syzkaller login: [ 48.582177] BUG: Bad rss-counter state mm:00000000869ec760 type:MM_FILEPAGES val:33 [ 48.584007] BUG: Bad rss-counter state mm:00000000869ec760 type:MM_ANONPAGES val:22 [ 48.760511] ================================================================== [ 48.761620] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 48.762844] Read of size 8 at addr ffff88800f0f3228 by task sshd/220 [ 48.763610] [ 48.763825] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 48.764698] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 48.765659] Call Trace: [ 48.765980] [ 48.766267] dump_stack_lvl+0x91/0xf0 [ 48.766775] print_report+0xcc/0x620 [ 48.767254] ? __virt_addr_valid+0x102/0x340 [ 48.767818] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.768433] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.769041] kasan_report+0xbe/0xf0 [ 48.769517] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.770145] vma_interval_tree_remove+0xc75/0xec0 [ 48.770782] vma_prepare+0xc54/0x11a0 [ 48.771255] __split_vma+0x5af/0x950 [ 48.771738] ? __pfx___split_vma+0x10/0x10 [ 48.772276] ? find_held_lock+0x2c/0x110 [ 48.772800] do_vmi_align_munmap+0x2ba/0x11f0 [ 48.773367] ? lock_is_held_type+0x9f/0x120 [ 48.773906] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 48.774524] ? mtree_range_walk+0x632/0x900 [ 48.775101] ? mas_walk+0x5c7/0x7c0 [ 48.775580] do_vmi_munmap+0x1f1/0x2b0 [ 48.776074] mmap_region+0x1f9/0x2660 [ 48.776566] ? vm_mmap_pgoff+0x15c/0x3a0 [ 48.777073] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 48.777781] ? __pfx_lock_acquire+0x10/0x10 [ 48.778320] ? __pfx_mmap_region+0x10/0x10 [ 48.778872] ? security_mmap_addr+0x7d/0xa0 [ 48.779403] ? get_unmapped_area+0x1f5/0x3f0 [ 48.779961] do_mmap+0x854/0xf00 [ 48.780412] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.780904] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 48.781457] ksys_mmap_pgoff+0x3af/0x500 [ 48.781975] do_syscall_64+0x3f/0x90 [ 48.782449] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.783091] RIP: 0033:0x7f7e22ab0d82 [ 48.783556] 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 [ 48.785685] RSP: 002b:00007ffd4a1c6918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 48.786584] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7e22ab0d82 [ 48.787426] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7e21eea000 [ 48.788274] RBP: 00007f7e21eea000 R08: 0000000000000009 R09: 0000000000001000 [ 48.789113] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ed5aae1ec0 [ 48.789950] R13: 00007ffd4a1c6930 R14: 00007ffd4a1c6960 R15: 00007ffd4a1c6cc0 [ 48.790816] [ 48.791111] [ 48.791324] Allocated by task 213: [ 48.791785] kasan_save_stack+0x22/0x50 [ 48.792295] kasan_set_track+0x25/0x30 [ 48.792798] __kasan_slab_alloc+0x59/0x70 [ 48.793323] kmem_cache_alloc+0x16b/0x370 [ 48.793842] vm_area_dup+0x20/0x160 [ 48.794295] __split_vma+0x170/0x950 [ 48.794777] split_vma+0xc6/0x110 [ 48.795218] mprotect_fixup+0x8d2/0xb30 [ 48.795722] do_mprotect_pkey+0x87e/0xd40 [ 48.796246] __x64_sys_mprotect+0x78/0xc0 [ 48.796769] do_syscall_64+0x3f/0x90 [ 48.797244] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.797888] [ 48.798101] Freed by task 213: [ 48.798504] kasan_save_stack+0x22/0x50 [ 48.799063] kasan_set_track+0x25/0x30 [ 48.799550] kasan_save_free_info+0x2b/0x50 [ 48.800077] __kasan_slab_free+0x10a/0x190 [ 48.800607] kmem_cache_free+0x10d/0x4d0 [ 48.801113] rcu_core+0x8c8/0x2860 [ 48.801558] __do_softirq+0x1b7/0x7d4 [ 48.802043] [ 48.802258] Last potentially related work creation: [ 48.802852] kasan_save_stack+0x22/0x50 [ 48.803361] __kasan_record_aux_stack+0x8e/0xa0 [ 48.803940] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.804578] remove_vma+0x139/0x170 [ 48.805035] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.805595] do_vmi_munmap+0x1f1/0x2b0 [ 48.806083] __vm_munmap+0x138/0x3a0 [ 48.806565] __x64_sys_munmap+0x59/0x80 [ 48.807062] do_syscall_64+0x3f/0x90 [ 48.807540] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.808177] [ 48.808392] The buggy address belongs to the object at ffff88800f0f31d0 [ 48.808392] which belongs to the cache vm_area_struct of size 168 [ 48.809869] The buggy address is located 88 bytes inside of [ 48.809869] freed 168-byte region [ffff88800f0f31d0, ffff88800f0f3278) [ 48.811298] [ 48.811514] The buggy address belongs to the physical page: [ 48.812187] page:00000000a98345cc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0f3 [ 48.813273] memcg:ffff88800e4ba001 [ 48.813699] flags: 0x100000000000200(slab|node=0|zone=1) [ 48.814346] page_type: 0xffffffff() [ 48.814828] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 48.815759] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4ba001 [ 48.816656] page dumped because: kasan: bad access detected [ 48.817311] [ 48.817523] Memory state around the buggy address: [ 48.818103] ffff88800f0f3100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 48.818968] ffff88800f0f3180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 48.819890] >ffff88800f0f3200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 48.820743] ^ [ 48.821298] ffff88800f0f3280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 48.822161] ffff88800f0f3300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 48.823029] ================================================================== [ 48.824064] Disabling lock debugging due to kernel taint [ 50.896439] BUG: Bad rss-counter state mm:000000008f680f17 type:MM_FILEPAGES val:33 [ 50.897484] BUG: Bad rss-counter state mm:000000008f680f17 type:MM_ANONPAGES val:22 [ 51.416494] BUG: Bad rss-counter state mm:000000007792a820 type:MM_FILEPAGES val:33 [ 51.417647] BUG: Bad rss-counter state mm:000000007792a820 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61322' (ECDSA) to the list of known hosts. 2023/06/20 06:31:24 fuzzer started 2023/06/20 06:31:24 dialing manager at localhost:44161 2023/06/20 06:31:24 checking machine... 2023/06/20 06:31:24 checking revisions... [ 52.173500] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:31:24 testing simple program... [ 52.215949] cgroup: Unknown subsys name 'net' [ 52.258958] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:31:05 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=00007f242eab6240 CR3=000000000dd5e000 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=2034323a31333a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a31333a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007f4477400000 RBX=00007f4477400000 RCX=0000000000000000 RDX=ffff8880182a9b40 RSI=ffffffff817086fe RDI=0000000000000006 RBP=00007f4477540000 RSP=ffff88800c5cf948 R8 =0000000000000006 R9 =00007f4477400000 R10=00007f4477540000 R11=0000000000000000 R12=dffffc0000000000 R13=0000000000000000 R14=ffff88800c5cfaf8 R15=00007f4477540000 RIP=ffffffff81708701 RFL=00000293 [--S-A-C] 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 00007f4477570900 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=00007f447754f020 CR3=0000000019dfe000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000