syzkaller login: [ 46.535362] BUG: Bad rss-counter state mm:00000000ab3de122 type:MM_FILEPAGES val:33 [ 46.536562] BUG: Bad rss-counter state mm:00000000ab3de122 type:MM_ANONPAGES val:22 [ 46.695280] ================================================================== [ 46.696224] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.697201] Read of size 8 at addr ffff88800fc58c20 by task sshd/221 [ 46.698140] [ 46.698388] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.699277] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.700268] Call Trace: [ 46.700600] [ 46.700885] dump_stack_lvl+0x91/0xf0 [ 46.701440] print_report+0xcc/0x620 [ 46.701931] ? __virt_addr_valid+0x102/0x340 [ 46.702520] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.703165] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.703797] kasan_report+0xbe/0xf0 [ 46.704287] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.704909] vma_interval_tree_remove+0xc75/0xec0 [ 46.705552] vma_prepare+0xc54/0x11a0 [ 46.706034] __split_vma+0x5af/0x950 [ 46.706527] ? __pfx___split_vma+0x10/0x10 [ 46.707078] ? find_held_lock+0x2c/0x110 [ 46.707621] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.708220] ? lock_is_held_type+0x9f/0x120 [ 46.708762] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.709402] ? mtree_range_walk+0x632/0x900 [ 46.709960] ? mas_walk+0x5c7/0x7c0 [ 46.710444] do_vmi_munmap+0x1f1/0x2b0 [ 46.710948] mmap_region+0x1f9/0x2660 [ 46.711456] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.711979] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.712714] ? __pfx_lock_acquire+0x10/0x10 [ 46.713288] ? __pfx_mmap_region+0x10/0x10 [ 46.713839] ? security_mmap_addr+0x7d/0xa0 [ 46.714399] ? get_unmapped_area+0x1f5/0x3f0 [ 46.714958] do_mmap+0x854/0xf00 [ 46.715423] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.715919] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.716502] ksys_mmap_pgoff+0x3af/0x500 [ 46.717019] do_syscall_64+0x3f/0x90 [ 46.717538] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.718199] RIP: 0033:0x7f229a257d82 [ 46.718657] 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 [ 46.720828] RSP: 002b:00007fff017d0b38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.721766] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f229a257d82 [ 46.722639] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2299691000 [ 46.723530] RBP: 00007f2299691000 R08: 0000000000000009 R09: 0000000000001000 [ 46.724404] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f5463a7ec0 [ 46.725281] R13: 00007fff017d0b50 R14: 00007fff017d0b80 R15: 00007fff017d0ee0 [ 46.726153] [ 46.726448] [ 46.726662] Allocated by task 214: [ 46.727119] kasan_save_stack+0x22/0x50 [ 46.727630] kasan_set_track+0x25/0x30 [ 46.728146] __kasan_slab_alloc+0x59/0x70 [ 46.728674] kmem_cache_alloc+0x16b/0x370 [ 46.729227] vm_area_dup+0x20/0x160 [ 46.729685] __split_vma+0x170/0x950 [ 46.730173] split_vma+0xc6/0x110 [ 46.730619] mprotect_fixup+0x8d2/0xb30 [ 46.731150] do_mprotect_pkey+0x87e/0xd40 [ 46.731676] __x64_sys_mprotect+0x78/0xc0 [ 46.732219] do_syscall_64+0x3f/0x90 [ 46.732702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.733388] [ 46.733606] Freed by task 214: [ 46.733996] kasan_save_stack+0x22/0x50 [ 46.734516] kasan_set_track+0x25/0x30 [ 46.735011] kasan_save_free_info+0x2b/0x50 [ 46.735574] __kasan_slab_free+0x10a/0x190 [ 46.736137] kmem_cache_free+0x10d/0x4d0 [ 46.736665] rcu_core+0x8c8/0x2860 [ 46.737132] __do_softirq+0x1b7/0x7d4 [ 46.737639] [ 46.737861] Last potentially related work creation: [ 46.738476] kasan_save_stack+0x22/0x50 [ 46.738992] __kasan_record_aux_stack+0x8e/0xa0 [ 46.739624] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.740280] remove_vma+0x139/0x170 [ 46.740732] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.741333] do_vmi_munmap+0x1f1/0x2b0 [ 46.741821] __vm_munmap+0x138/0x3a0 [ 46.742319] __x64_sys_munmap+0x59/0x80 [ 46.742813] do_syscall_64+0x3f/0x90 [ 46.743315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.743963] [ 46.744193] Second to last potentially related work creation: [ 46.744873] kasan_save_stack+0x22/0x50 [ 46.745401] __kasan_record_aux_stack+0x8e/0xa0 [ 46.745972] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.746630] remove_vma+0x139/0x170 [ 46.747107] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.747671] do_vmi_munmap+0x1f1/0x2b0 [ 46.748181] mmap_region+0x1f9/0x2660 [ 46.748668] do_mmap+0x854/0xf00 [ 46.749109] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.749628] ksys_mmap_pgoff+0x3af/0x500 [ 46.750154] do_syscall_64+0x3f/0x90 [ 46.750636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.751302] [ 46.751523] The buggy address belongs to the object at ffff88800fc58bc8 [ 46.751523] which belongs to the cache vm_area_struct of size 168 [ 46.752995] The buggy address is located 88 bytes inside of [ 46.752995] freed 168-byte region [ffff88800fc58bc8, ffff88800fc58c70) [ 46.754457] [ 46.754677] The buggy address belongs to the physical page: [ 46.755361] page:000000002834f3bc refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800fc58000 pfn:0xfc58 [ 46.756618] memcg:ffff8880167ae801 [ 46.757065] flags: 0x100000000000200(slab|node=0|zone=1) [ 46.757737] page_type: 0xffffffff() [ 46.758205] raw: 0100000000000200 ffff88800879fc80 ffffea0000657600 dead000000000008 [ 46.759148] raw: ffff88800fc58000 0000000080110007 00000001ffffffff ffff8880167ae801 [ 46.760070] page dumped because: kasan: bad access detected [ 46.760729] [ 46.760949] Memory state around the buggy address: [ 46.761552] ffff88800fc58b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.762435] ffff88800fc58b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 46.763315] >ffff88800fc58c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 46.764181] ^ [ 46.764712] ffff88800fc58c80: fc fc fc fc fc fc fb fb fb fb fb fb fb fb fb fb [ 46.765596] ffff88800fc58d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 46.766466] ================================================================== [ 46.767431] Disabling lock debugging due to kernel taint [ 48.543739] BUG: Bad rss-counter state mm:00000000526d2f12 type:MM_FILEPAGES val:33 [ 48.544488] BUG: Bad rss-counter state mm:00000000526d2f12 type:MM_ANONPAGES val:22 [ 48.982596] BUG: Bad rss-counter state mm:000000005050acbc type:MM_FILEPAGES val:33 [ 48.983583] BUG: Bad rss-counter state mm:000000005050acbc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55799' (ECDSA) to the list of known hosts. 2023/06/20 02:30:12 fuzzer started 2023/06/20 02:30:12 dialing manager at localhost:44161 2023/06/20 02:30:12 checking machine... 2023/06/20 02:30:12 checking revisions... [ 49.706040] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:30:12 testing simple program... [ 49.753892] cgroup: Unknown subsys name 'net' [ 49.790584] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:29:56 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=00007ffc460fbb88 CR3=0000000019770000 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=2031313a30333a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a30333a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=00007fc90f92d410 CR3=000000000ecd6000 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=5556d1b2cf4f8886c445ccefdb5ff4cf XMM02=000000000011cca8ec2efd57dc4c00df XMM03=00000000001245f0f1f7d1aeccc0493d XMM04=3d6786e13c70325e00000000000ae988 XMM05=e4cb8bb95a7664b60000000000135430 XMM06=394dc1109298807f0000000000134298 XMM07=e042d86d42eb936e0000000000124870 XMM08=f1f7d1aeccc0493d000000000011cd08 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000