syzkaller login: [ 41.356143] BUG: Bad rss-counter state mm:00000000d5764ebc type:MM_FILEPAGES val:33 [ 41.357110] BUG: Bad rss-counter state mm:00000000d5764ebc type:MM_ANONPAGES val:22 [ 41.515551] ================================================================== [ 41.516412] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.517326] Read of size 8 at addr ffff88800e9225c8 by task sshd/221 [ 41.518068] [ 41.518278] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.519256] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.520313] Call Trace: [ 41.520656] [ 41.521013] dump_stack_lvl+0x91/0xf0 [ 41.521649] print_report+0xcc/0x620 [ 41.522267] ? __virt_addr_valid+0x102/0x340 [ 41.522963] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.523763] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.524546] kasan_report+0xbe/0xf0 [ 41.525160] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.525873] vma_interval_tree_remove+0xc75/0xec0 [ 41.526489] vma_prepare+0xc54/0x11a0 [ 41.527033] __split_vma+0x5af/0x950 [ 41.527542] ? __pfx___split_vma+0x10/0x10 [ 41.528111] ? find_held_lock+0x2c/0x110 [ 41.528671] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.529317] ? lock_is_held_type+0x9f/0x120 [ 41.529874] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.530489] ? mtree_range_walk+0x632/0x900 [ 41.531050] ? mas_walk+0x5c7/0x7c0 [ 41.531547] do_vmi_munmap+0x1f1/0x2b0 [ 41.532062] mmap_region+0x1f9/0x2660 [ 41.532549] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.533078] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.533811] ? __pfx_lock_acquire+0x10/0x10 [ 41.534358] ? __pfx_mmap_region+0x10/0x10 [ 41.534903] ? security_mmap_addr+0x7d/0xa0 [ 41.535436] ? get_unmapped_area+0x1f5/0x3f0 [ 41.536047] do_mmap+0x854/0xf00 [ 41.536490] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.537001] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.537572] ksys_mmap_pgoff+0x3af/0x500 [ 41.538093] do_syscall_64+0x3f/0x90 [ 41.538581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.539246] RIP: 0033:0x7f5c37b1cd82 [ 41.539739] 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 [ 41.541904] RSP: 002b:00007ffffea7bd88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.542833] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5c37b1cd82 [ 41.543813] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5c36f56000 [ 41.544826] RBP: 00007f5c36f56000 R08: 0000000000000009 R09: 0000000000001000 [ 41.545827] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d786195ec0 [ 41.546817] R13: 00007ffffea7bda0 R14: 00007ffffea7bdd0 R15: 00007ffffea7c130 [ 41.547850] [ 41.548193] [ 41.548445] Allocated by task 214: [ 41.548946] kasan_save_stack+0x22/0x50 [ 41.549541] kasan_set_track+0x25/0x30 [ 41.550125] __kasan_slab_alloc+0x59/0x70 [ 41.550740] kmem_cache_alloc+0x16b/0x370 [ 41.551346] vm_area_dup+0x20/0x160 [ 41.551897] __split_vma+0x170/0x950 [ 41.552460] split_vma+0xc6/0x110 [ 41.552975] mprotect_fixup+0x8d2/0xb30 [ 41.553562] do_mprotect_pkey+0x87e/0xd40 [ 41.554182] __x64_sys_mprotect+0x78/0xc0 [ 41.554791] do_syscall_64+0x3f/0x90 [ 41.555346] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.556105] [ 41.556357] Freed by task 214: [ 41.556823] kasan_save_stack+0x22/0x50 [ 41.557419] kasan_set_track+0x25/0x30 [ 41.557999] kasan_save_free_info+0x2b/0x50 [ 41.558625] __kasan_slab_free+0x10a/0x190 [ 41.559250] kmem_cache_free+0x10d/0x4d0 [ 41.559859] rcu_core+0x8c8/0x2860 [ 41.560306] __do_softirq+0x1b7/0x7d4 [ 41.560857] [ 41.561073] Last potentially related work creation: [ 41.561664] kasan_save_stack+0x22/0x50 [ 41.562169] __kasan_record_aux_stack+0x8e/0xa0 [ 41.562746] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.563389] remove_vma+0x139/0x170 [ 41.563857] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.564414] do_vmi_munmap+0x1f1/0x2b0 [ 41.564902] __vm_munmap+0x138/0x3a0 [ 41.565371] __x64_sys_munmap+0x59/0x80 [ 41.565871] do_syscall_64+0x3f/0x90 [ 41.566343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.566991] [ 41.567204] The buggy address belongs to the object at ffff88800e922570 [ 41.567204] which belongs to the cache vm_area_struct of size 168 [ 41.568697] The buggy address is located 88 bytes inside of [ 41.568697] freed 168-byte region [ffff88800e922570, ffff88800e922618) [ 41.570108] [ 41.570323] The buggy address belongs to the physical page: [ 41.570987] page:00000000ba3ff893 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe922 [ 41.572091] memcg:ffff888009a89901 [ 41.572527] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.573222] page_type: 0xffffffff() [ 41.573672] raw: 0100000000000200 ffff88800879fc80 ffffea00003a6700 dead00000000000b [ 41.574617] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a89901 [ 41.575534] page dumped because: kasan: bad access detected [ 41.576219] [ 41.576435] Memory state around the buggy address: [ 41.577017] ffff88800e922480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.577879] ffff88800e922500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 41.578737] >ffff88800e922580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.579628] ^ [ 41.580291] ffff88800e922600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 41.581142] ffff88800e922680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.581996] ================================================================== [ 41.582982] Disabling lock debugging due to kernel taint [ 43.958046] BUG: Bad rss-counter state mm:000000001f27b452 type:MM_FILEPAGES val:33 [ 43.959084] BUG: Bad rss-counter state mm:000000001f27b452 type:MM_ANONPAGES val:22 [ 44.398683] BUG: Bad rss-counter state mm:00000000b7fd5adf type:MM_FILEPAGES val:33 [ 44.400108] BUG: Bad rss-counter state mm:00000000b7fd5adf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39729' (ECDSA) to the list of known hosts. 2023/06/20 05:36:00 fuzzer started 2023/06/20 05:36:00 dialing manager at localhost:44161 2023/06/20 05:36:00 checking machine... 2023/06/20 05:36:00 checking revisions... [ 45.137641] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:36:00 testing simple program... [ 45.190843] cgroup: Unknown subsys name 'net' [ 45.237682] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:35:49 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f1731ba2740 CR3=0000000018166000 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=2039353a35333a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a35333a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff84492ee7 RDX=ffff88801824d1c0 RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000000000 RSP=ffff888016de70d8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=ffff88800c98860c R12=ffff888016de7768 R13=0000000000000020 R14=0000000000000001 R15=0000000000000003 RIP=ffffffff814c07e4 RFL=00000202 [-------] 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 00007f4c84d9f900 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=00007f4c84d7e020 CR3=000000001a308000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000