syzkaller login: [ 106.330818] BUG: Bad rss-counter state mm:00000000c3e91501 type:MM_FILEPAGES val:33 [ 106.333476] BUG: Bad rss-counter state mm:00000000c3e91501 type:MM_ANONPAGES val:22 [ 106.493243] ================================================================== [ 106.494225] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 106.495195] Read of size 8 at addr ffff888019a806b0 by task sshd/228 [ 106.495980] [ 106.496206] CPU: 1 PID: 228 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 106.497410] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 106.498408] Call Trace: [ 106.498748] <TASK> [ 106.499034] dump_stack_lvl+0x91/0xf0 [ 106.499519] print_report+0xcc/0x620 [ 106.500004] ? __virt_addr_valid+0x102/0x340 [ 106.500563] ? vma_interval_tree_remove+0xc75/0xec0 [ 106.501202] ? vma_interval_tree_remove+0xc75/0xec0 [ 106.501841] kasan_report+0xbe/0xf0 [ 106.502341] ? vma_interval_tree_remove+0xc75/0xec0 [ 106.502987] vma_interval_tree_remove+0xc75/0xec0 [ 106.503598] vma_prepare+0xc54/0x11a0 [ 106.504097] __split_vma+0x5af/0x950 [ 106.504583] ? __pfx___split_vma+0x10/0x10 [ 106.505125] ? find_held_lock+0x2c/0x110 [ 106.505662] do_vmi_align_munmap+0x2ba/0x11f0 [ 106.506236] ? lock_is_held_type+0x9f/0x120 [ 106.506776] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 106.507406] ? mtree_range_walk+0x632/0x900 [ 106.507965] ? mas_walk+0x5c7/0x7c0 [ 106.508453] do_vmi_munmap+0x1f1/0x2b0 [ 106.508947] mmap_region+0x1f9/0x2660 [ 106.509425] ? vm_mmap_pgoff+0x15c/0x3a0 [ 106.509941] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 106.510708] ? __pfx_lock_acquire+0x10/0x10 [ 106.511255] ? __pfx_mmap_region+0x10/0x10 [ 106.511799] ? security_mmap_addr+0x7d/0xa0 [ 106.512339] ? get_unmapped_area+0x1f5/0x3f0 [ 106.512905] do_mmap+0x854/0xf00 [ 106.513349] vm_mmap_pgoff+0x1a6/0x3a0 [ 106.513843] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 106.514416] ksys_mmap_pgoff+0x3af/0x500 [ 106.514927] do_syscall_64+0x3f/0x90 [ 106.515406] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 106.516051] RIP: 0033:0x7f523e371d82 [ 106.516508] 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 [ 106.518632] RSP: 002b:00007ffeb9e6e368 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 106.519599] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f523e371d82 [ 106.520470] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f523d7ab000 [ 106.521352] RBP: 00007f523d7ab000 R08: 0000000000000009 R09: 0000000000001000 [ 106.522244] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f2bae3f70 [ 106.523117] R13: 00007ffeb9e6e380 R14: 00007ffeb9e6e3b0 R15: 00007ffeb9e6e710 [ 106.523983] </TASK> [ 106.524277] [ 106.524499] Allocated by task 220: [ 106.524938] kasan_save_stack+0x22/0x50 [ 106.525458] kasan_set_track+0x25/0x30 [ 106.525960] __kasan_slab_alloc+0x59/0x70 [ 106.526527] kmem_cache_alloc+0x16b/0x370 [ 106.527047] vm_area_dup+0x20/0x160 [ 106.527506] __split_vma+0x170/0x950 [ 106.527984] split_vma+0xc6/0x110 [ 106.528428] mprotect_fixup+0x8d2/0xb30 [ 106.528937] do_mprotect_pkey+0x87e/0xd40 [ 106.529466] __x64_sys_mprotect+0x78/0xc0 [ 106.530001] do_syscall_64+0x3f/0x90 [ 106.530500] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 106.531162] [ 106.531383] Freed by task 220: [ 106.531789] kasan_save_stack+0x22/0x50 [ 106.532299] kasan_set_track+0x25/0x30 [ 106.532799] kasan_save_free_info+0x2b/0x50 [ 106.533365] __kasan_slab_free+0x10a/0x190 [ 106.533905] kmem_cache_free+0x10d/0x4d0 [ 106.534421] rcu_core+0x8c8/0x2860 [ 106.534865] __do_softirq+0x1b7/0x7d4 [ 106.535339] [ 106.535557] Last potentially related work creation: [ 106.536136] kasan_save_stack+0x22/0x50 [ 106.536631] __kasan_record_aux_stack+0x8e/0xa0 [ 106.537268] __call_rcu_common.constprop.0+0x6a/0xb90 [ 106.537909] remove_vma+0x139/0x170 [ 106.538379] do_vmi_align_munmap+0xd4a/0x11f0 [ 106.538939] do_vmi_munmap+0x1f1/0x2b0 [ 106.539431] __vm_munmap+0x138/0x3a0 [ 106.539901] __x64_sys_munmap+0x59/0x80 [ 106.540392] do_syscall_64+0x3f/0x90 [ 106.540863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 106.541501] [ 106.541715] The buggy address belongs to the object at ffff888019a80658 [ 106.541715] which belongs to the cache vm_area_struct of size 168 [ 106.543188] The buggy address is located 88 bytes inside of [ 106.543188] freed 168-byte region [ffff888019a80658, ffff888019a80700) [ 106.544581] [ 106.544798] The buggy address belongs to the physical page: [ 106.545459] page:000000005fae531a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19a80 [ 106.546569] memcg:ffff888015b91401 [ 106.546990] flags: 0x100000000000200(slab|node=0|zone=1) [ 106.547639] page_type: 0xffffffff() [ 106.548089] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 106.549005] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015b91401 [ 106.549903] page dumped because: kasan: bad access detected [ 106.550566] [ 106.550780] Memory state around the buggy address: [ 106.551359] ffff888019a80580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 106.552210] ffff888019a80600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 106.553061] >ffff888019a80680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 106.553906] ^ [ 106.554503] ffff888019a80700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 106.555371] ffff888019a80780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 106.556218] ================================================================== [ 106.557212] Disabling lock debugging due to kernel taint [ 108.243053] BUG: Bad rss-counter state mm:00000000fea0a0bb type:MM_FILEPAGES val:33 [ 108.243810] BUG: Bad rss-counter state mm:00000000fea0a0bb type:MM_ANONPAGES val:22 [ 108.706577] BUG: Bad rss-counter state mm:00000000cda3adf4 type:MM_FILEPAGES val:33 [ 108.707612] BUG: Bad rss-counter state mm:00000000cda3adf4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24938' (ECDSA) to the list of known hosts. 2023/06/20 05:25:18 fuzzer started 2023/06/20 05:25:18 dialing manager at localhost:44161 2023/06/20 05:25:18 checking machine... 2023/06/20 05:25:18 checking revisions... [ 109.475186] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:25:18 testing simple program... [ 109.513870] cgroup: Unknown subsys name 'net' [ 109.552279] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:24:40 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f1656e9bac0 CR3=0000000009530000 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=2038313a35323a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3733 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3733325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a35323a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11002b57e01 RCX=ffffffff812d8ec3 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff888015abeff0 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180fd28 RFL=00000256 [---ZAP-] 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 00007f4637470900 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=00007fff83e77000 CR3=000000000ed52000 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