syzkaller login: [ 36.374509] BUG: Bad rss-counter state mm:00000000820f5ae7 type:MM_FILEPAGES val:33 [ 36.375787] BUG: Bad rss-counter state mm:00000000820f5ae7 type:MM_ANONPAGES val:22 [ 36.548346] ================================================================== [ 36.549314] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.550352] Read of size 8 at addr ffff88801031b6b0 by task sshd/221 [ 36.551216] [ 36.551535] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.552470] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.553503] Call Trace: [ 36.553853] [ 36.554158] dump_stack_lvl+0x91/0xf0 [ 36.554682] print_report+0xcc/0x620 [ 36.555194] ? __virt_addr_valid+0x102/0x340 [ 36.555783] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.556446] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.557099] kasan_report+0xbe/0xf0 [ 36.557619] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.558294] vma_interval_tree_remove+0xc75/0xec0 [ 36.558947] vma_prepare+0xc54/0x11a0 [ 36.559466] __split_vma+0x5af/0x950 [ 36.559976] ? __pfx___split_vma+0x10/0x10 [ 36.560549] ? find_held_lock+0x2c/0x110 [ 36.561116] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.561728] ? lock_is_held_type+0x9f/0x120 [ 36.562306] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.562964] ? mtree_range_walk+0x632/0x900 [ 36.563563] ? mas_walk+0x5c7/0x7c0 [ 36.564079] do_vmi_munmap+0x1f1/0x2b0 [ 36.564631] mmap_region+0x1f9/0x2660 [ 36.565152] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.565704] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.566470] ? __pfx_lock_acquire+0x10/0x10 [ 36.567045] ? __pfx_mmap_region+0x10/0x10 [ 36.567620] ? security_mmap_addr+0x7d/0xa0 [ 36.568194] ? get_unmapped_area+0x1f5/0x3f0 [ 36.568800] do_mmap+0x854/0xf00 [ 36.569279] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.569817] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.570429] ksys_mmap_pgoff+0x3af/0x500 [ 36.570977] do_syscall_64+0x3f/0x90 [ 36.571495] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.572210] RIP: 0033:0x7f23f2344d82 [ 36.572708] 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 [ 36.574991] RSP: 002b:00007fff9c657688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.575964] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f23f2344d82 [ 36.576882] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f23f177e000 [ 36.577803] RBP: 00007f23f177e000 R08: 0000000000000009 R09: 0000000000001000 [ 36.578724] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e3ac3a3b20 [ 36.579644] R13: 00007fff9c6576a0 R14: 00007fff9c6576d0 R15: 00007fff9c657a30 [ 36.580589] [ 36.580907] [ 36.581137] Allocated by task 214: [ 36.581599] kasan_save_stack+0x22/0x50 [ 36.582150] kasan_set_track+0x25/0x30 [ 36.582673] __kasan_slab_alloc+0x59/0x70 [ 36.583230] kmem_cache_alloc+0x16b/0x370 [ 36.583784] vm_area_dup+0x20/0x160 [ 36.584277] __split_vma+0x170/0x950 [ 36.584771] split_vma+0xc6/0x110 [ 36.585239] mprotect_fixup+0x8d2/0xb30 [ 36.585780] do_mprotect_pkey+0x87e/0xd40 [ 36.586336] __x64_sys_mprotect+0x78/0xc0 [ 36.586899] do_syscall_64+0x3f/0x90 [ 36.587405] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.588092] [ 36.588344] Freed by task 214: [ 36.588759] kasan_save_stack+0x22/0x50 [ 36.589303] kasan_set_track+0x25/0x30 [ 36.589831] kasan_save_free_info+0x2b/0x50 [ 36.590400] __kasan_slab_free+0x10a/0x190 [ 36.590979] kmem_cache_free+0x10d/0x4d0 [ 36.591530] rcu_core+0x8c8/0x2860 [ 36.592006] __do_softirq+0x1b7/0x7d4 [ 36.592630] [ 36.592865] Last potentially related work creation: [ 36.593492] kasan_save_stack+0x22/0x50 [ 36.594035] __kasan_record_aux_stack+0x8e/0xa0 [ 36.594655] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.595348] remove_vma+0x139/0x170 [ 36.595840] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.596457] do_vmi_munmap+0x1f1/0x2b0 [ 36.596970] __vm_munmap+0x138/0x3a0 [ 36.597479] __x64_sys_munmap+0x59/0x80 [ 36.598014] do_syscall_64+0x3f/0x90 [ 36.598526] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.599218] [ 36.599447] The buggy address belongs to the object at ffff88801031b658 [ 36.599447] which belongs to the cache vm_area_struct of size 168 [ 36.601028] The buggy address is located 88 bytes inside of [ 36.601028] freed 168-byte region [ffff88801031b658, ffff88801031b700) [ 36.602545] [ 36.602779] The buggy address belongs to the physical page: [ 36.603473] page:00000000e1f98d72 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1031b [ 36.604646] memcg:ffff8880171d6201 [ 36.605092] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.605788] page_type: 0xffffffff() [ 36.606276] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.607270] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880171d6201 [ 36.608267] page dumped because: kasan: bad access detected [ 36.608963] [ 36.609192] Memory state around the buggy address: [ 36.609811] ffff88801031b580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.610711] ffff88801031b600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 36.611632] >ffff88801031b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.612544] ^ [ 36.613177] ffff88801031b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 36.614101] ffff88801031b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 36.615016] ================================================================== [ 36.616138] Disabling lock debugging due to kernel taint [ 38.693501] BUG: Bad rss-counter state mm:000000006228b17e type:MM_FILEPAGES val:33 [ 38.694731] BUG: Bad rss-counter state mm:000000006228b17e type:MM_ANONPAGES val:22 [ 39.156097] BUG: Bad rss-counter state mm:00000000f3730ddf type:MM_FILEPAGES val:33 [ 39.157404] BUG: Bad rss-counter state mm:00000000f3730ddf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65054' (ECDSA) to the list of known hosts. 2023/06/20 02:20:52 fuzzer started 2023/06/20 02:20:52 dialing manager at localhost:44161 2023/06/20 02:20:52 checking machine... 2023/06/20 02:20:52 checking revisions... [ 39.801743] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:20:52 testing simple program... [ 39.847187] cgroup: Unknown subsys name 'net' [ 39.885195] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:20:46 Registers: info registers vcpu 0 RAX=ffff888010435788 RBX=ffff88800b81bb18 RCX=1ffff1100170376a RDX=dffffc0000000000 RSI=ffff88800e931ef0 RDI=ffff88800b81bb50 RBP=ffff88800b81bb20 RSP=ffff888019e97c08 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800e931ee0 R13=0000000000000000 R14=ffff88800e37c898 R15=ffff88800e37c850 RIP=ffffffff8184754c 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 00007f9c40535900 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=00007ffddd7ce000 CR3=000000000e3a8000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ff5e23c5c10 CR3=000000000e9fa000 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=0d7d0a00c5440ea5e6476f3a181b2faf XMM02=000000000011ced8ec2efd57dc4c00df XMM03=00000000001243407a5e36d0fa3cb6ce XMM04=bf8db64cc9a593de00000000000ae988 XMM05=0f0bcdd8d772a9c40000000000134c80 XMM06=c291bd5c70af25b90000000000133d20 XMM07=e042d86d42eb936e00000000001245c0 XMM08=7a5e36d0fa3cb6ce000000000011cf38 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000