syzkaller login: [ 48.336407] BUG: Bad rss-counter state mm:0000000015a0bb44 type:MM_FILEPAGES val:33 [ 48.337630] BUG: Bad rss-counter state mm:0000000015a0bb44 type:MM_ANONPAGES val:22 [ 48.494095] ================================================================== [ 48.494973] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 48.495853] Read of size 8 at addr ffff88800edd14e0 by task sshd/219 [ 48.496582] [ 48.496791] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 48.497731] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 48.498661] Call Trace: [ 48.498977] <TASK> [ 48.499246] dump_stack_lvl+0x91/0xf0 [ 48.499704] print_report+0xcc/0x620 [ 48.500171] ? __virt_addr_valid+0x102/0x340 [ 48.500700] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.501281] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.501868] kasan_report+0xbe/0xf0 [ 48.502319] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.502928] vma_interval_tree_remove+0xc75/0xec0 [ 48.503502] vma_prepare+0xc54/0x11a0 [ 48.503954] __split_vma+0x5af/0x950 [ 48.504402] ? __pfx___split_vma+0x10/0x10 [ 48.504921] ? find_held_lock+0x2c/0x110 [ 48.505440] do_vmi_align_munmap+0x2ba/0x11f0 [ 48.505999] ? lock_is_held_type+0x9f/0x120 [ 48.506537] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 48.507143] ? mtree_range_walk+0x632/0x900 [ 48.507686] ? mas_walk+0x5c7/0x7c0 [ 48.508153] do_vmi_munmap+0x1f1/0x2b0 [ 48.508648] mmap_region+0x1f9/0x2660 [ 48.509121] ? vm_mmap_pgoff+0x15c/0x3a0 [ 48.509623] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 48.510328] ? __pfx_lock_acquire+0x10/0x10 [ 48.510869] ? __pfx_mmap_region+0x10/0x10 [ 48.511397] ? security_mmap_addr+0x7d/0xa0 [ 48.511926] ? get_unmapped_area+0x1f5/0x3f0 [ 48.512473] do_mmap+0x854/0xf00 [ 48.512910] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.513397] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 48.513963] ksys_mmap_pgoff+0x3af/0x500 [ 48.514473] do_syscall_64+0x3f/0x90 [ 48.514949] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.515590] RIP: 0033:0x7ff5ab935d82 [ 48.516049] 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 [ 48.518181] RSP: 002b:00007ffe1b2c5ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 48.519092] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff5ab935d82 [ 48.519937] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff5aad6f000 [ 48.520778] RBP: 00007ff5aad6f000 R08: 0000000000000009 R09: 0000000000001000 [ 48.521622] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b039ad8b20 [ 48.522470] R13: 00007ffe1b2c5d00 R14: 00007ffe1b2c5d30 R15: 00007ffe1b2c6090 [ 48.523329] </TASK> [ 48.523615] [ 48.523827] Allocated by task 212: [ 48.524256] kasan_save_stack+0x22/0x50 [ 48.524751] kasan_set_track+0x25/0x30 [ 48.525233] __kasan_slab_alloc+0x59/0x70 [ 48.525755] kmem_cache_alloc+0x16b/0x370 [ 48.526263] vm_area_dup+0x20/0x160 [ 48.526706] __split_vma+0x170/0x950 [ 48.527386] split_vma+0xc6/0x110 [ 48.527942] mprotect_fixup+0x8d2/0xb30 [ 48.528579] do_mprotect_pkey+0x87e/0xd40 [ 48.529234] __x64_sys_mprotect+0x78/0xc0 [ 48.529896] do_syscall_64+0x3f/0x90 [ 48.530488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.531321] [ 48.531586] Freed by task 212: [ 48.532087] kasan_save_stack+0x22/0x50 [ 48.532715] kasan_set_track+0x25/0x30 [ 48.533337] kasan_save_free_info+0x2b/0x50 [ 48.534013] __kasan_slab_free+0x10a/0x190 [ 48.534685] kmem_cache_free+0x10d/0x4d0 [ 48.535347] rcu_core+0x8c8/0x2860 [ 48.535908] __do_softirq+0x1b7/0x7d4 [ 48.536508] [ 48.536772] Last potentially related work creation: [ 48.537514] kasan_save_stack+0x22/0x50 [ 48.538149] __kasan_record_aux_stack+0x8e/0xa0 [ 48.538874] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.539681] remove_vma+0x139/0x170 [ 48.540249] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.540940] do_vmi_munmap+0x1f1/0x2b0 [ 48.541546] __vm_munmap+0x138/0x3a0 [ 48.542133] __x64_sys_munmap+0x59/0x80 [ 48.542773] do_syscall_64+0x3f/0x90 [ 48.543359] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.543996] [ 48.544211] Second to last potentially related work creation: [ 48.544886] kasan_save_stack+0x22/0x50 [ 48.545389] __kasan_record_aux_stack+0x8e/0xa0 [ 48.545954] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.546590] remove_vma+0x139/0x170 [ 48.547036] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.547585] do_vmi_munmap+0x1f1/0x2b0 [ 48.548068] mmap_region+0x1f9/0x2660 [ 48.548534] do_mmap+0x854/0xf00 [ 48.548959] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.549440] ksys_mmap_pgoff+0x3af/0x500 [ 48.549933] do_syscall_64+0x3f/0x90 [ 48.550393] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.551027] [ 48.551239] The buggy address belongs to the object at ffff88800edd1488 [ 48.551239] which belongs to the cache vm_area_struct of size 168 [ 48.552697] The buggy address is located 88 bytes inside of [ 48.552697] freed 168-byte region [ffff88800edd1488, ffff88800edd1530) [ 48.554094] [ 48.554307] The buggy address belongs to the physical page: [ 48.554989] page:00000000a99c0516 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedd1 [ 48.556059] memcg:ffff888013f90e01 [ 48.556485] flags: 0x100000000000200(slab|node=0|zone=1) [ 48.557129] page_type: 0xffffffff() [ 48.557569] raw: 0100000000000200 ffff88800879fc80 ffffea00003b20c0 dead000000000006 [ 48.558470] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f90e01 [ 48.559380] page dumped because: kasan: bad access detected [ 48.560031] [ 48.560241] Memory state around the buggy address: [ 48.560810] ffff88800edd1380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 48.561656] ffff88800edd1400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 48.562509] >ffff88800edd1480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.563356] ^ [ 48.564105] ffff88800edd1500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 48.564945] ffff88800edd1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.565785] ================================================================== [ 48.566768] Disabling lock debugging due to kernel taint [ 50.427907] BUG: Bad rss-counter state mm:000000006041e2d4 type:MM_FILEPAGES val:33 [ 50.428920] BUG: Bad rss-counter state mm:000000006041e2d4 type:MM_ANONPAGES val:22 [ 50.959297] BUG: Bad rss-counter state mm:00000000979419d2 type:MM_FILEPAGES val:33 [ 50.960481] BUG: Bad rss-counter state mm:00000000979419d2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15980' (ECDSA) to the list of known hosts. 2023/06/19 19:16:32 fuzzer started 2023/06/19 19:16:32 dialing manager at localhost:44161 2023/06/19 19:16:32 checking machine... 2023/06/19 19:16:32 checking revisions... [ 51.588324] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:16:32 testing simple program... [ 51.634886] cgroup: Unknown subsys name 'net' [ 51.696802] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:16:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff81a45640 RCX=0000000000000100 RDX=ffff888017c93680 RSI=ffffffff818d9dbe RDI=ffff88801973da88 RBP=ffff88801973da88 RSP=ffff88806ce09e40 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88806ce09ee8 R14=ffff88806ce35000 R15=ffff88801973dc70 RIP=ffffffff84532446 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 00007fef3c585900 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=00007ffe2f359000 CR3=000000000e860000 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=6720646572637465733a4d41503d706f 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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fb8a2ad88d0 CR3=0000000015d8a000 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=2032333a36313a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a36313a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000