syzkaller login: [ 38.806344] BUG: Bad rss-counter state mm:0000000062437ff4 type:MM_FILEPAGES val:33 [ 38.807516] BUG: Bad rss-counter state mm:0000000062437ff4 type:MM_ANONPAGES val:22 [ 38.979983] ================================================================== [ 38.981341] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.982677] Read of size 8 at addr ffff88800e754968 by task sshd/220 [ 38.983723] [ 38.984012] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.985145] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.986426] Call Trace: [ 38.986850] [ 38.987209] dump_stack_lvl+0x91/0xf0 [ 38.987835] print_report+0xcc/0x620 [ 38.988455] ? __virt_addr_valid+0x102/0x340 [ 38.989228] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.990020] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.990825] kasan_report+0xbe/0xf0 [ 38.991445] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.992255] vma_interval_tree_remove+0xc75/0xec0 [ 38.993024] vma_prepare+0xc54/0x11a0 [ 38.993658] __split_vma+0x5af/0x950 [ 38.994263] ? __pfx___split_vma+0x10/0x10 [ 38.994966] ? find_held_lock+0x2c/0x110 [ 38.995652] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.996378] ? lock_is_held_type+0x9f/0x120 [ 38.997089] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.997909] ? mtree_range_walk+0x632/0x900 [ 38.998610] ? mas_walk+0x5c7/0x7c0 [ 38.999219] do_vmi_munmap+0x1f1/0x2b0 [ 38.999860] mmap_region+0x1f9/0x2660 [ 39.000481] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.001151] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.002088] ? __pfx_lock_acquire+0x10/0x10 [ 39.002772] ? __pfx_mmap_region+0x10/0x10 [ 39.003473] ? security_mmap_addr+0x7d/0xa0 [ 39.004164] ? get_unmapped_area+0x1f5/0x3f0 [ 39.004894] do_mmap+0x854/0xf00 [ 39.005471] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.006115] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.006839] ksys_mmap_pgoff+0x3af/0x500 [ 39.007499] do_syscall_64+0x3f/0x90 [ 39.008121] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.008960] RIP: 0033:0x7f390b688d82 [ 39.009589] 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 [ 39.012350] RSP: 002b:00007ffdb5d5fd58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.013540] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f390b688d82 [ 39.014649] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f390aac2000 [ 39.015773] RBP: 00007f390aac2000 R08: 0000000000000009 R09: 0000000000001000 [ 39.016882] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f01ed04ec0 [ 39.018008] R13: 00007ffdb5d5fd70 R14: 00007ffdb5d5fda0 R15: 00007ffdb5d60100 [ 39.019133] [ 39.019505] [ 39.019785] Allocated by task 213: [ 39.020347] kasan_save_stack+0x22/0x50 [ 39.020997] kasan_set_track+0x25/0x30 [ 39.021646] __kasan_slab_alloc+0x59/0x70 [ 39.022322] kmem_cache_alloc+0x16b/0x370 [ 39.022977] vm_area_dup+0x20/0x160 [ 39.023557] __split_vma+0x170/0x950 [ 39.024229] split_vma+0xc6/0x110 [ 39.024794] mprotect_fixup+0x8d2/0xb30 [ 39.025463] do_mprotect_pkey+0x87e/0xd40 [ 39.026130] __x64_sys_mprotect+0x78/0xc0 [ 39.026808] do_syscall_64+0x3f/0x90 [ 39.027417] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.028242] [ 39.028514] Freed by task 210: [ 39.029024] kasan_save_stack+0x22/0x50 [ 39.029676] kasan_set_track+0x25/0x30 [ 39.030324] kasan_save_free_info+0x2b/0x50 [ 39.031005] __kasan_slab_free+0x10a/0x190 [ 39.031677] kmem_cache_free+0x10d/0x4d0 [ 39.032339] rcu_core+0x8c8/0x2860 [ 39.032926] __do_softirq+0x1b7/0x7d4 [ 39.033463] [ 39.033687] Last potentially related work creation: [ 39.034280] kasan_save_stack+0x22/0x50 [ 39.034798] __kasan_record_aux_stack+0x8e/0xa0 [ 39.035379] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.036028] remove_vma+0x139/0x170 [ 39.036492] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.037061] do_vmi_munmap+0x1f1/0x2b0 [ 39.037586] __vm_munmap+0x138/0x3a0 [ 39.038062] __x64_sys_munmap+0x59/0x80 [ 39.038565] do_syscall_64+0x3f/0x90 [ 39.039045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.039700] [ 39.039922] Second to last potentially related work creation: [ 39.040613] kasan_save_stack+0x22/0x50 [ 39.041133] __kasan_record_aux_stack+0x8e/0xa0 [ 