syzkaller login: [ 76.285911] BUG: Bad rss-counter state mm:000000000807069e type:MM_FILEPAGES val:33 [ 76.287485] BUG: Bad rss-counter state mm:000000000807069e type:MM_ANONPAGES val:22 [ 76.448268] ================================================================== [ 76.449168] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 76.450093] Read of size 8 at addr ffff88800db21d08 by task sshd/221 [ 76.450849] [ 76.451071] CPU: 1 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 76.452180] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 76.453146] Call Trace: [ 76.453469] [ 76.453749] dump_stack_lvl+0x91/0xf0 [ 76.454238] print_report+0xcc/0x620 [ 76.454715] ? __virt_addr_valid+0x102/0x340 [ 76.455271] ? vma_interval_tree_remove+0xc75/0xec0 [ 76.455878] ? vma_interval_tree_remove+0xc75/0xec0 [ 76.456493] kasan_report+0xbe/0xf0 [ 76.456962] ? vma_interval_tree_remove+0xc75/0xec0 [ 76.457571] vma_interval_tree_remove+0xc75/0xec0 [ 76.458200] vma_prepare+0xc54/0x11a0 [ 76.458694] __split_vma+0x5af/0x950 [ 76.459180] ? __pfx___split_vma+0x10/0x10 [ 76.459721] ? find_held_lock+0x2c/0x110 [ 76.460257] do_vmi_align_munmap+0x2ba/0x11f0 [ 76.460842] ? lock_is_held_type+0x9f/0x120 [ 76.461392] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 76.462029] ? mtree_range_walk+0x632/0x900 [ 76.462595] ? mas_walk+0x5c7/0x7c0 [ 76.463089] do_vmi_munmap+0x1f1/0x2b0 [ 76.463599] mmap_region+0x1f9/0x2660 [ 76.464094] ? vm_mmap_pgoff+0x15c/0x3a0 [ 76.464618] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 76.465347] ? __pfx_lock_acquire+0x10/0x10 [ 76.465890] ? __pfx_mmap_region+0x10/0x10 [ 76.466454] ? security_mmap_addr+0x7d/0xa0 [ 76.467003] ? get_unmapped_area+0x1f5/0x3f0 [ 76.467566] do_mmap+0x854/0xf00 [ 76.468018] vm_mmap_pgoff+0x1a6/0x3a0 [ 76.468527] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 76.469099] ksys_mmap_pgoff+0x3af/0x500 [ 76.469612] do_syscall_64+0x3f/0x90 [ 76.470114] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 76.470780] RIP: 0033:0x7f8ca5dfad82 [ 76.471251] 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 [ 76.473458] RSP: 002b:00007ffe14238848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 76.474401] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8ca5dfad82 [ 76.475269] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8ca5234000 [ 76.476146] RBP: 00007f8ca5234000 R08: 0000000000000009 R09: 0000000000001000 [ 76.477022] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557843380ec0 [ 76.477908] R13: 00007ffe14238860 R14: 00007ffe14238890 R15: 00007ffe14238bf0 [ 76.478821] [ 76.479128] [ 76.479349] Allocated by task 214: [ 76.479799] kasan_save_stack+0x22/0x50 [ 76.480325] kasan_set_track+0x25/0x30 [ 76.480833] __kasan_slab_alloc+0x59/0x70 [ 76.481371] kmem_cache_alloc+0x16b/0x370 [ 76.481900] vm_area_dup+0x20/0x160 [ 76.482370] __split_vma+0x170/0x950 [ 76.482859] split_vma+0xc6/0x110 [ 76.483313] mprotect_fixup+0x8d2/0xb30 [ 76.483871] do_mprotect_pkey+0x87e/0xd40 [ 76.484450] __x64_sys_mprotect+0x78/0xc0 [ 76.484996] do_syscall_64+0x3f/0x90 [ 76.485483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 76.486152] [ 76.486374] Freed by task 202: [ 76.486776] kasan_save_stack+0x22/0x50 [ 76.487289] kasan_set_track+0x25/0x30 [ 76.487789] kasan_save_free_info+0x2b/0x50 [ 76.488296] __kasan_slab_free+0x10a/0x190 [ 76.488799] kmem_cache_free+0x10d/0x4d0 [ 76.489282] rcu_core+0x8c8/0x2860 [ 76.489706] __do_softirq+0x1b7/0x7d4 [ 76.490168] [ 76.490371] Last potentially related work creation: [ 76.490928] kasan_save_stack+0x22/0x50 [ 76.491405] __kasan_record_aux_stack+0x8e/0xa0 [ 76.491949] __call_rcu_common.constprop.0+0x6a/0xb90 [ 76.492561] remove_vma+0x139/0x170 [ 76.492989] do_vmi_align_munmap+0xd4a/0x11f0 [ 76.493518] do_vmi_munmap+0x1f1/0x2b0 [ 76.493975] __vm_munmap+0x138/0x3a0 [ 76.494435] __x64_sys_munmap+0x59/0x80 [ 76.494904] do_syscall_64+0x3f/0x90 [ 76.495352] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 76.495956] [ 76.496164] Second to last potentially related work creation: [ 76.496806] kasan_save_stack+0x22/0x50 [ 76.497294] __kasan_record_aux_stack+0x8e/0xa0 [ 