[ 56.926365] BUG: Bad rss-counter state mm:00000000f8b4d439 type:MM_FILEPAGES val:33 [ 56.927568] BUG: Bad rss-counter state mm:00000000f8b4d439 type:MM_ANONPAGES val:22 [ 56.968641] ================================================================== [ 56.969721] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 56.970672] Read of size 8 at addr ffff88800deb1d08 by task sshd/219 [ 56.971455] [ 56.971670] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 56.972547] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 56.973530] Call Trace: [ 56.973847] [ 56.974133] dump_stack_lvl+0x91/0xf0 [ 56.974627] print_report+0xcc/0x620 [ 56.975119] ? __virt_addr_valid+0x102/0x340 [ 56.975675] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.976302] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.976919] kasan_report+0xbe/0xf0 [ 56.977399] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.978011] vma_interval_tree_remove+0xc75/0xec0 [ 56.978621] vma_prepare+0xc54/0x11a0 [ 56.979109] __split_vma+0x5af/0x950 [ 56.979576] ? __pfx___split_vma+0x10/0x10 [ 56.980128] ? find_held_lock+0x2c/0x110 [ 56.980651] do_vmi_align_munmap+0x2ba/0x11f0 [ 56.981222] ? lock_is_held_type+0x9f/0x120 [ 56.981760] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 56.982369] ? mtree_range_walk+0x632/0x900 [ 56.982914] ? mas_walk+0x5c7/0x7c0 [ 56.983382] do_vmi_munmap+0x1f1/0x2b0 [ 56.983871] mmap_region+0x1f9/0x2660 [ 56.984362] ? vm_mmap_pgoff+0x15c/0x3a0 [ 56.984870] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 56.985577] ? __pfx_lock_acquire+0x10/0x10 [ 56.986111] ? __pfx_mmap_region+0x10/0x10 [ 56.986635] ? security_mmap_addr+0x7d/0xa0 [ 56.987162] ? get_unmapped_area+0x1f5/0x3f0 [ 56.987725] do_mmap+0x854/0xf00 [ 56.988175] vm_mmap_pgoff+0x1a6/0x3a0 [ 56.988674] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 56.989241] ksys_mmap_pgoff+0x3af/0x500 [ 56.989781] do_syscall_64+0x3f/0x90 [ 56.990267] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.990908] RIP: 0033:0x7f41d1603d82 [ 56.991364] 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 [ 56.993523] RSP: 002b:00007ffdd9171cf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 56.994451] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f41d1603d82 [ 56.995358] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f41d0a3d000 [ 56.996260] RBP: 00007f41d0a3d000 R08: 0000000000000009 R09: 0000000000001000 [ 56.997178] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fd0d027f70 [ 56.998094] R13: 00007ffdd9171d10 R14: 00007ffdd9171d40 R15: 00007ffdd91720a0 [ 56.999014] [ 56.999323] [ 56.999543] Allocated by task 212: [ 57.000012] kasan_save_stack+0x22/0x50 [ 57.000560] kasan_set_track+0x25/0x30 [ 57.001087] __kasan_slab_alloc+0x59/0x70 [ 57.001648] kmem_cache_alloc+0x16b/0x370 [ 57.002194] vm_area_dup+0x20/0x160 [ 57.002680] __split_vma+0x170/0x950 [ 57.003175] split_vma+0xc6/0x110 [ 57.003648] mprotect_fixup+0x8d2/0xb30 [ 57.004198] do_mprotect_pkey+0x87e/0xd40 [ 57.004759] __x64_sys_mprotect+0x78/0xc0 [ 57.005312] do_syscall_64+0x3f/0x90 [ 57.005822] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.006507] [ 57.006731] Freed by task 212: [ 57.007150] kasan_save_stack+0x22/0x50 [ 57.007683] kasan_set_track+0x25/0x30 [ 57.008214] kasan_save_free_info+0x2b/0x50 [ 57.008782] __kasan_slab_free+0x10a/0x190 [ 57.009353] kmem_cache_free+0x10d/0x4d0 [ 57.009895] rcu_core+0x8c8/0x2860 [ 57.010366] __do_softirq+0x1b7/0x7d4 [ 57.010878] [ 57.011106] Last potentially related work creation: [ 57.011730] kasan_save_stack+0x22/0x50 [ 57.012281] __kasan_record_aux_stack+0x8e/0xa0 [ 57.012894] __call_rcu_common.constprop.0+0x6a/0xb90 [ 57.013651] remove_vma+0x139/0x170 [ 57.014131] do_vmi_align_munmap+0xd4a/0x11f0 [ 