syzkaller login: [ 38.875888] BUG: Bad rss-counter state mm:00000000ce8545e9 type:MM_FILEPAGES val:33 [ 38.876850] BUG: Bad rss-counter state mm:00000000ce8545e9 type:MM_ANONPAGES val:22 [ 38.993420] ================================================================== [ 38.994096] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.994745] Read of size 8 at addr ffff88800e2a2968 by task sshd/219 [ 38.995297] [ 38.995446] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.996125] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.996930] Call Trace: [ 38.997146] [ 38.997523] dump_stack_lvl+0x91/0xf0 [ 38.997906] print_report+0xcc/0x620 [ 38.998250] ? __virt_addr_valid+0x102/0x340 [ 38.998618] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.999073] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.999495] kasan_report+0xbe/0xf0 [ 38.999869] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.000311] vma_interval_tree_remove+0xc75/0xec0 [ 39.000731] vma_prepare+0xc54/0x11a0 [ 39.001059] __split_vma+0x5af/0x950 [ 39.001370] ? __pfx___split_vma+0x10/0x10 [ 39.001768] ? find_held_lock+0x2c/0x110 [ 39.002183] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.002575] ? lock_is_held_type+0x9f/0x120 [ 39.002951] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.003371] ? mtree_range_walk+0x632/0x900 [ 39.003759] ? mas_walk+0x5c7/0x7c0 [ 39.004103] do_vmi_munmap+0x1f1/0x2b0 [ 39.004449] mmap_region+0x1f9/0x2660 [ 39.004785] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.005147] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.005624] ? __pfx_lock_acquire+0x10/0x10 [ 39.005983] ? __pfx_mmap_region+0x10/0x10 [ 39.006381] ? security_mmap_addr+0x7d/0xa0 [ 39.006726] ? get_unmapped_area+0x1f5/0x3f0 [ 39.007090] do_mmap+0x854/0xf00 [ 39.007384] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.007726] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.008104] ksys_mmap_pgoff+0x3af/0x500 [ 39.008440] do_syscall_64+0x3f/0x90 [ 39.008766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.009209] RIP: 0033:0x7f9405409d82 [ 39.009509] 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 [ 39.010948] RSP: 002b:00007ffc3bdef2f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.011558] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9405409d82 [ 39.012156] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9404843000 [ 39.012703] RBP: 00007f9404843000 R08: 0000000000000009 R09: 0000000000001000 [ 39.013276] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a14ff65b20 [ 39.013815] R13: 00007ffc3bdef310 R14: 00007ffc3bdef340 R15: 00007ffc3bdef6a0 [ 39.014388] [ 39.014575] [ 39.014713] Allocated by task 212: [ 39.014984] kasan_save_stack+0x22/0x50 [ 39.015329] kasan_set_track+0x25/0x30 [ 39.015644] __kasan_slab_alloc+0x59/0x70 [ 39.015985] kmem_cache_alloc+0x16b/0x370 [ 39.016409] vm_area_dup+0x20/0x160 [ 39.016783] __split_vma+0x170/0x950 [ 39.017163] split_vma+0xc6/0x110 [ 39.017537] mprotect_fixup+0x8d2/0xb30 [ 39.017971] do_mprotect_pkey+0x87e/0xd40 [ 39.018445] __x64_sys_mprotect+0x78/0xc0 [ 39.018832] do_syscall_64+0x3f/0x90 [ 39.019161] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.019589] [ 39.019738] Freed by task 203: [ 39.020012] kasan_save_stack+0x22/0x50 [ 39.020371] kasan_set_track+0x25/0x30 [ 39.020713] kasan_save_free_info+0x2b/0x50 [ 39.021102] __kasan_slab_free+0x10a/0x190 [ 39.021464] kmem_cache_free+0x10d/0x4d0 [ 39.021820] rcu_core+0x8c8/0x2860 [ 39.022202] __do_softirq+0x1b7/0x7d4 [ 39.022540] [ 39.022693] Last potentially related work creation: [ 39.023107] kasan_save_stack+0x22/0x50 [ 39.023463] __kasan_record_aux_stack+0x8e/0xa0 [ 39.023942] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.024537] remove_vma+0x139/0x170 [ 39.024974] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.025469] do_vmi_munmap+0x1f1/0x2b0 [ 39.025895] __vm_munmap+0x138/0x3a0 [ 39.026360] __x64_sys_munmap+0x59/0x80 [ 39.026752] do_syscall_64+0x3f/0x90 [ 39.027106] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.027539] [ 39.027686] Second to last potentially related work creation: [ 39.028141] kasan_save_stack+0x22/0x50 [ 39.028469] __kasan_record_aux_stack+0x8e/0xa0 [ 39.028848] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.029268] remove_vma+0x139/0x170 [ 39.029576] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.029977] do_vmi_munmap+0x1f1/0x2b0 [ 39.030356] mmap_region+0x1f9/0x2660 [ 39.030674] do_mmap+0x854/0xf00 [ 39.030982] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.031310] ksys_mmap_pgoff+0x7d/0x500 [ 39.031632] do_syscall_64+0x3f/0x90 [ 39.031955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.032407] [ 39.032554] The buggy address belongs to the object at ffff88800e2a2910 [ 39.032554] which belongs to the cache vm_area_struct of size 168 [ 39.033573] The buggy address is located 88 bytes inside of [ 39.033573] freed 168-byte region [ffff88800e2a2910, ffff88800e2a29b8) [ 39.034512] [ 39.034657] The buggy address belongs to the physical page: [ 39.035091] page:000000004f74d381 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2a2 [ 39.035802] memcg:ffff88800e225c01 [ 39.036087] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.036528] page_type: 0xffffffff() [ 39.036834] raw: 0100000000000200 ffff8880087a0c80 ffffea00003ae340 dead000000000004 [ 39.037445] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e225c01 [ 39.038109] page dumped because: kasan: bad access detected [ 39.038569] [ 39.038714] Memory state around the buggy address: [ 39.039105] ffff88800e2a2800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.039678] ffff88800e2a2880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.040236] >ffff88800e2a2900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.040788] ^ [ 39.041301] ffff88800e2a2980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 39.041843] ffff88800e2a2a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.042421] ================================================================== [ 39.043121] Disabling lock debugging due to kernel taint [ 41.038447] BUG: Bad rss-counter state mm:00000000550111a5 type:MM_FILEPAGES val:33 [ 41.039240] BUG: Bad rss-counter state mm:00000000550111a5 type:MM_ANONPAGES val:22 [ 41.319582] BUG: Bad rss-counter state mm:00000000a070b4d1 type:MM_FILEPAGES val:33 [ 41.320448] BUG: Bad rss-counter state mm:00000000a070b4d1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31377' (ECDSA) to the list of known hosts. 2023/06/21 09:45:14 fuzzer started 2023/06/21 09:45:14 dialing manager at localhost:36067 2023/06/21 09:45:14 checking machine... 2023/06/21 09:45:14 checking revisions... [ 41.893451] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:45:15 testing simple program... [ 41.926635] cgroup: Unknown subsys name 'net' [ 41.961171] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:45:14 Registers: info registers vcpu 0 RAX=ffffffff844c7d8e RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002ee5da6 RSI=ffffffff844c7d8e RDI=ffff88801772eda0 RBP=ffff88801772ed70 RSP=ffff88801772ecd0 R8 =0000000000000001 R9 =ffff88801772ed18 R10=0000000000038001 R11=00000000000b3f68 R12=ffff88801772eda0 R13=0000000000000000 R14=ffff8880176b3680 R15=ffff88801772f1f8 RIP=ffffffff84538440 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 00007f083d2d5900 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=00007f083d29f008 CR3=000000001bdcc000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007f4087cb68c0 CR3=000000000d384000 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=2034313a35343a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a35343a3930203132 XMM08=00000000000000000000004f00000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000