syzkaller login: [ 68.825935] BUG: Bad rss-counter state mm:00000000fb239b94 type:MM_FILEPAGES val:33 [ 68.827581] BUG: Bad rss-counter state mm:00000000fb239b94 type:MM_ANONPAGES val:22 [ 69.015549] ================================================================== [ 69.016566] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 69.017611] Read of size 8 at addr ffff88800ef2f3f8 by task sshd/228 [ 69.018543] [ 69.018785] CPU: 0 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 69.019768] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 69.020884] Call Trace: [ 69.021245] [ 69.021567] dump_stack_lvl+0x91/0xf0 [ 69.022118] print_report+0xcc/0x620 [ 69.022661] ? __virt_addr_valid+0x102/0x340 [ 69.023279] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.023984] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.024683] kasan_report+0xbe/0xf0 [ 69.025209] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.025895] vma_interval_tree_remove+0xc75/0xec0 [ 69.026569] vma_prepare+0xc54/0x11a0 [ 69.027106] __split_vma+0x5af/0x950 [ 69.027642] ? __pfx___split_vma+0x10/0x10 [ 69.028225] ? find_held_lock+0x2c/0x110 [ 69.028812] do_vmi_align_munmap+0x2ba/0x11f0 [ 69.029440] ? lock_is_held_type+0x9f/0x120 [ 69.030034] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 69.030719] ? mtree_range_walk+0x632/0x900 [ 69.031368] ? mas_walk+0x5c7/0x7c0 [ 69.031903] do_vmi_munmap+0x1f1/0x2b0 [ 69.032453] mmap_region+0x1f9/0x2660 [ 69.032996] ? vm_mmap_pgoff+0x15c/0x3a0 [ 69.033568] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 69.034371] ? __pfx_lock_acquire+0x10/0x10 [ 69.034965] ? __pfx_mmap_region+0x10/0x10 [ 69.035566] ? security_mmap_addr+0x7d/0xa0 [ 69.036147] ? get_unmapped_area+0x1f5/0x3f0 [ 69.036762] do_mmap+0x854/0xf00 [ 69.037254] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.037808] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 69.038438] ksys_mmap_pgoff+0x3af/0x500 [ 69.039006] do_syscall_64+0x3f/0x90 [ 69.039552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.040281] RIP: 0033:0x7ff640934d82 [ 69.040801] 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 [ 69.043179] RSP: 002b:00007ffd893d4138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.044207] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff640934d82 [ 69.045156] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff63fd6e000 [ 69.046105] RBP: 00007ff63fd6e000 R08: 0000000000000009 R09: 0000000000001000 [ 69.047045] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557911a5eb20 [ 69.048006] R13: 00007ffd893d4150 R14: 00007ffd893d4180 R15: 00007ffd893d44e0 [ 69.048966] [ 69.049290] [ 69.049534] Allocated by task 220: [ 69.050019] kasan_save_stack+0x22/0x50 [ 69.050583] kasan_set_track+0x25/0x30 [ 69.051138] __kasan_slab_alloc+0x59/0x70 [ 69.051751] kmem_cache_alloc+0x16b/0x370 [ 69.052328] vm_area_dup+0x20/0x160 [ 69.052834] __split_vma+0x170/0x950 [ 69.053364] split_vma+0xc6/0x110 [ 69.053863] mprotect_fixup+0x8d2/0xb30 [ 69.054426] do_mprotect_pkey+0x87e/0xd40 [ 69.055017] __x64_sys_mprotect+0x78/0xc0 [ 69.055610] do_syscall_64+0x3f/0x90 [ 69.056138] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.056857] [ 69.057105] Freed by task 220: [ 69.057542] kasan_save_stack+0x22/0x50 [ 69.058100] kasan_set_track+0x25/0x30 [ 69.058655] kasan_save_free_info+0x2b/0x50 [ 69.059256] __kasan_slab_free+0x10a/0x190 [ 69.059877] kmem_cache_free+0x10d/0x4d0 [ 69.060456] rcu_core+0x8c8/0x2860 [ 69.060953] __do_softirq+0x1b7/0x7d4 [ 69.061486] [ 69.061731] Last potentially related work creation: [ 69.062394] kasan_save_stack+0x22/0x50 [ 69.062968] __kasan_record_aux_stack+0x8e/0xa0 [ 69.063621] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.064358] remove_vma+0x139/0x170 [ 69.064868] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.065503] do_vmi_munmap+0x1f1/0x2b0 [ 69.066044] __vm_munmap+0x138/0x3a0 [ 69.066575] __x64_sys_munmap+0x59/0x80 [ 69.067145] do_syscall_64+0x3f/0x90 [ 69.067690] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.068431] [ 69.068675] The buggy address belongs to the object at ffff88800ef2f3a0 [ 69.068675] which belongs to the cache vm_area_struct of size 168 [ 69.070340] The buggy address is located 88 bytes inside of [ 69.070340] freed 168-byte region [ffff88800ef2f3a0, ffff88800ef2f448) [ 69.071936] [ 69.072178] The buggy address belongs to the physical page: [ 69.072918] page:00000000cec241c5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef2f [ 69.074150] memcg:ffff88801a088f01 [ 69.074629] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.075365] page_type: 0xffffffff() [ 69.075872] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 69.076912] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a088f01 [ 69.077933] page dumped because: kasan: bad access detected [ 69.078677] [ 69.078918] Memory state around the buggy address: [ 69.079601] ffff88800ef2f280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 69.080580] ffff88800ef2f300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 69.081542] >ffff88800ef2f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 69.082501] ^ [ 69.083461] ffff88800ef2f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 69.084442] ffff88800ef2f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.085408] ================================================================== [ 69.086589] Disabling lock debugging due to kernel taint [ 70.956883] BUG: Bad rss-counter state mm:00000000ba0c5dd8 type:MM_FILEPAGES val:33 [ 70.958160] BUG: Bad rss-counter state mm:00000000ba0c5dd8 type:MM_ANONPAGES val:22 [ 71.369920] BUG: Bad rss-counter state mm:000000005e058816 type:MM_FILEPAGES val:33 [ 71.370734] BUG: Bad rss-counter state mm:000000005e058816 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32452' (ECDSA) to the list of known hosts. 2023/06/20 15:58:55 fuzzer started 2023/06/20 15:58:56 dialing manager at localhost:36067 2023/06/20 15:58:56 checking machine... 2023/06/20 15:58:56 checking revisions... [ 71.997503] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:58:56 testing simple program... [ 72.050061] cgroup: Unknown subsys name 'net' [ 72.117319] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:58:55 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=00007f8ede121000 RCX=ffffffff8175cf40 RDX=ffff888019c79b40 RSI=0000000000000000 RDI=0000000000000007 RBP=000000000fb65007 RSP=ffff8880168bfcf8 R8 =0000000000000007 R9 =0000000000000000 R10=000000000fb65007 R11=0000000000000000 R12=000000000fb65067 R13=ffff88800c524780 R14=ffff8880168bfdf0 R15=000000000c524067 RIP=ffffffff814c0261 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 00007f8edd5cd900 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=00007f8ede121044 CR3=000000000fca4000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=f0278b525d8ef27a622f38dbd34e55ad XMM05=00000000000000000000000000000000 XMM06=732765525d75733d622f3820684e553d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 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=00007fda08d1e000 CR3=000000000e9d6000 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=2035353a38353a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3733 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3733325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a38353a3531203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000