syzkaller login: [ 30.770444] BUG: Bad rss-counter state mm:000000003b7aafb9 type:MM_FILEPAGES val:33 [ 30.771590] BUG: Bad rss-counter state mm:000000003b7aafb9 type:MM_ANONPAGES val:22 [ 30.947626] ================================================================== [ 30.948723] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.949683] Read of size 8 at addr ffff88801a228058 by task sshd/220 [ 30.950649] [ 30.950873] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.951787] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.952816] Call Trace: [ 30.953142] [ 30.953432] dump_stack_lvl+0x91/0xf0 [ 30.953935] print_report+0xcc/0x620 [ 30.954429] ? __virt_addr_valid+0x102/0x340 [ 30.954998] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.955626] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.956265] kasan_report+0xbe/0xf0 [ 30.956759] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.957392] vma_interval_tree_remove+0xc75/0xec0 [ 30.958009] vma_prepare+0xc54/0x11a0 [ 30.958498] __split_vma+0x5af/0x950 [ 30.958975] ? __pfx___split_vma+0x10/0x10 [ 30.959526] ? find_held_lock+0x2c/0x110 [ 30.960059] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.960657] ? lock_is_held_type+0x9f/0x120 [ 30.961226] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.961879] ? mtree_range_walk+0x632/0x900 [ 30.962443] ? mas_walk+0x5c7/0x7c0 [ 30.962930] do_vmi_munmap+0x1f1/0x2b0 [ 30.963427] mmap_region+0x1f9/0x2660 [ 30.963921] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.964457] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.965197] ? __pfx_lock_acquire+0x10/0x10 [ 30.965739] ? __pfx_mmap_region+0x10/0x10 [ 30.966276] ? security_mmap_addr+0x7d/0xa0 [ 30.966826] ? get_unmapped_area+0x1f5/0x3f0 [ 30.967388] do_mmap+0x854/0xf00 [ 30.967840] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.968359] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.968934] ksys_mmap_pgoff+0x3af/0x500 [ 30.969460] do_syscall_64+0x3f/0x90 [ 30.969962] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.970641] RIP: 0033:0x7f9ebb783d82 [ 30.971115] 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 [ 30.973281] RSP: 002b:00007fff3ff22928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.974200] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9ebb783d82 [ 30.975067] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9ebabbd000 [ 30.975925] RBP: 00007f9ebabbd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.976795] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558aca926ec0 [ 30.977674] R13: 00007fff3ff22940 R14: 00007fff3ff22970 R15: 00007fff3ff22cd0 [ 30.978583] [ 30.978893] [ 30.979116] Allocated by task 213: [ 30.979563] kasan_save_stack+0x22/0x50 [ 30.980084] kasan_set_track+0x25/0x30 [ 30.980613] __kasan_slab_alloc+0x59/0x70 [ 30.981159] kmem_cache_alloc+0x16b/0x370 [ 30.981705] vm_area_dup+0x20/0x160 [ 30.982181] __split_vma+0x170/0x950 [ 30.982672] split_vma+0xc6/0x110 [ 30.983134] mprotect_fixup+0x8d2/0xb30 [ 30.983663] do_mprotect_pkey+0x87e/0xd40 [ 30.984213] __x64_sys_mprotect+0x78/0xc0 [ 30.984782] do_syscall_64+0x3f/0x90 [ 30.985286] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.985964] [ 30.986188] Freed by task 213: [ 30.986593] kasan_save_stack+0x22/0x50 [ 30.987104] kasan_set_track+0x25/0x30 [ 30.987599] kasan_save_free_info+0x2b/0x50 [ 30.988140] __kasan_slab_free+0x10a/0x190 [ 30.988700] kmem_cache_free+0x10d/0x4d0 [ 30.989232] rcu_core+0x8c8/0x2860 [ 30.989688] __do_softirq+0x1b7/0x7d4 [ 30.990183] [ 30.990407] Last potentially related work creation: [ 30.991073] kasan_save_stack+0x22/0x50 [ 30.991601] __kasan_record_aux_stack+0x8e/0xa0 [ 30.992195] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.992883] remove_vma+0x139/0x170 [ 30.993349] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.993938] do_vmi_munmap+0x1f1/0x2b0 [ 30.994439] __vm_munmap+0x138/0x3a0 [ 30.994925] __x64_sys_munmap+0x59/0x80 [ 30.995438] do_syscall_64+0x3f/0x90 [ 30.995932] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.996609] [ 30.996832] The buggy address belongs to the object at ffff88801a228000 [ 30.996832] which belongs to the cache vm_area_struct of size 168 [ 30.998357] The buggy address is located 88 bytes inside of [ 30.998357] freed 168-byte region [ffff88801a228000, ffff88801a2280a8) [ 30.999825] [ 31.000048] The buggy address belongs to the physical page: [ 31.000744] page:0000000071bf60c3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a228 [ 31.001871] memcg:ffff88800e88e701 [ 31.002301] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.002967] page_type: 0xffffffff() [ 31.003433] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.004426] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e88e701 [ 31.005472] page dumped because: kasan: bad access detected [ 31.006241] [ 31.006493] Memory state around the buggy address: [ 31.007167] ffff88801a227f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.008173] ffff88801a227f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.009218] >ffff88801a228000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.010240] ^ [ 31.011117] ffff88801a228080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.012161] ffff88801a228100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.013215] ================================================================== [ 31.014389] Disabling lock debugging due to kernel taint [ 33.607768] BUG: Bad rss-counter state mm:000000004e778291 type:MM_FILEPAGES val:33 [ 33.608874] BUG: Bad rss-counter state mm:000000004e778291 type:MM_ANONPAGES val:22 [ 34.092772] BUG: Bad rss-counter state mm:000000006c0ef2a6 type:MM_FILEPAGES val:33 [ 34.093758] BUG: Bad rss-counter state mm:000000006c0ef2a6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53107' (ECDSA) to the list of known hosts. 2023/06/21 07:16:33 fuzzer started 2023/06/21 07:16:33 dialing manager at localhost:36067 2023/06/21 07:16:33 checking machine... 2023/06/21 07:16:33 checking revisions... [ 34.771404] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:16:34 testing simple program... [ 34.827145] cgroup: Unknown subsys name 'net' [ 34.867153] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:16:33 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000002 RCX=ffffffff86098092 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce099d8 R8 =ffffffff86098096 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09a98 R15=ffff88806ce09a98 RIP=ffffffff81130bd6 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 00007f564f8c9900 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=00007f564fe810b0 CR3=000000000caec000 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=2033333a36313a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a36313a3730203132 XMM08=3d64696720303d64697520612f6e3d64 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=0000000000000001 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=00007f8e2b13a490 CR3=000000000c5b4000 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=c6dbec74392bce90ba46c3e8331b34e1 XMM02=2c67c8bc2e329bc3000000000011a4f8 XMM03=fb795ef6d65770560000000000121a70 XMM04=fbafc464a455fb0500000000000ae988 XMM05=19e9129bd510f2350000000000131950 XMM06=4fda316b135da52b00000000001317d8 XMM07=e042d86d42eb936e0000000000121cf0 XMM08=395c1eaa7236852f000000000011a558 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000