syzkaller login: [ 30.366733] BUG: Bad rss-counter state mm:0000000017c6ac79 type:MM_FILEPAGES val:33 [ 30.367550] BUG: Bad rss-counter state mm:0000000017c6ac79 type:MM_ANONPAGES val:22 [ 30.479863] ================================================================== [ 30.480496] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.481141] Read of size 8 at addr ffff88800c4e6228 by task sshd/220 [ 30.481748] [ 30.481906] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.482513] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.483179] Call Trace: [ 30.483402] [ 30.483604] dump_stack_lvl+0x91/0xf0 [ 30.483946] print_report+0xcc/0x620 [ 30.484285] ? __virt_addr_valid+0x102/0x340 [ 30.484851] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.485258] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.485732] kasan_report+0xbe/0xf0 [ 30.486052] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.486502] vma_interval_tree_remove+0xc75/0xec0 [ 30.486946] vma_prepare+0xc54/0x11a0 [ 30.487278] __split_vma+0x5af/0x950 [ 30.487615] ? __pfx___split_vma+0x10/0x10 [ 30.487972] ? find_held_lock+0x2c/0x110 [ 30.488317] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.488695] ? lock_is_held_type+0x9f/0x120 [ 30.489042] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.489482] ? mtree_range_walk+0x632/0x900 [ 30.489854] ? mas_walk+0x5c7/0x7c0 [ 30.490169] do_vmi_munmap+0x1f1/0x2b0 [ 30.490485] mmap_region+0x1f9/0x2660 [ 30.490809] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.491158] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.491654] ? __pfx_lock_acquire+0x10/0x10 [ 30.492015] ? __pfx_mmap_region+0x10/0x10 [ 30.492383] ? security_mmap_addr+0x7d/0xa0 [ 30.492756] ? get_unmapped_area+0x1f5/0x3f0 [ 30.493135] do_mmap+0x854/0xf00 [ 30.493511] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.493917] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.494348] ksys_mmap_pgoff+0x3af/0x500 [ 30.494693] do_syscall_64+0x3f/0x90 [ 30.495032] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.495471] RIP: 0033:0x7fac3662ad82 [ 30.495769] 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 [ 30.497209] RSP: 002b:00007ffffa87b988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.497899] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fac3662ad82 [ 30.498528] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fac35a64000 [ 30.499100] RBP: 00007fac35a64000 R08: 0000000000000009 R09: 0000000000001000 [ 30.499676] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555cf80aff60 [ 30.500263] R13: 00007ffffa87b9a0 R14: 00007ffffa87b9d0 R15: 00007ffffa87bd30 [ 30.501003] [ 30.501197] [ 30.501378] Allocated by task 213: [ 30.501657] kasan_save_stack+0x22/0x50 [ 30.502006] kasan_set_track+0x25/0x30 [ 30.502350] __kasan_slab_alloc+0x59/0x70 [ 30.502716] kmem_cache_alloc+0x16b/0x370 [ 30.503084] vm_area_dup+0x20/0x160 [ 30.503400] __split_vma+0x170/0x950 [ 30.503712] split_vma+0xc6/0x110 [ 30.503998] mprotect_fixup+0x8d2/0xb30 [ 30.504335] do_mprotect_pkey+0x87e/0xd40 [ 30.504684] __x64_sys_mprotect+0x78/0xc0 [ 30.505024] do_syscall_64+0x3f/0x90 [ 30.505416] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.505855] [ 30.505999] Freed by task 19: [ 30.506256] kasan_save_stack+0x22/0x50 [ 30.506580] kasan_set_track+0x25/0x30 [ 30.506898] kasan_save_free_info+0x2b/0x50 [ 30.507243] __kasan_slab_free+0x10a/0x190 [ 30.507586] kmem_cache_free+0x10d/0x4d0 [ 30.507924] rcu_core+0x8c8/0x2860 [ 30.508234] __do_softirq+0x1b7/0x7d4 [ 30.508552] [ 30.508692] Last potentially related work creation: [ 30.509079] kasan_save_stack+0x22/0x50 [ 30.509452] __kasan_record_aux_stack+0x8e/0xa0 [ 30.509821] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.510258] remove_vma+0x139/0x170 [ 30.510553] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.510919] do_vmi_munmap+0x1f1/0x2b0 [ 30.511249] __vm_munmap+0x138/0x3a0 [ 