39.041720] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.042374] remove_vma+0x139/0x170 [ 39.042833] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.043402] do_vmi_munmap+0x1f1/0x2b0 [ 39.043900] mmap_region+0x1f9/0x2660 [ 39.044402] do_mmap+0x854/0xf00 [ 39.044867] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.045396] ksys_mmap_pgoff+0x3af/0x500 [ 39.045938] do_syscall_64+0x3f/0x90 [ 39.046440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.047114] [ 39.047347] The buggy address belongs to the object at ffff88800e754910 [ 39.047347] which belongs to the cache vm_area_struct of size 168 [ 39.048935] The buggy address is located 88 bytes inside of [ 39.048935] freed 168-byte region [ffff88800e754910, ffff88800e7549b8) [ 39.050466] [ 39.050701] The buggy address belongs to the physical page: [ 39.051408] page:00000000ad0c33d1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe754 [ 39.052563] memcg:ffff88800d70f101 [ 39.053033] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.053728] page_type: 0xffffffff() [ 39.054208] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 39.055195] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d70f101 [ 39.056156] page dumped because: kasan: bad access detected [ 39.056856] [ 39.057088] Memory state around the buggy address: [ 39.057729] ffff88800e754800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.058635] ffff88800e754880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.059547] >ffff88800e754900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.060447] ^ [ 39.061283] ffff88800e754980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 39.062195] ffff88800e754a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.063103] ================================================================== [ 39.064146] Disabling lock debugging due to kernel taint [ 41.655719] BUG: Bad rss-counter state mm:000000009c4236a6 type:MM_FILEPAGES val:33 [ 41.656946] BUG: Bad rss-counter state mm:000000009c4236a6 type:MM_ANONPAGES val:22 [ 42.153994] BUG: Bad rss-counter state mm:000000005e710b00 type:MM_FILEPAGES val:33 [ 42.155022] BUG: Bad rss-counter state mm:000000005e710b00 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15330' (ECDSA) to the list of known hosts. 2023/06/19 16:14:02 fuzzer started 2023/06/19 16:14:02 dialing manager at localhost:44161 2023/06/19 16:14:02 checking machine... 2023/06/19 16:14:02 checking revisions... [ 42.845366] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:14:03 testing simple program... [ 42.884035] cgroup: Unknown subsys name 'net' [ 42.932122] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:13:54 Registers: info registers vcpu 0 RAX=1ffffffff0c1ad1e RBX=0000000000000001 RCX=ffffffff860d68f6 RDX=dffffc0000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800e0bfab8 RSP=ffff88800e0bf9f0 R8 =ffffffff860d68fa R9 =ffff88800e0bfaa0 R10=0000000000038001 R11=0000000000010b7e R12=ffff88800e0bfac0 R13=ffff88800e0bfaa8 R14=ffff88800e0bfb08 R15=ffff88800e0bfa60 RIP=ffffffff81130b73 RFL=00000217 [----APC] 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 00007f6ccf748900 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=00007f6ccfcfd650 CR3=000000000ff7c000 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=ffffffff836382d7 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11002b00e9f RSI=ffffffff836382d7 RDI=ffff888015807568 RBP=ffff888015807538 RSP=ffff888015807498 R8 =0000000000000001 R9 =ffff8880158074e0 R10=0000000000038001 R11=000000000009a9d0 R12=ffff888015807568 R13=0000000000000000 R14=ffff88801426b680 R15=ffff88800dc65390 RIP=ffffffff813ad424 RFL=00000286 [--S--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 00007f1b57d1d900 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=00007f1b5723e010 CR3=0000000009832000 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=436cbe61533613ac8740dfd5c4ef0ace XMM02=000000000011f598eff9b2d0a8fce9cb XMM03=000000000011f6682c67c8bc2e329bc3 XMM04=f66786f61703523c00000000000ae988 XMM05=37cff767b55fbdb20000000000135d20 XMM06=19e9129bd510f2350000000000134be8 XMM07=fb795ef6d65770560000000000123cf0 XMM08=2c67c8bc2e329bc3000000000011f608 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000