[ 23.788598] BUG: Bad rss-counter state mm:000000001ea30592 type:MM_FILEPAGES val:33 [ 23.789953] BUG: Bad rss-counter state mm:000000001ea30592 type:MM_ANONPAGES val:22 [ 23.944271] ================================================================== [ 23.945196] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.946146] Read of size 8 at addr ffff88800c569140 by task sshd/220 [ 23.947049] [ 23.947265] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.948134] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.949118] Call Trace: [ 23.949441] [ 23.949724] dump_stack_lvl+0x91/0xf0 [ 23.950217] print_report+0xcc/0x620 [ 23.950699] ? __virt_addr_valid+0x102/0x340 [ 23.951253] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.951871] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.952499] kasan_report+0xbe/0xf0 [ 23.952971] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.953587] vma_interval_tree_remove+0xc75/0xec0 [ 23.954177] vma_prepare+0xc54/0x11a0 [ 23.954652] __split_vma+0x5af/0x950 [ 23.955120] ? __pfx___split_vma+0x10/0x10 [ 23.955642] ? find_held_lock+0x2c/0x110 [ 23.956164] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.956737] ? lock_is_held_type+0x9f/0x120 [ 23.957274] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.957873] ? mtree_range_walk+0x632/0x900 [ 23.958422] ? mas_walk+0x5c7/0x7c0 [ 23.958900] do_vmi_munmap+0x1f1/0x2b0 [ 23.959384] mmap_region+0x1f9/0x2660 [ 23.959870] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.960384] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.961112] ? __pfx_lock_acquire+0x10/0x10 [ 23.961650] ? __pfx_mmap_region+0x10/0x10 [ 23.962176] ? security_mmap_addr+0x7d/0xa0 [ 23.962714] ? get_unmapped_area+0x1f5/0x3f0 [ 23.963261] do_mmap+0x854/0xf00 [ 23.963698] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.964187] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.964766] ksys_mmap_pgoff+0x3af/0x500 [ 23.965275] do_syscall_64+0x3f/0x90 [ 23.965765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.966407] RIP: 0033:0x7f8980ebcd82 [ 23.966856] 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 [ 23.968962] RSP: 002b:00007ffc921f6a38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.969868] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8980ebcd82 [ 23.970715] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f89802f6000 [ 23.971564] RBP: 00007f89802f6000 R08: 0000000000000009 R09: 0000000000001000 [ 23.972420] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560b73b6fd90 [ 23.973264] R13: 00007ffc921f6a50 R14: 00007ffc921f6a80 R15: 00007ffc921f6de0 [ 23.974118] [ 23.974409] [ 23.974624] Allocated by task 213: [ 23.975048] kasan_save_stack+0x22/0x50 [ 23.975550] kasan_set_track+0x25/0x30 [ 23.976036] __kasan_slab_alloc+0x59/0x70 [ 23.976572] kmem_cache_alloc+0x16b/0x370 [ 23.977079] vm_area_dup+0x20/0x160 [ 23.977529] __split_vma+0x170/0x950 [ 23.977991] split_vma+0xc6/0x110 [ 23.978427] mprotect_fixup+0x8d2/0xb30 [ 23.978923] do_mprotect_pkey+0x87e/0xd40 [ 23.979444] __x64_sys_mprotect+0x78/0xc0 [ 23.979961] do_syscall_64+0x3f/0x90 [ 23.980451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.981087] [ 23.981300] Freed by task 204: [ 23.981690] kasan_save_stack+0x22/0x50 [ 23.982186] kasan_set_track+0x25/0x30 [ 23.982675] kasan_save_free_info+0x2b/0x50 [ 23.983210] __kasan_slab_free+0x10a/0x190 [ 23.983740] kmem_cache_free+0x10d/0x4d0 [ 23.984250] rcu_core+0x8c8/0x2860 [ 23.984703] __do_softirq+0x1b7/0x7d4 [ 23.985180] [ 23.985393] Last potentially related work creation: [ 23.985974] kasan_save_stack+0x22/0x50 [ 23.986479] __kasan_record_aux_stack+0x8e/0xa0 [ 23.987048] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.987736] remove_vma+0x139/0x170 [ 23.988198] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.988766] do_vmi_munmap+0x1f1/0x2b0 [ 23.989245] __vm_munmap+0x138/0x3a0 [ 23.989708] __x64_sys_munmap+0x59/0x80 [ 23.990198] do_syscall_64+0x3f/0x90 [ 23.990669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.991308] [ 