syzkaller login: [ 30.760799] BUG: Bad rss-counter state mm:000000006388e48f type:MM_FILEPAGES val:33 [ 30.762298] BUG: Bad rss-counter state mm:000000006388e48f type:MM_ANONPAGES val:22 [ 30.919113] ================================================================== [ 30.919968] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.920879] Read of size 8 at addr ffff888016944b38 by task sshd/222 [ 30.921626] [ 30.921840] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.922810] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.923752] Call Trace: [ 30.924067] [ 30.924340] dump_stack_lvl+0x91/0xf0 [ 30.924843] print_report+0xcc/0x620 [ 30.925327] ? __virt_addr_valid+0x102/0x340 [ 30.925864] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.926469] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.927069] kasan_report+0xbe/0xf0 [ 30.927532] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.928142] vma_interval_tree_remove+0xc75/0xec0 [ 30.928732] vma_prepare+0xc54/0x11a0 [ 30.929198] __split_vma+0x5af/0x950 [ 30.929660] ? __pfx___split_vma+0x10/0x10 [ 30.930180] ? find_held_lock+0x2c/0x110 [ 30.930685] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.931234] ? lock_is_held_type+0x9f/0x120 [ 30.931756] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.932344] ? mtree_range_walk+0x632/0x900 [ 30.932882] ? mas_walk+0x5c7/0x7c0 [ 30.933347] do_vmi_munmap+0x1f1/0x2b0 [ 30.933823] mmap_region+0x1f9/0x2660 [ 30.934317] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.934813] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.935502] ? __pfx_lock_acquire+0x10/0x10 [ 30.936019] ? __pfx_mmap_region+0x10/0x10 [ 30.936531] ? security_mmap_addr+0x7d/0xa0 [ 30.937051] ? get_unmapped_area+0x1f5/0x3f0 [ 30.937581] do_mmap+0x854/0xf00 [ 30.938020] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.938504] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.939057] ksys_mmap_pgoff+0x3af/0x500 [ 30.939553] do_syscall_64+0x3f/0x90 [ 30.940019] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.940645] RIP: 0033:0x7f6aa3830d82 [ 30.941086] 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 [ 30.943331] RSP: 002b:00007ffea0a27508 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.944247] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6aa3830d82 [ 30.945109] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6aa2c6a000 [ 30.945955] RBP: 00007f6aa2c6a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.946813] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d3c627f70 [ 30.947671] R13: 00007ffea0a27520 R14: 00007ffea0a27550 R15: 00007ffea0a278b0 [ 30.948532] [ 30.948825] [ 30.949041] Allocated by task 215: [ 30.949472] kasan_save_stack+0x22/0x50 [ 30.949986] kasan_set_track+0x25/0x30 [ 30.950500] __kasan_slab_alloc+0x59/0x70 [ 30.951033] kmem_cache_alloc+0x16b/0x370 [ 30.951549] vm_area_dup+0x20/0x160 [ 30.952001] __split_vma+0x170/0x950 [ 30.952467] split_vma+0xc6/0x110 [ 30.952918] mprotect_fixup+0x8d2/0xb30 [ 30.953431] do_mprotect_pkey+0x87e/0xd40 [ 30.953961] __x64_sys_mprotect+0x78/0xc0 [ 30.954605] do_syscall_64+0x3f/0x90 [ 30.955072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.955698] [ 30.955907] Freed by task 215: [ 30.956290] kasan_save_stack+0x22/0x50 [ 30.956781] kasan_set_track+0x25/0x30 [ 30.957265] kasan_save_free_info+0x2b/0x50 [ 30.957785] __kasan_slab_free+0x10a/0x190 [ 30.958311] kmem_cache_free+0x10d/0x4d0 [ 30.958806] rcu_core+0x8c8/0x2860 [ 30.959241] __do_softirq+0x1b7/0x7d4 [ 30.959706] [ 30.959915] Last potentially related work creation: [ 30.960480] kasan_save_stack+0x22/0x50 [ 30.960967] __kasan_record_aux_stack+0x8e/0xa0 [ 30.961523] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.962158] remove_vma+0x139/0x170 [ 30.962597] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.963141] do_vmi_munmap+0x1f1/0x2b0 [ 30.963613] __vm_munmap+0x138/0x3a0 [ 30.964139] __x64_sys_munmap+0x59/0x80 [ 30.964620] do_syscall_64+0x3f/0x90 [ 30.965082] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.965713] [ 30.965923] The buggy address belongs to the object at ffff888016944ae0 [ 30.965923] which belongs to the cache vm_area_struct of size 168 [ 30.967353] The buggy address is located 88 bytes inside of [ 30.967353] freed 168-byte region [ffff888016944ae0, ffff888016944b88) [ 30.968717] [ 30.968928] The buggy address belongs to the physical page: [ 30.969568] page:000000006ca6853d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16944 [ 30.970640] memcg:ffff88800ead7901 [ 30.971057] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.971698] page_type: 0xffffffff() [ 30.972153] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.973074] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ead7901 [ 30.973988] page dumped because: kasan: bad access detected [ 30.974670] [ 30.974886] Memory state around the buggy address: [ 30.975447] ffff888016944a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.976275] ffff888016944a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.977105] >ffff888016944b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.977941] ^ [ 30.978554] ffff888016944b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.979392] ffff888016944c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.980223] ================================================================== [ 30.981107] Disabling lock debugging due to kernel taint [ 32.418382] BUG: Bad rss-counter state mm:000000006cc070bb type:MM_FILEPAGES val:33 [ 32.419279] BUG: Bad rss-counter state mm:000000006cc070bb type:MM_ANONPAGES val:22 [ 32.858533] BUG: Bad rss-counter state mm:00000000bee04fdd type:MM_FILEPAGES val:33 [ 32.859686] BUG: Bad rss-counter state mm:00000000bee04fdd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20042' (ECDSA) to the list of known hosts. 2023/06/20 23:44:55 fuzzer started 2023/06/20 23:44:56 dialing manager at localhost:36067 2023/06/20 23:44:56 checking machine... 2023/06/20 23:44:56 checking revisions... [ 33.552176] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:44:56 testing simple program... [ 33.605807] cgroup: Unknown subsys name 'net' [ 33.667496] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:44:55 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff88801a0c9b40 RSI=0000000000000201 RDI=ffffffff83c5c559 RBP=ffff88800f886560 RSP=ffff888016f8f560 R8 =ffff888016f8f728 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000001 R14=ffff888016f8f728 R15=ffff88800db1c640 RIP=ffffffff8118c9b4 RFL=00000246 [---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 00007f6bfaca2900 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=00007ffd59b42000 CR3=000000000f63a000 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=0000000000000001 RBX=ffff88806cf35000 RCX=ffffffff815343f6 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84535d53 RSP=ffff88806cf09da8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000287 R13=ffffea000063e200 R14=ffffffff818d9c06 R15=ffff88800da12e80 RIP=ffffffff8135b980 RFL=00000082 [--S----] 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 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=00007f320a8eda70 CR3=000000000ef34000 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=ae17b771ccd0448fd14616b64f9ef46e XMM02=000000000011a618eff9b2d0a8fce9cb XMM03=000000000011a6e82c67c8bc2e329bc3 XMM04=e40eea1a2b2c641f00000000000ae988 XMM05=59d5b690e0af863b0000000000131da0 XMM06=caec8508dc3245c50000000000130c08 XMM07=e042d86d42eb936e0000000000122250 XMM08=9c41c69373349065000000000011a6e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000