syzkaller login: [ 38.749025] BUG: Bad rss-counter state mm:0000000005c95077 type:MM_FILEPAGES val:33 [ 38.749707] BUG: Bad rss-counter state mm:0000000005c95077 type:MM_ANONPAGES val:22 [ 38.926459] ================================================================== [ 38.927618] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.928789] Read of size 8 at addr ffff88801679fed8 by task sshd/220 [ 38.929652] [ 38.929898] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.930909] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.932018] Call Trace: [ 38.932370] [ 38.932648] dump_stack_lvl+0x91/0xf0 [ 38.933140] print_report+0xcc/0x620 [ 38.933626] ? __virt_addr_valid+0x102/0x340 [ 38.934177] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.934812] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.935427] kasan_report+0xbe/0xf0 [ 38.935909] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.936521] vma_interval_tree_remove+0xc75/0xec0 [ 38.937120] vma_prepare+0xc54/0x11a0 [ 38.937595] __split_vma+0x5af/0x950 [ 38.938066] ? __pfx___split_vma+0x10/0x10 [ 38.938598] ? find_held_lock+0x2c/0x110 [ 38.939110] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.939667] ? lock_is_held_type+0x9f/0x120 [ 38.940200] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.940808] ? mtree_range_walk+0x632/0x900 [ 38.941363] ? mas_walk+0x5c7/0x7c0 [ 38.941838] do_vmi_munmap+0x1f1/0x2b0 [ 38.942342] mmap_region+0x1f9/0x2660 [ 38.942816] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.943323] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.944029] ? __pfx_lock_acquire+0x10/0x10 [ 38.944559] ? __pfx_mmap_region+0x10/0x10 [ 38.945083] ? security_mmap_addr+0x7d/0xa0 [ 38.945605] ? get_unmapped_area+0x1f5/0x3f0 [ 38.946151] do_mmap+0x854/0xf00 [ 38.946615] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.947101] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.947655] ksys_mmap_pgoff+0x3af/0x500 [ 38.948166] do_syscall_64+0x3f/0x90 [ 38.948642] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.949280] RIP: 0033:0x7fcd327c1d82 [ 38.949743] 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 [ 38.951858] RSP: 002b:00007ffcd8cc7728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.952749] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcd327c1d82 [ 38.953607] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcd31bfb000 [ 38.954458] RBP: 00007fcd31bfb000 R08: 0000000000000009 R09: 0000000000001000 [ 38.955297] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c021578d90 [ 38.956169] R13: 00007ffcd8cc7740 R14: 00007ffcd8cc7770 R15: 00007ffcd8cc7ad0 [ 38.957020] [ 38.957313] [ 38.957527] Allocated by task 213: [ 38.957961] kasan_save_stack+0x22/0x50 [ 38.958491] kasan_set_track+0x25/0x30 [ 38.958986] __kasan_slab_alloc+0x59/0x70 [ 38.959507] kmem_cache_alloc+0x16b/0x370 [ 38.960020] vm_area_dup+0x20/0x160 [ 38.960493] __split_vma+0x170/0x950 [ 38.960967] split_vma+0xc6/0x110 [ 38.961409] mprotect_fixup+0x8d2/0xb30 [ 38.961907] do_mprotect_pkey+0x87e/0xd40 [ 38.962440] __x64_sys_mprotect+0x78/0xc0 [ 38.962976] do_syscall_64+0x3f/0x90 [ 38.963447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.964086] [ 38.964306] Freed by task 213: [ 38.964702] kasan_save_stack+0x22/0x50 [ 38.965216] kasan_set_track+0x25/0x30 [ 38.965700] kasan_save_free_info+0x2b/0x50 [ 38.966226] __kasan_slab_free+0x10a/0x190 [ 38.966775] kmem_cache_free+0x10d/0x4d0 [ 38.967277] rcu_core+0x8c8/0x2860 [ 38.967717] __do_softirq+0x1b7/0x7d4 [ 38.968188] [ 38.968405] Last potentially related work creation: [ 38.968991] kasan_save_stack+0x22/0x50 [ 38.969498] __kasan_record_aux_stack+0x8e/0xa0 [ 38.970068] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.970711] remove_vma+0x139/0x170 [ 38.971158] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.971710] do_vmi_munmap+0x1f1/0x2b0 [ 38.972189] __vm_munmap+0x138/0x3a0 [ 38.972651] __x64_sys_munmap+0x59/0x80 [ 38.973145] do_syscall_64+0x3f/0x90 [ 38.973618] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.974260] [ 38.974482] Second to last potentially related work creation: [ 38.975168] kasan_save_stack+0x22/0x50 [ 38.975672] __kasan_record_aux_stack+0x8e/0xa0 [ 38.976241] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.976883] remove_vma+0x139/0x170 [ 38.977340] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.977903] do_vmi_munmap+0x1f1/0x2b0 [ 38.978404] mmap_region+0x1f9/0x2660 [ 38.978877] do_mmap+0x854/0xf00 [ 38.979299] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.979781] ksys_mmap_pgoff+0x3af/0x500 [ 38.980280] do_syscall_64+0x3f/0x90 [ 38.980750] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.981390] [ 38.981603] The buggy address belongs to the object at ffff88801679fe80 [ 38.981603] which belongs to the cache vm_area_struct of size 168 [ 38.983059] The buggy address is located 88 bytes inside of [ 38.983059] freed 168-byte region [ffff88801679fe80, ffff88801679ff28) [ 38.984444] [ 38.984659] The buggy address belongs to the physical page: [ 38.985311] page:00000000d3e570ab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1679f [ 38.986419] memcg:ffff8880167fda01 [ 38.986845] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.987492] page_type: 0xffffffff() [ 38.987936] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.988851] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880167fda01 [ 38.989747] page dumped because: kasan: bad access detected [ 38.990409] [ 38.990625] Memory state around the buggy address: [ 38.991199] ffff88801679fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.992045] ffff88801679fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.992888] >ffff88801679fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.993733] ^ [ 38.994471] ffff88801679ff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.995321] ffff88801679ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.996163] ================================================================== [ 38.997237] Disabling lock debugging due to kernel taint [ 40.507732] BUG: Bad rss-counter state mm:00000000b39e685e type:MM_FILEPAGES val:33 [ 40.508758] BUG: Bad rss-counter state mm:00000000b39e685e type:MM_ANONPAGES val:22 [ 40.950048] BUG: Bad rss-counter state mm:000000003ff0f3b7 type:MM_FILEPAGES val:33 [ 40.952673] BUG: Bad rss-counter state mm:000000003ff0f3b7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62936' (ECDSA) to the list of known hosts. 2023/06/21 04:34:22 fuzzer started 2023/06/21 04:34:22 dialing manager at localhost:36067 2023/06/21 04:34:22 checking machine... 2023/06/21 04:34:22 checking revisions... [ 41.738905] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:34:22 testing simple program... [ 41.785015] cgroup: Unknown subsys name 'net' [ 41.858158] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:34:22 Registers: info registers vcpu 0 RAX=0000000000000058 RBX=ffff88800ba08000 RCX=0000000000000000 RDX=0000000000010177 RSI=ffffffff8219168b RDI=0000000000000007 RBP=ffff88800ba080b8 RSP=ffff88800b827c80 R8 =0000000000000007 R9 =0000000000010000 R10=0000000000010177 R11=0000000000000000 R12=0000000000010177 R13=ffff88800ba08000 R14=ffffed1001741001 R15=ffffffff85a23960 RIP=ffffffff8219168f RFL=00000093 [--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 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=00007f015e7ee028 CR3=000000000f4fe000 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=dcfdb3cd60609e941b4e6a501a68dc93 XMM02=000000000011af78d59e07bde36eea69 XMM03=000000000011b0a0ec2efd57dc4c00df XMM04=1af8945b772c618800000000000ae988 XMM05=2987ed5650e528910000000000133db0 XMM06=4fda316b135da52b0000000000132830 XMM07=fb795ef6d65770560000000000121a40 XMM08=2c67c8bc2e329bc3000000000011b0a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080010002 RBX=ffff88800ba08238 RCX=0000000000000000 RDX=0000000000010172 RSI=ffffffff8219168b RDI=0000000000000007 RBP=ffffffff85a23960 RSP=ffff88806cf09c88 R8 =0000000000000007 R9 =0000000000010000 R10=0000000000010172 R11=ffff88806cf09ff8 R12=0000000000010172 R13=0000000000000058 R14=ffff88800ba08050 R15=ffff88800ba08040 RIP=ffffffff8219168f 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 00007fde70253900 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=00007fde7080a618 CR3=000000000ebca000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000