syzkaller login: [ 61.839927] BUG: Bad rss-counter state mm:000000003c2f9e81 type:MM_FILEPAGES val:33 [ 61.841121] BUG: Bad rss-counter state mm:000000003c2f9e81 type:MM_ANONPAGES val:22 [ 62.002639] ================================================================== [ 62.003810] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.005041] Read of size 8 at addr ffff88800ccd5d08 by task sshd/222 [ 62.006179] [ 62.006467] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 62.007613] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.008723] Call Trace: [ 62.009056] [ 62.009356] dump_stack_lvl+0x91/0xf0 [ 62.009879] print_report+0xcc/0x620 [ 62.010391] ? __virt_addr_valid+0x102/0x340 [ 62.010980] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.011625] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.012279] kasan_report+0xbe/0xf0 [ 62.012776] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.013431] vma_interval_tree_remove+0xc75/0xec0 [ 62.014066] vma_prepare+0xc54/0x11a0 [ 62.014569] __split_vma+0x5af/0x950 [ 62.015060] ? __pfx___split_vma+0x10/0x10 [ 62.015612] ? find_held_lock+0x2c/0x110 [ 62.016162] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.016756] ? lock_is_held_type+0x9f/0x120 [ 62.017330] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.017985] ? mtree_range_walk+0x632/0x900 [ 62.018558] ? mas_walk+0x5c7/0x7c0 [ 62.019058] do_vmi_munmap+0x1f1/0x2b0 [ 62.019568] mmap_region+0x1f9/0x2660 [ 62.020072] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.020605] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.021353] ? __pfx_lock_acquire+0x10/0x10 [ 62.021912] ? __pfx_mmap_region+0x10/0x10 [ 62.022469] ? security_mmap_addr+0x7d/0xa0 [ 62.023024] ? get_unmapped_area+0x1f5/0x3f0 [ 62.023606] do_mmap+0x854/0xf00 [ 62.024065] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.024588] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.025177] ksys_mmap_pgoff+0x3af/0x500 [ 62.025722] do_syscall_64+0x3f/0x90 [ 62.026222] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.026903] RIP: 0033:0x7f3e8af00d82 [ 62.027378] 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 [ 62.029636] RSP: 002b:00007ffca156e5f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.030599] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3e8af00d82 [ 62.031486] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3e8a33a000 [ 62.032384] RBP: 00007f3e8a33a000 R08: 0000000000000009 R09: 0000000000001000 [ 62.033289] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555fbc7c2f70 [ 62.034190] R13: 00007ffca156e610 R14: 00007ffca156e640 R15: 00007ffca156e9a0 [ 62.035099] [ 62.035404] [ 62.035625] Allocated by task 215: [ 62.036075] kasan_save_stack+0x22/0x50 [ 62.036596] kasan_set_track+0x25/0x30 [ 62.037113] __kasan_slab_alloc+0x59/0x70 [ 62.037679] kmem_cache_alloc+0x16b/0x370 [ 62.038232] vm_area_dup+0x20/0x160 [ 62.038712] __split_vma+0x170/0x950 [ 62.039196] split_vma+0xc6/0x110 [ 62.039651] mprotect_fixup+0x8d2/0xb30 [ 62.040179] do_mprotect_pkey+0x87e/0xd40 [ 62.040725] __x64_sys_mprotect+0x78/0xc0 [ 62.041270] do_syscall_64+0x3f/0x90 [ 62.041773] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.042451] [ 62.042675] Freed by task 215: [ 62.043080] kasan_save_stack+0x22/0x50 [ 62.043604] kasan_set_track+0x25/0x30 [ 62.044120] kasan_save_free_info+0x2b/0x50 [ 62.044676] __kasan_slab_free+0x10a/0x190 [ 62.045231] kmem_cache_free+0x10d/0x4d0 [ 62.045772] rcu_core+0x8c8/0x2860 [ 62.046291] __do_softirq+0x1b7/0x7d4 [ 62.046793] [ 62.047018] Last potentially related work creation: [ 62.047640] kasan_save_stack+0x22/0x50 [ 62.048172] __kasan_record_aux_stack+0x8e/0xa0 [ 62.048773] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.049467] remove_vma+0x139/0x170 [ 62.049943] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.050529] do_vmi_munmap+0x1f1/0x2b0 [ 62.051046] __vm_munmap+0x138/0x3a0 [ 62.051536] __x64_sys_munmap+0x59/0x80 [ 62.052061] do_syscall_64+0x3f/0x90 [ 62.052556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.053229] [ 62.053462] Second