[ 30.642895] BUG: Bad rss-counter state mm:00000000254e406a type:MM_FILEPAGES val:33 [ 30.644082] BUG: Bad rss-counter state mm:00000000254e406a type:MM_ANONPAGES val:22 [ 30.685574] ================================================================== [ 30.686869] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.688222] Read of size 8 at addr ffff88800f626c20 by task sshd/220 [ 30.689176] [ 30.689399] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.690245] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.691327] Call Trace: [ 30.691667] [ 30.691970] dump_stack_lvl+0x91/0xf0 [ 30.692552] print_report+0xcc/0x620 [ 30.693032] ? __virt_addr_valid+0x102/0x340 [ 30.693601] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.694210] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.694837] kasan_report+0xbe/0xf0 [ 30.695327] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.695981] vma_interval_tree_remove+0xc75/0xec0 [ 30.696791] vma_prepare+0xc54/0x11a0 [ 30.697276] __split_vma+0x5af/0x950 [ 30.697754] ? __pfx___split_vma+0x10/0x10 [ 30.698286] ? find_held_lock+0x2c/0x110 [ 30.698810] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.699400] ? lock_is_held_type+0x9f/0x120 [ 30.699949] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.700579] ? mtree_range_walk+0x632/0x900 [ 30.701126] ? mas_walk+0x5c7/0x7c0 [ 30.701615] do_vmi_munmap+0x1f1/0x2b0 [ 30.702097] mmap_region+0x1f9/0x2660 [ 30.702582] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.703079] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.703822] ? __pfx_lock_acquire+0x10/0x10 [ 30.704371] ? __pfx_mmap_region+0x10/0x10 [ 30.704897] ? security_mmap_addr+0x7d/0xa0 [ 30.705433] ? get_unmapped_area+0x1f5/0x3f0 [ 30.705981] do_mmap+0x854/0xf00 [ 30.706428] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.706918] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.707498] ksys_mmap_pgoff+0x3af/0x500 [ 30.708009] do_syscall_64+0x3f/0x90 [ 30.708532] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.709162] RIP: 0033:0x7fb24a3b1d82 [ 30.709632] 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 [ 30.711789] RSP: 002b:00007fffdd6a87b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.712787] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb24a3b1d82 [ 30.713643] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb2497eb000 [ 30.714487] RBP: 00007fb2497eb000 R08: 0000000000000009 R09: 0000000000001000 [ 30.715352] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560f2a206ec0 [ 30.716187] R13: 00007fffdd6a87d0 R14: 00007fffdd6a8800 R15: 00007fffdd6a8b60 [ 30.717069] [ 30.717376] [ 30.717596] Allocated by task 212: [ 30.718025] kasan_save_stack+0x22/0x50 [ 30.718544] kasan_set_track+0x25/0x30 [ 30.719026] __kasan_slab_alloc+0x59/0x70 [ 30.719582] kmem_cache_alloc+0x16b/0x370 [ 30.720094] vm_area_dup+0x20/0x160 [ 30.720584] __split_vma+0x170/0x950 [ 30.721036] split_vma+0xc6/0x110 [ 30.721486] mprotect_fixup+0x8d2/0xb30 [ 30.721983] do_mprotect_pkey+0x87e/0xd40 [ 30.722519] __x64_sys_mprotect+0x78/0xc0 [ 30.723024] do_syscall_64+0x3f/0x90 [ 30.723531] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.724162] [ 30.724413] Freed by task 212: [ 30.724805] kasan_save_stack+0x22/0x50 [ 30.725328] kasan_set_track+0x25/0x30 [ 30.725827] kasan_save_free_info+0x2b/0x50 [ 30.726365] __kasan_slab_free+0x10a/0x190 [ 30.726906] kmem_cache_free+0x10d/0x4d0 [ 30.727439] rcu_core+0x8c8/0x2860 [ 30.727888] __do_softirq+0x1b7/0x7d4 [ 30.728391] [ 30.728620] Last potentially related work creation: [ 30.729195] kasan_save_stack+0x22/0x50 [ 30.729744] __kasan_record_aux_stack+0x8e/0xa0 [ 30.730320] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.730962] remove_vma+0x139/0x170 [ 30.731440] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.732001] do_vmi_munmap+0x1f1/0x2b0 [ 30.732524] __vm_munmap+0x138/0x3a0 [ 30.732994] __x64_sys_munmap+0x59/0x80 [ 30.733502] do_syscall_64+0x3f/0x90 [ 30.733976] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.734636] [ 30.734850] The buggy address belongs to the object at ffff88800f626bc8 [ 30.734850] which belongs to the cache vm_area_struct of size 168 [ 30.736324] The buggy address is located 88 bytes inside of [ 30.736324] freed 168-byte region [ffff88800f626bc8, ffff88800f626c70) [ 30.737749] [ 30.737968] The buggy address belongs to the physical page: [ 30.738634] page:0000000045d58cc6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf626 [ 30.739720] memcg:ffff88800fcab701 [ 30.740141] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.740878] page_type: 0xffffffff() [ 30.741339] raw: 0100000000000200 ffff8880087a0c80 ffffea00005fd3c0 000000000000000b [ 30.742236] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fcab701 [ 30.743142] page dumped because: kasan: bad access detected [ 30.743813] [ 30.744028] Memory state around the buggy address: [ 30.744657] ffff88800f626b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.745517] ffff88800f626b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.746372] >ffff88800f626c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.747215] ^ [ 30.747753] ffff88800f626c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.748628] ffff88800f626d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.749479] ================================================================== [ 30.750447] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.810666] BUG: Bad rss-counter state mm:00000000fe1fbb00 type:MM_FILEPAGES val:33 [ 32.811839] BUG: Bad rss-counter state mm:00000000fe1fbb00 type:MM_ANONPAGES val:22 [ 33.190557] BUG: Bad rss-counter state mm:000000002d2a9290 type:MM_FILEPAGES val:33 [ 33.191538] BUG: Bad rss-counter state mm:000000002d2a9290 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38635' (ECDSA) to the list of known hosts. 2023/06/20 15:00:52 fuzzer started 2023/06/20 15:00:52 dialing manager at localhost:36067 2023/06/20 15:00:52 checking machine... 2023/06/20 15:00:52 checking revisions... [ 33.900553] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:00:53 testing simple program... [ 33.939202] cgroup: Unknown subsys name 'net' [ 33.976841] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:00:52 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f1ebc664dad RCX=ffffffff813a0add RDX=ffff8880102e1b40 RSI=0000000000000000 RDI=0000000000000006 RBP=ffffffffffffffff RSP=ffff88800f63f448 R8 =0000000000000006 R9 =00007f1ebc664dad R10=ffffffffffffffff R11=00000000000b6a61 R12=ffff88800f63f588 R13=0000000000000000 R14=ffff8880102e1b40 R15=1ffff11001ec7f1d RIP=ffffffff814c027c 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 00007f1ebc022700 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=00007f98c77a70b0 CR3=0000000016718000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732032353a3030 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363339 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f5bc65c5b10 CR3=0000000016718000 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=2032353a30303a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a30303a3531203032 XMM08=00000000000000000000003f00000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000