syzkaller login: [ 35.368376] BUG: Bad rss-counter state mm:00000000bec4208a type:MM_FILEPAGES val:33 [ 35.370447] BUG: Bad rss-counter state mm:00000000bec4208a type:MM_ANONPAGES val:22 [ 35.533817] ================================================================== [ 35.534738] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.535683] Read of size 8 at addr ffff88800c57c4e0 by task sshd/219 [ 35.536446] [ 35.536660] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.537611] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.538611] Call Trace: [ 35.538933] [ 35.539237] dump_stack_lvl+0x91/0xf0 [ 35.539724] print_report+0xcc/0x620 [ 35.540220] ? __virt_addr_valid+0x102/0x340 [ 35.540779] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.541395] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.542017] kasan_report+0xbe/0xf0 [ 35.542516] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.543143] vma_interval_tree_remove+0xc75/0xec0 [ 35.543746] vma_prepare+0xc54/0x11a0 [ 35.544226] __split_vma+0x5af/0x950 [ 35.544700] ? __pfx___split_vma+0x10/0x10 [ 35.545229] ? find_held_lock+0x2c/0x110 [ 35.545748] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.546313] ? lock_is_held_type+0x9f/0x120 [ 35.546857] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.547464] ? mtree_range_walk+0x632/0x900 [ 35.548019] ? mas_walk+0x5c7/0x7c0 [ 35.548490] do_vmi_munmap+0x1f1/0x2b0 [ 35.548990] mmap_region+0x1f9/0x2660 [ 35.549474] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.549998] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.550729] ? __pfx_lock_acquire+0x10/0x10 [ 35.551269] ? __pfx_mmap_region+0x10/0x10 [ 35.551809] ? security_mmap_addr+0x7d/0xa0 [ 35.552342] ? get_unmapped_area+0x1f5/0x3f0 [ 35.552890] do_mmap+0x854/0xf00 [ 35.553328] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.553826] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.554396] ksys_mmap_pgoff+0x3af/0x500 [ 35.554904] do_syscall_64+0x3f/0x90 [ 35.555381] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.556023] RIP: 0033:0x7fdf20d90d82 [ 35.556478] 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 [ 35.558623] RSP: 002b:00007ffc40f74e18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.559544] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdf20d90d82 [ 35.560398] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdf201ca000 [ 35.561238] RBP: 00007fdf201ca000 R08: 0000000000000009 R09: 0000000000001000 [ 35.562084] R10: 0000000000000812 R11: 0000000000000206 R12: 000056358b9a5d90 [ 35.562948] R13: 00007ffc40f74e30 R14: 00007ffc40f74e60 R15: 00007ffc40f751c0 [ 35.563813] [ 35.564102] [ 35.564324] Allocated by task 212: [ 35.564769] kasan_save_stack+0x22/0x50 [ 35.565277] kasan_set_track+0x25/0x30 [ 35.565773] __kasan_slab_alloc+0x59/0x70 [ 35.566299] kmem_cache_alloc+0x16b/0x370 [ 35.566834] vm_area_dup+0x20/0x160 [ 35.567296] __split_vma+0x170/0x950 [ 35.567775] split_vma+0xc6/0x110 [ 35.568220] mprotect_fixup+0x8d2/0xb30 [ 35.568729] do_mprotect_pkey+0x87e/0xd40 [ 35.569248] __x64_sys_mprotect+0x78/0xc0 [ 35.569773] do_syscall_64+0x3f/0x90 [ 35.570243] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.570904] [ 35.571123] Freed by task 212: [ 35.571511] kasan_save_stack+0x22/0x50 [ 35.572017] kasan_set_track+0x25/0x30 [ 35.572511] kasan_save_free_info+0x2b/0x50 [ 35.573041] __kasan_slab_free+0x10a/0x190 [ 35.573581] kmem_cache_free+0x10d/0x4d0 [ 35.574090] rcu_core+0x8c8/0x2860 [ 35.574550] __do_softirq+0x1b7/0x7d4 [ 35.575040] [ 35.575258] Last potentially related work creation: [ 35.575846] kasan_save_stack+0x22/0x50 [ 35.576352] __kasan_record_aux_stack+0x8e/0xa0 [ 35.576957] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.577608] remove_vma+0x139/0x170 [ 35.578058] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.578658] do_vmi_munmap+0x1f1/0x2b0 [ 35.579162] __vm_munmap+0x138/0x3a0 [ 35.579634] __x64_sys_munmap+0x59/0x80 [ 35.580148] do_syscall_64+0x3f/0x90 [ 35.580640] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.581285] [ 35.581515] Second to last potentially related work creation: [ 35.582218] kasan_save_stack+0x22/0x50 [ 35.582750] __kasan_record_aux_stack+0x8e/0xa0 [ 