syzkaller login: [ 38.723153] BUG: Bad rss-counter state mm:0000000058b20985 type:MM_FILEPAGES val:33 [ 38.724557] BUG: Bad rss-counter state mm:0000000058b20985 type:MM_ANONPAGES val:22 [ 38.884042] ================================================================== [ 38.885369] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.886828] Read of size 8 at addr ffff888016b655c8 by task sshd/220 [ 38.887868] [ 38.888126] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.889192] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.890391] Call Trace: [ 38.890791] [ 38.891128] dump_stack_lvl+0x91/0xf0 [ 38.891719] print_report+0xcc/0x620 [ 38.892306] ? __virt_addr_valid+0x102/0x340 [ 38.892984] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.893735] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.894492] kasan_report+0xbe/0xf0 [ 38.895090] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.895852] vma_interval_tree_remove+0xc75/0xec0 [ 38.896592] vma_prepare+0xc54/0x11a0 [ 38.897170] __split_vma+0x5af/0x950 [ 38.897740] ? __pfx___split_vma+0x10/0x10 [ 38.898377] ? find_held_lock+0x2c/0x110 [ 38.899015] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.899702] ? lock_is_held_type+0x9f/0x120 [ 38.900354] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.901094] ? mtree_range_walk+0x632/0x900 [ 38.901763] ? mas_walk+0x5c7/0x7c0 [ 38.902327] do_vmi_munmap+0x1f1/0x2b0 [ 38.902952] mmap_region+0x1f9/0x2660 [ 38.903536] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.904157] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.904928] ? __pfx_lock_acquire+0x10/0x10 [ 38.905430] ? __pfx_mmap_region+0x10/0x10 [ 38.905949] ? security_mmap_addr+0x7d/0xa0 [ 38.906486] ? get_unmapped_area+0x1f5/0x3f0 [ 38.907039] do_mmap+0x854/0xf00 [ 38.907480] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.908026] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.908639] ksys_mmap_pgoff+0x3af/0x500 [ 38.909197] do_syscall_64+0x3f/0x90 [ 38.909718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.910427] RIP: 0033:0x7fe66fcf7d82 [ 38.910949] 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 [ 38.913295] RSP: 002b:00007ffe9f935378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.914280] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe66fcf7d82 [ 38.915228] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe66f131000 [ 38.916148] RBP: 00007fe66f131000 R08: 0000000000000009 R09: 0000000000001000 [ 38.917080] R10: 0000000000000812 R11: 0000000000000206 R12: 000056298586dec0 [ 38.918007] R13: 00007ffe9f935390 R14: 00007ffe9f9353c0 R15: 00007ffe9f935720 [ 38.918947] [ 38.919256] [ 38.919482] Allocated by task 213: [ 38.919908] kasan_save_stack+0x22/0x50 [ 38.920411] kasan_set_track+0x25/0x30 [ 38.920905] __kasan_slab_alloc+0x59/0x70 [ 38.921429] kmem_cache_alloc+0x16b/0x370 [ 38.921949] vm_area_dup+0x20/0x160 [ 38.922403] __split_vma+0x170/0x950 [ 38.922890] split_vma+0xc6/0x110 [ 38.923332] mprotect_fixup+0x8d2/0xb30 [ 38.923829] do_mprotect_pkey+0x87e/0xd40 [ 38.924346] __x64_sys_mprotect+0x78/0xc0 [ 38.924868] do_syscall_64+0x3f/0x90 [ 38.925342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.925985] [ 38.926202] Freed by task 213: [ 38.926595] kasan_save_stack+0x22/0x50 [ 38.927118] kasan_set_track+0x25/0x30 [ 38.927610] kasan_save_free_info+0x2b/0x50 [ 38.928143] __kasan_slab_free+0x10a/0x190 [ 38.928684] kmem_cache_free+0x10d/0x4d0 [ 38.929199] rcu_core+0x8c8/0x2860 [ 38.929649] __do_softirq+0x1b7/0x7d4 [ 38.930168] [ 38.930403] Last potentially related work creation: [ 38.931064] kasan_save_stack+0x22/0x50 [ 38.931608] __kasan_record_aux_stack+0x8e/0xa0 [ 38.932225] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.932904] remove_vma+0x139/0x170 [ 38.933370] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.933968] do_vmi_munmap+0x1f1/0x2b0 [ 38.934498] __vm_munmap+0x138/0x3a0 [ 38.935013] __x64_sys_munmap+0x59/0x80 [ 38.935542] do_syscall_64+0x3f/0x90 [ 