syzkaller login: [ 41.557175] BUG: Bad rss-counter state mm:00000000894c0f19 type:MM_FILEPAGES val:33 [ 41.558406] BUG: Bad rss-counter state mm:00000000894c0f19 type:MM_ANONPAGES val:22 [ 41.710261] ================================================================== [ 41.711198] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.712130] Read of size 8 at addr ffff88800eb71058 by task sshd/226 [ 41.712891] [ 41.713228] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.714099] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.715119] Call Trace: [ 41.715477] [ 41.715764] dump_stack_lvl+0x91/0xf0 [ 41.716251] print_report+0xcc/0x620 [ 41.716734] ? __virt_addr_valid+0x102/0x340 [ 41.717276] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.717902] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.718514] kasan_report+0xbe/0xf0 [ 41.719009] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.719624] vma_interval_tree_remove+0xc75/0xec0 [ 41.720223] vma_prepare+0xc54/0x11a0 [ 41.720699] __split_vma+0x5af/0x950 [ 41.721169] ? __pfx___split_vma+0x10/0x10 [ 41.721698] ? find_held_lock+0x2c/0x110 [ 41.722217] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.722806] ? lock_is_held_type+0x9f/0x120 [ 41.723347] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.723952] ? mtree_range_walk+0x632/0x900 [ 41.724497] ? mas_walk+0x5c7/0x7c0 [ 41.724967] do_vmi_munmap+0x1f1/0x2b0 [ 41.725459] mmap_region+0x1f9/0x2660 [ 41.725938] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.726449] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.727183] ? __pfx_lock_acquire+0x10/0x10 [ 41.727711] ? __pfx_mmap_region+0x10/0x10 [ 41.728241] ? security_mmap_addr+0x7d/0xa0 [ 41.728768] ? get_unmapped_area+0x1f5/0x3f0 [ 41.729316] do_mmap+0x854/0xf00 [ 41.729753] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.730256] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.730834] ksys_mmap_pgoff+0x3af/0x500 [ 41.731337] do_syscall_64+0x3f/0x90 [ 41.731809] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.732449] RIP: 0033:0x7f41e3238d82 [ 41.732900] 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 [ 41.735025] RSP: 002b:00007ffd54707518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.735921] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f41e3238d82 [ 41.736765] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f41e2672000 [ 41.737611] RBP: 00007f41e2672000 R08: 0000000000000009 R09: 0000000000001000 [ 41.738447] R10: 0000000000000812 R11: 0000000000000206 R12: 000056046df48ec0 [ 41.739324] R13: 00007ffd54707530 R14: 00007ffd54707560 R15: 00007ffd547078c0 [ 41.740175] [ 41.740466] [ 41.740681] Allocated by task 219: [ 41.741118] kasan_save_stack+0x22/0x50 [ 41.741643] kasan_set_track+0x25/0x30 [ 41.742155] __kasan_slab_alloc+0x59/0x70 [ 41.742732] kmem_cache_alloc+0x16b/0x370 [ 41.743293] vm_area_dup+0x20/0x160 [ 41.743753] __split_vma+0x170/0x950 [ 41.744211] split_vma+0xc6/0x110 [ 41.744657] mprotect_fixup+0x8d2/0xb30 [ 41.745158] do_mprotect_pkey+0x87e/0xd40 [ 41.745676] __x64_sys_mprotect+0x78/0xc0 [ 41.746203] do_syscall_64+0x3f/0x90 [ 41.746687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.747353] [ 41.747577] Freed by task 219: [ 41.747981] kasan_save_stack+0x22/0x50 [ 41.748493] kasan_set_track+0x25/0x30 [ 41.749009] kasan_save_free_info+0x2b/0x50 [ 41.749565] __kasan_slab_free+0x10a/0x190 [ 41.750114] kmem_cache_free+0x10d/0x4d0 [ 41.750631] rcu_core+0x8c8/0x2860 [ 41.751117] __do_softirq+0x1b7/0x7d4 [ 41.751604] [ 41.751820] Last potentially related work creation: [ 41.752418] kasan_save_stack+0x22/0x50 [ 41.752922] __kasan_record_aux_stack+0x8e/0xa0 [ 41.753506] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.754173] remove_vma+0x139/0x170 [ 41.754686] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.755247] do_vmi_munmap+0x1f1/0x2b0 [ 41.755740] __vm_munmap+0x138/0x3a0 [ 41.756208] __x64_sys_munmap+0x59/0x80 [ 41.756729] do_syscall_64+0x3f/0x90 [ 41.757199] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.757838] [ 41.758051] The buggy address belongs to the object at ffff88800eb71000 [ 41.758051] which belongs to the cache vm_area_struct of size 168 [ 41.759512] The buggy address is located 88 bytes inside of [ 41.759512] freed 168-byte region [ffff88800eb71000, ffff88800eb710a8) [ 41.760930] [ 41.761150] The buggy address belongs to the physical page: [ 41.761805] page:00000000f715f091 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb71 [ 41.762921] memcg:ffff888016457d01 [ 41.763361] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.763997] page_type: 0xffffffff() [ 41.764465] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.765431] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016457d01 [ 41.766384] page dumped because: kasan: bad access detected [ 41.767073] [ 41.767285] Memory state around the buggy address: [ 41.767861] ffff88800eb70f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.768764] ffff88800eb70f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.769643] >ffff88800eb71000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.770529] ^ [ 41.771272] ffff88800eb71080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 41.772152] ffff88800eb71100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.773023] ================================================================== [ 41.773983] Disabling lock debugging due to kernel taint [ 43.796251] BUG: Bad rss-counter state mm:0000000044305a74 type:MM_FILEPAGES val:33 [ 43.797998] BUG: Bad rss-counter state mm:0000000044305a74 type:MM_ANONPAGES val:22 [ 44.359626] BUG: Bad rss-counter state mm:000000007cd311ca type:MM_FILEPAGES val:33 [ 44.360795] BUG: Bad rss-counter state mm:000000007cd311ca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18274' (ECDSA) to the list of known hosts. 2023/06/19 17:32:24 fuzzer started 2023/06/19 17:32:24 dialing manager at localhost:44161 2023/06/19 17:32:24 checking machine... 2023/06/19 17:32:24 checking revisions... [ 45.014949] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:32:24 testing simple program... [ 45.071513] cgroup: Unknown subsys name 'net' [ 45.131927] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:32:21 Registers: info registers vcpu 0 RAX=1ffff11001d67ac8 RBX=0000000000000038 RCX=dffffc0000000000 RDX=ffff8880164651c0 RSI=ffffffff8449effb RDI=ffff88800eb3d640 RBP=ffff88800eb3d608 RSP=ffff888015827ce8 R8 =0000000000000000 R9 =0000000000000007 R10=000000000000000d R11=0000000000000000 R12=0000000000000007 R13=000000000000000d R14=00007f1c69155000 R15=0000556759dd6fff RIP=ffffffff8449f015 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1c69c33900 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=00007f1c69155000 CR3=000000000d53e000 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=00000000000aead06b1e99b806172e3b XMM01=00000000000f8e7080f09f19808d26a3 XMM02=00000000000f91b02e86c1e8fc577532 XMM03=00000000000fb920ac585006bc0bee6f XMM04=f901354e43ada3be00000000000ae988 XMM05=6860aeb314f8829d0000000000135060 XMM06=6f97f853449a24bb0000000000134238 XMM07=e042d86d42eb936e00000000001261c8 XMM08=c295341d9be4083f0000000000120490 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00005594e3172218 CR3=000000000b382000 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=2033323a32333a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a32333a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000