syzkaller login: [ 30.513287] BUG: Bad rss-counter state mm:000000002db6d994 type:MM_FILEPAGES val:33 [ 30.514013] BUG: Bad rss-counter state mm:000000002db6d994 type:MM_ANONPAGES val:22 [ 30.650158] ================================================================== [ 30.650814] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.651774] Read of size 8 at addr ffff888015ef03f8 by task sshd/219 [ 30.652455] [ 30.652640] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.653359] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.654221] Call Trace: [ 30.654501] [ 30.654759] dump_stack_lvl+0x91/0xf0 [ 30.655354] print_report+0xcc/0x620 [ 30.655783] ? __virt_addr_valid+0x102/0x340 [ 30.656274] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.656802] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.657333] kasan_report+0xbe/0xf0 [ 30.657698] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.658146] vma_interval_tree_remove+0xc75/0xec0 [ 30.658815] vma_prepare+0xc54/0x11a0 [ 30.659158] __split_vma+0x5af/0x950 [ 30.659495] ? __pfx___split_vma+0x10/0x10 [ 30.659857] ? find_held_lock+0x2c/0x110 [ 30.660220] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.660612] ? lock_is_held_type+0x9f/0x120 [ 30.660980] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.661401] ? mtree_range_walk+0x632/0x900 [ 30.661785] ? mas_walk+0x5c7/0x7c0 [ 30.662116] do_vmi_munmap+0x1f1/0x2b0 [ 30.662452] mmap_region+0x1f9/0x2660 [ 30.662793] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.663152] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.663687] ? __pfx_lock_acquire+0x10/0x10 [ 30.664046] ? __pfx_mmap_region+0x10/0x10 [ 30.664409] ? security_mmap_addr+0x7d/0xa0 [ 30.664767] ? get_unmapped_area+0x1f5/0x3f0 [ 30.665137] do_mmap+0x854/0xf00 [ 30.665429] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.665756] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.666125] ksys_mmap_pgoff+0x3af/0x500 [ 30.666463] do_syscall_64+0x3f/0x90 [ 30.666782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.667207] RIP: 0033:0x7f0fd8434d82 [ 30.667523] 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 [ 30.668966] RSP: 002b:00007ffea5e6da68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.669579] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0fd8434d82 [ 30.670153] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0fd786e000 [ 30.670709] RBP: 00007f0fd786e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.671307] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557294c16ec0 [ 30.671925] R13: 00007ffea5e6da80 R14: 00007ffea5e6dab0 R15: 00007ffea5e6de10 [ 30.672513] [ 30.672718] [ 30.672863] Allocated by task 212: [ 30.673149] kasan_save_stack+0x22/0x50 [ 30.673491] kasan_set_track+0x25/0x30 [ 30.673819] __kasan_slab_alloc+0x59/0x70 [ 30.674162] kmem_cache_alloc+0x16b/0x370 [ 30.674504] vm_area_dup+0x20/0x160 [ 30.674805] __split_vma+0x170/0x950 [ 30.675119] split_vma+0xc6/0x110 [ 30.675412] mprotect_fixup+0x8d2/0xb30 [ 30.675790] do_mprotect_pkey+0x87e/0xd40 [ 30.676154] __x64_sys_mprotect+0x78/0xc0 [ 30.676513] do_syscall_64+0x3f/0x90 [ 30.676831] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.677246] [ 30.677385] Freed by task 212: [ 30.677637] kasan_save_stack+0x22/0x50 [ 30.677965] kasan_set_track+0x25/0x30 [ 30.678290] kasan_save_free_info+0x2b/0x50 [ 30.678642] __kasan_slab_free+0x10a/0x190 [ 30.678997] kmem_cache_free+0x10d/0x4d0 [ 30.679334] rcu_core+0x8c8/0x2860 [ 30.679670] __do_softirq+0x1b7/0x7d4 [ 30.679988] [ 30.680133] Last potentially related work creation: [ 30.680578] kasan_save_stack+0x22/0x50 [ 30.680909] __kasan_record_aux_stack+0x8e/0xa0 [ 30.681313] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.681764] remove_vma+0x139/0x170 [ 30.682083] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.682469] do_vmi_munmap+0x1f1/0x2b0 [ 30.682814] __vm_munmap+0x138/0x3a0 [ 30.683152] __x64_sys_munmap+0x59/0x80 [ 30.683543] do_syscall_64+0x3f/0x90 [ 30.683883] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.684345] [ 30.684498] The buggy address belongs to the object at ffff888015ef03a0 [ 30.684498] which belongs to the cache vm_area_struct of size 168 [ 30.685512] The buggy address is located 88 bytes inside of [ 30.685512] freed 168-byte region [ffff888015ef03a0, ffff888015ef0448) [ 30.686481] [ 30.686631] The buggy address belongs to the physical page: [ 30.687082] page:0000000084402bc8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15ef0 [ 30.687840] memcg:ffff88800f553d01 [ 30.688148] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.688611] page_type: 0xffffffff() [ 30.688938] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.689603] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f553d01 [ 30.690238] page dumped because: kasan: bad access detected [ 30.690708] [ 30.690865] Memory state around the buggy address: [ 30.691326] ffff888015ef0280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.691971] ffff888015ef0300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.692577] >ffff888015ef0380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.693172] ^ [ 30.693765] ffff888015ef0400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.694368] ffff888015ef0480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.694955] ================================================================== [ 30.696054] Disabling lock debugging due to kernel taint [ 32.823696] BUG: Bad rss-counter state mm:000000009ee2f125 type:MM_FILEPAGES val:33 [ 32.824648] BUG: Bad rss-counter state mm:000000009ee2f125 type:MM_ANONPAGES val:22 [ 33.282609] BUG: Bad rss-counter state mm:00000000a654e927 type:MM_FILEPAGES val:33 [ 33.283301] BUG: Bad rss-counter state mm:00000000a654e927 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16678' (ECDSA) to the list of known hosts. 2023/06/21 10:38:32 fuzzer started 2023/06/21 10:38:32 dialing manager at localhost:36067 2023/06/21 10:38:32 checking machine... 2023/06/21 10:38:32 checking revisions... [ 33.907739] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:38:33 testing simple program... [ 33.954549] cgroup: Unknown subsys name 'net' [ 34.018646] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:38:32 Registers: info registers vcpu 0 RAX=ffffffff8111a670 RBX=0000000000000000 RCX=ffffffff81128d81 RDX=1ffffffff0a58f99 RSI=0000000000000000 RDI=00000000000000b0 RBP=ffffffff852c7cc0 RSP=ffff88806ce09fd8 R8 =0000000000000001 R9 =ffffed100d9c5059 R10=ffff88806ce282cf R11=ffff88806ce09ff8 R12=0000000000000001 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8111a67c 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 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=00007ffbbbf057a0 CR3=000000000b804000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451268c RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff8460144a RBP=dffffc0000000000 RSP=ffff888008e07e08 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff846016b9 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 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=00007fbf27c6b328 CR3=0000000005482000 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