syzkaller login: [ 30.377312] BUG: Bad rss-counter state mm:00000000b4af8f8e type:MM_FILEPAGES val:33 [ 30.378303] BUG: Bad rss-counter state mm:00000000b4af8f8e type:MM_ANONPAGES val:22 [ 30.544127] ================================================================== [ 30.545216] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.546329] Read of size 8 at addr ffff888018172c20 by task sshd/221 [ 30.547382] [ 30.547611] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.548494] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.549511] Call Trace: [ 30.549828] [ 30.550114] dump_stack_lvl+0x91/0xf0 [ 30.550603] print_report+0xcc/0x620 [ 30.551098] ? __virt_addr_valid+0x102/0x340 [ 30.551657] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.552299] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.552918] kasan_report+0xbe/0xf0 [ 30.553394] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.554009] vma_interval_tree_remove+0xc75/0xec0 [ 30.554616] vma_prepare+0xc54/0x11a0 [ 30.555093] __split_vma+0x5af/0x950 [ 30.555563] ? __pfx___split_vma+0x10/0x10 [ 30.556090] ? find_held_lock+0x2c/0x110 [ 30.556640] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.557208] ? lock_is_held_type+0x9f/0x120 [ 30.557775] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.558387] ? mtree_range_walk+0x632/0x900 [ 30.558970] ? mas_walk+0x5c7/0x7c0 [ 30.559445] do_vmi_munmap+0x1f1/0x2b0 [ 30.559939] mmap_region+0x1f9/0x2660 [ 30.560437] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.560953] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.561684] ? __pfx_lock_acquire+0x10/0x10 [ 30.562253] ? __pfx_mmap_region+0x10/0x10 [ 30.562812] ? security_mmap_addr+0x7d/0xa0 [ 30.563390] ? get_unmapped_area+0x1f5/0x3f0 [ 30.563992] do_mmap+0x854/0xf00 [ 30.564477] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.565010] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.565608] ksys_mmap_pgoff+0x3af/0x500 [ 30.566148] do_syscall_64+0x3f/0x90 [ 30.566655] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.567342] RIP: 0033:0x7ff724894d82 [ 30.567827] 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 [ 30.570156] RSP: 002b:00007ffed2e19e38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.571119] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff724894d82 [ 30.572032] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff723cce000 [ 30.572946] RBP: 00007ff723cce000 R08: 0000000000000009 R09: 0000000000001000 [ 30.573866] R10: 0000000000000812 R11: 0000000000000206 R12: 000056287141ef60 [ 30.574777] R13: 00007ffed2e19e50 R14: 00007ffed2e19e80 R15: 00007ffed2e1a1e0 [ 30.575688] [ 30.575994] [ 30.576235] Allocated by task 214: [ 30.576692] kasan_save_stack+0x22/0x50 [ 30.577233] kasan_set_track+0x25/0x30 [ 30.577766] __kasan_slab_alloc+0x59/0x70 [ 30.578317] kmem_cache_alloc+0x16b/0x370 [ 30.578871] vm_area_dup+0x20/0x160 [ 30.579356] __split_vma+0x170/0x950 [ 30.579845] split_vma+0xc6/0x110 [ 30.580320] mprotect_fixup+0x8d2/0xb30 [ 30.580850] do_mprotect_pkey+0x87e/0xd40 [ 30.581417] __x64_sys_mprotect+0x78/0xc0 [ 30.581963] do_syscall_64+0x3f/0x90 [ 30.582468] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.583154] [ 30.583390] Freed by task 214: [ 30.583860] kasan_save_stack+0x22/0x50 [ 30.584391] kasan_set_track+0x25/0x30 [ 30.584863] kasan_save_free_info+0x2b/0x50 [ 30.585365] __kasan_slab_free+0x10a/0x190 [ 30.585875] kmem_cache_free+0x10d/0x4d0 [ 30.586355] rcu_core+0x8c8/0x2860 [ 30.586780] __do_softirq+0x1b7/0x7d4 [ 30.587232] [ 30.587440] Last potentially related work creation: [ 30.587999] kasan_save_stack+0x22/0x50 [ 30.588738] __kasan_record_aux_stack+0x8e/0xa0 [ 30.589430] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.590200] remove_vma+0x139/0x170 [ 30.590738] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.591408] do_vmi_munmap+0x1f1/0x2b0 [ 30.591984] __vm_munmap+0x138/0x3a0 [ 30.592558] __x64_sys_munmap+0x59/0x80 [ 30.593145] do_syscall_64+0x3f/0x90 [ 30.593708] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.594493] [ 30.594744] The buggy address belongs to the object at ffff888018172bc8 [ 30.594744] which belongs to the cache vm_area_struct of size 168 [ 30.596528] The buggy address is located 88 bytes inside of [ 30.596528] freed 168-byte region [ffff888018172bc8, ffff888018172c70) [ 30.598213] [ 30.598465] The buggy address belongs to the physical page: [ 30.599252] page:000000004e40cd6a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18172 [ 30.600566] memcg:ffff88800e55fc01 [ 30.601075] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.601852] page_type: 0xffffffff() [ 30.602381] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.603481] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e55fc01 [ 30.604580] page dumped because: kasan: bad access detected [ 30.605375] [ 30.605630] Memory state around the buggy address: [ 30.606331] ffff888018172b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.607157] ffff888018172b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.608177] >ffff888018172c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.609207] ^ [ 30.609842] ffff888018172c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.610879] ffff888018172d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.611910] ================================================================== [ 30.612994] Disabling lock debugging due to kernel taint [ 32.812915] BUG: Bad rss-counter state mm:00000000060df839 type:MM_FILEPAGES val:33 [ 32.814239] BUG: Bad rss-counter state mm:00000000060df839 type:MM_ANONPAGES val:22 [ 33.177927] BUG: Bad rss-counter state mm:00000000e578696e type:MM_FILEPAGES val:33 [ 33.179043] BUG: Bad rss-counter state mm:00000000e578696e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62442' (ECDSA) to the list of known hosts. 2023/06/20 22:58:35 fuzzer started 2023/06/20 22:58:35 dialing manager at localhost:36067 2023/06/20 22:58:35 checking machine... 2023/06/20 22:58:35 checking revisions... [ 33.919312] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:58:35 testing simple program... [ 33.966272] cgroup: Unknown subsys name 'net' [ 34.003477] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:58:35 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=00007f3adc7f90b0 CR3=000000000cbb0000 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=2035333a38353a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a38353a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88807ffd7010 RCX=0000000000000000 RDX=ffff888016bf1b40 RSI=ffffffff811431c2 RDI=0000000000000007 RBP=000000000cb5b408 RSP=ffff88800f727060 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000008 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000008 R14=0000000000000002 R15=ffff88800f727278 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 00007f3adc241900 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=00007f3adc220020 CR3=000000000e59e000 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