to last potentially related work creation: [ 62.054179] kasan_save_stack+0x22/0x50 [ 62.054707] __kasan_record_aux_stack+0x8e/0xa0 [ 62.055312] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.055981] remove_vma+0x139/0x170 [ 62.056458] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.057042] do_vmi_munmap+0x1f1/0x2b0 [ 62.057569] mmap_region+0x1f9/0x2660 [ 62.058075] do_mmap+0x854/0xf00 [ 62.058526] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.059043] ksys_mmap_pgoff+0x3af/0x500 [ 62.059566] do_syscall_64+0x3f/0x90 [ 62.060065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.060738] [ 62.060966] The buggy address belongs to the object at ffff88800ccd5cb0 [ 62.060966] which belongs to the cache vm_area_struct of size 168 [ 62.062509] The buggy address is located 88 bytes inside of [ 62.062509] freed 168-byte region [ffff88800ccd5cb0, ffff88800ccd5d58) [ 62.064000] [ 62.064226] The buggy address belongs to the physical page: [ 62.064927] page:00000000a2edcbd7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xccd5 [ 62.066078] memcg:ffff88800de7f001 [ 62.066531] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.067205] page_type: 0xffffffff() [ 62.067677] raw: 0100000000000200 ffff88800879fc80 ffffea000037f200 dead000000000008 [ 62.068643] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de7f001 [ 62.069595] page dumped because: kasan: bad access detected [ 62.070244] [ 62.070456] Memory state around the buggy address: [ 62.071029] ffff88800ccd5c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 62.071887] ffff88800ccd5c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 62.072737] >ffff88800ccd5d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 62.073597] ^ [ 62.074034] ffff88800ccd5d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 62.074881] ffff88800ccd5e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 62.075722] ================================================================== [ 62.076639] Disabling lock debugging due to kernel taint [ 64.257378] BUG: Bad rss-counter state mm:0000000006915414 type:MM_FILEPAGES val:33 [ 64.258420] BUG: Bad rss-counter state mm:0000000006915414 type:MM_ANONPAGES val:22 [ 64.775062] BUG: Bad rss-counter state mm:0000000015e9904e type:MM_FILEPAGES val:33 [ 64.776013] BUG: Bad rss-counter state mm:0000000015e9904e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14696' (ECDSA) to the list of known hosts. 2023/06/19 22:40:20 fuzzer started 2023/06/19 22:40:20 dialing manager at localhost:44161 2023/06/19 22:40:20 checking machine... 2023/06/19 22:40:20 checking revisions... [ 65.362711] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:40:20 testing simple program... [ 65.413545] cgroup: Unknown subsys name 'net' [ 65.458770] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:40:19 Registers: info registers vcpu 0 RAX=ffffffff863dc7b9 RBX=0000000000000001 RCX=ffffffff863dc7b8 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880169ff248 RSP=ffff8880169ff180 R8 =ffffffff863dc7bc R9 =ffff8880169ff230 R10=0000000000038001 R11=0000000000091b52 R12=ffff8880169ff250 R13=ffff8880169ff238 R14=ffff8880169ff840 R15=ffff8880169ff1f0 RIP=ffffffff81130b99 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 00007f0038585900 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=00007fffd3d14ff8 CR3=000000000e4c4000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8450d7d7 RBX=ffffffff813ad420 RCX=ffffffff864b1901 RDX=1ffff1100d9e135e RSI=ffffffff8450d7d7 RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =ffffffff864b19c0 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b53a6 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff888018392540 RIP=ffffffff813ad420 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 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=00007f3255f9f320 CR3=000000000971a000 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=2030323a30343a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a30343a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000