syzkaller login: [ 68.892736] BUG: Bad rss-counter state mm:00000000f8782142 type:MM_FILEPAGES val:33 [ 68.894113] BUG: Bad rss-counter state mm:00000000f8782142 type:MM_ANONPAGES val:22 [ 69.047262] ================================================================== [ 69.048235] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 69.049178] Read of size 8 at addr ffff888019b016b0 by task sshd/228 [ 69.049956] [ 69.050278] CPU: 0 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 69.051144] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 69.052159] Call Trace: [ 69.052499] [ 69.052785] dump_stack_lvl+0x91/0xf0 [ 69.053285] print_report+0xcc/0x620 [ 69.053769] ? __virt_addr_valid+0x102/0x340 [ 69.054320] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.054937] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.055554] kasan_report+0xbe/0xf0 [ 69.056040] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.056666] vma_interval_tree_remove+0xc75/0xec0 [ 69.057272] vma_prepare+0xc54/0x11a0 [ 69.057754] __split_vma+0x5af/0x950 [ 69.058232] ? __pfx___split_vma+0x10/0x10 [ 69.058774] ? find_held_lock+0x2c/0x110 [ 69.059293] do_vmi_align_munmap+0x2ba/0x11f0 [ 69.059873] ? lock_is_held_type+0x9f/0x120 [ 69.060410] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 69.061018] ? mtree_range_walk+0x632/0x900 [ 69.061574] ? mas_walk+0x5c7/0x7c0 [ 69.062052] do_vmi_munmap+0x1f1/0x2b0 [ 69.062547] mmap_region+0x1f9/0x2660 [ 69.063036] ? vm_mmap_pgoff+0x15c/0x3a0 [ 69.063557] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 69.064298] ? __pfx_lock_acquire+0x10/0x10 [ 69.064839] ? __pfx_mmap_region+0x10/0x10 [ 69.065381] ? security_mmap_addr+0x7d/0xa0 [ 69.065914] ? get_unmapped_area+0x1f5/0x3f0 [ 69.066477] do_mmap+0x854/0xf00 [ 69.066930] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.067435] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 69.068002] ksys_mmap_pgoff+0x3af/0x500 [ 69.068509] do_syscall_64+0x3f/0x90 [ 69.068991] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.069641] RIP: 0033:0x7f623ee93d82 [ 69.070101] 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 [ 69.072288] RSP: 002b:00007ffc0fe254b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.073203] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f623ee93d82 [ 69.074067] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f623e2cd000 [ 69.074911] RBP: 00007f623e2cd000 R08: 0000000000000009 R09: 0000000000001000 [ 69.075784] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558e22fd9ec0 [ 69.076628] R13: 00007ffc0fe254d0 R14: 00007ffc0fe25500 R15: 00007ffc0fe25860 [ 69.077507] [ 69.077803] [ 69.078018] Allocated by task 221: [ 69.078448] kasan_save_stack+0x22/0x50 [ 69.078957] kasan_set_track+0x25/0x30 [ 69.079451] __kasan_slab_alloc+0x59/0x70 [ 69.079980] kmem_cache_alloc+0x16b/0x370 [ 69.080505] vm_area_dup+0x20/0x160 [ 69.080968] __split_vma+0x170/0x950 [ 69.081439] split_vma+0xc6/0x110 [ 69.081876] mprotect_fixup+0x8d2/0xb30 [ 69.082380] do_mprotect_pkey+0x87e/0xd40 [ 69.082908] __x64_sys_mprotect+0x78/0xc0 [ 69.083430] do_syscall_64+0x3f/0x90 [ 69.083924] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.084569] [ 69.084784] Freed by task 221: [ 69.085172] kasan_save_stack+0x22/0x50 [ 69.085684] kasan_set_track+0x25/0x30 [ 69.086185] kasan_save_free_info+0x2b/0x50 [ 69.086722] __kasan_slab_free+0x10a/0x190 [ 69.087257] kmem_cache_free+0x10d/0x4d0 [ 69.087775] rcu_core+0x8c8/0x2860 [ 69.088218] __do_softirq+0x1b7/0x7d4 [ 69.088694] [ 69.088909] Last potentially related work creation: [ 69.089497] kasan_save_stack+0x22/0x50 [ 69.090008] __kasan_record_aux_stack+0x8e/0xa0 [ 69.090584] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.091231] remove_vma+0x139/0x170 [ 69.091682] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.092261] do_vmi_munmap+0x1f1/0x2b0 [ 69.092750] __vm_munmap+0x138/0x3a0 [ 69.093214] __x64_sys_munmap+0x59/0x80 [ 69.093713] do_syscall_64+0x3f/0x90 [ 69.094187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.094833] [ 69.095046] The buggy address belongs to the object at ffff888019b01658 [ 69.095046] which belongs to the cache vm_area_struct of size 168 [ 69.096525] The buggy address is located 88 bytes inside of [ 69.096525] freed 168-byte region [ffff888019b01658, ffff888019b01700) [ 69.097939] [ 69.098153] The buggy address belongs to the physical page: [ 69.098822] page:0000000009c77d5c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b01 [ 69.099923] memcg:ffff888016b0c001 [ 69.100349] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.100996] page_type: 0xffffffff() [ 69.101449] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 69.102373] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b0c001 [ 69.103275] page dumped because: kasan: bad access detected [ 69.103952] [ 69.104168] Memory state around the buggy address: [ 69.104755] ffff888019b01580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 69.105613] ffff888019b01600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 69.106471] >ffff888019b01680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.107325] ^ [ 69.107916] ffff888019b01700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 69.108771] ffff888019b01780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 69.109625] ================================================================== [ 69.110593] Disabling lock debugging due to kernel taint [ 71.074004] BUG: Bad rss-counter state mm:00000000403d6503 type:MM_FILEPAGES val:33 [ 71.075246] BUG: Bad rss-counter state mm:00000000403d6503 type:MM_ANONPAGES val:22 [ 71.627708] BUG: Bad rss-counter state mm:000000009a3ba3d6 type:MM_FILEPAGES val:33 [ 71.628904] BUG: Bad rss-counter state mm:000000009a3ba3d6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32913' (ECDSA) to the list of known hosts. 2023/06/21 02:18:22 fuzzer started 2023/06/21 02:18:23 dialing manager at localhost:36067 2023/06/21 02:18:23 checking machine... 2023/06/21 02:18:23 checking revisions... [ 72.275725] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:18:23 testing simple program... [ 72.329578] cgroup: Unknown subsys name 'net' [ 72.383054] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:18:22 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015b951c0 RSI=ffffffff8170f2fd RDI=0000000000000007 RBP=ffff8880142bfd90 RSP=ffff8880142bfbf8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000088 R11=0000000000000000 R12=ffffea0000613c00 R13=ffff88800e780bc8 R14=ffff8880142bfdb8 R15=0000000000000088 RIP=ffffffff814c089b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa050b9f900 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=00007fa04fff64d0 CR3=000000000c756000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=3db18906386c430b00000000000ae988 XMM05=17f578b6993e09b30000000000135338 XMM06=156ab7a4a885795100000000001340d8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff88806cf09ff0 RSI=ffff88806cf09fb8 RDI=ffff88806cf09aa8 RBP=ffff88806cf09b30 RSP=ffff88806cf09a98 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88801b6c77a0 RIP=ffffffff810bd057 RFL=00000296 [--S-AP-] 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 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=00007f4f2f1f90b0 CR3=0000000016388000 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=2032323a38313a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3833 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3833325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a38313a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000