 31.515350] kasan_save_stack+0x22/0x50 [ 31.515876] __kasan_record_aux_stack+0x8e/0xa0 [ 31.516479] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.517164] remove_vma+0x139/0x170 [ 31.517641] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.518226] do_vmi_munmap+0x1f1/0x2b0 [ 31.518738] __vm_munmap+0x138/0x3a0 [ 31.519229] __x64_sys_munmap+0x59/0x80 [ 31.519754] do_syscall_64+0x3f/0x90 [ 31.520251] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.520926] [ 31.521174] The buggy address belongs to the object at ffff88801a97aae0 [ 31.521174] which belongs to the cache vm_area_struct of size 168 [ 31.522705] The buggy address is located 88 bytes inside of [ 31.522705] freed 168-byte region [ffff88801a97aae0, ffff88801a97ab88) [ 31.524165] [ 31.524398] The buggy address belongs to the physical page: [ 31.525094] page:0000000043593fb1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a97a [ 31.526233] memcg:ffff888018d69f01 [ 31.526678] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.527353] page_type: 0xffffffff() [ 31.527829] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.528790] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018d69f01 [ 31.529755] page dumped because: kasan: bad access detected [ 31.530447] [ 31.530677] Memory state around the buggy address: [ 31.531285] ffff88801a97aa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.532169] ffff88801a97aa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.533054] >ffff88801a97ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.533956] ^ [ 31.534597] ffff88801a97ab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.535492] ffff88801a97ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.536377] ================================================================== [ 31.537570] Disabling lock debugging due to kernel taint [ 33.911837] BUG: Bad rss-counter state mm:00000000b08474ee type:MM_FILEPAGES val:33 [ 33.912986] BUG: Bad rss-counter state mm:00000000b08474ee type:MM_ANONPAGES val:22 [ 34.323945] BUG: Bad rss-counter state mm:000000005cfdc7d9 type:MM_FILEPAGES val:33 [ 34.325311] BUG: Bad rss-counter state mm:000000005cfdc7d9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60721' (ECDSA) to the list of known hosts. 2023/06/20 17:52:23 fuzzer started 2023/06/20 17:52:23 dialing manager at localhost:36067 2023/06/20 17:52:23 checking machine... 2023/06/20 17:52:23 checking revisions... [ 35.043735] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:52:24 testing simple program... [ 35.093758] cgroup: Unknown subsys name 'net' [ 35.131107] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:52:23 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11002b00f89 RSP=ffff888015807c38 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffffffff856cd6a0 R13=ffffffff81787d2a R14=ffff888019241428 R15=ffffffff81eeeee8 RIP=ffffffff812d86f2 RFL=00000247 [---Z-PC] 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 00007fcbea28a900 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=00007fff15264000 CR3=0000000009c6c000 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=0000000000000001 RBX=ffff8880090bf9c8 RCX=ffffffff844f7db4 RDX=0000000000000003 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000003 RSP=ffff8880090bf928 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000003 R11=0000000000000128 R12=0000000000000003 R13=ffff8880090bf9e0 R14=0000000000000001 R15=ffff888019338ec8 RIP=ffffffff814c0250 RFL=00000006 [-----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=00007ffef33aa588 CR3=0000000005482000 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=00007fbf763025100000557b338b9790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000