syzkaller login: [ 29.969552] BUG: Bad rss-counter state mm:00000000712738af type:MM_FILEPAGES val:33 [ 29.970379] BUG: Bad rss-counter state mm:00000000712738af type:MM_ANONPAGES val:22 [ 30.003580] ================================================================== [ 30.004242] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.005040] Read of size 8 at addr ffff88801a15f4e0 by task sshd/225 [ 30.005625] [ 30.005775] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.006348] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.006961] Call Trace: [ 30.007162] [ 30.007497] dump_stack_lvl+0x91/0xf0 [ 30.007830] print_report+0xcc/0x620 [ 30.008146] ? __virt_addr_valid+0x102/0x340 [ 30.008506] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.008921] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.009329] kasan_report+0xbe/0xf0 [ 30.009640] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.010058] vma_interval_tree_remove+0xc75/0xec0 [ 30.010497] vma_prepare+0xc54/0x11a0 [ 30.010807] __split_vma+0x5af/0x950 [ 30.011125] ? __pfx___split_vma+0x10/0x10 [ 30.011469] ? find_held_lock+0x2c/0x110 [ 30.011824] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.012199] ? lock_is_held_type+0x9f/0x120 [ 30.012538] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.012924] ? mtree_range_walk+0x632/0x900 [ 30.013272] ? mas_walk+0x5c7/0x7c0 [ 30.013568] do_vmi_munmap+0x1f1/0x2b0 [ 30.013880] mmap_region+0x1f9/0x2660 [ 30.014203] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.014529] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.014977] ? __pfx_lock_acquire+0x10/0x10 [ 30.015315] ? __pfx_mmap_region+0x10/0x10 [ 30.015648] ? security_mmap_addr+0x7d/0xa0 [ 30.016001] ? get_unmapped_area+0x1f5/0x3f0 [ 30.016374] do_mmap+0x854/0xf00 [ 30.016666] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.016973] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.017337] ksys_mmap_pgoff+0x3af/0x500 [ 30.017674] do_syscall_64+0x3f/0x90 [ 30.018000] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.018465] RIP: 0033:0x7f9215404d82 [ 30.018766] 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 [ 30.020150] RSP: 002b:00007ffc0e872e38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.020755] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9215404d82 [ 30.021295] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f921483e000 [ 30.021857] RBP: 00007f921483e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.022443] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562cfee8df60 [ 30.022995] R13: 00007ffc0e872e50 R14: 00007ffc0e872e80 R15: 00007ffc0e8731e0 [ 30.023571] [ 30.023775] [ 30.023928] Allocated by task 218: [ 30.024251] kasan_save_stack+0x22/0x50 [ 30.024604] kasan_set_track+0x25/0x30 [ 30.024936] __kasan_slab_alloc+0x59/0x70 [ 30.025283] kmem_cache_alloc+0x16b/0x370 [ 30.025615] vm_area_dup+0x20/0x160 [ 30.025932] __split_vma+0x170/0x950 [ 30.026307] split_vma+0xc6/0x110 [ 30.026594] mprotect_fixup+0x8d2/0xb30 [ 30.026929] do_mprotect_pkey+0x87e/0xd40 [ 30.027281] __x64_sys_mprotect+0x78/0xc0 [ 30.027632] do_syscall_64+0x3f/0x90 [ 30.027952] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.028374] [ 30.028520] Freed by task 203: [ 30.028780] kasan_save_stack+0x22/0x50 [ 30.029119] kasan_set_track+0x25/0x30 [ 30.029474] kasan_save_free_info+0x2b/0x50 [ 30.029858] __kasan_slab_free+0x10a/0x190 [ 30.030251] kmem_cache_free+0x10d/0x4d0 [ 30.030624] rcu_core+0x8c8/0x2860 [ 30.030951] __do_softirq+0x1b7/0x7d4 [ 30.031246] [ 30.031378] Last potentially related work creation: [ 30.031738] kasan_save_stack+0x22/0x50 [ 30.032075] __kasan_record_aux_stack+0x8e/0xa0 [ 30.032450] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.032884] remove_vma+0x139/0x170 [ 30.033204] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.033610] do_vmi_munmap+0x1f1/0x2b0 [ 30.033936] __vm_munmap+0x138/0x3a0 [ 30.034270] __x64_sys_munmap+0x59/0x80 [ 30.034621] do_syscall_64+0x3f/0x90 [ 30.034941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.035359] [ 30.035500] The buggy address belongs to the object at ffff88801a15f488 [ 30.035500] which belongs to the cache vm_area_struct of size 168 [ 30.036462] The buggy address is located 88 bytes inside of [ 30.036462] freed 168-byte region [ffff88801a15f488, ffff88801a15f530) [ 30.037433] [ 30.037580] The buggy address belongs to the physical page: [ 30.038020] page:000000008d48c593 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a15f [ 30.038837] memcg:ffff88801a150601 [ 30.039132] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.039581] page_type: 0xffffffff() [ 30.039867] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.040470] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a150601 [ 30.041106] page dumped because: kasan: bad access detected [ 30.041565] [ 30.041718] Memory state around the buggy address: [ 30.042128] ffff88801a15f380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.042744] ffff88801a15f400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.043362] >ffff88801a15f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.043959] ^ [ 30.044480] ffff88801a15f500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.045073] ffff88801a15f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.045682] ================================================================== [ 30.046452] Disabling lock debugging due to kernel taint [ 32.008158] BUG: Bad rss-counter state mm:000000004c6ec261 type:MM_FILEPAGES val:33 [ 32.009331] BUG: Bad rss-counter state mm:000000004c6ec261 type:MM_ANONPAGES val:22 [ 32.381099] BUG: Bad rss-counter state mm:00000000fb99094b type:MM_FILEPAGES val:33 [ 32.381822] BUG: Bad rss-counter state mm:00000000fb99094b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15184' (ECDSA) to the list of known hosts. 2023/06/21 08:33:27 fuzzer started 2023/06/21 08:33:27 dialing manager at localhost:36067 2023/06/21 08:33:27 checking machine... 2023/06/21 08:33:27 checking revisions... [ 32.958728] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:33:28 testing simple program... [ 33.001306] cgroup: Unknown subsys name 'net' [ 33.039494] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:33:27 Registers: info registers vcpu 0 RAX=0000000000000286 RBX=ffff88800dd1f5f0 RCX=ffff88806ca620b8 RDX=0000000000000000 RSI=ffff88800dd1f5f0 RDI=ffff88800844f780 RBP=ffff88800844f780 RSP=ffff888008d9fce0 R8 =0000000023c0916b R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000000128 R12=ffff88800844f780 R13=ffffea00003747c0 R14=ffffffff813782f8 R15=ffff88800dd1f670 RIP=ffffffff818106b2 RFL=00000286 [--S--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 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=00007f49e61dafd0 CR3=000000000d57a000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=eac7495ac161c64c00000000000ae988 XMM05=aa454ccc5e5782dc00000000001337b0 XMM06=ae9b264101391a5b00000000001325a0 XMM07=fb795ef6d65770560000000000122838 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000200 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff88800feff300 RSP=ffff88800feff240 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffffffff81806f71 R12=ffff88800844f780 R13=ffff88806cf3de20 R14=ffff88806cf3de20 R15=ffff88806cf3de00 RIP=ffffffff81806fdf RFL=00000082 [--S----] 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 00007f99144d9900 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=00007f99144b8020 CR3=000000000b3ac000 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