syzkaller login: [ 30.906515] BUG: Bad rss-counter state mm:0000000067725d9e type:MM_FILEPAGES val:33 [ 30.907711] BUG: Bad rss-counter state mm:0000000067725d9e type:MM_ANONPAGES val:22 [ 30.947678] ================================================================== [ 30.948999] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.950138] Read of size 8 at addr ffff88800dea2058 by task sshd/220 [ 30.950944] [ 30.951161] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.952210] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.953297] Call Trace: [ 30.953618] [ 30.953913] dump_stack_lvl+0x91/0xf0 [ 30.954411] print_report+0xcc/0x620 [ 30.954898] ? __virt_addr_valid+0x102/0x340 [ 30.955455] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.956076] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.956726] kasan_report+0xbe/0xf0 [ 30.957211] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.957830] vma_interval_tree_remove+0xc75/0xec0 [ 30.958438] vma_prepare+0xc54/0x11a0 [ 30.958925] __split_vma+0x5af/0x950 [ 30.959405] ? __pfx___split_vma+0x10/0x10 [ 30.959939] ? find_held_lock+0x2c/0x110 [ 30.960472] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.961039] ? lock_is_held_type+0x9f/0x120 [ 30.961576] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.962192] ? mtree_range_walk+0x632/0x900 [ 30.962748] ? mas_walk+0x5c7/0x7c0 [ 30.963227] do_vmi_munmap+0x1f1/0x2b0 [ 30.963720] mmap_region+0x1f9/0x2660 [ 30.964212] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.964736] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.965457] ? __pfx_lock_acquire+0x10/0x10 [ 30.965996] ? __pfx_mmap_region+0x10/0x10 [ 30.966536] ? security_mmap_addr+0x7d/0xa0 [ 30.967074] ? get_unmapped_area+0x1f5/0x3f0 [ 30.967637] do_mmap+0x854/0xf00 [ 30.968078] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.968591] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.969170] ksys_mmap_pgoff+0x3af/0x500 [ 30.969678] do_syscall_64+0x3f/0x90 [ 30.970158] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.970812] RIP: 0033:0x7fc5b6b0bd82 [ 30.971280] 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 [ 30.973435] RSP: 002b:00007ffc8ead28e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.974353] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc5b6b0bd82 [ 30.975220] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc5b5f45000 [ 30.976092] RBP: 00007fc5b5f45000 R08: 0000000000000009 R09: 0000000000001000 [ 30.976972] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556ceb2fbb20 [ 30.977824] R13: 00007ffc8ead2900 R14: 00007ffc8ead2930 R15: 00007ffc8ead2c90 [ 30.978679] [ 30.978970] [ 30.979189] Allocated by task 213: [ 30.979623] kasan_save_stack+0x22/0x50 [ 30.980146] kasan_set_track+0x25/0x30 [ 30.980659] __kasan_slab_alloc+0x59/0x70 [ 30.981209] kmem_cache_alloc+0x16b/0x370 [ 30.981725] vm_area_dup+0x20/0x160 [ 30.982189] __split_vma+0x170/0x950 [ 30.982671] split_vma+0xc6/0x110 [ 30.983115] mprotect_fixup+0x8d2/0xb30 [ 30.983632] do_mprotect_pkey+0x87e/0xd40 [ 30.984160] __x64_sys_mprotect+0x78/0xc0 [ 30.984706] do_syscall_64+0x3f/0x90 [ 30.985196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.985839] [ 30.986058] Freed by task 213: [ 30.986454] kasan_save_stack+0x22/0x50 [ 30.986963] kasan_set_track+0x25/0x30 [ 30.987469] kasan_save_free_info+0x2b/0x50 [ 30.988005] __kasan_slab_free+0x10a/0x190 [ 30.988673] kmem_cache_free+0x10d/0x4d0 [ 30.989201] rcu_core+0x8c8/0x2860 [ 30.989660] __do_softirq+0x1b7/0x7d4 [ 30.990153] [ 30.990367] Last potentially related work creation: [ 30.990957] kasan_save_stack+0x22/0x50 [ 30.991465] __kasan_record_aux_stack+0x8e/0xa0 [ 30.992051] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.992722] remove_vma+0x139/0x170 [ 30.993173] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.993743] do_vmi_munmap+0x1f1/0x2b0 [ 30.994239] __vm_munmap+0x138/0x3a0 [ 30.994724] __x64_sys_munmap+0x59/0x80 [ 30.995226] do_syscall_64+0x3f/0x90 [ 30.995718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.996375] [ 