syzkaller login: [ 42.419116] BUG: Bad rss-counter state mm:000000002757bf1d type:MM_FILEPAGES val:33 [ 42.420296] BUG: Bad rss-counter state mm:000000002757bf1d type:MM_ANONPAGES val:22 [ 42.513075] ================================================================== [ 42.513967] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.514931] Read of size 8 at addr ffff888016dc96b0 by task sshd/219 [ 42.515694] [ 42.515918] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.516855] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.517811] Call Trace: [ 42.518183] [ 42.518470] dump_stack_lvl+0x91/0xf0 [ 42.518963] print_report+0xcc/0x620 [ 42.519443] ? __virt_addr_valid+0x102/0x340 [ 42.519990] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.520601] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.521218] kasan_report+0xbe/0xf0 [ 42.521688] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.522314] vma_interval_tree_remove+0xc75/0xec0 [ 42.522911] vma_prepare+0xc54/0x11a0 [ 42.523412] __split_vma+0x5af/0x950 [ 42.523895] ? __pfx___split_vma+0x10/0x10 [ 42.524442] ? find_held_lock+0x2c/0x110 [ 42.524978] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.525562] ? lock_is_held_type+0x9f/0x120 [ 42.526123] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.526751] ? mtree_range_walk+0x632/0x900 [ 42.527320] ? mas_walk+0x5c7/0x7c0 [ 42.527832] do_vmi_munmap+0x1f1/0x2b0 [ 42.528335] mmap_region+0x1f9/0x2660 [ 42.528836] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.529359] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.530115] ? __pfx_lock_acquire+0x10/0x10 [ 42.530674] ? __pfx_mmap_region+0x10/0x10 [ 42.531223] ? security_mmap_addr+0x7d/0xa0 [ 42.531777] ? get_unmapped_area+0x1f5/0x3f0 [ 42.532343] do_mmap+0x854/0xf00 [ 42.532800] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.533308] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.533885] ksys_mmap_pgoff+0x3af/0x500 [ 42.534426] do_syscall_64+0x3f/0x90 [ 42.534923] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.535597] RIP: 0033:0x7f56bedafd82 [ 42.536067] 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 [ 42.538313] RSP: 002b:00007ffc082fb4d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.539252] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f56bedafd82 [ 42.540142] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f56be1e9000 [ 42.541024] RBP: 00007f56be1e9000 R08: 0000000000000009 R09: 0000000000001000 [ 42.541903] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ba0ed8cb20 [ 42.542790] R13: 00007ffc082fb4f0 R14: 00007ffc082fb520 R15: 00007ffc082fb880 [ 42.543682] [ 42.543986] [ 42.544208] Allocated by task 212: [ 42.544650] kasan_save_stack+0x22/0x50 [ 42.545173] kasan_set_track+0x25/0x30 [ 42.545681] __kasan_slab_alloc+0x59/0x70 [ 42.546237] kmem_cache_alloc+0x16b/0x370 [ 42.546775] vm_area_dup+0x20/0x160 [ 42.547240] __split_vma+0x170/0x950 [ 42.547725] split_vma+0xc6/0x110 [ 42.548178] mprotect_fixup+0x8d2/0xb30 [ 42.548699] do_mprotect_pkey+0x87e/0xd40 [ 42.549238] __x64_sys_mprotect+0x78/0xc0 [ 42.549770] do_syscall_64+0x3f/0x90 [ 42.550260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.550923] [ 42.551145] Freed by task 212: [ 42.551551] kasan_save_stack+0x22/0x50 [ 42.552067] kasan_set_track+0x25/0x30 [ 42.552575] kasan_save_free_info+0x2b/0x50 [ 42.553134] __kasan_slab_free+0x10a/0x190 [ 42.553686] kmem_cache_free+0x10d/0x4d0 [ 42.554231] rcu_core+0x8c8/0x2860 [ 42.554685] __do_softirq+0x1b7/0x7d4 [ 42.555177] [ 42.555398] Last potentially related work creation: [ 42.556004] kasan_save_stack+0x22/0x50 [ 42.556523] __kasan_record_aux_stack+0x8e/0xa0 [ 42.557114] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.557773] remove_vma+0x139/0x170 [ 42.558264] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.558841] do_vmi_munmap+0x1f1/0x2b0 [ 42.559340] __vm_munmap+0x138/0x3a0 [ 42.559821] __x64_sys_munmap+0x59/0x80 [ 42.560335] do_syscall_64+0x3f/0x90 [ 42.560822] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.561485] [ 42.561708] The buggy address belongs to the object at ffff888016dc9658 [ 42.561708] which belongs to the cache vm_area_struct of size 168 [ 42.563253] The buggy address is located 88 bytes inside of [ 42.563253] freed 168-byte region [ffff888016dc9658, ffff888016dc9700) [ 42.564718] [ 42.564940] The buggy address belongs to the physical page: [ 42.565624] page:00000000e23f9967 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16dc9 [ 42.566791] memcg:ffff88800e32e801 [ 42.567227] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.567894] page_type: 0xffffffff() [ 42.568359] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 42.569309] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e32e801 [ 42.570253] page dumped because: kasan: bad access detected [ 42.570943] [ 42.571173] Memory state around the buggy address: [ 42.571780] ffff888016dc9580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.572668] ffff888016dc9600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 42.573557] >ffff888016dc9680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.574455] ^ [ 42.575053] ffff888016dc9700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 42.575938] ffff888016dc9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 42.576825] ================================================================== [ 42.577832] Disabling lock debugging due to kernel taint [ 44.535316] BUG: Bad rss-counter state mm:000000009fb89a7f type:MM_FILEPAGES val:33 [ 44.536467] BUG: Bad rss-counter state mm:000000009fb89a7f type:MM_ANONPAGES val:22 [ 44.902969] BUG: Bad rss-counter state mm:0000000022c3c232 type:MM_FILEPAGES val:33 [ 44.903859] BUG: Bad rss-counter state mm:0000000022c3c232 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6084' (ECDSA) to the list of known hosts. 2023/06/19 16:38:34 fuzzer started 2023/06/19 16:38:34 dialing manager at localhost:44161 2023/06/19 16:38:34 checking machine... 2023/06/19 16:38:34 checking revisions... [ 45.608021] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:38:34 testing simple program... [ 45.661559] cgroup: Unknown subsys name 'net' [ 45.697976] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:38:22 Registers: info registers vcpu 0 RAX=ffffffff860d68fb RBX=0000000000000001 RCX=ffffffff860d68f6 RDX=0000000000000000 RSI=1ffffffff0c1ad1f RDI=ffffffff85dbc1cc RBP=ffff8880166c7578 RSP=ffff8880166c74b0 R8 =ffffffff860d68c0 R9 =ffff8880166c7560 R10=0000000000038001 R11=0000000000010b7e R12=ffff8880166c7580 R13=ffff8880166c7568 R14=ffff8880166c7561 R15=ffff8880166c7520 RIP=ffffffff81130a5b RFL=00000212 [----A--] 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 00007f4e632a4900 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=00007f4e6385b618 CR3=0000000016476000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007fdc9b12ca90 CR3=000000000f24e000 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=2034333a38333a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a38333a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000