[ 88.145892] BUG: Bad rss-counter state mm:000000001c6b6aff type:MM_FILEPAGES val:33 [ 88.146589] BUG: Bad rss-counter state mm:000000001c6b6aff type:MM_ANONPAGES val:22 [ 88.284877] ================================================================== [ 88.285825] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 88.286765] Read of size 8 at addr ffff888016aedc20 by task sshd/227 [ 88.287545] [ 88.287766] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 88.288737] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 88.289741] Call Trace: [ 88.290062] [ 88.290367] dump_stack_lvl+0x91/0xf0 [ 88.290866] print_report+0xcc/0x620 [ 88.291357] ? __virt_addr_valid+0x102/0x340 [ 88.291904] ? vma_interval_tree_remove+0xc75/0xec0 [ 88.292517] ? vma_interval_tree_remove+0xc75/0xec0 [ 88.293132] kasan_report+0xbe/0xf0 [ 88.293607] ? vma_interval_tree_remove+0xc75/0xec0 [ 88.294241] vma_interval_tree_remove+0xc75/0xec0 [ 88.294844] vma_prepare+0xc54/0x11a0 [ 88.295315] __split_vma+0x5af/0x950 [ 88.295795] ? __pfx___split_vma+0x10/0x10 [ 88.296322] ? find_held_lock+0x2c/0x110 [ 88.296847] do_vmi_align_munmap+0x2ba/0x11f0 [ 88.297410] ? lock_is_held_type+0x9f/0x120 [ 88.297952] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 88.298555] ? mtree_range_walk+0x632/0x900 [ 88.299096] ? mas_walk+0x5c7/0x7c0 [ 88.299569] do_vmi_munmap+0x1f1/0x2b0 [ 88.300066] mmap_region+0x1f9/0x2660 [ 88.300556] ? vm_mmap_pgoff+0x15c/0x3a0 [ 88.301065] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 88.301797] ? __pfx_lock_acquire+0x10/0x10 [ 88.302337] ? __pfx_mmap_region+0x10/0x10 [ 88.302868] ? security_mmap_addr+0x7d/0xa0 [ 88.303398] ? get_unmapped_area+0x1f5/0x3f0 [ 88.303947] do_mmap+0x854/0xf00 [ 88.304389] vm_mmap_pgoff+0x1a6/0x3a0 [ 88.304888] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 88.305451] ksys_mmap_pgoff+0x3af/0x500 [ 88.305969] do_syscall_64+0x3f/0x90 [ 88.306445] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 88.307086] RIP: 0033:0x7f5e8b270d82 [ 88.307536] 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 [ 88.309637] RSP: 002b:00007ffcb4585dd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 88.310557] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5e8b270d82 [ 88.311393] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5e8a6aa000 [ 88.312237] RBP: 00007f5e8a6aa000 R08: 0000000000000009 R09: 0000000000001000 [ 88.313082] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b8599beec0 [ 88.313936] R13: 00007ffcb4585df0 R14: 00007ffcb4585e20 R15: 00007ffcb4586180 [ 88.314794] [ 88.315090] [ 88.315302] Allocated by task 216: [ 88.315886] kasan_save_stack+0x22/0x50 [ 88.316440] kasan_set_track+0x25/0x30 [ 88.316937] __kasan_slab_alloc+0x59/0x70 [ 88.317460] kmem_cache_alloc+0x16b/0x370 [ 88.317978] vm_area_dup+0x20/0x160 [ 88.318430] __split_vma+0x170/0x950 [ 88.318893] split_vma+0xc6/0x110 [ 88.319330] mprotect_fixup+0x8d2/0xb30 [ 88.319831] do_mprotect_pkey+0x87e/0xd40 [ 88.320347] __x64_sys_mprotect+0x78/0xc0 [ 88.320869] do_syscall_64+0x3f/0x90 [ 88.321340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 88.321994] [ 88.322212] Freed by task 216: [ 88.322602] kasan_save_stack+0x22/0x50 [ 88.323098] kasan_set_track+0x25/0x30 [ 88.323589] kasan_save_free_info+0x2b/0x50 [ 88.324111] __kasan_slab_free+0x10a/0x190 [ 88.324645] kmem_cache_free+0x10d/0x4d0 [ 88.325151] rcu_core+0x8c8/0x2860 [ 88.325601] __do_softirq+0x1b7/0x7d4 [ 88.326080] [ 88.326292] Last potentially related work creation: [ 