23.991522] Second to last potentially related work creation: [ 23.992212] kasan_save_stack+0x22/0x50 [ 23.992722] __kasan_record_aux_stack+0x8e/0xa0 [ 23.993296] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.993933] remove_vma+0x139/0x170 [ 23.994385] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.994937] do_vmi_munmap+0x1f1/0x2b0 [ 23.995419] mmap_region+0x1f9/0x2660 [ 23.995894] do_mmap+0x854/0xf00 [ 23.996322] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.996821] ksys_mmap_pgoff+0x3af/0x500 [ 23.997320] do_syscall_64+0x3f/0x90 [ 23.997792] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.998429] [ 23.998643] The buggy address belongs to the object at ffff88800c5690e8 [ 23.998643] which belongs to the cache vm_area_struct of size 168 [ 24.000119] The buggy address is located 88 bytes inside of [ 24.000119] freed 168-byte region [ffff88800c5690e8, ffff88800c569190) [ 24.001521] [ 24.001738] The buggy address belongs to the physical page: [ 24.002401] page:00000000a0aa4daf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc569 [ 24.003475] memcg:ffff88800c5dc201 [ 24.003908] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.004557] page_type: 0xffffffff() [ 24.005007] raw: 0100000000000200 ffff8880087a0c80 ffffea00004fdec0 dead000000000008 [ 24.005928] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5dc201 [ 24.006819] page dumped because: kasan: bad access detected [ 24.007476] [ 24.007689] Memory state around the buggy address: [ 24.008265] ffff88800c569000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.009123] ffff88800c569080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 24.009984] >ffff88800c569100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.010828] ^ [ 24.011457] ffff88800c569180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 24.012309] ffff88800c569200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 24.013175] ================================================================== [ 24.014070] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.858276] BUG: Bad rss-counter state mm:00000000b0b9abfe type:MM_FILEPAGES val:33 [ 25.859478] BUG: Bad rss-counter state mm:00000000b0b9abfe type:MM_ANONPAGES val:22 [ 26.240302] BUG: Bad rss-counter state mm:0000000007f367fa type:MM_FILEPAGES val:33 [ 26.241294] BUG: Bad rss-counter state mm:0000000007f367fa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51501' (ECDSA) to the list of known hosts. 2023/06/21 01:24:22 fuzzer started 2023/06/21 01:24:22 dialing manager at localhost:36067 2023/06/21 01:24:22 checking machine... 2023/06/21 01:24:22 checking revisions... [ 26.967053] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:24:22 testing simple program... [ 27.015728] cgroup: Unknown subsys name 'net' [ 27.074314] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:24:22 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a50 RCX=ffffffff864bce01 RDX=1ffff1100d9c1355 RSI=0000000000000000 RDI=ffffffff822704a0 RBP=ffff88806ce09aa8 RSP=ffff88806ce09a38 R8 =ffffffff864bce30 R9 =ffff88806ce09a90 R10=0000000000038001 R11=00000000000b6d7d R12=ffff88806ce09b18 R13=0000000000000000 R14=ffff888015fab680 R15=ffff88800eb42980 RIP=ffffffff811303b2 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 00007ff6cbfff700 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=00007ff5cece6650 CR3=0000000019e48000 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=2031323a34323a3130203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a34323a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000001000 RCX=ffffffff8185c9c7 RDX=ffff88800dbed1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888016617d40 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff88800dcb8c80 R14=ffff888016617ec8 R15=0000000000000001 RIP=ffffffff814c0261 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 00007ff5ce731900 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=00007ff5cece90b0 CR3=0000000009d66000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000