syzkaller login: [ 31.904401] BUG: Bad rss-counter state mm:0000000011da4cd1 type:MM_FILEPAGES val:33 [ 31.905662] BUG: Bad rss-counter state mm:0000000011da4cd1 type:MM_ANONPAGES val:22 [ 31.944124] ================================================================== [ 31.945174] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.946127] Read of size 8 at addr ffff88800f4443f8 by task sshd/221 [ 31.946845] [ 31.947053] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.947857] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.948780] Call Trace: [ 31.949086] [ 31.949358] dump_stack_lvl+0x91/0xf0 [ 31.949824] print_report+0xcc/0x620 [ 31.950311] ? __virt_addr_valid+0x102/0x340 [ 31.950867] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.951480] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.952088] kasan_report+0xbe/0xf0 [ 31.952565] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.953201] vma_interval_tree_remove+0xc75/0xec0 [ 31.953811] vma_prepare+0xc54/0x11a0 [ 31.954293] __split_vma+0x5af/0x950 [ 31.954767] ? __pfx___split_vma+0x10/0x10 [ 31.955298] ? find_held_lock+0x2c/0x110 [ 31.955821] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.956393] ? lock_is_held_type+0x9f/0x120 [ 31.956959] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.957568] ? mtree_range_walk+0x632/0x900 [ 31.958119] ? mas_walk+0x5c7/0x7c0 [ 31.958597] do_vmi_munmap+0x1f1/0x2b0 [ 31.959084] mmap_region+0x1f9/0x2660 [ 31.959555] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.960072] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.960777] ? __pfx_lock_acquire+0x10/0x10 [ 31.961306] ? __pfx_mmap_region+0x10/0x10 [ 31.961841] ? security_mmap_addr+0x7d/0xa0 [ 31.962375] ? get_unmapped_area+0x1f5/0x3f0 [ 31.962932] do_mmap+0x854/0xf00 [ 31.963368] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.963860] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.964427] ksys_mmap_pgoff+0x3af/0x500 [ 31.964946] do_syscall_64+0x3f/0x90 [ 31.965410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.966059] RIP: 0033:0x7f1877845d82 [ 31.966516] 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 [ 31.968667] RSP: 002b:00007ffe4cdb0cd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.969567] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1877845d82 [ 31.970418] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1876c7f000 [ 31.971268] RBP: 00007f1876c7f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.972122] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557dd9c68ec0 [ 31.972980] R13: 00007ffe4cdb0cf0 R14: 00007ffe4cdb0d20 R15: 00007ffe4cdb1080 [ 31.973839] [ 31.974135] [ 31.974354] Allocated by task 214: [ 31.974786] kasan_save_stack+0x22/0x50 [ 31.975286] kasan_set_track+0x25/0x30 [ 31.975771] __kasan_slab_alloc+0x59/0x70 [ 31.976300] kmem_cache_alloc+0x16b/0x370 [ 31.976835] vm_area_dup+0x20/0x160 [ 31.977284] __split_vma+0x170/0x950 [ 31.977752] split_vma+0xc6/0x110 [ 31.978192] mprotect_fixup+0x8d2/0xb30 [ 31.978687] do_mprotect_pkey+0x87e/0xd40 [ 31.979209] __x64_sys_mprotect+0x78/0xc0 [ 31.979732] do_syscall_64+0x3f/0x90 [ 31.980206] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.980867] [ 31.981083] Freed by task 214: [ 31.981474] kasan_save_stack+0x22/0x50 [ 31.981989] kasan_set_track+0x25/0x30 [ 31.982474] kasan_save_free_info+0x2b/0x50 [ 31.983012] __kasan_slab_free+0x10a/0x190 [ 31.983552] kmem_cache_free+0x10d/0x4d0 [ 31.984061] rcu_core+0x8c8/0x2860 [ 31.984509] __do_softirq+0x1b7/0x7d4 [ 31.984993] [ 31.985203] Last potentially related work creation: [ 31.985790] kasan_save_stack+0x22/0x50 [ 31.986295] __kasan_record_aux_stack+0x8e/0xa0 [ 31.986863] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.987502] remove_vma+0x139/0x170 [ 31.987956] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.988510] do_vmi_munmap+0x1f1/0x2b0 [ 31.989021] __vm_munmap+0x138/0x3a0 [ 31.989492] __x64_sys_munmap+0x59/0x80 [ 31.989994] do_syscall_64+0x3f/0x90 [ 31.990459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.991098] [ 31.991317] Second to last potentially related work creation: [ 31.992014] kasan_save_stack+0x22/0x50 [ 31.992525] __kasan_record_aux_stack+0x8e/0xa0 [ 