57.014720] do_vmi_munmap+0x1f1/0x2b0 [ 57.015237] __vm_munmap+0x138/0x3a0 [ 57.015730] __x64_sys_munmap+0x59/0x80 [ 57.016266] do_syscall_64+0x3f/0x90 [ 57.016766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.017453] [ 57.017676] Second to last potentially related work creation: [ 57.018413] kasan_save_stack+0x22/0x50 [ 57.018943] __kasan_record_aux_stack+0x8e/0xa0 [ 57.019561] __call_rcu_common.constprop.0+0x6a/0xb90 [ 57.020263] remove_vma+0x139/0x170 [ 57.020747] do_vmi_align_munmap+0xd4a/0x11f0 [ 57.021343] do_vmi_munmap+0x1f1/0x2b0 [ 57.021862] mmap_region+0x1f9/0x2660 [ 57.022364] do_mmap+0x854/0xf00 [ 57.022820] vm_mmap_pgoff+0x1a6/0x3a0 [ 57.023343] ksys_mmap_pgoff+0x3af/0x500 [ 57.023873] do_syscall_64+0x3f/0x90 [ 57.024393] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.025066] [ 57.025291] The buggy address belongs to the object at ffff88800deb1cb0 [ 57.025291] which belongs to the cache vm_area_struct of size 168 [ 57.026873] The buggy address is located 88 bytes inside of [ 57.026873] freed 168-byte region [ffff88800deb1cb0, ffff88800deb1d58) [ 57.028394] [ 57.028625] The buggy address belongs to the physical page: [ 57.029336] page:0000000075e46c50 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdeb1 [ 57.030498] memcg:ffff88800d8c9301 [ 57.030956] flags: 0x100000000000200(slab|node=0|zone=1) [ 57.031655] page_type: 0xffffffff() [ 57.032149] raw: 0100000000000200 ffff88800879fc80 ffffea00003ace80 dead000000000008 [ 57.033140] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d8c9301 [ 57.034116] page dumped because: kasan: bad access detected [ 57.034822] [ 57.035045] Memory state around the buggy address: [ 57.035668] ffff88800deb1c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 57.036599] ffff88800deb1c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 57.037522] >ffff88800deb1d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 57.038435] ^ [ 57.038902] ffff88800deb1d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 57.039835] ffff88800deb1e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 57.040771] ================================================================== [ 57.041756] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 59.014069] BUG: Bad rss-counter state mm:000000006fee6061 type:MM_FILEPAGES val:33 [ 59.015061] BUG: Bad rss-counter state mm:000000006fee6061 type:MM_ANONPAGES val:22 [ 59.540371] BUG: Bad rss-counter state mm:00000000c7237b9a type:MM_FILEPAGES val:33 [ 59.541520] BUG: Bad rss-counter state mm:00000000c7237b9a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10016' (ECDSA) to the list of known hosts. 2023/06/19 20:32:21 fuzzer started 2023/06/19 20:32:22 dialing manager at localhost:44161 2023/06/19 20:32:22 checking machine... 2023/06/19 20:32:22 checking revisions... [ 60.175235] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:32:22 testing simple program... [ 60.229814] cgroup: Unknown subsys name 'net' [ 60.317449] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:32:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880088af4d0 RCX=0000000000000000 RDX=ffff888016613680 RSI=ffffffff818d5305 RDI=ffff8880088af4d8 RBP=0000000000000000 RSP=ffff88800e57f928 R8 =0000000000000007 R9 =0000000000000000 R10=ffff888015d0ec00 R11=0000000000000001 R12=ffff88806cdf7528 R13=ffff8880088abd60 R14=dffffc0000000000 R15=ffff88800e57fc58 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 00007f3f5b9b4900 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=00007f3f5bf6c0b0 CR3=000000001ca74000 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=00007ffe6a570d58 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=00007f1f2799a510000056309b8fe790 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