[ 54.110720] BUG: Bad rss-counter state mm:000000009f23b347 type:MM_FILEPAGES val:33 [ 54.112440] BUG: Bad rss-counter state mm:000000009f23b347 type:MM_ANONPAGES val:22 [ 54.297699] ================================================================== [ 54.298699] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 54.299726] Read of size 8 at addr ffff888019e70b38 by task sshd/227 [ 54.300663] [ 54.300902] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 54.301863] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 54.302942] Call Trace: [ 54.303292] [ 54.303603] dump_stack_lvl+0x91/0xf0 [ 54.304131] print_report+0xcc/0x620 [ 54.304658] ? __virt_addr_valid+0x102/0x340 [ 54.305258] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.305962] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.306636] kasan_report+0xbe/0xf0 [ 54.307182] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.307852] vma_interval_tree_remove+0xc75/0xec0 [ 54.308503] vma_prepare+0xc54/0x11a0 [ 54.309024] __split_vma+0x5af/0x950 [ 54.309541] ? __pfx___split_vma+0x10/0x10 [ 54.310113] ? find_held_lock+0x2c/0x110 [ 54.310670] do_vmi_align_munmap+0x2ba/0x11f0 [ 54.311282] ? lock_is_held_type+0x9f/0x120 [ 54.311862] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 54.312509] ? mtree_range_walk+0x632/0x900 [ 54.313103] ? mas_walk+0x5c7/0x7c0 [ 54.313624] do_vmi_munmap+0x1f1/0x2b0 [ 54.314157] mmap_region+0x1f9/0x2660 [ 54.314678] ? vm_mmap_pgoff+0x15c/0x3a0 [ 54.315226] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 54.315999] ? __pfx_lock_acquire+0x10/0x10 [ 54.316574] ? __pfx_mmap_region+0x10/0x10 [ 54.317153] ? security_mmap_addr+0x7d/0xa0 [ 54.317749] ? get_unmapped_area+0x1f5/0x3f0 [ 54.318350] do_mmap+0x854/0xf00 [ 54.318824] vm_mmap_pgoff+0x1a6/0x3a0 [ 54.319355] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 54.319957] ksys_mmap_pgoff+0x3af/0x500 [ 54.320501] do_syscall_64+0x3f/0x90 [ 54.321014] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.321722] RIP: 0033:0x7f3daad23d82 [ 54.322221] 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 [ 54.324501] RSP: 002b:00007fff501515d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 54.325481] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3daad23d82 [ 54.326386] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3daa15d000 [ 54.327288] RBP: 00007f3daa15d000 R08: 0000000000000009 R09: 0000000000001000 [ 54.328185] R10: 0000000000000812 R11: 0000000000000206 R12: 00005580eb241b20 [ 54.329090] R13: 00007fff501515f0 R14: 00007fff50151620 R15: 00007fff50151980 [ 54.330010] [ 54.330323] [ 54.330553] Allocated by task 212: [ 54.331016] kasan_save_stack+0x22/0x50 [ 54.331554] kasan_set_track+0x25/0x30 [ 54.332087] __kasan_slab_alloc+0x59/0x70 [ 54.332689] kmem_cache_alloc+0x16b/0x370 [ 54.333303] vm_area_dup+0x20/0x160 [ 54.333822] __split_vma+0x170/0x950 [ 54.334378] split_vma+0xc6/0x110 [ 54.334908] mprotect_fixup+0x8d2/0xb30 [ 54.335506] do_mprotect_pkey+0x87e/0xd40 [ 54.336099] __x64_sys_mprotect+0x78/0xc0 [ 54.336696] do_syscall_64+0x3f/0x90 [ 54.337240] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.337997] [ 54.338240] Freed by task 19: [ 54.338679] kasan_save_stack+0x22/0x50 [ 54.339256] kasan_set_track+0x25/0x30 [ 54.339824] kasan_save_free_info+0x2b/0x50 [ 54.340430] __kasan_slab_free+0x10a/0x190 [ 54.341040] kmem_cache_free+0x10d/0x4d0 [ 54.341627] rcu_core+0x8c8/0x2860 [ 54.342132] __do_softirq+0x1b7/0x7d4 [ 54.342679] [ 54.342924] Last potentially related work creation: [ 54.343596] kasan_save_stack+0x22/0x50 [ 54.344165] __kasan_record_aux_stack+0x8e/0xa0 [ 54.344828] __call_rcu_common.constprop.0+0x6a/0xb90 [ 54.345571] remove_vma+0x139/0x170 [ 54.346098] do_vmi_align_munmap+0xd4a/0x11f0 [ 