30.511570] __x64_sys_munmap+0x59/0x80 [ 30.511877] do_syscall_64+0x3f/0x90 [ 30.512173] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.512578] [ 30.512721] Second to last potentially related work creation: [ 30.513165] kasan_save_stack+0x22/0x50 [ 30.513520] __kasan_record_aux_stack+0x8e/0xa0 [ 30.513880] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.514295] remove_vma+0x139/0x170 [ 30.514589] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.514942] do_vmi_munmap+0x1f1/0x2b0 [ 30.515256] mmap_region+0x1f9/0x2660 [ 30.515559] do_mmap+0x854/0xf00 [ 30.515833] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.516148] ksys_mmap_pgoff+0x3af/0x500 [ 30.516482] do_syscall_64+0x3f/0x90 [ 30.516791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.517206] [ 30.517387] The buggy address belongs to the object at ffff88800c4e61d0 [ 30.517387] which belongs to the cache vm_area_struct of size 168 [ 30.518319] The buggy address is located 88 bytes inside of [ 30.518319] freed 168-byte region [ffff88800c4e61d0, ffff88800c4e6278) [ 30.519189] [ 30.519331] The buggy address belongs to the physical page: [ 30.519758] page:00000000084247da refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800c4e6488 pfn:0xc4e6 [ 30.520602] memcg:ffff88800e835c01 [ 30.520900] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.521373] page_type: 0xffffffff() [ 30.521675] raw: 0100000000000200 ffff8880087a0c80 ffffea0000327040 dead000000000004 [ 30.522408] raw: ffff88800c4e6488 000000008011000f 00000001ffffffff ffff88800e835c01 [ 30.523083] page dumped because: kasan: bad access detected [ 30.523540] [ 30.523692] Memory state around the buggy address: [ 30.524112] ffff88800c4e6100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.524689] ffff88800c4e6180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.525258] >ffff88800c4e6200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.525870] ^ [ 30.526236] ffff88800c4e6280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.526789] ffff88800c4e6300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.527333] ================================================================== [ 30.527992] Disabling lock debugging due to kernel taint [ 31.917818] BUG: Bad rss-counter state mm:0000000003565c46 type:MM_FILEPAGES val:33 [ 31.918452] BUG: Bad rss-counter state mm:0000000003565c46 type:MM_ANONPAGES val:22 [ 32.296680] BUG: Bad rss-counter state mm:000000001993a40c type:MM_FILEPAGES val:33 [ 32.297333] BUG: Bad rss-counter state mm:000000001993a40c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60626' (ECDSA) to the list of known hosts. 2023/06/21 08:28:00 fuzzer started 2023/06/21 08:28:00 dialing manager at localhost:36067 2023/06/21 08:28:00 checking machine... 2023/06/21 08:28:00 checking revisions... [ 32.875640] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:28:00 testing simple program... [ 32.907795] cgroup: Unknown subsys name 'net' [ 32.942921] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:28:00 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffc4ee4be68 CR3=0000000005482000 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=00007f18ef79951000005575fff67790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88806cf09a78 RCX=ffffffff86139701 RDX=1ffff1100d9e135a RSI=0000000000000000 RDI=ffffffff8180ca5a RBP=ffff88806cf09ad0 RSP=ffff88806cf09a60 R8 =ffffffff86139748 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020f03 R12=ffff88806cf09b40 R13=0000000000000000 R14=ffff888015ce9b40 R15=ffff8880147c4180 RIP=ffffffff81130399 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 00007f7aa995d700 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=00007f3aa8f9b038 CR3=000000000ea18000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732039353a3732 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343231 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000