syzkaller login: [ 56.340904] BUG: Bad rss-counter state mm:0000000012825f99 type:MM_FILEPAGES val:33 [ 56.342194] BUG: Bad rss-counter state mm:0000000012825f99 type:MM_ANONPAGES val:22 [ 56.504757] ================================================================== [ 56.505833] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 56.506951] Read of size 8 at addr ffff88801a021ed8 by task sshd/220 [ 56.507981] [ 56.508220] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 56.509114] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 56.510118] Call Trace: [ 56.510441] [ 56.510727] dump_stack_lvl+0x91/0xf0 [ 56.511219] print_report+0xcc/0x620 [ 56.511704] ? __virt_addr_valid+0x102/0x340 [ 56.512266] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.512903] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.513534] kasan_report+0xbe/0xf0 [ 56.514011] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.514646] vma_interval_tree_remove+0xc75/0xec0 [ 56.515253] vma_prepare+0xc54/0x11a0 [ 56.515738] __split_vma+0x5af/0x950 [ 56.516226] ? __pfx___split_vma+0x10/0x10 [ 56.516800] ? find_held_lock+0x2c/0x110 [ 56.517327] do_vmi_align_munmap+0x2ba/0x11f0 [ 56.517901] ? lock_is_held_type+0x9f/0x120 [ 56.518442] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 56.519060] ? mtree_range_walk+0x632/0x900 [ 56.519617] ? mas_walk+0x5c7/0x7c0 [ 56.520100] do_vmi_munmap+0x1f1/0x2b0 [ 56.520607] mmap_region+0x1f9/0x2660 [ 56.521095] ? vm_mmap_pgoff+0x15c/0x3a0 [ 56.521610] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 56.522336] ? __pfx_lock_acquire+0x10/0x10 [ 56.522876] ? __pfx_mmap_region+0x10/0x10 [ 56.523417] ? security_mmap_addr+0x7d/0xa0 [ 56.523957] ? get_unmapped_area+0x1f5/0x3f0 [ 56.524536] do_mmap+0x854/0xf00 [ 56.524981] vm_mmap_pgoff+0x1a6/0x3a0 [ 56.525484] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 56.526047] ksys_mmap_pgoff+0x3af/0x500 [ 56.526562] do_syscall_64+0x3f/0x90 [ 56.527048] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.527709] RIP: 0033:0x7faf1c4d1d82 [ 56.528170] 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 [ 56.530347] RSP: 002b:00007ffcd7726498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 56.531264] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faf1c4d1d82 [ 56.532144] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faf1b90b000 [ 56.533041] RBP: 00007faf1b90b000 R08: 0000000000000009 R09: 0000000000001000 [ 56.533903] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a493be5f60 [ 56.534752] R13: 00007ffcd77264b0 R14: 00007ffcd77264e0 R15: 00007ffcd7726840 [ 56.535608] [ 56.535895] [ 56.536110] Allocated by task 213: [ 56.536552] kasan_save_stack+0x22/0x50 [ 56.537061] kasan_set_track+0x25/0x30 [ 56.537552] __kasan_slab_alloc+0x59/0x70 [ 56.538068] kmem_cache_alloc+0x16b/0x370 [ 56.538591] vm_area_dup+0x20/0x160 [ 56.539041] __split_vma+0x170/0x950 [ 56.539510] split_vma+0xc6/0x110 [ 56.539955] mprotect_fixup+0x8d2/0xb30 [ 56.540478] do_mprotect_pkey+0x87e/0xd40 [ 56.540987] __x64_sys_mprotect+0x78/0xc0 [ 56.541504] do_syscall_64+0x3f/0x90 [ 56.541973] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.542614] [ 56.542826] Freed by task 213: [ 56.543216] kasan_save_stack+0x22/0x50 [ 56.543711] kasan_set_track+0x25/0x30 [ 56.544202] kasan_save_free_info+0x2b/0x50 [ 56.544751] __kasan_slab_free+0x10a/0x190 [ 56.545276] kmem_cache_free+0x10d/0x4d0 [ 56.545778] rcu_core+0x8c8/0x2860 [ 56.546218] __do_softirq+0x1b7/0x7d4 [ 56.546691] [ 56.546904] Last potentially related work creation: [ 56.547489] kasan_save_stack+0x22/0x50 [ 56.547985] __kasan_record_aux_stack+0x8e/0xa0 [ 56.548563] __call_rcu_common.constprop.0+0x6a/0xb90 [ 56.549204] remove_vma+0x139/0x170 [ 56.549650] do_vmi_align_munmap+0xd4a/0x11f0 [ 56.550205] do_vmi_munmap+0x1f1/0x2b0 [ 56.550696] __vm_munmap+0x138/0x3a0 [ 56.551157] __x64_sys_munmap+0x59/0x80 [ 56.551653] do_syscall_64+0x3f/0x90 [ 56.552121] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.552783] [ 56.552997] The buggy address belongs to the object at ffff88801a021e80 [ 56.552997] which belongs to the cache vm_area_struct of size 168 [ 56.554444] The buggy address is located 88 bytes inside of [ 56.554444] freed 168-byte region [ffff88801a021e80, ffff88801a021f28) [ 56.555847] [ 56.556064] The buggy address belongs to the physical page: [ 56.556737] page:000000001a448d49 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a021 [ 56.557836] memcg:ffff88800ef8b401 [ 56.558266] flags: 0x100000000000200(slab|node=0|zone=1) [ 56.558914] page_type: 0xffffffff() [ 56.559367] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 56.560290] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef8b401 [ 56.561209] page dumped because: kasan: bad access detected [ 56.561873] [ 56.562092] Memory state around the buggy address: [ 56.562682] ffff88801a021d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 56.563552] ffff88801a021e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 56.564451] >ffff88801a021e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 56.565307] ^ [ 56.566037] ffff88801a021f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 56.566891] ffff88801a021f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 56.567740] ================================================================== [ 56.568712] Disabling lock debugging due to kernel taint [ 59.249371] BUG: Bad rss-counter state mm:00000000feb1204b type:MM_FILEPAGES val:33 [ 59.250409] BUG: Bad rss-counter state mm:00000000feb1204b type:MM_ANONPAGES val:22 [ 59.690135] BUG: Bad rss-counter state mm:00000000452bae35 type:MM_FILEPAGES val:33 [ 59.691319] BUG: Bad rss-counter state mm:00000000452bae35 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56970' (ECDSA) to the list of known hosts. 2023/06/20 03:33:58 fuzzer started 2023/06/20 03:33:59 dialing manager at localhost:44161 2023/06/20 03:33:59 checking machine... 2023/06/20 03:33:59 checking revisions... [ 60.409693] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:33:59 testing simple program... [ 60.460439] cgroup: Unknown subsys name 'net' [ 60.507542] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:33:32 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffff88800d82bbe0 RCX=ffffffff812e0423 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff88800d82bbe0 RBP=ffff88800d82bbe0 RSP=ffff88806ce09da8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800d82bc70 R13=ffff88800d82bc20 R14=ffffffff818d9dc6 R15=ffff88800eac5180 RIP=ffffffff8180fd28 RFL=00000046 [---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 00007fb6cfdbb900 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=00007fb6cf23a850 CR3=000000000d5c4000 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=b3285ca56c489dff000000000010b838 XMM01=f4b38e723ce117abd64ef086caaa37c5 XMM02=ec2efd57dc4c00df000000000011b8e0 XMM03=9a8f57bf5b4f6a85000000000011b9b0 XMM04=152fe8880f69694500000000000ae988 XMM05=19e9129bd510f2350000000000132bd8 XMM06=8ee2106ddb22552700000000001312d8 XMM07=e042d86d42eb936e00000000001232f0 XMM08=9a8f57bf5b4f6a85000000000011b9b0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000000d RBX=0000000000000001 RCX=ffffffff84506c7e RDX=000000000000000d RSI=ffffffff864b0222 RDI=ffffffff8604d2b8 RBP=ffffffff8604d2b8 RSP=ffff888014517770 R8 =ffffffff864b0222 R9 =ffff888014517868 R10=0000000000038001 R11=00000000000b4fb9 R12=ffffffff8604d2e8 R13=ffffffff8604d2b8 R14=ffffffff8604d2b8 R15=dffffc0000000000 RIP=ffffffff8112fc49 RFL=00000283 [--S---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 00007fd25b52e900 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=00007fffcc6e2000 CR3=000000000ca60000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000