syzkaller login: [ 30.250059] BUG: Bad rss-counter state mm:0000000001c4d55b type:MM_FILEPAGES val:33 [ 30.251282] BUG: Bad rss-counter state mm:0000000001c4d55b type:MM_ANONPAGES val:22 [ 30.417994] ================================================================== [ 30.419096] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.420323] Read of size 8 at addr ffff888016661798 by task sshd/220 [ 30.421225] [ 30.421476] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.422503] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.423646] Call Trace: [ 30.424021] [ 30.424364] dump_stack_lvl+0x91/0xf0 [ 30.424943] print_report+0xcc/0x620 [ 30.425509] ? __virt_addr_valid+0x102/0x340 [ 30.426156] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.426895] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.427616] kasan_report+0xbe/0xf0 [ 30.428192] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.428922] vma_interval_tree_remove+0xc75/0xec0 [ 30.429621] vma_prepare+0xc54/0x11a0 [ 30.430185] __split_vma+0x5af/0x950 [ 30.430739] ? __pfx___split_vma+0x10/0x10 [ 30.431362] ? find_held_lock+0x2c/0x110 [ 30.431982] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.432660] ? lock_is_held_type+0x9f/0x120 [ 30.433295] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.434008] ? mtree_range_walk+0x632/0x900 [ 30.434660] ? mas_walk+0x5c7/0x7c0 [ 30.435214] do_vmi_munmap+0x1f1/0x2b0 [ 30.435782] mmap_region+0x1f9/0x2660 [ 30.436337] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.436916] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.437721] ? __pfx_lock_acquire+0x10/0x10 [ 30.438324] ? __pfx_mmap_region+0x10/0x10 [ 30.438925] ? security_mmap_addr+0x7d/0xa0 [ 30.439522] ? get_unmapped_area+0x1f5/0x3f0 [ 30.440168] do_mmap+0x854/0xf00 [ 30.440667] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.441225] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.441865] ksys_mmap_pgoff+0x3af/0x500 [ 30.442434] do_syscall_64+0x3f/0x90 [ 30.442976] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.443701] RIP: 0033:0x7eff08eadd82 [ 30.444228] 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 [ 30.446660] RSP: 002b:00007ffcdcb84768 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.447713] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007eff08eadd82 [ 30.448705] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007eff082e7000 [ 30.449684] RBP: 00007eff082e7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.450665] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ff6ec0af70 [ 30.451637] R13: 00007ffcdcb84780 R14: 00007ffcdcb847b0 R15: 00007ffcdcb84b10 [ 30.452645] [ 30.452981] [ 30.453233] Allocated by task 213: [ 30.453712] kasan_save_stack+0x22/0x50 [ 30.454272] kasan_set_track+0x25/0x30 [ 30.454821] __kasan_slab_alloc+0x59/0x70 [ 30.455405] kmem_cache_alloc+0x16b/0x370 [ 30.455977] vm_area_dup+0x20/0x160 [ 30.456496] __split_vma+0x170/0x950 [ 30.457019] split_vma+0xc6/0x110 [ 30.457513] mprotect_fixup+0x8d2/0xb30 [ 30.458075] do_mprotect_pkey+0x87e/0xd40 [ 30.458655] __x64_sys_mprotect+0x78/0xc0 [ 30.459239] do_syscall_64+0x3f/0x90 [ 30.459767] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.460500] [ 30.460741] Freed by task 213: [ 30.461180] kasan_save_stack+0x22/0x50 [ 30.461770] kasan_set_track+0x25/0x30 [ 30.462328] kasan_save_free_info+0x2b/0x50 [ 30.462936] __kasan_slab_free+0x10a/0x190 [ 30.463529] kmem_cache_free+0x10d/0x4d0 [ 30.464098] rcu_core+0x8c8/0x2860 [ 30.464603] __do_softirq+0x1b7/0x7d4 [ 30.465137] [ 30.465377] Last potentially related work creation: [ 30.466030] kasan_save_stack+0x22/0x50 [ 30.466589] __kasan_record_aux_stack+0x8e/0xa0 [ 30.467237] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.467962] remove_vma+0x139/0x170 [ 30.468485] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.469101] do_vmi_munmap+0x1f1/0x2b0 [ 30.469640] __vm_munmap+0x138/0x3a0 [ 30.470166] __x64_sys_munmap+0x59/0x80 [ 30.470717] do_syscall_64+0x3f/0x90 [ 30.471255] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.471995] [ 30.472250] The buggy address belongs to the object at ffff888016661740 [ 30.472250] which belongs to the cache vm_area_struct of size 168 [ 30.473927] The buggy address is located 88 bytes inside of [ 30.473927] freed 168-byte region [ffff888016661740, ffff8880166617e8) [ 30.475502] [ 30.475751] The buggy address belongs to the physical page: [ 30.476496] page:00000000def1d455 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16661 [ 30.477723] memcg:ffff88800fe9bf01 [ 30.478206] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.478940] page_type: 0xffffffff() [ 30.479446] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.480509] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe9bf01 [ 30.481524] page dumped because: kasan: bad access detected [ 30.482265] [ 30.482510] Memory state around the buggy address: [ 30.483164] ffff888016661680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.484136] ffff888016661700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.485111] >ffff888016661780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.486072] ^ [ 30.486634] ffff888016661800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.487599] ffff888016661880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.488580] ================================================================== [ 30.489775] Disabling lock debugging due to kernel taint [ 32.479868] BUG: Bad rss-counter state mm:00000000ea655836 type:MM_FILEPAGES val:33 [ 32.480745] BUG: Bad rss-counter state mm:00000000ea655836 type:MM_ANONPAGES val:22 [ 32.867067] BUG: Bad rss-counter state mm:0000000031bbd60f type:MM_FILEPAGES val:33 [ 32.867975] BUG: Bad rss-counter state mm:0000000031bbd60f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27049' (ECDSA) to the list of known hosts. 2023/06/21 09:24:07 fuzzer started 2023/06/21 09:24:07 dialing manager at localhost:36067 2023/06/21 09:24:07 checking machine... 2023/06/21 09:24:07 checking revisions... [ 33.519460] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:24:07 testing simple program... [ 33.565089] cgroup: Unknown subsys name 'net' [ 33.697251] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:24:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f489e424c64 RCX=ffffffff81007b62 RDX=ffff888016b1d1c0 RSI=0000000000000001 RDI=0000000000000002 RBP=0000000000000001 RSP=ffff88800d5f7330 R8 =ffffffff864bbb58 R9 =ffff88800d5f73f0 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88800d5f7478 R13=0000000000000000 R14=ffff888016b1d1c0 R15=ffff88800fde7390 RIP=ffffffff814c0408 RFL=00000293 [--S-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 00007f489db6b900 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=00007f0b3a34e650 CR3=000000000ea92000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=1001bfc29303155b00000000000ae988 XMM05=c0d9ca36887662ec0000000000134488 XMM06=19e9129bd510f2350000000000132fd0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffd0eedcee8 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=00007f50202e7510000055c28d21a790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000