[ 23.801086] BUG: Bad rss-counter state mm:00000000798fd514 type:MM_FILEPAGES val:33 [ 23.802550] BUG: Bad rss-counter state mm:00000000798fd514 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 23.953693] ================================================================== [ 23.954607] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.955573] Read of size 8 at addr ffff888019899a50 by task sshd/220 [ 23.956354] [ 23.956582] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.957605] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.958597] Call Trace: [ 23.958914] [ 23.959217] dump_stack_lvl+0x91/0xf0 [ 23.959733] print_report+0xcc/0x620 [ 23.960236] ? __virt_addr_valid+0x102/0x340 [ 23.960785] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.961407] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.962030] kasan_report+0xbe/0xf0 [ 23.962519] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.963147] vma_interval_tree_remove+0xc75/0xec0 [ 23.963765] vma_prepare+0xc54/0x11a0 [ 23.964240] __split_vma+0x5af/0x950 [ 23.964721] ? __pfx___split_vma+0x10/0x10 [ 23.965252] ? find_held_lock+0x2c/0x110 [ 23.965776] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.966345] ? lock_is_held_type+0x9f/0x120 [ 23.966894] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.967525] ? mtree_range_walk+0x632/0x900 [ 23.968076] ? mas_walk+0x5c7/0x7c0 [ 23.968563] do_vmi_munmap+0x1f1/0x2b0 [ 23.969060] mmap_region+0x1f9/0x2660 [ 23.969554] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.970062] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.970777] ? __pfx_lock_acquire+0x10/0x10 [ 23.971314] ? __pfx_mmap_region+0x10/0x10 [ 23.971846] ? security_mmap_addr+0x7d/0xa0 [ 23.972375] ? get_unmapped_area+0x1f5/0x3f0 [ 23.972928] do_mmap+0x854/0xf00 [ 23.973365] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.973857] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.974415] ksys_mmap_pgoff+0x3af/0x500 [ 23.974917] do_syscall_64+0x3f/0x90 [ 23.975400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.976047] RIP: 0033:0x7f0d7c851d82 [ 23.976502] 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 [ 23.978624] RSP: 002b:00007ffd22259b38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.979548] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0d7c851d82 [ 23.980398] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0d7bc8b000 [ 23.981248] RBP: 00007f0d7bc8b000 R08: 0000000000000009 R09: 0000000000001000 [ 23.982095] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c9c211dec0 [ 23.982942] R13: 00007ffd22259b50 R14: 00007ffd22259b80 R15: 00007ffd22259ee0 [ 23.983800] [ 23.984096] [ 23.984311] Allocated by task 213: [ 23.984740] kasan_save_stack+0x22/0x50 [ 23.985242] kasan_set_track+0x25/0x30 [ 23.985738] __kasan_slab_alloc+0x59/0x70 [ 23.986266] kmem_cache_alloc+0x16b/0x370 [ 23.986775] vm_area_dup+0x20/0x160 [ 23.987248] __split_vma+0x170/0x950 [ 23.987722] split_vma+0xc6/0x110 [ 23.988157] mprotect_fixup+0x8d2/0xb30 [ 23.988658] do_mprotect_pkey+0x87e/0xd40 [ 23.989183] __x64_sys_mprotect+0x78/0xc0 [ 23.989706] do_syscall_64+0x3f/0x90 [ 23.990182] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.990824] [ 23.991038] Freed by task 19: [ 23.991429] kasan_save_stack+0x22/0x50 [ 23.991937] kasan_set_track+0x25/0x30 [ 23.992428] kasan_save_free_info+0x2b/0x50 [ 23.992967] __kasan_slab_free+0x10a/0x190 [ 23.993508] kmem_cache_free+0x10d/0x4d0 [ 23.994012] rcu_core+0x8c8/0x2860 [ 23.994459] __do_softirq+0x1b7/0x7d4 [ 23.994936] [ 23.995151] Last potentially related work creation: [ 23.995756] kasan_save_stack+0x22/0x50 [ 23.996257] __kasan_record_aux_stack+0x8e/0xa0 [ 23.996835] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.997478] remove_vma+0x139/0x170 [ 23.997927] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.998485] do_vmi_munmap+0x1f1/0x2b0 [ 23.998974] __vm_munmap+0x138/0x3a0 [ 23.999451] __x64_sys_munmap+0x59/0x80 [ 23.999953] do_syscall_64+0x3f/0x90 [ 24.000427] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.001075] [ 24.001289] Second