syzkaller login: [ 30.458297] BUG: Bad rss-counter state mm:00000000da53a7ff type:MM_FILEPAGES val:33 [ 30.459266] BUG: Bad rss-counter state mm:00000000da53a7ff type:MM_ANONPAGES val:22 [ 30.632524] ================================================================== [ 30.633386] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.634278] Read of size 8 at addr ffff888016d68228 by task sshd/220 [ 30.635004] [ 30.635212] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.636117] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.637035] Call Trace: [ 30.637340] [ 30.637609] dump_stack_lvl+0x91/0xf0 [ 30.638075] print_report+0xcc/0x620 [ 30.638554] ? __virt_addr_valid+0x102/0x340 [ 30.639074] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.639654] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.640232] kasan_report+0xbe/0xf0 [ 30.640683] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.641270] vma_interval_tree_remove+0xc75/0xec0 [ 30.641851] vma_prepare+0xc54/0x11a0 [ 30.642343] __split_vma+0x5af/0x950 [ 30.642809] ? __pfx___split_vma+0x10/0x10 [ 30.643326] ? find_held_lock+0x2c/0x110 [ 30.643854] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.644410] ? lock_is_held_type+0x9f/0x120 [ 30.644940] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.645538] ? mtree_range_walk+0x632/0x900 [ 30.646082] ? mas_walk+0x5c7/0x7c0 [ 30.646572] do_vmi_munmap+0x1f1/0x2b0 [ 30.647054] mmap_region+0x1f9/0x2660 [ 30.647540] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.648041] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.648743] ? __pfx_lock_acquire+0x10/0x10 [ 30.649268] ? __pfx_mmap_region+0x10/0x10 [ 30.649789] ? security_mmap_addr+0x7d/0xa0 [ 30.650321] ? get_unmapped_area+0x1f5/0x3f0 [ 30.650871] do_mmap+0x854/0xf00 [ 30.651297] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.651791] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.652346] ksys_mmap_pgoff+0x3af/0x500 [ 30.652845] do_syscall_64+0x3f/0x90 [ 30.653320] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.653955] RIP: 0033:0x7f009dbfed82 [ 30.654420] 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 [ 30.656536] RSP: 002b:00007fff01407b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.657410] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f009dbfed82 [ 30.658269] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f009d038000 [ 30.659111] RBP: 00007f009d038000 R08: 0000000000000009 R09: 0000000000001000 [ 30.659955] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560b1bcd5ec0 [ 30.660795] R13: 00007fff01407b60 R14: 00007fff01407b90 R15: 00007fff01407ef0 [ 30.661644] [ 30.661933] [ 30.662154] Allocated by task 213: [ 30.662595] kasan_save_stack+0x22/0x50 [ 30.663092] kasan_set_track+0x25/0x30 [ 30.663591] __kasan_slab_alloc+0x59/0x70 [ 30.664103] kmem_cache_alloc+0x16b/0x370 [ 30.664612] vm_area_dup+0x20/0x160 [ 30.665060] __split_vma+0x170/0x950 [ 30.665518] split_vma+0xc6/0x110 [ 30.665956] mprotect_fixup+0x8d2/0xb30 [ 30.666465] do_mprotect_pkey+0x87e/0xd40 [ 30.666984] __x64_sys_mprotect+0x78/0xc0 [ 30.667503] do_syscall_64+0x3f/0x90 [ 30.667971] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.668603] [ 30.668819] Freed by task 213: [ 30.669206] kasan_save_stack+0x22/0x50 [ 30.669703] kasan_set_track+0x25/0x30 [ 30.670202] kasan_save_free_info+0x2b/0x50 [ 30.670731] __kasan_slab_free+0x10a/0x190 [ 30.671263] kmem_cache_free+0x10d/0x4d0 [ 30.671760] rcu_core+0x8c8/0x2860 [ 30.672194] __do_softirq+0x1b7/0x7d4 [ 30.672658] [ 30.672871] Last potentially related work creation: [ 30.673444] kasan_save_stack+0x22/0x50 [ 30.673939] __kasan_record_aux_stack+0x8e/0xa0 [ 30.674518] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.675153] remove_vma+0x139/0x170 [ 30.675607] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.676159] do_vmi_munmap+0x1f1/0x2b0 [ 30.676640] __vm_munmap+0x138/0x3a0 [ 30.677102] __x64_sys_munmap+0x59/0x80 [ 30.677592] do_syscall_64+0x3f/0x90 [ 30.678071] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.678715] [ 30.678924] Second to last potentially related work creation: [ 30.679597] kasan_save_stack+0x22/0x50 [ 30.680090] __kasan_record_aux_stack+0x8e/0xa0 [ 30.680652] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.681279] remove_vma+0x139/0x170 [ 30.681732] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.682299] do_vmi_munmap+0x1f1/0x2b0 [ 30.682779] mmap_region+0x1f9/0x2660 [ 30.683251] do_mmap+0x854/0xf00 [ 30.683677] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.684152] ksys_mmap_pgoff+0x3af/0x500 [ 30.684651] do_syscall_64+0x3f/0x90 [ 30.685116] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.685754] [ 30.685961] The buggy address belongs to the object at ffff888016d681d0 [ 30.685961] which belongs to the cache vm_area_struct of size 168 [ 30.687427] The buggy address is located 88 bytes inside of [ 30.687427] freed 168-byte region [ffff888016d681d0, ffff888016d68278) [ 30.688816] [ 30.689024] The buggy address belongs to the physical page: [ 30.689671] page:00000000cc3dbc06 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d68 [ 30.690756] memcg:ffff88800fbb3f01 [ 30.691176] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.691815] page_type: 0xffffffff() [ 30.692252] raw: 0100000000000200 ffff8880087a0c80 ffffea00005b5940 dead000000000004 [ 30.693174] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fbb3f01 [ 30.694061] page dumped because: kasan: bad access detected [ 30.694737] [ 30.694958] Memory state around the buggy address: [ 30.695523] ffff888016d68100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.696374] ffff888016d68180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.697219] >ffff888016d68200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.698056] ^ [ 30.698631] ffff888016d68280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.699495] ffff888016d68300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.700344] ================================================================== [ 30.701353] Disabling lock debugging due to kernel taint [ 32.531990] BUG: Bad rss-counter state mm:0000000065f81461 type:MM_FILEPAGES val:33 [ 32.532887] BUG: Bad rss-counter state mm:0000000065f81461 type:MM_ANONPAGES val:22 [ 32.969632] BUG: Bad rss-counter state mm:00000000f8b91aac type:MM_FILEPAGES val:33 [ 32.970640] BUG: Bad rss-counter state mm:00000000f8b91aac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2938' (ECDSA) to the list of known hosts. 2023/06/20 19:47:33 fuzzer started 2023/06/20 19:47:33 dialing manager at localhost:36067 2023/06/20 19:47:33 checking machine... 2023/06/20 19:47:33 checking revisions... [ 33.692479] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:47:33 testing simple program... [ 33.734433] cgroup: Unknown subsys name 'net' [ 33.775111] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:47:33 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f856b4d0d20 CR3=000000000c5d6000 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=be7304f5819fc8aeae43671ceaf0a8e8 XMM02=2c67c8bc2e329bc3000000000011b118 XMM03=fb795ef6d657705600000000001225f0 XMM04=e6d1cf29bb0f845500000000000ae988 XMM05=7d6ea8df3df26a2f0000000000134558 XMM06=4fda316b135da52b00000000001335f8 XMM07=e042d86d42eb936e0000000000122870 XMM08=55c2174a34a4b933000000000011b178 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001cb0ed1 RBX=ffff88800e587658 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e587688 RBP=ffff888018d61500 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff888018d60540 R14=ffffffff818d9c06 R15=ffff88800da11580 RIP=ffffffff818464e2 RFL=00000046 [---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 00007f84c0892900 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=00007ffebcbfa000 CR3=00000000198b2000 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=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