syzkaller login: [ 29.150921] BUG: Bad rss-counter state mm:00000000ab6b97b5 type:MM_FILEPAGES val:33 [ 29.152398] BUG: Bad rss-counter state mm:00000000ab6b97b5 type:MM_ANONPAGES val:22 [ 29.306739] ================================================================== [ 29.307647] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.308592] Read of size 8 at addr ffff8880167d5058 by task sshd/220 [ 29.309469] [ 29.309698] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.310564] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.311550] Call Trace: [ 29.311882] [ 29.312163] dump_stack_lvl+0x91/0xf0 [ 29.312658] print_report+0xcc/0x620 [ 29.313142] ? __virt_addr_valid+0x102/0x340 [ 29.313719] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.314341] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.314949] kasan_report+0xbe/0xf0 [ 29.315426] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.316045] vma_interval_tree_remove+0xc75/0xec0 [ 29.316645] vma_prepare+0xc54/0x11a0 [ 29.317125] __split_vma+0x5af/0x950 [ 29.317608] ? __pfx___split_vma+0x10/0x10 [ 29.318142] ? find_held_lock+0x2c/0x110 [ 29.318665] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.319226] ? lock_is_held_type+0x9f/0x120 [ 29.319768] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.320370] ? mtree_range_walk+0x632/0x900 [ 29.320921] ? mas_walk+0x5c7/0x7c0 [ 29.321400] do_vmi_munmap+0x1f1/0x2b0 [ 29.321902] mmap_region+0x1f9/0x2660 [ 29.322385] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.322901] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.323609] ? __pfx_lock_acquire+0x10/0x10 [ 29.324139] ? __pfx_mmap_region+0x10/0x10 [ 29.324671] ? security_mmap_addr+0x7d/0xa0 [ 29.325199] ? get_unmapped_area+0x1f5/0x3f0 [ 29.325766] do_mmap+0x854/0xf00 [ 29.326211] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.326707] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.327268] ksys_mmap_pgoff+0x3af/0x500 [ 29.327775] do_syscall_64+0x3f/0x90 [ 29.328256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.328904] RIP: 0033:0x7f97da5b4d82 [ 29.329359] 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 [ 29.331502] RSP: 002b:00007fffc3c66a78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.332405] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f97da5b4d82 [ 29.333255] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f97d99ee000 [ 29.334118] RBP: 00007f97d99ee000 R08: 0000000000000009 R09: 0000000000001000 [ 29.334963] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559e58b3eb20 [ 29.335809] R13: 00007fffc3c66a90 R14: 00007fffc3c66ac0 R15: 00007fffc3c66e20 [ 29.336666] [ 29.336955] [ 29.337170] Allocated by task 212: [ 29.337623] kasan_save_stack+0x22/0x50 [ 29.338128] kasan_set_track+0x25/0x30 [ 29.338624] __kasan_slab_alloc+0x59/0x70 [ 29.339144] kmem_cache_alloc+0x16b/0x370 [ 29.339658] vm_area_dup+0x20/0x160 [ 29.340111] __split_vma+0x170/0x950 [ 29.340579] split_vma+0xc6/0x110 [ 29.341028] mprotect_fixup+0x8d2/0xb30 [ 29.341527] do_mprotect_pkey+0x87e/0xd40 [ 29.342065] __x64_sys_mprotect+0x78/0xc0 [ 29.342591] do_syscall_64+0x3f/0x90 [ 29.343067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.343707] [ 29.343924] Freed by task 19: [ 29.344307] kasan_save_stack+0x22/0x50 [ 29.344806] kasan_set_track+0x25/0x30 [ 29.345300] kasan_save_free_info+0x2b/0x50 [ 29.345850] __kasan_slab_free+0x10a/0x190 [ 29.346378] kmem_cache_free+0x10d/0x4d0 [ 29.346911] rcu_core+0x8c8/0x2860 [ 29.347366] __do_softirq+0x1b7/0x7d4 [ 29.347857] [ 29.348076] Last potentially related work creation: [ 29.348697] kasan_save_stack+0x22/0x50 [ 29.349227] __kasan_record_aux_stack+0x8e/0xa0 [ 29.349839] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.350511] remove_vma+0x139/0x170 [ 29.350986] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.351562] do_vmi_munmap+0x1f1/0x2b0 [ 29.352074] __vm_munmap+0x138/0x3a0 [ 29.352564] __x64_sys_munmap+0x59/0x80 [ 29.353060] do_syscall_64+0x3f/0x90 [ 29.353533] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.354192] [ 29.354408] The buggy address belongs to the object at ffff8880167d5000 [ 29.354408] which belongs to the cache vm_area_struct of size 168 [ 29.355939] The buggy address is located 88 bytes inside of [ 29.355939] freed 168-byte region [ffff8880167d5000, ffff8880167d50a8) [ 29.357348] [ 29.357570] The buggy address belongs to the physical page: [ 29.358233] page:000000008c5e519d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x167d5 [ 29.359325] memcg:ffff88801678d501 [ 29.359751] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.360395] page_type: 0xffffffff() [ 29.360851] raw: 0100000000000200 ffff8880087a0c80 ffffea00005a5740 dead000000000006 [ 29.361788] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801678d501 [ 29.362700] page dumped because: kasan: bad access detected [ 29.363402] [ 29.363620] Memory state around the buggy address: [ 29.364229] ffff8880167d4f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.365108] ffff8880167d4f80: 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.366001] >ffff8880167d5000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.366881] ^ [ 29.367664] ffff8880167d5080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 29.368592] ffff8880167d5100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.369483] ================================================================== [ 29.370507] Disabling lock debugging due to kernel taint [ 31.284850] BUG: Bad rss-counter state mm:0000000017c495dd type:MM_FILEPAGES val:33 [ 31.286129] BUG: Bad rss-counter state mm:0000000017c495dd type:MM_ANONPAGES val:22 [ 31.859313] BUG: Bad rss-counter state mm:00000000fabccc02 type:MM_FILEPAGES val:33 [ 31.860483] BUG: Bad rss-counter state mm:00000000fabccc02 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10002' (ECDSA) to the list of known hosts. 2023/06/20 21:41:17 fuzzer started 2023/06/20 21:41:17 dialing manager at localhost:36067 2023/06/20 21:41:17 checking machine... 2023/06/20 21:41:17 checking revisions... [ 32.529309] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:41:17 testing simple program... [ 32.581919] cgroup: Unknown subsys name 'net' [ 32.661512] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:41:16 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11002ceef12 RCX=0000000000000000 RDX=ffff88800dc5b680 RSI=ffffffff81b3de10 RDI=0000000000000001 RBP=ffff888019aabe20 RSP=ffff888016777850 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=ffff88801997ed68 R13=0000000000000001 R14=0000000000000001 R15=ffff88800f4f8000 RIP=ffffffff8135b935 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 00007fa63ffff700 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=00007f1d4c036630 CR3=000000000f178000 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=2036313a31343a3132203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a31343a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016439b40 RSI=ffffffff81f30dd4 RDI=0000000000000004 RBP=ffff88801c97fc50 RSP=ffff88801c97f980 R8 =0000000000000004 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000000 R14=ffff88801c97fc48 R15=0000000000001032 RIP=ffffffff814c086b 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd4d8a9f900 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=00007fd4d9056618 CR3=000000000e250000 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=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