syzkaller login: [ 33.442514] BUG: Bad rss-counter state mm:00000000bda6d3b3 type:MM_FILEPAGES val:33 [ 33.443862] BUG: Bad rss-counter state mm:00000000bda6d3b3 type:MM_ANONPAGES val:22 [ 33.493334] ================================================================== [ 33.494297] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.495466] Read of size 8 at addr ffff888019b8dc20 by task sshd/220 [ 33.496258] [ 33.496487] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.497380] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.498393] Call Trace: [ 33.498732] [ 33.499032] dump_stack_lvl+0x91/0xf0 [ 33.499546] print_report+0xcc/0x620 [ 33.500040] ? __virt_addr_valid+0x102/0x340 [ 33.500598] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.501235] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.501879] kasan_report+0xbe/0xf0 [ 33.502373] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.503025] vma_interval_tree_remove+0xc75/0xec0 [ 33.503647] vma_prepare+0xc54/0x11a0 [ 33.504143] __split_vma+0x5af/0x950 [ 33.504626] ? __pfx___split_vma+0x10/0x10 [ 33.505179] ? find_held_lock+0x2c/0x110 [ 33.505717] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.506303] ? lock_is_held_type+0x9f/0x120 [ 33.506881] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.507508] ? mtree_range_walk+0x632/0x900 [ 33.508082] ? mas_walk+0x5c7/0x7c0 [ 33.508574] do_vmi_munmap+0x1f1/0x2b0 [ 33.509076] mmap_region+0x1f9/0x2660 [ 33.509572] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.510110] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.510871] ? __pfx_lock_acquire+0x10/0x10 [ 33.511429] ? __pfx_mmap_region+0x10/0x10 [ 33.511975] ? security_mmap_addr+0x7d/0xa0 [ 33.512523] ? get_unmapped_area+0x1f5/0x3f0 [ 33.513092] do_mmap+0x854/0xf00 [ 33.513549] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.514064] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.514677] ksys_mmap_pgoff+0x3af/0x500 [ 33.515208] do_syscall_64+0x3f/0x90 [ 33.515714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.516392] RIP: 0033:0x7feadfe08d82 [ 33.516871] 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 [ 33.519104] RSP: 002b:00007fff2fc811f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.520048] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feadfe08d82 [ 33.520938] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feadf242000 [ 33.521829] RBP: 00007feadf242000 R08: 0000000000000009 R09: 0000000000001000 [ 33.522716] R10: 0000000000000812 R11: 0000000000000206 R12: 00005640434f6ec0 [ 33.523609] R13: 00007fff2fc81210 R14: 00007fff2fc81240 R15: 00007fff2fc815a0 [ 33.524501] [ 33.524799] [ 33.525021] Allocated by task 213: [ 33.525467] kasan_save_stack+0x22/0x50 [ 33.525998] kasan_set_track+0x25/0x30 [ 33.526515] __kasan_slab_alloc+0x59/0x70 [ 33.527081] kmem_cache_alloc+0x16b/0x370 [ 33.527622] vm_area_dup+0x20/0x160 [ 33.528093] __split_vma+0x170/0x950 [ 33.528581] split_vma+0xc6/0x110 [ 33.529039] mprotect_fixup+0x8d2/0xb30 [ 33.529563] do_mprotect_pkey+0x87e/0xd40 [ 33.530110] __x64_sys_mprotect+0x78/0xc0 [ 33.530668] do_syscall_64+0x3f/0x90 [ 33.531164] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.531831] [ 33.532050] Freed by task 213: [ 33.532458] kasan_save_stack+0x22/0x50 [ 33.532980] kasan_set_track+0x25/0x30 [ 33.533491] kasan_save_free_info+0x2b/0x50 [ 33.534051] __kasan_slab_free+0x10a/0x190 [ 33.534611] kmem_cache_free+0x10d/0x4d0 [ 33.535160] rcu_core+0x8c8/0x2860 [ 33.535620] __do_softirq+0x1b7/0x7d4 [ 33.536123] [ 33.536351] Last potentially related work creation: [ 33.536967] kasan_save_stack+0x22/0x50 [ 33.537490] __kasan_record_aux_stack+0x8e/0xa0 [ 33.538083] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.538860] remove_vma+0x139/0x170 [ 33.539323] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.539899] do_vmi_munmap+0x1f1/0x2b0 [ 33.540404] __vm_munmap+0x138/0x3a0 [ 33.540893] __x64_sys_munmap+0x59/0x80 [ 33.541406] do_syscall_64+0x3f/0x90 [ 33.541894] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.542560] [ 33.542804] The buggy address belongs to the object at ffff888019b8dbc8 [ 33.542804] which belongs to the cache vm_area_struct of size 168 [ 33.544353] The buggy address is located 88 bytes inside of [ 33.544353] freed 168-byte region [ffff888019b8dbc8, ffff888019b8dc70) [ 33.545825] [ 33.546044] The buggy address belongs to the physical page: [ 33.546752] page:000000007e07075b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b8d [ 33.547888] memcg:ffff88800db65501 [ 33.548343] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.549025] page_type: 0xffffffff() [ 33.549489] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.550456] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db65501 [ 33.551422] page dumped because: kasan: bad access detected [ 33.552108] [ 33.552330] Memory state around the buggy address: [ 33.552939] ffff888019b8db00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.553830] ffff888019b8db80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 33.554720] >ffff888019b8dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.555579] ^ [ 33.556109] ffff888019b8dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.556963] ffff888019b8dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.557807] ================================================================== [ 33.558764] Disabling lock debugging due to kernel taint [ 36.216141] BUG: Bad rss-counter state mm:00000000b2dca29d type:MM_FILEPAGES val:33 [ 36.217229] BUG: Bad rss-counter state mm:00000000b2dca29d type:MM_ANONPAGES val:22 [ 36.727840] BUG: Bad rss-counter state mm:00000000f072d358 type:MM_FILEPAGES val:33 [ 36.728744] BUG: Bad rss-counter state mm:00000000f072d358 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42956' (ECDSA) to the list of known hosts. 2023/06/19 19:35:23 fuzzer started 2023/06/19 19:35:24 dialing manager at localhost:44161 2023/06/19 19:35:24 checking machine... 2023/06/19 19:35:24 checking revisions... [ 37.426064] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:35:24 testing simple program... [ 37.479660] cgroup: Unknown subsys name 'net' [ 37.518367] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:35:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801931e5c0 RCX=ffffffff81f196a7 RDX=ffff88800b913680 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88801931e5f8 RSP=ffff888016e3fc98 R8 =0000000000000001 R9 =0000000000000001 R10=0000000000000001 R11=0000000000000000 R12=0000000000000001 R13=0000000000000001 R14=0000000000000001 R15=ffff88801931e5c0 RIP=ffffffff814c07e0 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 00007fefd12a3900 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=00007fffff0a9000 CR3=0000000019ca0000 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=6c697473206e61632073726573552023 XMM01=20656c706f657020726568746f20776f XMM02=ffffffffffffff00ffff000000000000 XMM03=796e6120776f6c6c6120746f6e206f74 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800f2f8000 RCX=0000000000000000 RDX=000000000001c060 RSI=ffffffff821920cb RDI=0000000000000007 RBP=ffff88800f2f8098 RSP=ffff8880199277c8 R8 =0000000000000007 R9 =0000000000010000 R10=000000000001c060 R11=0000000000000000 R12=000000000001c060 R13=ffff88800f2f81a0 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff821920cf RFL=00000093 [--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 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=00007f28040c8000 CR3=000000000da84000 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=29e85c8a51a357a51c43061c1252950b XMM02=000000000011fa40eff9b2d0a8fce9cb XMM03=000000000011fb102c67c8bc2e329bc3 XMM04=c8f248717f0e60c700000000000ae988 XMM05=cfc9c564494623bc0000000000134ec0 XMM06=4a621cf4fabe269c0000000000133c60 XMM07=fb795ef6d65770560000000000124198 XMM08=2c67c8bc2e329bc3000000000011fab0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000