syzkaller login: [ 38.757329] BUG: Bad rss-counter state mm:00000000892332bc type:MM_FILEPAGES val:33 [ 38.758990] BUG: Bad rss-counter state mm:00000000892332bc type:MM_ANONPAGES val:22 [ 38.932250] ================================================================== [ 38.933291] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.934237] Read of size 8 at addr ffff8880183e44e0 by task sshd/226 [ 38.935114] [ 38.935333] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.936247] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.937265] Call Trace: [ 38.937593] [ 38.937881] dump_stack_lvl+0x91/0xf0 [ 38.938386] print_report+0xcc/0x620 [ 38.938886] ? __virt_addr_valid+0x102/0x340 [ 38.939453] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.940105] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.940750] kasan_report+0xbe/0xf0 [ 38.941242] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.941864] vma_interval_tree_remove+0xc75/0xec0 [ 38.942479] vma_prepare+0xc54/0x11a0 [ 38.942958] __split_vma+0x5af/0x950 [ 38.943435] ? __pfx___split_vma+0x10/0x10 [ 38.943989] ? find_held_lock+0x2c/0x110 [ 38.944512] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.945086] ? lock_is_held_type+0x9f/0x120 [ 38.945632] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.946246] ? mtree_range_walk+0x632/0x900 [ 38.946814] ? mas_walk+0x5c7/0x7c0 [ 38.947293] do_vmi_munmap+0x1f1/0x2b0 [ 38.947787] mmap_region+0x1f9/0x2660 [ 38.948300] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.948818] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.949544] ? __pfx_lock_acquire+0x10/0x10 [ 38.950076] ? __pfx_mmap_region+0x10/0x10 [ 38.950624] ? security_mmap_addr+0x7d/0xa0 [ 38.951158] ? get_unmapped_area+0x1f5/0x3f0 [ 38.951729] do_mmap+0x854/0xf00 [ 38.952192] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.952702] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.953271] ksys_mmap_pgoff+0x3af/0x500 [ 38.953787] do_syscall_64+0x3f/0x90 [ 38.954271] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.954922] RIP: 0033:0x7f854d6c2d82 [ 38.955384] 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 [ 38.957511] RSP: 002b:00007ffd5d00ade8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.958432] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f854d6c2d82 [ 38.959286] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f854cafc000 [ 38.960158] RBP: 00007f854cafc000 R08: 0000000000000009 R09: 0000000000001000 [ 38.961016] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560a1fb95ec0 [ 38.961864] R13: 00007ffd5d00ae00 R14: 00007ffd5d00ae30 R15: 00007ffd5d00b190 [ 38.962732] [ 38.963028] [ 38.963249] Allocated by task 219: [ 38.963690] kasan_save_stack+0x22/0x50 [ 38.964232] kasan_set_track+0x25/0x30 [ 38.964735] __kasan_slab_alloc+0x59/0x70 [ 38.965261] kmem_cache_alloc+0x16b/0x370 [ 38.965775] vm_area_dup+0x20/0x160 [ 38.966233] __split_vma+0x170/0x950 [ 38.966709] split_vma+0xc6/0x110 [ 38.967167] mprotect_fixup+0x8d2/0xb30 [ 38.967674] do_mprotect_pkey+0x87e/0xd40 [ 38.968220] __x64_sys_mprotect+0x78/0xc0 [ 38.968759] do_syscall_64+0x3f/0x90 [ 38.969235] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.969899] [ 38.970116] Freed by task 219: [ 38.970508] kasan_save_stack+0x22/0x50 [ 38.971017] kasan_set_track+0x25/0x30 [ 38.971519] kasan_save_free_info+0x2b/0x50 [ 38.972083] __kasan_slab_free+0x10a/0x190 [ 38.972620] kmem_cache_free+0x10d/0x4d0 [ 38.973138] rcu_core+0x8c8/0x2860 [ 38.973590] __do_softirq+0x1b7/0x7d4 [ 38.974078] [ 38.974299] Last potentially related work creation: [ 38.974886] kasan_save_stack+0x22/0x50 [ 38.975404] __kasan_record_aux_stack+0x8e/0xa0 [ 38.975984] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.976634] remove_vma+0x139/0x170 [ 38.977094] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.977656] do_vmi_munmap+0x1f1/0x2b0 [ 38.978141] __vm_munmap+0x138/0x3a0 [ 38.978611] __x64_sys_munmap+0x59/0x80 [ 38.979109] do_syscall_64+0x3f/0x90 [ 38.979585] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.980246] [ 38.980467] The buggy address belongs to the object at ffff8880183e4488 [ 38.980467] which belongs to the cache vm_area_struct of size 168 [ 38.981934] The buggy address is located 88 bytes inside of [ 38.981934] freed 168-byte region [ffff8880183e4488, ffff8880183e4530) [ 38.983373] [ 38.983601] The buggy address belongs to the physical page: [ 38.984291] page:000000001e71048e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x183e4 [ 38.985407] memcg:ffff888019dab801 [ 38.985845] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.986503] page_type: 0xffffffff() [ 38.986958] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.987888] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019dab801 [ 38.988807] page dumped because: kasan: bad access detected [ 38.989476] [ 38.989696] Memory state around the buggy address: [ 38.990291] ffff8880183e4380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.991173] ffff8880183e4400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 38.992043] >ffff8880183e4480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.992914] ^ [ 38.993696] ffff8880183e4500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 38.994563] ffff8880183e4580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.995430] ================================================================== [ 38.996460] Disabling lock debugging due to kernel taint [ 41.196208] BUG: Bad rss-counter state mm:00000000c3e01ea2 type:MM_FILEPAGES val:33 [ 41.197411] BUG: Bad rss-counter state mm:00000000c3e01ea2 type:MM_ANONPAGES val:22 [ 41.747620] BUG: Bad rss-counter state mm:00000000f5a4c0c6 type:MM_FILEPAGES val:33 [ 41.748826] BUG: Bad rss-counter state mm:00000000f5a4c0c6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45165' (ECDSA) to the list of known hosts. 2023/06/21 01:51:49 fuzzer started 2023/06/21 01:51:49 dialing manager at localhost:36067 2023/06/21 01:51:49 checking machine... 2023/06/21 01:51:49 checking revisions... [ 42.409995] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:51:49 testing simple program... [ 42.477945] cgroup: Unknown subsys name 'net' [ 42.535091] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:51:48 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff81810711 RBP=ffff88801a0b1b40 RSP=ffff888008d9fcf0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000128 R12=ffff8880181121c0 R13=0000000000000000 R14=ffff88806ce35000 R15=ffff88801a0b3018 RIP=ffffffff814c0864 RFL=00000202 [-------] 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=00007f8f185333e0 CR3=0000000015848000 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=2038343a31353a3130203132206e754a XMM01=657463656e6e6f63736944203a5d3533 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3533325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a31353a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=1ffff110033bdf97 RCX=ffff888019defcd8 RDX=ffff888019defcf8 RSI=00007ffe5f3eac40 RDI=ffff888019defe60 RBP=0000000000000001 RSP=ffff888019defca8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff888019defe60 R14=00007ffe5f3eac40 R15=0000000000000000 RIP=ffffffff836403ca RFL=00000293 [--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 00007f9aa5dbc900 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=00007ffe5f3e7000 CR3=000000000ee52000 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=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