syzkaller login: [ 30.158192] BUG: Bad rss-counter state mm:00000000279c9d99 type:MM_FILEPAGES val:33 [ 30.159580] BUG: Bad rss-counter state mm:00000000279c9d99 type:MM_ANONPAGES val:22 [ 30.318277] ================================================================== [ 30.319306] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.320292] Read of size 8 at addr ffff88800eec1310 by task sshd/219 [ 30.321246] [ 30.321477] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.322393] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.323428] Call Trace: [ 30.323763] <TASK> [ 30.324067] dump_stack_lvl+0x91/0xf0 [ 30.324587] print_report+0xcc/0x620 [ 30.325099] ? __virt_addr_valid+0x102/0x340 [ 30.325687] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.326365] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.327013] kasan_report+0xbe/0xf0 [ 30.327517] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.328180] vma_interval_tree_remove+0xc75/0xec0 [ 30.328834] vma_prepare+0xc54/0x11a0 [ 30.329356] __split_vma+0x5af/0x950 [ 30.329871] ? __pfx___split_vma+0x10/0x10 [ 30.330456] ? find_held_lock+0x2c/0x110 [ 30.331023] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.331642] ? lock_is_held_type+0x9f/0x120 [ 30.332238] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.332909] ? mtree_range_walk+0x632/0x900 [ 30.333512] ? mas_walk+0x5c7/0x7c0 [ 30.334031] do_vmi_munmap+0x1f1/0x2b0 [ 30.334573] mmap_region+0x1f9/0x2660 [ 30.335097] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.335650] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.336419] ? __pfx_lock_acquire+0x10/0x10 [ 30.337002] ? __pfx_mmap_region+0x10/0x10 [ 30.337574] ? security_mmap_addr+0x7d/0xa0 [ 30.338166] ? get_unmapped_area+0x1f5/0x3f0 [ 30.338765] do_mmap+0x854/0xf00 [ 30.339239] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.339771] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.340379] ksys_mmap_pgoff+0x3af/0x500 [ 30.340928] do_syscall_64+0x3f/0x90 [ 30.341451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.342160] RIP: 0033:0x7f801c830d82 [ 30.342657] 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 [ 30.344966] RSP: 002b:00007ffdcda13dd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.345943] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f801c830d82 [ 30.346871] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f801bc6a000 [ 30.347785] RBP: 00007f801bc6a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.348703] R10: 0000000000000812 R11: 0000000000000206 R12: 00005559f4787ec0 [ 30.349622] R13: 00007ffdcda13df0 R14: 00007ffdcda13e20 R15: 00007ffdcda14180 [ 30.350723] </TASK> [ 30.351053] [ 30.351297] Allocated by task 212: [ 30.351776] kasan_save_stack+0x22/0x50 [ 30.352346] kasan_set_track+0x25/0x30 [ 30.352896] __kasan_slab_alloc+0x59/0x70 [ 30.353485] kmem_cache_alloc+0x16b/0x370 [ 30.354063] vm_area_dup+0x20/0x160 [ 30.354574] __split_vma+0x170/0x950 [ 30.355090] split_vma+0xc6/0x110 [ 30.355575] mprotect_fixup+0x8d2/0xb30 [ 30.356126] do_mprotect_pkey+0x87e/0xd40 [ 30.356703] __x64_sys_mprotect+0x78/0xc0 [ 30.357278] do_syscall_64+0x3f/0x90 [ 30.357805] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.358533] [ 30.358773] Freed by task 212: [ 30.359211] kasan_save_stack+0x22/0x50 [ 30.359767] kasan_set_track+0x25/0x30 [ 30.360313] kasan_save_free_info+0x2b/0x50 [ 30.360902] __kasan_slab_free+0x10a/0x190 [ 30.361491] kmem_cache_free+0x10d/0x4d0 [ 30.362101] rcu_core+0x8c8/0x2860 [ 30.362602] __do_softirq+0x1b7/0x7d4 [ 30.363141] [ 30.363382] Last potentially related work creation: [ 30.364043] kasan_save_stack+0x22/0x50 [ 30.364612] __kasan_record_aux_stack+0x8e/0xa0 [ 30.365228] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.365919] remove_vma+0x139/0x170 [ 30.366419] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.367018] do_vmi_munmap+0x1f1/0x2b0 [ 30.367545] __vm_munmap+0x138/0x3a0 [ 30.368049] __x64_sys_munmap+0x59/0x80 [ 30.368583] do_syscall_64+0x3f/0x90 [ 30.369096] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.369791] [ 30.370024] The buggy address belongs to the object at ffff88800eec12b8 [ 30.370024] which belongs to the cache vm_area_struct of size 168 [ 30.371646] The buggy address is located 88 bytes inside of [ 30.371646] freed 168-byte region [ffff88800eec12b8, ffff88800eec1360) [ 30.373197] [ 30.373436] The buggy address belongs to the physical page: [ 30.374176] page:000000006b02e31b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeec1 [ 30.375377] memcg:ffff88800ebeb001 [ 30.375841] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.376547] page_type: 0xffffffff() [ 30.377039] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b9fc0 dead000000000006 [ 30.378048] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebeb001 [ 30.379067] page dumped because: kasan: bad access detected [ 30.379807] [ 30.380040] Memory state around the buggy address: [ 30.380666] ffff88800eec1200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.381579] ffff88800eec1280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.382501] >ffff88800eec1300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.383401] ^ [ 30.383899] ffff88800eec1380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.384807] ffff88800eec1400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.385715] ================================================================== [ 30.386723] Disabling lock debugging due to kernel taint [ 32.353592] BUG: Bad rss-counter state mm:00000000c7919510 type:MM_FILEPAGES val:33 [ 32.355261] BUG: Bad rss-counter state mm:00000000c7919510 type:MM_ANONPAGES val:22 [ 32.808662] BUG: Bad rss-counter state mm:00000000158456c6 type:MM_FILEPAGES val:33 [ 32.809654] BUG: Bad rss-counter state mm:00000000158456c6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34543' (ECDSA) to the list of known hosts. 2023/06/20 15:35:57 fuzzer started 2023/06/20 15:35:57 dialing manager at localhost:36067 2023/06/20 15:35:57 checking machine... 2023/06/20 15:35:57 checking revisions... [ 33.543977] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:35:57 testing simple program... [ 33.600935] cgroup: Unknown subsys name 'net' [ 33.660001] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:35:57 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000001255 RCX=0000000000000000 RDX=ffff888019653680 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88800ea451d0 RSP=ffff888016aafe70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=00007f865199a618 R14=ffff88800ea451e0 R15=0000000000000000 RIP=ffffffff814c0400 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 00007f86513e3900 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=00007f865199a618 CR3=000000000e5c0000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f6c297e45b8 CR3=000000000cafe000 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=7c0ce5d2016d93a8814f6f9fc3447330 XMM02=ec2efd57dc4c00df000000000011ac98 XMM03=867ec3faaa1abed0000000000011ad68 XMM04=5234516072edf19400000000000ae988 XMM05=d8490613aac7150f0000000000132700 XMM06=806171799158d9670000000000131b28 XMM07=e042d86d42eb936e00000000001220f8 XMM08=867ec3faaa1abed0000000000011ad68 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000