syzkaller login: [ 31.233357] BUG: Bad rss-counter state mm:000000002818efa4 type:MM_FILEPAGES val:33 [ 31.234674] BUG: Bad rss-counter state mm:000000002818efa4 type:MM_ANONPAGES val:22 [ 31.402173] ================================================================== [ 31.403185] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.404135] Read of size 8 at addr ffff88800961e798 by task sshd/223 [ 31.405024] [ 31.405253] CPU: 0 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.406166] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.407172] Call Trace: [ 31.407503] [ 31.407787] dump_stack_lvl+0x91/0xf0 [ 31.408281] print_report+0xcc/0x620 [ 31.408763] ? __virt_addr_valid+0x102/0x340 [ 31.409315] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.409977] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.410611] kasan_report+0xbe/0xf0 [ 31.411106] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.411736] vma_interval_tree_remove+0xc75/0xec0 [ 31.412356] vma_prepare+0xc54/0x11a0 [ 31.412869] __split_vma+0x5af/0x950 [ 31.413341] ? __pfx___split_vma+0x10/0x10 [ 31.413873] ? find_held_lock+0x2c/0x110 [ 31.414412] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.414994] ? lock_is_held_type+0x9f/0x120 [ 31.415533] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.416158] ? mtree_range_walk+0x632/0x900 [ 31.416719] ? mas_walk+0x5c7/0x7c0 [ 31.417206] do_vmi_munmap+0x1f1/0x2b0 [ 31.417720] mmap_region+0x1f9/0x2660 [ 31.418230] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.418755] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.419482] ? __pfx_lock_acquire+0x10/0x10 [ 31.420032] ? __pfx_mmap_region+0x10/0x10 [ 31.420568] ? security_mmap_addr+0x7d/0xa0 [ 31.421109] ? get_unmapped_area+0x1f5/0x3f0 [ 31.421681] do_mmap+0x854/0xf00 [ 31.422150] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.422659] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.423243] ksys_mmap_pgoff+0x3af/0x500 [ 31.423760] do_syscall_64+0x3f/0x90 [ 31.424239] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.424898] RIP: 0033:0x7f1f67023d82 [ 31.425359] 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 [ 31.427524] RSP: 002b:00007ffe2852be08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.428445] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1f67023d82 [ 31.429299] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1f6645d000 [ 31.430165] RBP: 00007f1f6645d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.431024] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558efee86ec0 [ 31.431888] R13: 00007ffe2852be20 R14: 00007ffe2852be50 R15: 00007ffe2852c1b0 [ 31.432739] [ 31.433041] [ 31.433256] Allocated by task 213: [ 31.433689] kasan_save_stack+0x22/0x50 [ 31.434201] kasan_set_track+0x25/0x30 [ 31.434695] __kasan_slab_alloc+0x59/0x70 [ 31.435224] kmem_cache_alloc+0x16b/0x370 [ 31.435745] vm_area_dup+0x20/0x160 [ 31.436203] __split_vma+0x170/0x950 [ 31.436667] split_vma+0xc6/0x110 [ 31.437107] mprotect_fixup+0x8d2/0xb30 [ 31.437621] do_mprotect_pkey+0x87e/0xd40 [ 31.438164] __x64_sys_mprotect+0x78/0xc0 [ 31.438687] do_syscall_64+0x3f/0x90 [ 31.439165] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.439808] [ 31.440024] Freed by task 203: [ 31.440418] kasan_save_stack+0x22/0x50 [ 31.440923] kasan_set_track+0x25/0x30 [ 31.441420] kasan_save_free_info+0x2b/0x50 [ 31.441981] __kasan_slab_free+0x10a/0x190 [ 31.442519] kmem_cache_free+0x10d/0x4d0 [ 31.443035] rcu_core+0x8c8/0x2860 [ 31.443488] __do_softirq+0x1b7/0x7d4 [ 31.443972] [ 31.444189] Last potentially related work creation: [ 31.444775] kasan_save_stack+0x22/0x50 [ 31.445282] __kasan_record_aux_stack+0x8e/0xa0 [ 31.445860] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.446529] remove_vma+0x139/0x170 [ 31.446981] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.447539] do_vmi_munmap+0x1f1/0x2b0 [ 31.448040] __vm_munmap+0x138/0x3a0 [ 31.448513] __x64_sys_munmap+0x59/0x80 [ 31.449006] do_syscall_64+0x3f/0x90 [ 31.449483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.450138] [ 31.450350] The buggy address belongs to the object at ffff88800961e740 [ 31.450350] which belongs to the cache vm_area_struct of size 168 [ 31.451812] The buggy address is located 88 bytes inside of [ 31.451812] freed 168-byte region [ffff88800961e740, ffff88800961e7e8) [ 31.453213] [ 31.453426] The buggy address belongs to the physical page: [ 31.454092] page:0000000051489c09 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x961e [ 31.455210] memcg:ffff88800da13001 [ 31.455649] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.456317] page_type: 0xffffffff() [ 31.456763] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.457709] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da13001 [ 31.458659] page dumped because: kasan: bad access detected [ 31.459321] [ 31.459536] Memory state around the buggy address: [ 31.460124] ffff88800961e680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.460990] ffff88800961e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.461863] >ffff88800961e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.462726] ^ [ 31.463237] ffff88800961e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.464132] ffff88800961e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.464980] ================================================================== [ 31.465976] Disabling lock debugging due to kernel taint [ 33.885836] BUG: Bad rss-counter state mm:000000006a8929f8 type:MM_FILEPAGES val:33 [ 33.887265] BUG: Bad rss-counter state mm:000000006a8929f8 type:MM_ANONPAGES val:22 [ 34.458491] BUG: Bad rss-counter state mm:0000000061a80200 type:MM_FILEPAGES val:33 [ 34.459658] BUG: Bad rss-counter state mm:0000000061a80200 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48822' (ECDSA) to the list of known hosts. 2023/06/20 15:22:55 fuzzer started 2023/06/20 15:22:55 dialing manager at localhost:36067 2023/06/20 15:22:55 checking machine... 2023/06/20 15:22:55 checking revisions... [ 35.144132] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:22:55 testing simple program... [ 35.192242] cgroup: Unknown subsys name 'net' [ 35.238420] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:22:55 Registers: info registers vcpu 0 RAX=0000000080000101 RBX=00007fa90320c477 RCX=0000000080000101 RDX=1ffff1100d9c135e RSI=ffffffff81007b50 RDI=00007fa90320c477 RBP=00007fa90320c477 RSP=ffff88806ce09a18 R8 =ffffffff864bbb58 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff8880146f3680 R15=ffff88800e934d90 RIP=ffffffff814c0871 RFL=00000207 [-----PC] 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 00007fa902d19900 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=00007fa9032ce650 CR3=000000000958c000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000200 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff82243988 RBP=0000000000000020 RSP=ffff888015817a78 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff854145c0 R13=0000000000000001 R14=000000000003fd30 R15=fffffffffffffffb RIP=ffffffff845118ad 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 00007f65573fc900 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=00007f6556867130 CR3=0000000014598000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=15e66932e21b409c00000000000ae988 XMM05=b60834397ad307f30000000000132430 XMM06=c291bd5c70af25b90000000000131220 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000