38.936060] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.936760] [ 38.936983] Second to last potentially related work creation: [ 38.937712] kasan_save_stack+0x22/0x50 [ 38.938258] __kasan_record_aux_stack+0x8e/0xa0 [ 38.938890] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.939576] remove_vma+0x139/0x170 [ 38.940075] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.940671] do_vmi_munmap+0x1f1/0x2b0 [ 38.941202] mmap_region+0x1f9/0x2660 [ 38.941719] do_mmap+0x854/0xf00 [ 38.942183] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.942727] ksys_mmap_pgoff+0x3af/0x500 [ 38.943256] do_syscall_64+0x3f/0x90 [ 38.943754] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.944419] [ 38.944644] The buggy address belongs to the object at ffff888016b65570 [ 38.944644] which belongs to the cache vm_area_struct of size 168 [ 38.946238] The buggy address is located 88 bytes inside of [ 38.946238] freed 168-byte region [ffff888016b65570, ffff888016b65618) [ 38.947770] [ 38.948007] The buggy address belongs to the physical page: [ 38.948726] page:0000000039247dd4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b65 [ 38.949900] memcg:ffff888016ff6501 [ 38.950367] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.951148] page_type: 0xffffffff() [ 38.951630] raw: 0100000000000200 ffff8880087a0c80 ffffea00003f5940 0000000000000009 [ 38.952621] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ff6501 [ 38.953613] page dumped because: kasan: bad access detected [ 38.954329] [ 38.954561] Memory state around the buggy address: [ 38.955218] ffff888016b65480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.956135] ffff888016b65500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 38.957064] >ffff888016b65580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.957986] ^ [ 38.958709] ffff888016b65600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.959636] ffff888016b65680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.960572] ================================================================== [ 38.961640] Disabling lock debugging due to kernel taint [ 41.393857] BUG: Bad rss-counter state mm:00000000979bd866 type:MM_FILEPAGES val:33 [ 41.394627] BUG: Bad rss-counter state mm:00000000979bd866 type:MM_ANONPAGES val:22 [ 41.817845] BUG: Bad rss-counter state mm:0000000033a37b17 type:MM_FILEPAGES val:33 [ 41.818612] BUG: Bad rss-counter state mm:0000000033a37b17 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57304' (ECDSA) to the list of known hosts. 2023/06/20 11:47:12 fuzzer started 2023/06/20 11:47:12 dialing manager at localhost:36067 2023/06/20 11:47:12 checking machine... 2023/06/20 11:47:12 checking revisions... [ 42.558231] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:47:13 testing simple program... [ 42.610180] cgroup: Unknown subsys name 'net' [ 42.646401] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:47:12 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f3004cd79e0 CR3=000000000c5d8000 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=13c995259113bb96fb46bb816124a3a9 XMM02=000000000011a820eff9b2d0a8fce9cb XMM03=000000000011a8f02c67c8bc2e329bc3 XMM04=d7a4f92d152e72c600000000000ae988 XMM05=e4cb8bb95a7664b60000000000132b68 XMM06=c291bd5c70af25b900000000001329f0 XMM07=e042d86d42eb936e00000000001214d0 XMM08=a4c0d867c4e00886000000000011a8f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000007 RCX=ffffffff8113b066 RDX=ffff88800dc79b40 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff88800dbbc570 RSP=ffff88801a12fe90 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000002 R11=0000000000000000 R12=0000000000000002 R13=0000000000100073 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff814c0860 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8c359ac900 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=00007f8c3611e3ec CR3=000000000e5e8000 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=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