syzkaller login: [ 57.736754] BUG: Bad rss-counter state mm:00000000c7486170 type:MM_FILEPAGES val:33 [ 57.737897] BUG: Bad rss-counter state mm:00000000c7486170 type:MM_ANONPAGES val:22 [ 57.908644] ================================================================== [ 57.909721] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 57.910845] Read of size 8 at addr ffff888009477228 by task sshd/220 [ 57.911861] [ 57.912190] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 57.913155] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 57.914094] Call Trace: [ 57.914400] [ 57.914669] dump_stack_lvl+0x91/0xf0 [ 57.915138] print_report+0xcc/0x620 [ 57.915598] ? __virt_addr_valid+0x102/0x340 [ 57.916123] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.916707] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.917293] kasan_report+0xbe/0xf0 [ 57.917750] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.918344] vma_interval_tree_remove+0xc75/0xec0 [ 57.918909] vma_prepare+0xc54/0x11a0 [ 57.919387] __split_vma+0x5af/0x950 [ 57.919864] ? __pfx___split_vma+0x10/0x10 [ 57.920386] ? find_held_lock+0x2c/0x110 [ 57.920898] do_vmi_align_munmap+0x2ba/0x11f0 [ 57.921467] ? lock_is_held_type+0x9f/0x120 [ 57.922014] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 57.922608] ? mtree_range_walk+0x632/0x900 [ 57.923148] ? mas_walk+0x5c7/0x7c0 [ 57.923614] do_vmi_munmap+0x1f1/0x2b0 [ 57.924108] mmap_region+0x1f9/0x2660 [ 57.924591] ? vm_mmap_pgoff+0x15c/0x3a0 [ 57.925091] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 57.925788] ? __pfx_lock_acquire+0x10/0x10 [ 57.926317] ? __pfx_mmap_region+0x10/0x10 [ 57.926823] ? security_mmap_addr+0x7d/0xa0 [ 57.927324] ? get_unmapped_area+0x1f5/0x3f0 [ 57.927852] do_mmap+0x854/0xf00 [ 57.928270] vm_mmap_pgoff+0x1a6/0x3a0 [ 57.928737] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 57.929269] ksys_mmap_pgoff+0x3af/0x500 [ 57.929764] do_syscall_64+0x3f/0x90 [ 57.930216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.930826] RIP: 0033:0x7f7b7cd32d82 [ 57.931255] 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 [ 57.933266] RSP: 002b:00007ffd4bd18678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 57.934131] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7b7cd32d82 [ 57.934932] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7b7c16c000 [ 57.935732] RBP: 00007f7b7c16c000 R08: 0000000000000009 R09: 0000000000001000 [ 57.936532] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c30b6acb20 [ 57.937332] R13: 00007ffd4bd18690 R14: 00007ffd4bd186c0 R15: 00007ffd4bd18a20 [ 57.938146] [ 57.938424] [ 57.938630] Allocated by task 213: [ 57.939039] kasan_save_stack+0x22/0x50 [ 57.939541] kasan_set_track+0x25/0x30 [ 57.940032] __kasan_slab_alloc+0x59/0x70 [ 57.940554] kmem_cache_alloc+0x16b/0x370 [ 57.941069] vm_area_dup+0x20/0x160 [ 57.941512] __split_vma+0x170/0x950 [ 57.941994] split_vma+0xc6/0x110 [ 57.942430] mprotect_fixup+0x8d2/0xb30 [ 57.942922] do_mprotect_pkey+0x87e/0xd40 [ 57.943440] __x64_sys_mprotect+0x78/0xc0 [ 57.943958] do_syscall_64+0x3f/0x90 [ 57.944425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.945059] [ 57.945274] Freed by task 19: [ 57.945671] kasan_save_stack+0x22/0x50 [ 57.946171] kasan_set_track+0x25/0x30 [ 57.946669] kasan_save_free_info+0x2b/0x50 [ 57.947196] __kasan_slab_free+0x10a/0x190 [ 57.947722] kmem_cache_free+0x10d/0x4d0 [ 57.948215] rcu_core+0x8c8/0x2860 [ 57.948659] __do_softirq+0x1b7/0x7d4 [ 57.949133] [ 57.949351] Last potentially related work creation: [ 57.949944] kasan_save_stack+0x22/0x50 [ 57.950449] __kasan_record_aux_stack+0x8e/0xa0 [ 57.951022] __call_rcu_common.constprop.0+0x6a/0xb90 [ 57.951664] remove_vma+0x139/0x170 [ 57.952113] do_vmi_align_munmap+0xd4a/0x11f0 [ 57.952724] do_vmi_munmap+0x1f1/0x2b0 [ 57.953205] __vm_munmap+0x138/0x3a0 [ 57.953674] __x64_sys_munmap+0x59/0x80 [ 57.954162] do_syscall_64+0x3f/0x90 [ 57.954629] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.955265] [ 57.955484] The buggy address belongs to the object at ffff8880094771d0 [ 57.955484] which belongs to the cache vm_area_struct of size 168 [ 57.956939] The buggy address is located 88 bytes inside of [ 57.956939] freed 168-byte region [ffff8880094771d0, ffff888009477278) [ 57.958349] [ 57.958567] The buggy address belongs to the physical page: [ 57.959220] page:00000000eba9c503 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9477 [ 57.960284] memcg:ffff88800e9d0b01 [ 57.960699] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 57.961388] page_type: 0xffffffff() [ 57.961855] raw: 0100000000000200 ffff88800879fc80 ffffea0000268d40 dead000000000007 [ 57.962761] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9d0b01 [ 57.963664] page dumped because: kasan: bad access detected [ 57.964316] [ 57.964528] Memory state around the buggy address: [ 57.965106] ffff888009477100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 57.965949] ffff888009477180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 57.966802] >ffff888009477200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 57.967644] ^ [ 57.968196] ffff888009477280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 57.969049] ffff888009477300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 57.969911] ================================================================== [ 57.970831] Disabling lock debugging due to kernel taint [ 60.020438] BUG: Bad rss-counter state mm:0000000055c9bc23 type:MM_FILEPAGES val:33 [ 60.021065] BUG: Bad rss-counter state mm:0000000055c9bc23 type:MM_ANONPAGES val:22 [ 60.409193] BUG: Bad rss-counter state mm:00000000b2b9ecd9 type:MM_FILEPAGES val:33 [ 60.410184] BUG: Bad rss-counter state mm:00000000b2b9ecd9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64106' (ECDSA) to the list of known hosts. 2023/06/20 01:19:30 fuzzer started 2023/06/20 01:19:30 dialing manager at localhost:44161 2023/06/20 01:19:30 checking machine... 2023/06/20 01:19:30 checking revisions... [ 61.099062] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:19:30 testing simple program... [ 61.153835] cgroup: Unknown subsys name 'net' [ 61.193859] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:19:03 Registers: info registers vcpu 0 RAX=00000016d7940434 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000016 RSI=ffff88806ce28140 RDI=0000000000053b5c RBP=ffff88806ce28140 RSP=ffff88806ce09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000ef9f1 R11=0000000000000001 R12=0000000000053b5c R13=0000000000000000 R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff811062a5 RFL=00000013 [----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 00007eff4a981900 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=00007eff49e02010 CR3=000000000c584000 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=28c43943834dd6a8b146faf37ca117f6 XMM02=0000000000127760d59e07bde36eea69 XMM03=0000000000127888ec2efd57dc4c00df XMM04=1db2defb6813e15700000000000ae988 XMM05=0ab54e163e2e2db7000000000013f090 XMM06=19e9129bd510f235000000000013df28 XMM07=fb795ef6d6577056000000000012e590 XMM08=2c67c8bc2e329bc30000000000127888 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888015c6e980 RBX=ffff8880164651c0 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff888018497d90 RSP=ffff888018497d08 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=0000000000000000 R13=0000000000000009 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff818260cd RFL=00000202 [-------] 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 00007f79f1058900 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=00007ffd6b2f5000 CR3=0000000008ed0000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000