syzkaller login: [ 31.286391] BUG: Bad rss-counter state mm:0000000023355e69 type:MM_FILEPAGES val:33 [ 31.287545] BUG: Bad rss-counter state mm:0000000023355e69 type:MM_ANONPAGES val:22 [ 31.446959] ================================================================== [ 31.447863] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.448775] Read of size 8 at addr ffff888019c56798 by task sshd/219 [ 31.449527] [ 31.449879] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.450739] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.451711] Call Trace: [ 31.452033] [ 31.452306] dump_stack_lvl+0x91/0xf0 [ 31.452784] print_report+0xcc/0x620 [ 31.453279] ? __virt_addr_valid+0x102/0x340 [ 31.453847] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.454445] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.455044] kasan_report+0xbe/0xf0 [ 31.455500] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.456105] vma_interval_tree_remove+0xc75/0xec0 [ 31.456694] vma_prepare+0xc54/0x11a0 [ 31.457166] __split_vma+0x5af/0x950 [ 31.457626] ? __pfx___split_vma+0x10/0x10 [ 31.458139] ? find_held_lock+0x2c/0x110 [ 31.458670] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.459213] ? lock_is_held_type+0x9f/0x120 [ 31.459740] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.460323] ? mtree_range_walk+0x632/0x900 [ 31.460863] ? mas_walk+0x5c7/0x7c0 [ 31.461335] do_vmi_munmap+0x1f1/0x2b0 [ 31.461815] mmap_region+0x1f9/0x2660 [ 31.462284] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.462788] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.463490] ? __pfx_lock_acquire+0x10/0x10 [ 31.464009] ? __pfx_mmap_region+0x10/0x10 [ 31.464532] ? security_mmap_addr+0x7d/0xa0 [ 31.465057] ? get_unmapped_area+0x1f5/0x3f0 [ 31.465605] do_mmap+0x854/0xf00 [ 31.466033] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.466520] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.467073] ksys_mmap_pgoff+0x3af/0x500 [ 31.467573] do_syscall_64+0x3f/0x90 [ 31.468038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.468672] RIP: 0033:0x7f4a4b0ddd82 [ 31.469129] 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 [ 31.471209] RSP: 002b:00007fffc4009f98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.472096] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4a4b0ddd82 [ 31.472919] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4a4a517000 [ 31.473760] RBP: 00007f4a4a517000 R08: 0000000000000009 R09: 0000000000001000 [ 31.474588] R10: 0000000000000812 R11: 0000000000000206 R12: 00005560121cdf60 [ 31.475411] R13: 00007fffc4009fb0 R14: 00007fffc4009fe0 R15: 00007fffc400a340 [ 31.476243] [ 31.476531] [ 31.476749] Allocated by task 212: [ 31.477179] kasan_save_stack+0x22/0x50 [ 31.477678] kasan_set_track+0x25/0x30 [ 31.478152] __kasan_slab_alloc+0x59/0x70 [ 31.478672] kmem_cache_alloc+0x16b/0x370 [ 31.479174] vm_area_dup+0x20/0x160 [ 31.479622] __split_vma+0x170/0x950 [ 31.480077] split_vma+0xc6/0x110 [ 31.480507] mprotect_fixup+0x8d2/0xb30 [ 31.481000] do_mprotect_pkey+0x87e/0xd40 [ 31.481515] __x64_sys_mprotect+0x78/0xc0 [ 31.482022] do_syscall_64+0x3f/0x90 [ 31.482478] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.483102] [ 31.483310] Freed by task 212: [ 31.483697] kasan_save_stack+0x22/0x50 [ 31.484184] kasan_set_track+0x25/0x30 [ 31.484666] kasan_save_free_info+0x2b/0x50 [ 31.485204] __kasan_slab_free+0x10a/0x190 [ 31.485735] kmem_cache_free+0x10d/0x4d0 [ 31.486225] rcu_core+0x8c8/0x2860 [ 31.486660] __do_softirq+0x1b7/0x7d4 [ 31.487128] [ 31.487338] Last potentially related work creation: [ 31.487918] kasan_save_stack+0x22/0x50 [ 31.488411] __kasan_record_aux_stack+0x8e/0xa0 [ 31.488971] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.489617] remove_vma+0x139/0x170 [ 31.490063] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.490609] do_vmi_munmap+0x1f1/0x2b0 [ 31.491151] __vm_munmap+0x138/0x3a0 [ 31.491606] __x64_sys_munmap+0x59/0x80 [ 31.492092] do_syscall_64+0x3f/0x90 [ 31.492559] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.493209] [ 31.493423] The buggy address belongs to the object at ffff888019c56740 [ 31.493423] which belongs to the cache vm_area_struct of size 168 [ 31.494872] The buggy address is located 88 bytes inside of [ 31.494872] freed 168-byte region [ffff888019c56740, ffff888019c567e8) [ 31.496247] [ 31.496458] The buggy address belongs to the physical page: [ 31.497107] page:00000000ab723b51 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c56 [ 31.498197] memcg:ffff888015ebfe01 [ 31.498619] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.499249] page_type: 0xffffffff() [ 31.499693] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.500603] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015ebfe01 [ 31.501499] page dumped because: kasan: bad access detected [ 31.502148] [ 31.502361] Memory state around the buggy address: [ 31.502943] ffff888019c56680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.503785] ffff888019c56700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.504627] >ffff888019c56780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.505479] ^ [ 31.505972] ffff888019c56800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.506809] ffff888019c56880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.507660] ================================================================== [ 31.508614] Disabling lock debugging due to kernel taint [ 33.219407] BUG: Bad rss-counter state mm:0000000049e87790 type:MM_FILEPAGES val:33 [ 33.220064] BUG: Bad rss-counter state mm:0000000049e87790 type:MM_ANONPAGES val:22 [ 33.702928] BUG: Bad rss-counter state mm:0000000049ed2e61 type:MM_FILEPAGES val:33 [ 33.703908] BUG: Bad rss-counter state mm:0000000049ed2e61 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29370' (ECDSA) to the list of known hosts. 2023/06/19 18:35:31 fuzzer started 2023/06/19 18:35:31 dialing manager at localhost:44161 2023/06/19 18:35:31 checking machine... 2023/06/19 18:35:31 checking revisions... [ 34.434651] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:35:31 testing simple program... [ 34.477465] cgroup: Unknown subsys name 'net' [ 34.528654] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:35:30 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888008d71bc0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88806ce39758 RBP=ffff88806ce395c0 RSP=ffff888008d87a78 R8 =0000000000008800 R9 =ffff88806ce3965c R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=0000000000000009 R14=dffffc0000000000 R15=ffff88806ce39fe8 RIP=ffffffff8126092c RFL=00000046 [---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 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=00007fb4e85ce650 CR3=0000000017eaa000 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=2031333a35333a3831203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a35333a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a50 RCX=0000000000000001 RDX=1ffff1100d9e1355 RSI=ffff88800f607f48 RDI=ffff88806cf09a50 RBP=ffff88806cf09aa8 RSP=ffff88806cf09a38 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88806cf09b18 R13=0000000000000000 R14=ffff888015c91b40 R15=ffff888008deb300 RIP=ffffffff8113038e 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 00007fb4e8019900 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=00007fb4e85d10b0 CR3=0000000006806000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000