syzkaller login: [ 35.356462] BUG: Bad rss-counter state mm:00000000c03164a2 type:MM_FILEPAGES val:33 [ 35.357938] BUG: Bad rss-counter state mm:00000000c03164a2 type:MM_ANONPAGES val:22 [ 35.533598] ================================================================== [ 35.534704] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.535803] Read of size 8 at addr ffff88800e13e140 by task sshd/218 [ 35.536850] [ 35.537111] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.538123] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.539270] Call Trace: [ 35.539590] [ 35.539870] dump_stack_lvl+0x91/0xf0 [ 35.540363] print_report+0xcc/0x620 [ 35.540848] ? __virt_addr_valid+0x102/0x340 [ 35.541408] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.542026] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.542678] kasan_report+0xbe/0xf0 [ 35.543151] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.543767] vma_interval_tree_remove+0xc75/0xec0 [ 35.544375] vma_prepare+0xc54/0x11a0 [ 35.544852] __split_vma+0x5af/0x950 [ 35.545317] ? __pfx___split_vma+0x10/0x10 [ 35.545845] ? find_held_lock+0x2c/0x110 [ 35.546366] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.546949] ? lock_is_held_type+0x9f/0x120 [ 35.547500] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.548123] ? mtree_range_walk+0x632/0x900 [ 35.548686] ? mas_walk+0x5c7/0x7c0 [ 35.549160] do_vmi_munmap+0x1f1/0x2b0 [ 35.549660] mmap_region+0x1f9/0x2660 [ 35.550145] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.550653] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.551377] ? __pfx_lock_acquire+0x10/0x10 [ 35.551902] ? __pfx_mmap_region+0x10/0x10 [ 35.552436] ? security_mmap_addr+0x7d/0xa0 [ 35.552983] ? get_unmapped_area+0x1f5/0x3f0 [ 35.553542] do_mmap+0x854/0xf00 [ 35.553977] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.554470] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.555028] ksys_mmap_pgoff+0x3af/0x500 [ 35.555535] do_syscall_64+0x3f/0x90 [ 35.556012] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.556653] RIP: 0033:0x7f857861fd82 [ 35.557103] 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 [ 35.559234] RSP: 002b:00007fff60b48478 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.560132] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f857861fd82 [ 35.560971] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8577a59000 [ 35.561810] RBP: 00007f8577a59000 R08: 0000000000000009 R09: 0000000000001000 [ 35.562645] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b1f24ecec0 [ 35.563497] R13: 00007fff60b48490 R14: 00007fff60b484c0 R15: 00007fff60b48820 [ 35.564353] [ 35.564645] [ 35.564866] Allocated by task 211: [ 35.565305] kasan_save_stack+0x22/0x50 [ 35.565819] kasan_set_track+0x25/0x30 [ 35.566328] __kasan_slab_alloc+0x59/0x70 [ 35.566877] kmem_cache_alloc+0x16b/0x370 [ 35.567408] vm_area_dup+0x20/0x160 [ 35.567873] __split_vma+0x170/0x950 [ 35.568361] split_vma+0xc6/0x110 [ 35.568820] mprotect_fixup+0x8d2/0xb30 [ 35.569338] do_mprotect_pkey+0x87e/0xd40 [ 35.569858] __x64_sys_mprotect+0x78/0xc0 [ 35.570391] do_syscall_64+0x3f/0x90 [ 35.570875] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.571528] [ 35.571751] Freed by task 211: [ 35.572146] kasan_save_stack+0x22/0x50 [ 35.572654] kasan_set_track+0x25/0x30 [ 35.573161] kasan_save_free_info+0x2b/0x50 [ 35.573704] __kasan_slab_free+0x10a/0x190 [ 35.574232] kmem_cache_free+0x10d/0x4d0 [ 35.574758] rcu_core+0x8c8/0x2860 [ 35.575211] __do_softirq+0x1b7/0x7d4 [ 35.575688] [ 35.575910] Last potentially related work creation: [ 35.576519] kasan_save_stack+0x22/0x50 [ 35.577028] __kasan_record_aux_stack+0x8e/0xa0 [ 35.577592] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.578304] remove_vma+0x139/0x170 [ 35.578761] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.579312] do_vmi_munmap+0x1f1/0x2b0 [ 35.579801] __vm_munmap+0x138/0x3a0 [ 