54.346734] do_vmi_munmap+0x1f1/0x2b0 [ 54.347285] __vm_munmap+0x138/0x3a0 [ 54.347818] __x64_sys_munmap+0x59/0x80 [ 54.348383] do_syscall_64+0x3f/0x90 [ 54.348918] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.349663] [ 54.349906] The buggy address belongs to the object at ffff888019e70ae0 [ 54.349906] which belongs to the cache vm_area_struct of size 168 [ 54.351585] The buggy address is located 88 bytes inside of [ 54.351585] freed 168-byte region [ffff888019e70ae0, ffff888019e70b88) [ 54.353198] [ 54.353452] The buggy address belongs to the physical page: [ 54.354204] page:0000000096c0ed0e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e70 [ 54.355425] memcg:ffff88800da30c01 [ 54.355893] flags: 0x100000000000200(slab|node=0|zone=1) [ 54.356614] page_type: 0xffffffff() [ 54.357125] raw: 0100000000000200 ffff88800879fc80 ffffea0000397d40 dead000000000004 [ 54.358184] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da30c01 [ 54.359193] page dumped because: kasan: bad access detected [ 54.359935] [ 54.360175] Memory state around the buggy address: [ 54.360829] ffff888019e70a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.361800] ffff888019e70a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 54.362762] >ffff888019e70b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.363738] ^ [ 54.364424] ffff888019e70b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 54.365386] ffff888019e70c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 54.366341] ================================================================== [ 54.367533] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 57.191141] BUG: Bad rss-counter state mm:00000000d46e9fe2 type:MM_FILEPAGES val:33 [ 57.192184] BUG: Bad rss-counter state mm:00000000d46e9fe2 type:MM_ANONPAGES val:22 [ 57.738471] BUG: Bad rss-counter state mm:00000000267f590f type:MM_FILEPAGES val:33 [ 57.739645] BUG: Bad rss-counter state mm:00000000267f590f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7357' (ECDSA) to the list of known hosts. 2023/06/19 22:29:43 fuzzer started 2023/06/19 22:29:44 dialing manager at localhost:44161 2023/06/19 22:29:44 checking machine... 2023/06/19 22:29:44 checking revisions... [ 58.397584] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:29:44 testing simple program... [ 58.450240] cgroup: Unknown subsys name 'net' [ 58.509694] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:29:20 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff83698eb6 RDX=fffffbfff0ba77db RSI=0000000000000001 RDI=0000000000000000 RBP=ffff88800ebe73c0 RSP=ffff888019c97988 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=00000000000000e8 R13=0000000000000000 R14=ffff888019c97e70 R15=00000000000000e8 RIP=ffffffff814c0324 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 00007fec6ea55900 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=00007ffeb8f76000 CR3=000000000fbb6000 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=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 info registers vcpu 1 RAX=00000000058e011d RBX=ffff88800e833940 RCX=ffff88800e833000 RDX=0000000000000080 RSI=ffff88800e833850 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff88806cf09da0 R8 =0000000000000130 R9 =0000000000000000 R10=0000000000000008 R11=0000000000000000 R12=ffff88800844f780 R13=ffffea0000362680 R14=ffffffff8186b9c5 R15=ffff88800dd19300 RIP=ffffffff8180ee70 RFL=00000282 [--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 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=00007f822b612b20 CR3=000000000e4de000 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=2033343a39323a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a39323a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000