syzkaller login: [ 28.895557] BUG: Bad rss-counter state mm:00000000b629ce01 type:MM_FILEPAGES val:33 [ 28.896746] BUG: Bad rss-counter state mm:00000000b629ce01 type:MM_ANONPAGES val:22 [ 28.935354] ================================================================== [ 28.936531] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.937500] Read of size 8 at addr ffff88800eb97b38 by task sshd/220 [ 28.938494] [ 28.938714] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.939626] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.940892] Call Trace: [ 28.941286] [ 28.941579] dump_stack_lvl+0x91/0xf0 [ 28.942088] print_report+0xcc/0x620 [ 28.942585] ? __virt_addr_valid+0x102/0x340 [ 28.943169] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.943797] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.944423] kasan_report+0xbe/0xf0 [ 28.944896] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.945516] vma_interval_tree_remove+0xc75/0xec0 [ 28.946134] vma_prepare+0xc54/0x11a0 [ 28.946627] __split_vma+0x5af/0x950 [ 28.947105] ? __pfx___split_vma+0x10/0x10 [ 28.947635] ? find_held_lock+0x2c/0x110 [ 28.948164] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.948734] ? lock_is_held_type+0x9f/0x120 [ 28.949288] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.949909] ? mtree_range_walk+0x632/0x900 [ 28.950469] ? mas_walk+0x5c7/0x7c0 [ 28.950964] do_vmi_munmap+0x1f1/0x2b0 [ 28.951473] mmap_region+0x1f9/0x2660 [ 28.951963] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.952473] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.953189] ? __pfx_lock_acquire+0x10/0x10 [ 28.953725] ? __pfx_mmap_region+0x10/0x10 [ 28.954283] ? security_mmap_addr+0x7d/0xa0 [ 28.954839] ? get_unmapped_area+0x1f5/0x3f0 [ 28.955394] do_mmap+0x854/0xf00 [ 28.955834] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.956332] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.956896] ksys_mmap_pgoff+0x3af/0x500 [ 28.957409] do_syscall_64+0x3f/0x90 [ 28.957900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.958562] RIP: 0033:0x7f80fd72ed82 [ 28.959033] 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 [ 28.961179] RSP: 002b:00007ffd625d1fc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.962110] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f80fd72ed82 [ 28.962988] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f80fcb68000 [ 28.963847] RBP: 00007f80fcb68000 R08: 0000000000000009 R09: 0000000000001000 [ 28.964715] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b0b00d4f70 [ 28.965578] R13: 00007ffd625d1fe0 R14: 00007ffd625d2010 R15: 00007ffd625d2370 [ 28.966731] [ 28.967160] [ 28.967456] Allocated by task 212: [ 28.967899] kasan_save_stack+0x22/0x50 [ 28.968422] kasan_set_track+0x25/0x30 [ 28.968925] __kasan_slab_alloc+0x59/0x70 [ 28.969474] kmem_cache_alloc+0x16b/0x370 [ 28.969995] vm_area_dup+0x20/0x160 [ 28.970499] __split_vma+0x170/0x950 [ 28.970980] split_vma+0xc6/0x110 [ 28.971439] mprotect_fixup+0x8d2/0xb30 [ 28.971948] do_mprotect_pkey+0x87e/0xd40 [ 28.972511] __x64_sys_mprotect+0x78/0xc0 [ 28.973041] do_syscall_64+0x3f/0x90 [ 28.973521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.974173] [ 28.974390] Freed by task 212: [ 28.974798] kasan_save_stack+0x22/0x50 [ 28.975325] kasan_set_track+0x25/0x30 [ 28.975828] kasan_save_free_info+0x2b/0x50 [ 28.976362] __kasan_slab_free+0x10a/0x190 [ 28.976959] kmem_cache_free+0x10d/0x4d0 [ 28.977471] rcu_core+0x8c8/0x2860 [ 28.977934] __do_softirq+0x1b7/0x7d4 [ 28.978418] [ 28.978631] Last potentially related work creation: [ 28.979239] kasan_save_stack+0x22/0x50 [ 28.979748] __kasan_record_aux_stack+0x8e/0xa0 [ 28.980322] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.980980] remove_vma+0x139/0x170 [ 28.981497] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.982099] do_vmi_munmap+0x1f1/0x2b0 [ 28.982595] __vm_munmap+0x138/0x3a0 [ 28.983095] __x64_sys_munmap+0x59/0x80 [ 28.983595] do_syscall_64+0x3f/0x90 [ 28.984074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.984725] [ 28.984944] The buggy address belongs to the object at ffff88800eb97ae0 [ 28.984944] which belongs to the cache vm_area_struct of size 168 [ 28.986438] The buggy address is located 88 bytes inside of [ 28.986438] freed 168-byte region [ffff88800eb97ae0, ffff88800eb97b88) [ 28.987924] [ 28.988167] The buggy address belongs to the physical page: [ 28.988834] page:0000000095820541 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb97 [ 28.989946] memcg:ffff88800e0e7f01 [ 28.990401] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.991147] page_type: 0xffffffff() [ 28.991617] raw: 0100000000000200 ffff8880087a0c80 ffffea0000258640 dead000000000003 [ 28.992565] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0e7f01 [ 28.993512] page dumped because: kasan: bad access detected [ 28.994211] [ 28.994428] Memory state around the buggy address: [ 28.995053] ffff88800eb97a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.995946] ffff88800eb97a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 28.996831] >ffff88800eb97b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.997690] ^ [ 28.998324] ffff88800eb97b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 28.999205] ffff88800eb97c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.000079] ================================================================== [ 29.001141] Disabling lock debugging due to kernel taint [ 31.632291] BUG: Bad rss-counter state mm:0000000044856198 type:MM_FILEPAGES val:33 [ 31.633586] BUG: Bad rss-counter state mm:0000000044856198 type:MM_ANONPAGES val:22 [ 32.143775] BUG: Bad rss-counter state mm:00000000c7b262e3 type:MM_FILEPAGES val:33 [ 32.144854] BUG: Bad rss-counter state mm:00000000c7b262e3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37611' (ECDSA) to the list of known hosts. 2023/06/21 05:22:03 fuzzer started 2023/06/21 05:22:03 dialing manager at localhost:36067 2023/06/21 05:22:03 checking machine... 2023/06/21 05:22:03 checking revisions... [ 32.857876] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:22:03 testing simple program... [ 32.912425] cgroup: Unknown subsys name 'net' [ 32.965363] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:22:03 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000f976 RCX=0000000000000000 RDX=ffff888009f43680 RSI=ffffffff813bdd91 RDI=ffff88806ce3a100 RBP=ffff88806ce2b9c0 RSP=ffff88806ce09cd0 R8 =0000000000061000 R9 =ffff88806ce3965c R10=0000000000000000 R11=0000000000000001 R12=ffff88806ce39730 R13=ffff88806ce3a100 R14=dffffc0000000000 R15=ffff88806ce395c0 RIP=ffffffff813bddc3 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 00007fde148ec900 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=00007fde14ea3618 CR3=0000000014132000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86413686 RDX=0000000000000008 RSI=ffff88801438fad8 RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a20 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000009a995 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88801438fad8 R15=ffff88806cf09a98 RIP=ffffffff811303fa RFL=00000287 [--S--PC] 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 00007f34c8d8e900 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=00007f34c817ad70 CR3=000000000c7fe000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=894ed5c3a10e107e00000000000ae988 XMM05=b9a92ec42fc8b31a00000000001336e8 XMM06=4fda316b135da52b00000000001324d8 XMM07=fb795ef6d65770560000000000122078 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000