syzkaller login: [ 41.524129] BUG: Bad rss-counter state mm:00000000f3422711 type:MM_FILEPAGES val:33 [ 41.525392] BUG: Bad rss-counter state mm:00000000f3422711 type:MM_ANONPAGES val:22 [ 41.674993] ================================================================== [ 41.675986] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.676996] Read of size 8 at addr ffff8880199e86b0 by task sshd/219 [ 41.677963] [ 41.678222] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.679155] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.680174] Call Trace: [ 41.680489] [ 41.680775] dump_stack_lvl+0x91/0xf0 [ 41.681304] print_report+0xcc/0x620 [ 41.681853] ? __virt_addr_valid+0x102/0x340 [ 41.682450] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.683121] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.683787] kasan_report+0xbe/0xf0 [ 41.684267] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.684895] vma_interval_tree_remove+0xc75/0xec0 [ 41.685557] vma_prepare+0xc54/0x11a0 [ 41.686094] __split_vma+0x5af/0x950 [ 41.686613] ? __pfx___split_vma+0x10/0x10 [ 41.687193] ? find_held_lock+0x2c/0x110 [ 41.687765] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.688393] ? lock_is_held_type+0x9f/0x120 [ 41.688992] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.689659] ? mtree_range_walk+0x632/0x900 [ 41.690268] ? mas_walk+0x5c7/0x7c0 [ 41.690794] do_vmi_munmap+0x1f1/0x2b0 [ 41.691338] mmap_region+0x1f9/0x2660 [ 41.691886] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.692389] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.693125] ? __pfx_lock_acquire+0x10/0x10 [ 41.693709] ? __pfx_mmap_region+0x10/0x10 [ 41.694314] ? security_mmap_addr+0x7d/0xa0 [ 41.694903] ? get_unmapped_area+0x1f5/0x3f0 [ 41.695507] do_mmap+0x854/0xf00 [ 41.695984] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.696479] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.697066] ksys_mmap_pgoff+0x3af/0x500 [ 41.697634] do_syscall_64+0x3f/0x90 [ 41.698169] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.698889] RIP: 0033:0x7f41b1088d82 [ 41.699394] 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 [ 41.701643] RSP: 002b:00007fff5d80bd28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.702655] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f41b1088d82 [ 41.703584] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f41b04c2000 [ 41.704459] RBP: 00007f41b04c2000 R08: 0000000000000009 R09: 0000000000001000 [ 41.705361] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559ef5cbef60 [ 41.706308] R13: 00007fff5d80bd40 R14: 00007fff5d80bd70 R15: 00007fff5d80c0d0 [ 41.707265] [ 41.707594] [ 41.707838] Allocated by task 212: [ 41.708271] kasan_save_stack+0x22/0x50 [ 41.708775] kasan_set_track+0x25/0x30 [ 41.709318] __kasan_slab_alloc+0x59/0x70 [ 41.709905] kmem_cache_alloc+0x16b/0x370 [ 41.710484] vm_area_dup+0x20/0x160 [ 41.710998] __split_vma+0x170/0x950 [ 41.711522] split_vma+0xc6/0x110 [ 41.712015] mprotect_fixup+0x8d2/0xb30 [ 41.712507] do_mprotect_pkey+0x87e/0xd40 [ 41.713039] __x64_sys_mprotect+0x78/0xc0 [ 41.713627] do_syscall_64+0x3f/0x90 [ 41.714178] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.714905] [ 41.715150] Freed by task 212: [ 41.715595] kasan_save_stack+0x22/0x50 [ 41.716142] kasan_set_track+0x25/0x30 [ 41.716637] kasan_save_free_info+0x2b/0x50 [ 41.717209] __kasan_slab_free+0x10a/0x190 [ 41.717826] kmem_cache_free+0x10d/0x4d0 [ 41.718406] rcu_core+0x8c8/0x2860 [ 41.719011] __do_softirq+0x1b7/0x7d4 [ 41.719547] [ 41.719790] Last potentially related work creation: [ 41.720449] kasan_save_stack+0x22/0x50 [ 41.721009] __kasan_record_aux_stack+0x8e/0xa0 [ 41.721571] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.722282] remove_vma+0x139/0x170 [ 41.722789] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.723412] do_vmi_munmap+0x1f1/0x2b0 [ 41.723961] __vm_munmap+0x138/0x3a0 [ 41.724417] __x64_sys_munmap+0x59/0x80 [ 41.724915] do_syscall_64+0x3f/0x90 [ 41.725445] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.726144] [ 41.726357] The buggy address belongs to the object at ffff8880199e8658 [ 41.726357] which belongs to the cache vm_area_struct of size 168 [ 41.727805] The buggy address is located 88 bytes inside of [ 41.727805] freed 168-byte region [ffff8880199e8658, ffff8880199e8700) [ 41.729196] [ 41.729408] The buggy address belongs to the physical page: [ 41.730071] page:00000000bfb62f17 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x199e8 [ 41.731156] memcg:ffff8880199f1101 [ 41.731576] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.732217] page_type: 0xffffffff() [ 41.732660] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.733560] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880199f1101 [ 41.734482] page dumped because: kasan: bad access detected [ 41.735139] [ 41.735349] Memory state around the buggy address: [ 41.735916] ffff8880199e8580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.736764] ffff8880199e8600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 41.737624] >ffff8880199e8680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.738477] ^ [ 41.739054] ffff8880199e8700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 41.739903] ffff8880199e8780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 41.740763] ================================================================== [ 41.741760] Disabling lock debugging due to kernel taint [ 44.072748] BUG: Bad rss-counter state mm:000000005cdf0fde type:MM_FILEPAGES val:33 [ 44.073960] BUG: Bad rss-counter state mm:000000005cdf0fde type:MM_ANONPAGES val:22 [ 44.475770] BUG: Bad rss-counter state mm:00000000b0c5b277 type:MM_FILEPAGES val:33 [ 44.476743] BUG: Bad rss-counter state mm:00000000b0c5b277 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8756' (ECDSA) to the list of known hosts. 2023/06/19 16:01:40 fuzzer started 2023/06/19 16:01:40 dialing manager at localhost:44161 2023/06/19 16:01:40 checking machine... 2023/06/19 16:01:40 checking revisions... [ 45.202236] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:01:40 testing simple program... [ 45.252658] cgroup: Unknown subsys name 'net' [ 45.315990] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:01:30 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888018ced028 RCX=ffff888018ced028 RDX=0000000080150014 RSI=ffff888018ced028 RDI=ffff8880087b6500 RBP=ffff8880158afc88 RSP=ffff8880158afbf0 R8 =0000000080150013 R9 =0000000000000000 R10=ffffea0000633b00 R11=000000008010000c R12=ffffea0000633b00 R13=ffff888018cedd60 R14=0000000080150013 R15=ffff8880087b6500 RIP=ffffffff818094f2 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 00007f8ded447900 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=00007f8ded9fc650 CR3=0000000009636000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801762fa3a RCX=ffffffff818c216e RDX=ffff888015a351c0 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff88801762f950 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000001 R13=ffff88800caf1680 R14=0000000000000041 R15=dffffc0000000000 RIP=ffffffff814c07e0 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 00007f1af9349700 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=00007f1949b6e580 CR3=000000000f748000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=e8dd70cfaea39e7e00000000000ae988 XMM05=94ba6317de2860f20000000000136c68 XMM06=dfcdbad4f1609c370000000000135b00 XMM07=fb795ef6d657705600000000001266d8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000