[ 32.344135] BUG: Bad rss-counter state mm:00000000ebfc4126 type:MM_FILEPAGES val:33 [ 32.345775] BUG: Bad rss-counter state mm:00000000ebfc4126 type:MM_ANONPAGES val:22 [ 32.515089] ================================================================== [ 32.516020] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.516944] Read of size 8 at addr ffff888018171c20 by task sshd/226 [ 32.517709] [ 32.517927] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.518909] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.519900] Call Trace: [ 32.520243] [ 32.520523] dump_stack_lvl+0x91/0xf0 [ 32.521022] print_report+0xcc/0x620 [ 32.521516] ? __virt_addr_valid+0x102/0x340 [ 32.522057] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.522689] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.523295] kasan_report+0xbe/0xf0 [ 32.523808] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.524445] vma_interval_tree_remove+0xc75/0xec0 [ 32.525041] vma_prepare+0xc54/0x11a0 [ 32.525524] __split_vma+0x5af/0x950 [ 32.525992] ? __pfx___split_vma+0x10/0x10 [ 32.526530] ? find_held_lock+0x2c/0x110 [ 32.527048] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.527612] ? lock_is_held_type+0x9f/0x120 [ 32.528184] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.528786] ? mtree_range_walk+0x632/0x900 [ 32.529331] ? mas_walk+0x5c7/0x7c0 [ 32.529820] do_vmi_munmap+0x1f1/0x2b0 [ 32.530315] mmap_region+0x1f9/0x2660 [ 32.530828] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.531338] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.532081] ? __pfx_lock_acquire+0x10/0x10 [ 32.532619] ? __pfx_mmap_region+0x10/0x10 [ 32.533143] ? security_mmap_addr+0x7d/0xa0 [ 32.533673] ? get_unmapped_area+0x1f5/0x3f0 [ 32.534224] do_mmap+0x854/0xf00 [ 32.534682] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.535176] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.535746] ksys_mmap_pgoff+0x3af/0x500 [ 32.536283] do_syscall_64+0x3f/0x90 [ 32.536760] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.537400] RIP: 0033:0x7f4e03db2d82 [ 32.537857] 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 [ 32.540022] RSP: 002b:00007ffcea53aa38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.540928] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4e03db2d82 [ 32.541765] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4e031ec000 [ 32.542632] RBP: 00007f4e031ec000 R08: 0000000000000009 R09: 0000000000001000 [ 32.543488] R10: 0000000000000812 R11: 0000000000000206 R12: 000055856c22dd90 [ 32.544368] R13: 00007ffcea53aa50 R14: 00007ffcea53aa80 R15: 00007ffcea53ade0 [ 32.545231] [ 32.545526] [ 32.545741] Allocated by task 213: [ 32.546163] kasan_save_stack+0x22/0x50 [ 32.546684] kasan_set_track+0x25/0x30 [ 32.547173] __kasan_slab_alloc+0x59/0x70 [ 32.547694] kmem_cache_alloc+0x16b/0x370 [ 32.548248] vm_area_dup+0x20/0x160 [ 32.548703] __split_vma+0x170/0x950 [ 32.549167] split_vma+0xc6/0x110 [ 32.549617] mprotect_fixup+0x8d2/0xb30 [ 32.550112] do_mprotect_pkey+0x87e/0xd40 [ 32.550659] __x64_sys_mprotect+0x78/0xc0 [ 32.551179] do_syscall_64+0x3f/0x90 [ 32.551652] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.552337] [ 32.552559] Freed by task 213: [ 32.552949] kasan_save_stack+0x22/0x50 [ 32.553462] kasan_set_track+0x25/0x30 [ 32.553960] kasan_save_free_info+0x2b/0x50 [ 32.554505] __kasan_slab_free+0x10a/0x190 [ 32.555037] kmem_cache_free+0x10d/0x4d0 [ 32.555545] rcu_core+0x8c8/0x2860 [ 32.556031] __do_softirq+0x1b7/0x7d4 [ 32.556506] [ 32.556724] Last potentially related work creation: [ 32.557323] kasan_save_stack+0x22/0x50 [ 32.557826] __kasan_record_aux_stack+0x8e/0xa0 [ 32.558401] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.559061] remove_vma+0x139/0x170 [ 32.559514] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.560113] do_vmi_munmap+0x1f1/0x2b0 [ 32.560601] __vm_munmap+0x138/0x3a0 [ 32.561071] __x64_sys_munmap+0x59/0x80 [ 32.561578] do_syscall_64+0x3f/0x90 [ 32.562066] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.562725] [ 32.562942] The buggy address belongs to the object at ffff888018171bc8 [ 32.562942] which belongs to the cache vm_area_struct of size 168 [ 32.564440] The buggy address is located 88 bytes inside of [ 32.564440] freed 168-byte region [ffff888018171bc8, ffff888018171c70) [ 32.565840] [ 32.566058] The buggy address belongs to the physical page: [ 32.566742] page:0000000044e56e6c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18171 [ 32.567872] memcg:ffff8880192ed201 [ 32.568300] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.568952] page_type: 0xffffffff() [ 32.569400] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.570312] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880192ed201 [ 32.571218] page dumped because: kasan: bad access detected [ 32.571906] [ 32.572121] Memory state around the buggy address: [ 32.572694] ffff888018171b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.573549] ffff888018171b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.574399] >ffff888018171c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.575257] ^ [ 32.575824] ffff888018171c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 32.576678] ffff888018171d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 32.577526] ================================================================== [ 32.578573] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.575319] BUG: Bad rss-counter state mm:00000000547afdb9 type:MM_FILEPAGES val:33 [ 34.576789] BUG: Bad rss-counter state mm:00000000547afdb9 type:MM_ANONPAGES val:22 [ 34.948584] BUG: Bad rss-counter state mm:00000000376fea3f type:MM_FILEPAGES val:33 [ 34.949360] BUG: Bad rss-counter state mm:00000000376fea3f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54574' (ECDSA) to the list of known hosts. 2023/06/20 00:31:13 fuzzer started 2023/06/20 00:31:14 dialing manager at localhost:44161 2023/06/20 00:31:14 checking machine... 2023/06/20 00:31:14 checking revisions... [ 35.684020] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:31:14 testing simple program... [ 35.737678] cgroup: Unknown subsys name 'net' [ 35.784567] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:31:12 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fff6c7ad7c8 CR3=0000000008eec000 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=2033313a31333a3030203032206e754a XMM01=657463656e6e6f63736944203a5d3533 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3533325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a31333a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800f1ae140 RCX=0000000000000000 RDX=ffff88801477d1c0 RSI=000000000000003f RDI=ffffffff818283c3 RBP=0000000000000040 RSP=ffff888016c0f8a0 R8 =0000000000000006 R9 =0000000000005a94 R10=0000000000005b0c R11=0000000000000000 R12=0000000000000200 R13=ffff88800f1ae000 R14=000000000000003f R15=ffff88800f1ae000 RIP=ffffffff81534337 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 00007f3dcfa57900 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=00007f3dd000f0b0 CR3=000000000ca4c000 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=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