syzkaller login: [ 41.502314] BUG: Bad rss-counter state mm:000000002deeb6fb type:MM_FILEPAGES val:33 [ 41.504668] BUG: Bad rss-counter state mm:000000002deeb6fb type:MM_ANONPAGES val:22 [ 41.661225] ================================================================== [ 41.662134] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.663091] Read of size 8 at addr ffff88800e6c0140 by task sshd/220 [ 41.663860] [ 41.664173] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.665048] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.666029] Call Trace: [ 41.666355] [ 41.666643] dump_stack_lvl+0x91/0xf0 [ 41.667133] print_report+0xcc/0x620 [ 41.667620] ? __virt_addr_valid+0x102/0x340 [ 41.668166] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.668807] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.669427] kasan_report+0xbe/0xf0 [ 41.669925] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.670566] vma_interval_tree_remove+0xc75/0xec0 [ 41.671196] vma_prepare+0xc54/0x11a0 [ 41.671698] __split_vma+0x5af/0x950 [ 41.672177] ? __pfx___split_vma+0x10/0x10 [ 41.672719] ? find_held_lock+0x2c/0x110 [ 41.673244] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.673810] ? lock_is_held_type+0x9f/0x120 [ 41.674350] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.674957] ? mtree_range_walk+0x632/0x900 [ 41.675513] ? mas_walk+0x5c7/0x7c0 [ 41.675987] do_vmi_munmap+0x1f1/0x2b0 [ 41.676510] mmap_region+0x1f9/0x2660 [ 41.676994] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.677528] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.678289] ? __pfx_lock_acquire+0x10/0x10 [ 41.678853] ? __pfx_mmap_region+0x10/0x10 [ 41.679419] ? security_mmap_addr+0x7d/0xa0 [ 41.679982] ? get_unmapped_area+0x1f5/0x3f0 [ 41.680577] do_mmap+0x854/0xf00 [ 41.681032] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.681564] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.682157] ksys_mmap_pgoff+0x3af/0x500 [ 41.682703] do_syscall_64+0x3f/0x90 [ 41.683207] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.683895] RIP: 0033:0x7efdf7f0ed82 [ 41.684404] 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 [ 41.686688] RSP: 002b:00007ffc7db22528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.687644] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efdf7f0ed82 [ 41.688558] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efdf7348000 [ 41.689467] RBP: 00007efdf7348000 R08: 0000000000000009 R09: 0000000000001000 [ 41.690378] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562e25345ec0 [ 41.691283] R13: 00007ffc7db22540 R14: 00007ffc7db22570 R15: 00007ffc7db228d0 [ 41.692199] [ 41.692524] [ 41.692754] Allocated by task 213: [ 41.693209] kasan_save_stack+0x22/0x50 [ 41.693740] kasan_set_track+0x25/0x30 [ 41.694271] __kasan_slab_alloc+0x59/0x70 [ 41.694823] kmem_cache_alloc+0x16b/0x370 [ 41.695372] vm_area_dup+0x20/0x160 [ 41.695854] __split_vma+0x170/0x950 [ 41.696353] split_vma+0xc6/0x110 [ 41.696850] mprotect_fixup+0x8d2/0xb30 [ 41.697377] do_mprotect_pkey+0x87e/0xd40 [ 41.697929] __x64_sys_mprotect+0x78/0xc0 [ 41.698481] do_syscall_64+0x3f/0x90 [ 41.698987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.699672] [ 41.699899] Freed by task 213: [ 41.700313] kasan_save_stack+0x22/0x50 [ 41.700857] kasan_set_track+0x25/0x30 [ 41.701384] kasan_save_free_info+0x2b/0x50 [ 41.701948] __kasan_slab_free+0x10a/0x190 [ 41.702512] kmem_cache_free+0x10d/0x4d0 [ 41.703051] rcu_core+0x8c8/0x2860 [ 41.703521] __do_softirq+0x1b7/0x7d4 [ 41.704028] [ 41.704256] Last potentially related work creation: [ 41.704891] kasan_save_stack+0x22/0x50 [ 41.705427] __kasan_record_aux_stack+0x8e/0xa0 [ 41.706048] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.706738] remove_vma+0x139/0x170 [ 41.707218] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.707807] do_vmi_munmap+0x1f1/0x2b0 [ 41.708327] __vm_munmap+0x138/0x3a0 [ 41.708849] __x64_sys_munmap+0x59/0x80 [ 41.709372] do_syscall_64+0x3f/0x90 [ 41.709876] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.710560] [ 