35.583341] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.584012] remove_vma+0x139/0x170 [ 35.584481] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.585044] do_vmi_munmap+0x1f1/0x2b0 [ 35.585535] __vm_munmap+0x138/0x3a0 [ 35.586000] elf_map+0x26f/0x310 [ 35.586459] load_elf_binary+0x3417/0x5030 [ 35.586996] bprm_execve+0x803/0x1940 [ 35.587474] do_execveat_common+0x734/0x8e0 [ 35.588006] __x64_sys_execve+0x93/0xc0 [ 35.588507] do_syscall_64+0x3f/0x90 [ 35.588984] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.589629] [ 35.589846] The buggy address belongs to the object at ffff88800c57c488 [ 35.589846] which belongs to the cache vm_area_struct of size 168 [ 35.591357] The buggy address is located 88 bytes inside of [ 35.591357] freed 168-byte region [ffff88800c57c488, ffff88800c57c530) [ 35.592776] [ 35.592994] The buggy address belongs to the physical page: [ 35.593673] page:000000005e846060 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc57c [ 35.594801] memcg:ffff88800d762e01 [ 35.595233] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.595936] page_type: 0xffffffff() [ 35.596388] raw: 0100000000000200 ffff88800879fc80 ffffea00003286c0 dead000000000003 [ 35.597308] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d762e01 [ 35.598214] page dumped because: kasan: bad access detected [ 35.598888] [ 35.599107] Memory state around the buggy address: [ 35.599704] ffff88800c57c380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.600592] ffff88800c57c400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.601468] >ffff88800c57c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.602357] ^ [ 35.603155] ffff88800c57c500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 35.604029] ffff88800c57c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.604899] ================================================================== [ 35.605897] Disabling lock debugging due to kernel taint [ 37.671328] BUG: Bad rss-counter state mm:00000000c5d889df type:MM_FILEPAGES val:33 [ 37.672305] BUG: Bad rss-counter state mm:00000000c5d889df type:MM_ANONPAGES val:22 [ 38.074011] BUG: Bad rss-counter state mm:00000000479d3702 type:MM_FILEPAGES val:33 [ 38.075199] BUG: Bad rss-counter state mm:00000000479d3702 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2885' (ECDSA) to the list of known hosts. 2023/06/20 06:45:49 fuzzer started 2023/06/20 06:45:49 dialing manager at localhost:44161 2023/06/20 06:45:49 checking machine... 2023/06/20 06:45:49 checking revisions... [ 38.738088] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:45:49 testing simple program... [ 38.784794] cgroup: Unknown subsys name 'net' [ 38.878359] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:45:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff87f94640 RCX=0000000000000000 RDX=ffff8880182851c0 RSI=ffffffff83c6316a RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888019f876a0 R8 =0000000000000005 R9 =00000000000000ff R10=00000000000000af R11=00000adc00000adc R12=0000000000000000 R13=00000000000000af R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff814c081b 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 00007f39372bc900 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=00007f3937873618 CR3=000000001a3b6000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000004 RCX=0000000000000100 RDX=ffff888008d751c0 RSI=ffffffff813ae288 RDI=0000000000000004 RBP=dffffc0000000000 RSP=ffff88806cf09e68 R8 =0000000000000000 R9 =0000000000000000 R10=fffffbfff0a81e40 R11=0000000000000000 R12=3ffffffffffffffe R13=fffffbfff0a81e40 R14=ffff888008c58450 R15=000000000009e49f RIP=ffffffff84532a40 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 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=00007fa4f3967010 CR3=000000000c9ce000 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=ba655580ef892fbadd43c5a44d3ba376 XMM02=2c67c8bc2e329bc3000000000011dd30 XMM03=fb795ef6d65770560000000000124708 XMM04=ab10ec667619ffef00000000000ae988 XMM05=dfcdbad4f1609c3700000000001359c8 XMM06=9f6080d1086245590000000000134830 XMM07=e042d86d42eb936e0000000000124988 XMM08=5c70a45bc6da7c14000000000011dd90 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000