31.993114] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.993750] remove_vma+0x139/0x170 [ 31.994207] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.994760] do_vmi_munmap+0x1f1/0x2b0 [ 31.995241] __vm_munmap+0x138/0x3a0 [ 31.995711] elf_map+0x26f/0x310 [ 31.996148] load_elf_binary+0x3417/0x5030 [ 31.996690] bprm_execve+0x803/0x1940 [ 31.997176] do_execveat_common+0x734/0x8e0 [ 31.997706] __x64_sys_execve+0x93/0xc0 [ 31.998184] do_syscall_64+0x3f/0x90 [ 31.998650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.999292] [ 31.999509] The buggy address belongs to the object at ffff88800f4443a0 [ 31.999509] which belongs to the cache vm_area_struct of size 168 [ 32.000996] The buggy address is located 88 bytes inside of [ 32.000996] freed 168-byte region [ffff88800f4443a0, ffff88800f444448) [ 32.002408] [ 32.002622] The buggy address belongs to the physical page: [ 32.003293] page:000000000a714616 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf444 [ 32.004372] memcg:ffff88800eb52f01 [ 32.004815] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.005458] page_type: 0xffffffff() [ 32.005910] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 32.006819] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb52f01 [ 32.007720] page dumped because: kasan: bad access detected [ 32.008384] [ 32.008597] Memory state around the buggy address: [ 32.009193] ffff88800f444280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 32.010044] ffff88800f444300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.010903] >ffff88800f444380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.011747] ^ [ 32.012580] ffff88800f444400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.013448] ffff88800f444480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.014287] ================================================================== [ 32.015329] Disabling lock debugging due to kernel taint [ 34.054412] BUG: Bad rss-counter state mm:00000000a0b3ef9b type:MM_FILEPAGES val:33 [ 34.055658] BUG: Bad rss-counter state mm:00000000a0b3ef9b type:MM_ANONPAGES val:22 [ 34.561888] BUG: Bad rss-counter state mm:00000000f2da55f6 type:MM_FILEPAGES val:33 [ 34.563078] BUG: Bad rss-counter state mm:00000000f2da55f6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13235' (ECDSA) to the list of known hosts. 2023/06/20 14:50:01 fuzzer started 2023/06/20 14:50:01 dialing manager at localhost:36067 2023/06/20 14:50:01 checking machine... 2023/06/20 14:50:01 checking revisions... [ 35.236276] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:50:02 testing simple program... [ 35.289568] cgroup: Unknown subsys name 'net' [ 35.355555] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:50:01 Registers: info registers vcpu 0 RAX=fffff940000ec666 RBX=fffff940000ec667 RCX=ffffffff817111cb RDX=0000000000000001 RSI=0000000000000004 RDI=ffffea0000763334 RBP=fffff940000ec666 RSP=ffff88801a167be0 R8 =0000000000000000 R9 =fffff940000ec666 R10=ffffea0000763337 R11=0000000000000000 R12=ffffea0000763300 R13=ffff88800e4c21d0 R14=ffff88801a167db8 R15=ffffea0000763334 RIP=ffffffff8180f0a4 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa1f9697900 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=00007fa1f9c4e618 CR3=000000000f90a000 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=0000000000020f03 RBX=0000000000000001 RCX=ffffffff8180f5ba RDX=0000000000020f12 RSI=00000000000080f5 RDI=ffffffff86139774 RBP=ffff888008e379d0 RSP=ffff888008e37908 R8 =ffffffff8613971a R9 =ffff888008e379b8 R10=0000000000038001 R11=0000000000020f03 R12=ffff888008e379d8 R13=ffff888008e379c0 R14=ffff888008e379b9 R15=ffff888008e37978 RIP=ffffffff81130868 RFL=00000293 [--S-A-C] 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 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=00007f20e3d3fd60 CR3=000000000f2ec000 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=2deb9a683a9277b70d434b7e5cb40194 XMM02=2c67c8bc2e329bc3000000000011b650 XMM03=fb795ef6d65770560000000000122838 XMM04=a80f3548b35bb1ed00000000000ae988 XMM05=db095d22279548520000000000134298 XMM06=c291bd5c70af25b90000000000133c90 XMM07=e042d86d42eb936e0000000000122ab8 XMM08=619bba0c8bb0d6d5000000000011b6b0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000