41.710789] Second to last potentially related work creation: [ 41.711519] kasan_save_stack+0x22/0x50 [ 41.712053] __kasan_record_aux_stack+0x8e/0xa0 [ 41.712668] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.713347] remove_vma+0x139/0x170 [ 41.713820] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.714409] do_vmi_munmap+0x1f1/0x2b0 [ 41.714922] mmap_region+0x1f9/0x2660 [ 41.715423] do_mmap+0x854/0xf00 [ 41.715881] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.716420] ksys_mmap_pgoff+0x3af/0x500 [ 41.716954] do_syscall_64+0x3f/0x90 [ 41.717458] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.718138] [ 41.718368] The buggy address belongs to the object at ffff88800e6c00e8 [ 41.718368] which belongs to the cache vm_area_struct of size 168 [ 41.719933] The buggy address is located 88 bytes inside of [ 41.719933] freed 168-byte region [ffff88800e6c00e8, ffff88800e6c0190) [ 41.721441] [ 41.721675] The buggy address belongs to the physical page: [ 41.722376] page:0000000033c41a4b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6c0 [ 41.723528] memcg:ffff88800eb61301 [ 41.723978] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.724698] page_type: 0xffffffff() [ 41.725184] raw: 0100000000000200 ffff88800879fc80 ffffea00003c1ac0 dead000000000004 [ 41.726155] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb61301 [ 41.727130] page dumped because: kasan: bad access detected [ 41.727832] [ 41.728059] Memory state around the buggy address: [ 41.728701] ffff88800e6c0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.729609] ffff88800e6c0080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 41.730516] >ffff88800e6c0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.731422] ^ [ 41.732099] ffff88800e6c0180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 41.733029] ffff88800e6c0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 41.733928] ================================================================== [ 41.735047] Disabling lock debugging due to kernel taint [ 43.707736] BUG: Bad rss-counter state mm:000000002fefb6ed type:MM_FILEPAGES val:33 [ 43.708835] BUG: Bad rss-counter state mm:000000002fefb6ed type:MM_ANONPAGES val:22 [ 44.196462] BUG: Bad rss-counter state mm:000000003550db51 type:MM_FILEPAGES val:33 [ 44.197477] BUG: Bad rss-counter state mm:000000003550db51 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44303' (ECDSA) to the list of known hosts. 2023/06/19 17:22:26 fuzzer started 2023/06/19 17:22:26 dialing manager at localhost:44161 2023/06/19 17:22:26 checking machine... 2023/06/19 17:22:26 checking revisions... [ 44.944706] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:22:26 testing simple program... [ 44.998574] cgroup: Unknown subsys name 'net' [ 45.062049] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:22:14 Registers: info registers vcpu 0 RAX=ffffffff849f3ce0 RBX=00000000561e298a RCX=0000000000000003 RDX=ffff8880164f9b40 RSI=0000000000000000 RDI=0000000000000000 RBP=000000004b20c785 RSP=ffff888016c1f540 R8 =0000000000000006 R9 =0000000097f8fab0 R10=000000000000000d R11=0000000000000000 R12=dffffc0000000000 R13=ffffffff849f2c00 R14=000000000000000d R15=ffff88800d53e164 RIP=ffffffff8219de9a RFL=00000206 [-----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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff789ffa900 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=00007ff7893f47d0 CR3=000000000d80c000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=8d0e55d08bbb31bf00000000000ae988 XMM05=9f9b9362fe5a917400000000001364c8 XMM06=4fda316b135da52b00000000001352b8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=1ffff11001fbfdd0 RCX=ffffffff812d8ec3 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88800fdfee60 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180efb5 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 00007f6c336c7900 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=00007f6c33671008 CR3=000000000e874000 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