syzkaller login: [ 30.306704] BUG: Bad rss-counter state mm:00000000a094746f type:MM_FILEPAGES val:33 [ 30.308684] BUG: Bad rss-counter state mm:00000000a094746f type:MM_ANONPAGES val:22 [ 30.478705] ================================================================== [ 30.479613] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.480534] Read of size 8 at addr ffff88800d820c20 by task sshd/220 [ 30.481422] [ 30.481640] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.482519] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.483504] Call Trace: [ 30.483818] [ 30.484103] dump_stack_lvl+0x91/0xf0 [ 30.484588] print_report+0xcc/0x620 [ 30.485064] ? __virt_addr_valid+0x102/0x340 [ 30.485615] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.486243] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.486861] kasan_report+0xbe/0xf0 [ 30.487334] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.487956] vma_interval_tree_remove+0xc75/0xec0 [ 30.488558] vma_prepare+0xc54/0x11a0 [ 30.489029] __split_vma+0x5af/0x950 [ 30.489498] ? __pfx___split_vma+0x10/0x10 [ 30.490022] ? find_held_lock+0x2c/0x110 [ 30.490549] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.491106] ? lock_is_held_type+0x9f/0x120 [ 30.491645] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.492250] ? mtree_range_walk+0x632/0x900 [ 30.492801] ? mas_walk+0x5c7/0x7c0 [ 30.493270] do_vmi_munmap+0x1f1/0x2b0 [ 30.493754] mmap_region+0x1f9/0x2660 [ 30.494251] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.494755] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.495472] ? __pfx_lock_acquire+0x10/0x10 [ 30.495998] ? __pfx_mmap_region+0x10/0x10 [ 30.496523] ? security_mmap_addr+0x7d/0xa0 [ 30.497047] ? get_unmapped_area+0x1f5/0x3f0 [ 30.497597] do_mmap+0x854/0xf00 [ 30.498032] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.498532] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.499087] ksys_mmap_pgoff+0x3af/0x500 [ 30.499590] do_syscall_64+0x3f/0x90 [ 30.500062] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.500704] RIP: 0033:0x7fe7aa923d82 [ 30.501155] 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 [ 30.503272] RSP: 002b:00007ffc5e0d21a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.504172] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe7aa923d82 [ 30.505014] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe7a9d5d000 [ 30.505857] RBP: 00007fe7a9d5d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.506699] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fed2e78d90 [ 30.507531] R13: 00007ffc5e0d21c0 R14: 00007ffc5e0d21f0 R15: 00007ffc5e0d2550 [ 30.508373] [ 30.508662] [ 30.508876] Allocated by task 213: [ 30.509294] kasan_save_stack+0x22/0x50 [ 30.509789] kasan_set_track+0x25/0x30 [ 30.510290] __kasan_slab_alloc+0x59/0x70 [ 30.510804] kmem_cache_alloc+0x16b/0x370 [ 30.511314] vm_area_dup+0x20/0x160 [ 30.511761] __split_vma+0x170/0x950 [ 30.512225] split_vma+0xc6/0x110 [ 30.512659] mprotect_fixup+0x8d2/0xb30 [ 30.513152] do_mprotect_pkey+0x87e/0xd40 [ 30.513662] __x64_sys_mprotect+0x78/0xc0 [ 30.514187] do_syscall_64+0x3f/0x90 [ 30.514661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.515295] [ 30.515509] Freed by task 211: [ 30.515898] kasan_save_stack+0x22/0x50 [ 30.516392] kasan_set_track+0x25/0x30 [ 30.516880] kasan_save_free_info+0x2b/0x50 [ 30.517408] __kasan_slab_free+0x10a/0x190 [ 30.517934] kmem_cache_free+0x10d/0x4d0 [ 30.518455] rcu_core+0x8c8/0x2860 [ 30.518892] __do_softirq+0x1b7/0x7d4 [ 30.519362] [ 30.519573] Last potentially related work creation: [ 30.520147] kasan_save_stack+0x22/0x50 [ 30.520641] __kasan_record_aux_stack+0x8e/0xa0 [ 30.521203] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.521836] remove_vma+0x139/0x170 [ 30.522288] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.522836] do_vmi_munmap+0x1f1/0x2b0 [ 30.523315] __vm_munmap+0x138/0x3a0 [ 30.523777] __x64_sys_munmap+0x59/0x80 [ 30.524267] do_syscall_64+0x3f/0x90 [ 30.524732] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.525365] [ 30.525586] The buggy address belongs to the object at ffff88800d820bc8 [ 30.525586] which belongs to the cache vm_area_struct of size 168 [ 30.527037] The buggy address is located 88 bytes inside of [ 30.527037] freed 168-byte region [ffff88800d820bc8, ffff88800d820c70) [ 30.528411] [ 30.528626] The buggy address belongs to the physical page: [ 30.529272] page:000000009458c455 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd820 [ 30.530347] memcg:ffff888019faa401 [ 30.530773] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.531410] page_type: 0xffffffff() [ 30.531856] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.532758] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019faa401 [ 30.533648] page dumped because: kasan: bad access detected [ 30.534303] [ 30.534517] Memory state around the buggy address: [ 30.535089] ffff88800d820b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.535933] ffff88800d820b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.536784] >ffff88800d820c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.537619] ^ [ 30.538152] ffff88800d820c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.539004] ffff88800d820d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.539843] ================================================================== [ 30.540806] Disabling lock debugging due to kernel taint [ 32.455189] BUG: Bad rss-counter state mm:00000000ef16f297 type:MM_FILEPAGES val:33 [ 32.456378] BUG: Bad rss-counter state mm:00000000ef16f297 type:MM_ANONPAGES val:22 [ 32.939149] BUG: Bad rss-counter state mm:0000000055193d61 type:MM_FILEPAGES val:33 [ 32.940314] BUG: Bad rss-counter state mm:0000000055193d61 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39465' (ECDSA) to the list of known hosts. 2023/06/21 04:59:04 fuzzer started 2023/06/21 04:59:04 dialing manager at localhost:36067 2023/06/21 04:59:04 checking machine... 2023/06/21 04:59:04 checking revisions... [ 33.576561] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:59:05 testing simple program... [ 33.621249] cgroup: Unknown subsys name 'net' [ 33.671090] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:59:04 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000202 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88801a0b0850 RBP=ffff88801a0b0850 RSP=ffff88800f7776f8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88801a0b08e0 R13=ffff88801a0b0890 R14=ffffffff83675648 R15=ffff8880145e1600 RIP=ffffffff812e0431 RFL=00000086 [--S--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 00007f57106f3900 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=000055607a0b2954 CR3=000000000dc52000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f4f8993eb10 CR3=000000000ef76000 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=2034303a39353a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a39353a3430203132 XMM08=00007fa0540042700000008300000100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000