35.580263] __x64_sys_munmap+0x59/0x80 [ 35.580753] do_syscall_64+0x3f/0x90 [ 35.581231] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.581882] [ 35.582094] Second to last potentially related work creation: [ 35.582790] kasan_save_stack+0x22/0x50 [ 35.583311] __kasan_record_aux_stack+0x8e/0xa0 [ 35.583880] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.584532] remove_vma+0x139/0x170 [ 35.584980] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.585541] do_vmi_munmap+0x1f1/0x2b0 [ 35.586026] mmap_region+0x1f9/0x2660 [ 35.586510] do_mmap+0x854/0xf00 [ 35.586957] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.587460] ksys_mmap_pgoff+0x3af/0x500 [ 35.587963] do_syscall_64+0x3f/0x90 [ 35.588439] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.589090] [ 35.589305] The buggy address belongs to the object at ffff88800e13e0e8 [ 35.589305] which belongs to the cache vm_area_struct of size 168 [ 35.590781] The buggy address is located 88 bytes inside of [ 35.590781] freed 168-byte region [ffff88800e13e0e8, ffff88800e13e190) [ 35.592191] [ 35.592408] The buggy address belongs to the physical page: [ 35.593064] page:0000000038824d79 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe13e [ 35.594139] memcg:ffff88800e3fdb01 [ 35.594573] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.595232] page_type: 0xffffffff() [ 35.595679] raw: 0100000000000200 ffff8880087a0c80 ffffea000039bdc0 dead000000000008 [ 35.596593] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3fdb01 [ 35.597496] page dumped because: kasan: bad access detected [ 35.598150] [ 35.598362] Memory state around the buggy address: [ 35.598951] ffff88800e13e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.599797] ffff88800e13e080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 35.600648] >ffff88800e13e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.601498] ^ [ 35.602123] ffff88800e13e180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 35.602982] ffff88800e13e200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 35.603820] ================================================================== [ 35.604754] Disabling lock debugging due to kernel taint [ 37.656897] BUG: Bad rss-counter state mm:000000008cb32c00 type:MM_FILEPAGES val:33 [ 37.658442] BUG: Bad rss-counter state mm:000000008cb32c00 type:MM_ANONPAGES val:22 [ 38.113843] BUG: Bad rss-counter state mm:000000001ad79d51 type:MM_FILEPAGES val:33 [ 38.114631] BUG: Bad rss-counter state mm:000000001ad79d51 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25472' (ECDSA) to the list of known hosts. 2023/06/20 11:43:13 fuzzer started 2023/06/20 11:43:13 dialing manager at localhost:36067 2023/06/20 11:43:13 checking machine... 2023/06/20 11:43:13 checking revisions... [ 38.796597] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:43:13 testing simple program... [ 38.849809] cgroup: Unknown subsys name 'net' [ 38.904037] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:43:13 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=00000000b2df1cbe RCX=ffff88806cb8e5f0 RDX=0000000000000006 RSI=0000000000000003 RDI=00000000db050389 RBP=ffff8880087f8210 RSP=ffff88806ce09b40 R8 =00000000da2f0178 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88806ce09ba8 R15=0000000000000006 RIP=ffffffff822704d3 RFL=00000206 [-----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 00007fccd56dc900 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=00007fccd5c940b0 CR3=0000000008eb6000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=ff000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=000a687361622f6e69622f3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=00007f484a948fe0 CR3=000000000d8be000 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=2033313a33343a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a33343a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000