syzkaller login: [ 30.830087] BUG: Bad rss-counter state mm:000000003b8b5caf type:MM_FILEPAGES val:33 [ 30.831518] BUG: Bad rss-counter state mm:000000003b8b5caf type:MM_ANONPAGES val:22 [ 30.988322] ================================================================== [ 30.989393] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.990514] Read of size 8 at addr ffff88800f204a50 by task sshd/221 [ 30.991637] [ 30.991918] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.992928] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.993930] Call Trace: [ 30.994258] [ 30.994544] dump_stack_lvl+0x91/0xf0 [ 30.995049] print_report+0xcc/0x620 [ 30.995536] ? __virt_addr_valid+0x102/0x340 [ 30.996104] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.996747] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.997393] kasan_report+0xbe/0xf0 [ 30.997874] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.998507] vma_interval_tree_remove+0xc75/0xec0 [ 30.999130] vma_prepare+0xc54/0x11a0 [ 30.999614] __split_vma+0x5af/0x950 [ 31.000106] ? __pfx___split_vma+0x10/0x10 [ 31.000633] ? find_held_lock+0x2c/0x110 [ 31.001161] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.001728] ? lock_is_held_type+0x9f/0x120 [ 31.002270] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.002887] ? mtree_range_walk+0x632/0x900 [ 31.003474] ? mas_walk+0x5c7/0x7c0 [ 31.003977] do_vmi_munmap+0x1f1/0x2b0 [ 31.004478] mmap_region+0x1f9/0x2660 [ 31.004969] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.005489] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.006244] ? __pfx_lock_acquire+0x10/0x10 [ 31.006819] ? __pfx_mmap_region+0x10/0x10 [ 31.007391] ? security_mmap_addr+0x7d/0xa0 [ 31.007962] ? get_unmapped_area+0x1f5/0x3f0 [ 31.008538] do_mmap+0x854/0xf00 [ 31.008980] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.009481] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.010045] ksys_mmap_pgoff+0x3af/0x500 [ 31.010558] do_syscall_64+0x3f/0x90 [ 31.011045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.011708] RIP: 0033:0x7f0c94e7ad82 [ 31.012204] 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 [ 31.014338] RSP: 002b:00007ffe11b616e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.015248] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0c94e7ad82 [ 31.016116] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0c942b4000 [ 31.016962] RBP: 00007f0c942b4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.017810] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558143309ec0 [ 31.018656] R13: 00007ffe11b61700 R14: 00007ffe11b61730 R15: 00007ffe11b61a90 [ 31.019536] [ 31.019830] [ 31.020062] Allocated by task 214: [ 31.020488] kasan_save_stack+0x22/0x50 [ 31.020997] kasan_set_track+0x25/0x30 [ 31.021489] __kasan_slab_alloc+0x59/0x70 [ 31.022013] kmem_cache_alloc+0x16b/0x370 [ 31.022533] vm_area_dup+0x20/0x160 [ 31.023026] __split_vma+0x170/0x950 [ 31.023520] split_vma+0xc6/0x110 [ 31.023991] mprotect_fixup+0x8d2/0xb30 [ 31.024537] do_mprotect_pkey+0x87e/0xd40 [ 31.025090] __x64_sys_mprotect+0x78/0xc0 [ 31.025645] do_syscall_64+0x3f/0x90 [ 31.026146] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.026796] [ 31.027011] Freed by task 214: [ 31.027408] kasan_save_stack+0x22/0x50 [ 31.027958] kasan_set_track+0x25/0x30 [ 31.028473] kasan_save_free_info+0x2b/0x50 [ 31.029004] __kasan_slab_free+0x10a/0x190 [ 31.029556] kmem_cache_free+0x10d/0x4d0 [ 31.030094] rcu_core+0x8c8/0x2860 [ 31.030571] __do_softirq+0x1b7/0x7d4 [ 31.031066] [ 31.031289] Last potentially related work creation: [ 31.031885] kasan_save_stack+0x22/0x50 [ 31.032450] __kasan_record_aux_stack+0x8e/0xa0 [ 31.033040] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.033689] remove_vma+0x139/0x170 [ 31.034168] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.034741] do_vmi_munmap+0x1f1/0x2b0 [ 31.035289] __vm_munmap+0x138/0x3a0 [ 31.035832] __x64_sys_munmap+0x59/0x80 [ 31.036434] do_syscall_64+0x3f/0x90 [ 31.036985] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.037732] [ 31.037980] The buggy address belongs to the object at ffff88800f2049f8 [ 31.037980] which belongs to the cache vm_area_struct of size 168 [ 31.039719] The buggy address is located 88 bytes inside of [ 31.039719] freed 168-byte region [ffff88800f2049f8, ffff88800f204aa0) [ 31.041385] [ 31.041635] The buggy address belongs to the physical page: [ 31.042404] page:00000000b60b2bcf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf204 [ 31.043645] memcg:ffff88800f664901 [ 31.044101] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.044747] page_type: 0xffffffff() [ 31.045198] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.046174] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f664901 [ 31.047099] page dumped because: kasan: bad access detected [ 31.047763] [ 31.048004] Memory state around the buggy address: [ 31.048584] ffff88800f204900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.049442] ffff88800f204980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.050305] >ffff88800f204a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.051157] ^ [ 31.051862] ffff88800f204a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.052770] ffff88800f204b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.053685] ================================================================== [ 31.054785] Disabling lock debugging due to kernel taint [ 32.501374] BUG: Bad rss-counter state mm:000000003f85d6ca type:MM_FILEPAGES val:33 [ 32.502151] BUG: Bad rss-counter state mm:000000003f85d6ca type:MM_ANONPAGES val:22 [ 32.925783] BUG: Bad rss-counter state mm:0000000054894910 type:MM_FILEPAGES val:33 [ 32.926720] BUG: Bad rss-counter state mm:0000000054894910 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6173' (ECDSA) to the list of known hosts. 2023/06/21 10:27:41 fuzzer started 2023/06/21 10:27:41 dialing manager at localhost:36067 2023/06/21 10:27:41 checking machine... 2023/06/21 10:27:41 checking revisions... [ 33.622729] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:27:41 testing simple program... [ 33.672061] cgroup: Unknown subsys name 'net' [ 33.711791] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:27:40 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000003 RDI=ffff8880180bff58 RBP=0000000000000000 RSP=ffff8880180bff58 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8460009a 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 00007f6be7b9f900 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=00007f6be81570b0 CR3=0000000015e66000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005600746f6f72 XMM02=00000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=2f3a746f6f723a303a303a3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=0000560d3909f000 CR3=000000000e634000 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=2030343a37323a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a37323a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000