30.996610] Second to last potentially related work creation: [ 30.997293] kasan_save_stack+0x22/0x50 [ 30.997802] __kasan_record_aux_stack+0x8e/0xa0 [ 30.998391] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.999044] remove_vma+0x139/0x170 [ 30.999500] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.000075] do_vmi_munmap+0x1f1/0x2b0 [ 31.000593] mmap_region+0x1f9/0x2660 [ 31.001073] do_mmap+0x854/0xf00 [ 31.001521] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.002016] ksys_mmap_pgoff+0x7d/0x500 [ 31.002522] do_syscall_64+0x3f/0x90 [ 31.003005] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.003665] [ 31.003885] The buggy address belongs to the object at ffff88800dea2000 [ 31.003885] which belongs to the cache vm_area_struct of size 168 [ 31.005378] The buggy address is located 88 bytes inside of [ 31.005378] freed 168-byte region [ffff88800dea2000, ffff88800dea20a8) [ 31.006799] [ 31.007019] The buggy address belongs to the physical page: [ 31.007673] page:000000009e91c615 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdea2 [ 31.008778] memcg:ffff888014778201 [ 31.009208] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.009929] page_type: 0xffffffff() [ 31.010395] raw: 0100000000000200 ffff88800879fc80 ffffea000031ea80 dead000000000005 [ 31.011336] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014778201 [ 31.012253] page dumped because: kasan: bad access detected [ 31.012954] [ 31.013174] Memory state around the buggy address: [ 31.013776] ffff88800dea1f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.014656] ffff88800dea1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.015527] >ffff88800dea2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.016412] ^ [ 31.017158] ffff88800dea2080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 31.018035] ffff88800dea2100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.018919] ================================================================== [ 31.019874] Disabling lock debugging due to kernel taint [ 32.893871] BUG: Bad rss-counter state mm:00000000ae82b39c type:MM_FILEPAGES val:33 [ 32.894742] BUG: Bad rss-counter state mm:00000000ae82b39c type:MM_ANONPAGES val:22 [ 33.353121] BUG: Bad rss-counter state mm:00000000cc664468 type:MM_FILEPAGES val:33 [ 33.354259] BUG: Bad rss-counter state mm:00000000cc664468 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52423' (ECDSA) to the list of known hosts. 2023/06/19 13:45:00 fuzzer started 2023/06/19 13:45:00 dialing manager at localhost:44161 2023/06/19 13:45:00 checking machine... 2023/06/19 13:45:00 checking revisions... [ 34.091492] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:45:00 testing simple program... [ 34.146442] cgroup: Unknown subsys name 'net' [ 34.201614] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:44:59 Registers: info registers vcpu 0 RAX=ffffffff863dc590 RBX=0000000000000001 RCX=ffffffff83868f57 RDX=0000000000000000 RSI=ffffffff863dc590 RDI=ffffffff85fbffac RBP=ffff8880165ff2b0 RSP=ffff8880165ff1d0 R8 =ffffffff863dc590 R9 =ffff8880165ff298 R10=0000000000038001 R11=0000000000091af6 R12=ffff8880165ff2b8 R13=ffff8880165ff2a0 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcbd RFL=00000282 [--S----] 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 00007f997e812900 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=00007f997edc9618 CR3=000000001cdb6000 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=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=ffff888008c58400 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=00007ff216f759a0 CR3=000000000c7fa000 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=dd92f49c75cb99ad0c45c613e67870f6 XMM02=2c67c8bc2e329bc3000000000011cc00 XMM03=fb795ef6d65770560000000000124140 XMM04=96fbfc00b6737fe300000000000ae988 XMM05=19e9129bd510f2350000000000134fc8 XMM06=23d5038aaa0f175d0000000000133e30 XMM07=e042d86d42eb936e00000000001243c0 XMM08=415e8eb8653f513c000000000011cc60 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000