76.497863] __call_rcu_common.constprop.0+0x6a/0xb90 [ 76.498514] remove_vma+0x139/0x170 [ 76.498963] do_vmi_align_munmap+0xd4a/0x11f0 [ 76.499522] do_vmi_munmap+0x1f1/0x2b0 [ 76.500006] mmap_region+0x1f9/0x2660 [ 76.500484] do_mmap+0x854/0xf00 [ 76.500909] vm_mmap_pgoff+0x1a6/0x3a0 [ 76.501392] ksys_mmap_pgoff+0x3af/0x500 [ 76.501893] do_syscall_64+0x3f/0x90 [ 76.502375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 76.503006] [ 76.503221] The buggy address belongs to the object at ffff88800db21cb0 [ 76.503221] which belongs to the cache vm_area_struct of size 168 [ 76.504689] The buggy address is located 88 bytes inside of [ 76.504689] freed 168-byte region [ffff88800db21cb0, ffff88800db21d58) [ 76.506090] [ 76.506303] The buggy address belongs to the physical page: [ 76.506957] page:00000000edbdc365 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb21 [ 76.508031] memcg:ffff88800de09a01 [ 76.508461] flags: 0x100000000000200(slab|node=0|zone=1) [ 76.509101] page_type: 0xffffffff() [ 76.509553] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 76.510478] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de09a01 [ 76.511372] page dumped because: kasan: bad access detected [ 76.512034] [ 76.512245] Memory state around the buggy address: [ 76.512818] ffff88800db21c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 76.513668] ffff88800db21c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 76.514516] >ffff88800db21d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 76.515351] ^ [ 76.515783] ffff88800db21d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 76.516631] ffff88800db21e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 76.517459] ================================================================== [ 76.518581] Disabling lock debugging due to kernel taint [ 78.486947] BUG: Bad rss-counter state mm:00000000675ae15a type:MM_FILEPAGES val:33 [ 78.488043] BUG: Bad rss-counter state mm:00000000675ae15a type:MM_ANONPAGES val:22 [ 79.040105] BUG: Bad rss-counter state mm:00000000d9815e5f type:MM_FILEPAGES val:33 [ 79.041265] BUG: Bad rss-counter state mm:00000000d9815e5f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37521' (ECDSA) to the list of known hosts. 2023/06/20 07:03:45 fuzzer started 2023/06/20 07:03:45 dialing manager at localhost:44161 2023/06/20 07:03:45 checking machine... 2023/06/20 07:03:45 checking revisions... [ 79.664653] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:03:46 testing simple program... [ 79.715920] cgroup: Unknown subsys name 'net' [ 79.761209] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:02:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800f706780 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff888008dbfa00 RSP=ffff888008d7fcd0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=ffff8880087b6780 R13=ffffea00003dc180 R14=ffffffff8186b9c5 R15=ffff888008dbfa00 RIP=ffffffff8450bdd4 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=00007fb5a07e6650 CR3=000000000d46a000 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=2035343a33303a3730203032206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a33303a3730203032 XMM08=65747379733a755f6d65747379733d6a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806c400000 RBX=000000006bda976e RCX=ffff88806c94bb70 RDX=0000000000000007 RSI=0000000000000002 RDI=000000004dd5ca1b RBP=ffff8880101e0620 RSP=ffff88806cf09b20 R8 =00000000406c657a R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff88806cf09b88 R15=0000000000000007 RIP=ffffffff82270f13 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 00007f2c17465900 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=00007f2c16930000 CR3=0000000013970000 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=4d79fc7cf51a21a33a43a542532f6b79 XMM02=0000000000126d10eff9b2d0a8fce9cb XMM03=0000000000126de02c67c8bc2e329bc3 XMM04=a31edc0e442c35e800000000000ae988 XMM05=c45bf39011ea31c70000000000140640 XMM06=e5b20dd8fe01bdb8000000000013f3e0 XMM07=fb795ef6d6577056000000000012df50 XMM08=2c67c8bc2e329bc30000000000126d80 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000