[ 24.539664] BUG: Bad rss-counter state mm:0000000037230523 type:MM_FILEPAGES val:33 [ 24.540223] BUG: Bad rss-counter state mm:0000000037230523 type:MM_ANONPAGES val:22 [ 24.684262] ================================================================== [ 24.685182] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.686109] Read of size 8 at addr ffff88800cafd798 by task sshd/220 [ 24.686884] [ 24.687101] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.688057] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.689060] Call Trace: [ 24.689379] [ 24.689808] dump_stack_lvl+0x91/0xf0 [ 24.690385] print_report+0xcc/0x620 [ 24.690970] ? __virt_addr_valid+0x102/0x340 [ 24.691620] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.692354] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.693083] kasan_report+0xbe/0xf0 [ 24.693647] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.694380] vma_interval_tree_remove+0xc75/0xec0 [ 24.695099] vma_prepare+0xc54/0x11a0 [ 24.695664] __split_vma+0x5af/0x950 [ 24.696217] ? __pfx___split_vma+0x10/0x10 [ 24.696845] ? find_held_lock+0x2c/0x110 [ 24.697474] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.698164] ? lock_is_held_type+0x9f/0x120 [ 24.698847] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.699580] ? mtree_range_walk+0x632/0x900 [ 24.700147] ? mas_walk+0x5c7/0x7c0 [ 24.700621] do_vmi_munmap+0x1f1/0x2b0 [ 24.701112] mmap_region+0x1f9/0x2660 [ 24.701589] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.702107] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.702827] ? __pfx_lock_acquire+0x10/0x10 [ 24.703357] ? __pfx_mmap_region+0x10/0x10 [ 24.703881] ? security_mmap_addr+0x7d/0xa0 [ 24.704406] ? get_unmapped_area+0x1f5/0x3f0 [ 24.704954] do_mmap+0x854/0xf00 [ 24.705389] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.705880] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.706440] ksys_mmap_pgoff+0x3af/0x500 [ 24.706952] do_syscall_64+0x3f/0x90 [ 24.707427] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.708069] RIP: 0033:0x7f6a51923d82 [ 24.708528] 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 [ 24.710655] RSP: 002b:00007ffe1787c978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.711572] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6a51923d82 [ 24.712418] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6a50d5d000 [ 24.713256] RBP: 00007f6a50d5d000 R08: 0000000000000009 R09: 0000000000001000 [ 24.714103] R10: 0000000000000812 R11: 0000000000000206 R12: 000055671f156ec0 [ 24.714970] R13: 00007ffe1787c990 R14: 00007ffe1787c9c0 R15: 00007ffe1787cd20 [ 24.715833] [ 24.716127] [ 24.716344] Allocated by task 213: [ 24.716772] kasan_save_stack+0x22/0x50 [ 24.717270] kasan_set_track+0x25/0x30 [ 24.717769] __kasan_slab_alloc+0x59/0x70 [ 24.718291] kmem_cache_alloc+0x16b/0x370 [ 24.718815] vm_area_dup+0x20/0x160 [ 24.719276] __split_vma+0x170/0x950 [ 24.719743] split_vma+0xc6/0x110 [ 24.720181] mprotect_fixup+0x8d2/0xb30 [ 24.720680] do_mprotect_pkey+0x87e/0xd40 [ 24.721195] __x64_sys_mprotect+0x78/0xc0 [ 24.721718] do_syscall_64+0x3f/0x90 [ 24.722190] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.722854] [ 24.723068] Freed by task 213: [ 24.723465] kasan_save_stack+0x22/0x50 [ 24.723968] kasan_set_track+0x25/0x30 [ 24.724466] kasan_save_free_info+0x2b/0x50 [ 24.724992] __kasan_slab_free+0x10a/0x190 [ 24.725524] kmem_cache_free+0x10d/0x4d0 [ 24.726029] rcu_core+0x8c8/0x2860 [ 24.726476] __do_softirq+0x1b7/0x7d4 [ 24.726968] [ 24.727183] Last potentially related work creation: [ 24.727773] kasan_save_stack+0x22/0x50 [ 24.728274] __kasan_record_aux_stack+0x8e/0xa0 [ 24.728841] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.729487] remove_vma+0x139/0x170 [ 24.729933] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.730491] do_vmi_munmap+0x1f1/0x2b0 [ 24.730991] __vm_munmap+0x138/0x3a0 [ 24.731456] __x64_sys_munmap+0x59/0x80 [ 24.731952] do_syscall_64+0x3f/0x90 [ 24.732431] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.733080] [ 24.733295] The buggy address belongs to the object at ffff88800cafd740 [ 24.733295] which belongs to the cache vm_area_struct of size 168 [ 24.734763] The buggy address is located 88 bytes inside of [ 24.734763] freed 168-byte region [ffff88800cafd740, ffff88800cafd7e8) [ 24.736159] [ 24.736372] The buggy address belongs to the physical page: [ 24.737028] page:00000000be752ae7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcafd [ 24.738099] memcg:ffff88800edc2e01 [ 24.738526] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.739187] page_type: 0xffffffff() [ 24.739639] raw: 0100000000000200 ffff88800879fc80 ffffea000032be00 0000000000000002 [ 24.740546] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edc2e01 [ 24.741444] page dumped because: kasan: bad access detected [ 24.742101] [ 24.742319] Memory state around the buggy address: [ 24.742908] ffff88800cafd680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.743757] ffff88800cafd700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 24.744599] >ffff88800cafd780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.745438] ^ [ 24.745927] ffff88800cafd800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 24.746798] ffff88800cafd880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 24.747641] ================================================================== [ 24.748697] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.641567] BUG: Bad rss-counter state mm:0000000072ac206d type:MM_FILEPAGES val:33 [ 26.642579] BUG: Bad rss-counter state mm:0000000072ac206d type:MM_ANONPAGES val:22 [ 27.138813] BUG: Bad rss-counter state mm:00000000586b392a type:MM_FILEPAGES val:33 [ 27.139825] BUG: Bad rss-counter state mm:00000000586b392a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41581' (ECDSA) to the list of known hosts. 2023/06/19 20:33:53 fuzzer started 2023/06/19 20:33:53 dialing manager at localhost:44161 2023/06/19 20:33:53 checking machine... 2023/06/19 20:33:53 checking revisions... [ 27.899704] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:33:53 testing simple program... [ 27.956475] cgroup: Unknown subsys name 'net' [ 28.037617] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:33:52 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000001 RCX=ffffffff83639305 RDX=0000000000026393 RSI=0000000000026393 RDI=ffffffff86580a0c RBP=ffff8880101ef2e0 RSP=ffff8880101ef218 R8 =0000000000000000 R9 =ffff8880101ef2c8 R10=0000000000038001 R11=000000000009a9a2 R12=ffff8880101ef2e8 R13=ffff8880101ef2d0 R14=ffff8880101ef2c9 R15=ffff8880101ef288 RIP=ffffffff8113078b 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 00007fb049a7a900 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=00007ff14e2d3650 CR3=000000000c63a000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=3c4fd9d2b8aaa37100000000000ae988 XMM05=723c670708859c900000000000133b78 XMM06=4fda316b135da52b0000000000131e90 XMM07=fb795ef6d65770560000000000122780 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81132ffd RDX=000000000000132f RSI=000000000000132f RDI=ffffffff864ec87c RBP=ffff888015b87840 RSP=ffff888015b87728 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000038001 R11=00000000000b6996 R12=ffff888015b87848 R13=ffff888015b87830 R14=ffff888015b87829 R15=ffff888015b877e8 RIP=ffffffff8113077a RFL=00000217 [----APC] 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 00007ff14dd1e900 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=00007ff14e2d60b0 CR3=000000000ca6e000 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