syzkaller login: [ 35.569756] BUG: Bad rss-counter state mm:00000000b10a9a5e type:MM_FILEPAGES val:33 [ 35.571183] BUG: Bad rss-counter state mm:00000000b10a9a5e type:MM_ANONPAGES val:22 [ 35.741113] ================================================================== [ 35.741990] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.742906] Read of size 8 at addr ffff88800d788228 by task sshd/219 [ 35.743758] [ 35.743975] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.744816] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.745804] Call Trace: [ 35.746126] [ 35.746410] dump_stack_lvl+0x91/0xf0 [ 35.746890] print_report+0xcc/0x620 [ 35.747385] ? __virt_addr_valid+0x102/0x340 [ 35.747931] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.748531] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.749147] kasan_report+0xbe/0xf0 [ 35.749609] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.750230] vma_interval_tree_remove+0xc75/0xec0 [ 35.750827] vma_prepare+0xc54/0x11a0 [ 35.751308] __split_vma+0x5af/0x950 [ 35.751767] ? __pfx___split_vma+0x10/0x10 [ 35.752285] ? find_held_lock+0x2c/0x110 [ 35.752796] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.753355] ? lock_is_held_type+0x9f/0x120 [ 35.753884] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.754478] ? mtree_range_walk+0x632/0x900 [ 35.755049] ? mas_walk+0x5c7/0x7c0 [ 35.755525] do_vmi_munmap+0x1f1/0x2b0 [ 35.756005] mmap_region+0x1f9/0x2660 [ 35.756483] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.756982] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.757678] ? __pfx_lock_acquire+0x10/0x10 [ 35.758210] ? __pfx_mmap_region+0x10/0x10 [ 35.758737] ? security_mmap_addr+0x7d/0xa0 [ 35.759258] ? get_unmapped_area+0x1f5/0x3f0 [ 35.759798] do_mmap+0x854/0xf00 [ 35.760235] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.760728] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.761289] ksys_mmap_pgoff+0x3af/0x500 [ 35.761790] do_syscall_64+0x3f/0x90 [ 35.762271] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.762915] RIP: 0033:0x7f9ddc2e0d82 [ 35.763378] 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 [ 35.765453] RSP: 002b:00007ffd298dbcf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.766338] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9ddc2e0d82 [ 35.767188] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9ddb71a000 [ 35.768015] RBP: 00007f9ddb71a000 R08: 0000000000000009 R09: 0000000000001000 [ 35.768847] R10: 0000000000000812 R11: 0000000000000206 R12: 000056497a59eb20 [ 35.769668] R13: 00007ffd298dbd10 R14: 00007ffd298dbd40 R15: 00007ffd298dc0a0 [ 35.770501] [ 35.770802] [ 35.771021] Allocated by task 212: [ 35.771449] kasan_save_stack+0x22/0x50 [ 35.771949] kasan_set_track+0x25/0x30 [ 35.772434] __kasan_slab_alloc+0x59/0x70 [ 35.772958] kmem_cache_alloc+0x16b/0x370 [ 35.773466] vm_area_dup+0x20/0x160 [ 35.773923] __split_vma+0x170/0x950 [ 35.774380] split_vma+0xc6/0x110 [ 35.774811] mprotect_fixup+0x8d2/0xb30 [ 35.775337] do_mprotect_pkey+0x87e/0xd40 [ 35.775860] __x64_sys_mprotect+0x78/0xc0 [ 35.776378] do_syscall_64+0x3f/0x90 [ 35.776849] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.777480] [ 35.777695] Freed by task 212: [ 35.778082] kasan_save_stack+0x22/0x50 [ 35.778594] kasan_set_track+0x25/0x30 [ 35.779087] kasan_save_free_info+0x2b/0x50 [ 35.779609] __kasan_slab_free+0x10a/0x190 [ 35.780142] kmem_cache_free+0x10d/0x4d0 [ 35.780643] rcu_core+0x8c8/0x2860 [ 35.781086] __do_softirq+0x1b7/0x7d4 [ 35.781560] [ 35.781776] Last potentially related work creation: [ 35.782356] kasan_save_stack+0x22/0x50 [ 35.782851] __kasan_record_aux_stack+0x8e/0xa0 [ 35.783429] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.784063] remove_vma+0x139/0x170 [ 35.784510] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.785059] do_vmi_munmap+0x1f1/0x2b0 [ 35.785540] __vm_munmap+0x138/0x3a0 [ 35.785993] __x64_sys_munmap+0x59/0x80 [ 35.786491] do_syscall_64+0x3f/0x90 [ 35.786965] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.787597] [ 35.787812] The buggy address belongs to the object at ffff88800d7881d0 [ 35.787812] which belongs to the cache vm_area_struct of size 168 [ 35.789263] The buggy address is located 88 bytes inside of [ 35.789263] freed 168-byte region [ffff88800d7881d0, ffff88800d788278) [ 35.790640] [ 35.790858] The buggy address belongs to the physical page: [ 35.791534] page:00000000e5b00875 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd788 [ 35.792594] memcg:ffff88800dc7e001 [ 35.793035] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.793672] page_type: 0xffffffff() [ 35.794128] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 35.795041] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc7e001 [ 35.795952] page dumped because: kasan: bad access detected [ 35.796596] [ 35.796814] Memory state around the buggy address: [ 35.797398] ffff88800d788100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.798241] ffff88800d788180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 35.799106] >ffff88800d788200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 35.799956] ^ [ 35.800502] ffff88800d788280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 35.801345] ffff88800d788300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 35.802180] ================================================================== [ 35.803150] Disabling lock debugging due to kernel taint [ 37.650912] BUG: Bad rss-counter state mm:00000000c37243ee type:MM_FILEPAGES val:33 [ 37.651891] BUG: Bad rss-counter state mm:00000000c37243ee type:MM_ANONPAGES val:22 [ 38.214972] BUG: Bad rss-counter state mm:000000003ff852d3 type:MM_FILEPAGES val:33 [ 38.216134] BUG: Bad rss-counter state mm:000000003ff852d3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7571' (ECDSA) to the list of known hosts. 2023/06/21 06:08:07 fuzzer started 2023/06/21 06:08:07 dialing manager at localhost:36067 2023/06/21 06:08:07 checking machine... 2023/06/21 06:08:07 checking revisions... [ 38.862639] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:08:07 testing simple program... [ 38.916250] cgroup: Unknown subsys name 'net' [ 38.960861] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:08:07 Registers: info registers vcpu 0 RAX=ffffffff86138e8c RBX=ffffffff85dfe01c RCX=ffffffff8180c6a1 RDX=0000000000000000 RSI=ffffffff86138e62 RDI=ffffffff85dfe000 RBP=ffffffff85dfe020 RSP=ffff88806ce099f0 R8 =ffffffff86138e62 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8f R12=ffffffff85dfe01c R13=ffffffff85dfe000 R14=0000000000000007 R15=dffffc0000000000 RIP=ffffffff8112fcb7 RFL=00000286 [--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 00007f24a09d3900 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=0000564d545b1d68 CR3=0000000018fbc000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000034 RBX=0000000000000001 RCX=ffffffff8180c6a1 RDX=0000000000000034 RSI=ffffffff86138e62 RDI=ffffffff85dfe000 RBP=ffffffff85dfe000 RSP=ffff888008e37848 R8 =ffffffff86138e62 R9 =ffff888008e37940 R10=0000000000038001 R11=0000000000020d8f R12=ffffffff85dfe034 R13=ffffffff85dfe000 R14=ffffffff85dfe000 R15=dffffc0000000000 RIP=ffffffff8112fc60 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 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=00007f72ab543b20 CR3=000000000caf4000 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=5e1f68a673cda5995646411f4f2e2ef6 XMM02=eff9b2d0a8fce9cb000000000011b508 XMM03=2c67c8bc2e329bc3000000000011b630 XMM04=ad4958378f3fb1c000000000000ae988 XMM05=a843a22fcf6065970000000000132fa8 XMM06=dfcdbad4f1609c370000000000131ad0 XMM07=fb795ef6d65770560000000000121fd0 XMM08=2c67c8bc2e329bc3000000000011b630 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000