88.326873] kasan_save_stack+0x22/0x50 [ 88.327367] __kasan_record_aux_stack+0x8e/0xa0 [ 88.327936] __call_rcu_common.constprop.0+0x6a/0xb90 [ 88.328572] remove_vma+0x139/0x170 [ 88.329022] do_vmi_align_munmap+0xd4a/0x11f0 [ 88.329575] do_vmi_munmap+0x1f1/0x2b0 [ 88.330075] __vm_munmap+0x138/0x3a0 [ 88.330541] __x64_sys_munmap+0x59/0x80 [ 88.331030] do_syscall_64+0x3f/0x90 [ 88.331501] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 88.332141] [ 88.332353] The buggy address belongs to the object at ffff888016aedbc8 [ 88.332353] which belongs to the cache vm_area_struct of size 168 [ 88.333814] The buggy address is located 88 bytes inside of [ 88.333814] freed 168-byte region [ffff888016aedbc8, ffff888016aedc70) [ 88.335211] [ 88.335424] The buggy address belongs to the physical page: [ 88.336080] page:00000000c97f7a28 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16aed [ 88.337169] memcg:ffff88801879b201 [ 88.337593] flags: 0x100000000000200(slab|node=0|zone=1) [ 88.338234] page_type: 0xffffffff() [ 88.338686] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 88.339593] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801879b201 [ 88.340486] page dumped because: kasan: bad access detected [ 88.341152] [ 88.341364] Memory state around the buggy address: [ 88.341952] ffff888016aedb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 88.342814] ffff888016aedb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 88.343668] >ffff888016aedc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 88.344522] ^ [ 88.345053] ffff888016aedc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 88.345918] ffff888016aedd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 88.346764] ================================================================== [ 88.347812] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 90.288139] BUG: Bad rss-counter state mm:0000000025905edc type:MM_FILEPAGES val:33 [ 90.289140] BUG: Bad rss-counter state mm:0000000025905edc type:MM_ANONPAGES val:22 [ 90.766439] BUG: Bad rss-counter state mm:00000000d13f563f type:MM_FILEPAGES val:33 [ 90.767477] BUG: Bad rss-counter state mm:00000000d13f563f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60952' (ECDSA) to the list of known hosts. 2023/06/19 11:57:14 fuzzer started 2023/06/19 11:57:14 dialing manager at localhost:44161 2023/06/19 11:57:14 checking machine... 2023/06/19 11:57:14 checking revisions... [ 91.503539] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:57:14 testing simple program... [ 91.611186] cgroup: Unknown subsys name 'net' [ 91.688668] cgroup: Unknown subsys name 'rlimit' executing program [ 94.560442] kmemleak: 2 new suspected memory leaks (see /sys/kernel/debug/kmemleak) executing program executing program VM DIAGNOSIS: 11:57:11 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88800dc12f00 RCX=0000000000000000 RDX=ffffffff8186b9c5 RSI=ffff88800dc12f00 RDI=ffff888000000000 RBP=ffff88806ce09e38 RSP=ffff88806ce09e00 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff8880087b6780 R13=ffff8880087b6780 R14=ffffffff8186b9c5 R15=ffff88800da43380 RIP=ffffffff8180c7e5 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 00007f4dd0786900 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=00007f4dd0d3b650 CR3=000000000ddd4000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ffef252a998 CR3=0000000005482000 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=00007f38cc2975100000557a5d75e790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000