to last potentially related work creation: [ 24.001974] kasan_save_stack+0x22/0x50 [ 24.002485] __kasan_record_aux_stack+0x8e/0xa0 [ 24.003060] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.003702] remove_vma+0x139/0x170 [ 24.004152] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.004713] do_vmi_munmap+0x1f1/0x2b0 [ 24.005209] mmap_region+0x1f9/0x2660 [ 24.005697] do_mmap+0x854/0xf00 [ 24.006126] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.006621] ksys_mmap_pgoff+0x7d/0x500 [ 24.007120] do_syscall_64+0x3f/0x90 [ 24.007614] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.008257] [ 24.008469] The buggy address belongs to the object at ffff8880198999f8 [ 24.008469] which belongs to the cache vm_area_struct of size 168 [ 24.009951] The buggy address is located 88 bytes inside of [ 24.009951] freed 168-byte region [ffff8880198999f8, ffff888019899aa0) [ 24.011376] [ 24.011599] The buggy address belongs to the physical page: [ 24.012274] page:00000000586de51f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19899 [ 24.013375] memcg:ffff88800efffb01 [ 24.013799] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.014512] page_type: 0xffffffff() [ 24.014965] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 0000000000000001 [ 24.015902] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800efffb01 [ 24.016812] page dumped because: kasan: bad access detected [ 24.017474] [ 24.017688] Memory state around the buggy address: [ 24.018269] ffff888019899900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.019125] ffff888019899980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 24.019998] >ffff888019899a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.020846] ^ [ 24.021539] ffff888019899a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 24.022403] ffff888019899b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.023267] ================================================================== [ 24.024239] Disabling lock debugging due to kernel taint [ 25.997424] BUG: Bad rss-counter state mm:000000000cb6e9a3 type:MM_FILEPAGES val:33 [ 25.998698] BUG: Bad rss-counter state mm:000000000cb6e9a3 type:MM_ANONPAGES val:22 [ 26.407269] BUG: Bad rss-counter state mm:00000000dd16e9ae type:MM_FILEPAGES val:33 [ 26.408316] BUG: Bad rss-counter state mm:00000000dd16e9ae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31672' (ECDSA) to the list of known hosts. 2023/06/20 16:34:20 fuzzer started 2023/06/20 16:34:20 dialing manager at localhost:36067 2023/06/20 16:34:20 checking machine... 2023/06/20 16:34:20 checking revisions... [ 27.138497] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:34:20 testing simple program... [ 27.189461] cgroup: Unknown subsys name 'net' [ 27.230902] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:34:20 Registers: info registers vcpu 0 RAX=00000000dead4ead RBX=ffffffff856d84a0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff856d84a4 RBP=1ffff110011b3f83 RSP=ffff888008d9fc10 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=0000000000000287 R13=ffffea000036bd80 R14=ffffffff8186b835 R15=ffff88800987e580 RIP=ffffffff812e009a RFL=00000046 [---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 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=00007ffedc0298c8 CR3=0000000005482000 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=00007f6ce889d51000005569c559e790 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 info registers vcpu 1 RAX=0000000080010001 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888019ac51c0 RSI=ffffffff814105c1 RDI=0000000000000001 RBP=0000000000000001 RSP=ffff88806cf09f98 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=ffff88806cf09ff8 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=ffff8880159d36b8 RIP=ffffffff814105c1 RFL=00000046 [---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 00007f53dc9a4900 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=00007f53dcf5c0b0 CR3=000000000f042000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000