syzkaller login: [ 38.797355] BUG: Bad rss-counter state mm:000000006cb31957 type:MM_FILEPAGES val:33 [ 38.798608] BUG: Bad rss-counter state mm:000000006cb31957 type:MM_ANONPAGES val:22 [ 38.981213] ================================================================== [ 38.982188] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.983156] Read of size 8 at addr ffff88800ea4da50 by task sshd/219 [ 38.983955] [ 38.984176] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.985224] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.986232] Call Trace: [ 38.986559] [ 38.986954] dump_stack_lvl+0x91/0xf0 [ 38.987560] print_report+0xcc/0x620 [ 38.988228] ? __virt_addr_valid+0x102/0x340 [ 38.989008] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.989793] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.990550] kasan_report+0xbe/0xf0 [ 38.991147] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.991940] vma_interval_tree_remove+0xc75/0xec0 [ 38.992708] vma_prepare+0xc54/0x11a0 [ 38.993308] __split_vma+0x5af/0x950 [ 38.993908] ? __pfx___split_vma+0x10/0x10 [ 38.994559] ? find_held_lock+0x2c/0x110 [ 38.995209] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.995952] ? lock_is_held_type+0x9f/0x120 [ 38.996615] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.997289] ? mtree_range_walk+0x632/0x900 [ 38.997886] ? mas_walk+0x5c7/0x7c0 [ 38.998373] do_vmi_munmap+0x1f1/0x2b0 [ 38.998899] mmap_region+0x1f9/0x2660 [ 38.999404] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.999966] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.000721] ? __pfx_lock_acquire+0x10/0x10 [ 39.001276] ? __pfx_mmap_region+0x10/0x10 [ 39.001856] ? security_mmap_addr+0x7d/0xa0 [ 39.002414] ? get_unmapped_area+0x1f5/0x3f0 [ 39.003002] do_mmap+0x854/0xf00 [ 39.003459] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.004003] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.004583] ksys_mmap_pgoff+0x3af/0x500 [ 39.005122] do_syscall_64+0x3f/0x90 [ 39.005628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.006351] RIP: 0033:0x7f835ac6cd82 [ 39.006827] 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 [ 39.009001] RSP: 002b:00007ffef725eff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.009925] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f835ac6cd82 [ 39.010805] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f835a0a6000 [ 39.011680] RBP: 00007f835a0a6000 R08: 0000000000000009 R09: 0000000000001000 [ 39.012522] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558e0df2ab20 [ 39.013398] R13: 00007ffef725f010 R14: 00007ffef725f040 R15: 00007ffef725f3a0 [ 39.014268] [ 39.014564] [ 39.014801] Allocated by task 212: [ 39.015237] kasan_save_stack+0x22/0x50 [ 39.015773] kasan_set_track+0x25/0x30 [ 39.016263] __kasan_slab_alloc+0x59/0x70 [ 39.016789] kmem_cache_alloc+0x16b/0x370 [ 39.017300] vm_area_dup+0x20/0x160 [ 39.017756] __split_vma+0x170/0x950 [ 39.018222] split_vma+0xc6/0x110 [ 39.018662] mprotect_fixup+0x8d2/0xb30 [ 39.019168] do_mprotect_pkey+0x87e/0xd40 [ 39.019690] __x64_sys_mprotect+0x78/0xc0 [ 39.020205] do_syscall_64+0x3f/0x90 [ 39.020676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.021326] [ 39.021547] Freed by task 212: [ 39.021954] kasan_save_stack+0x22/0x50 [ 39.022461] kasan_set_track+0x25/0x30 [ 39.022961] kasan_save_free_info+0x2b/0x50 [ 39.023491] __kasan_slab_free+0x10a/0x190 [ 39.024034] kmem_cache_free+0x10d/0x4d0 [ 39.024549] rcu_core+0x8c8/0x2860 [ 39.024994] __do_softirq+0x1b7/0x7d4 [ 39.025530] [ 39.025752] Last potentially related work creation: [ 39.026337] kasan_save_stack+0x22/0x50 [ 39.026836] __kasan_record_aux_stack+0x8e/0xa0 [ 39.027414] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.028069] remove_vma+0x139/0x170 [ 39.028520] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.029077] do_vmi_munmap+0x1f1/0x2b0 [ 39.029561] __vm_munmap+0x138/0x3a0 [ 39.030030] __x64_sys_munmap+0x59/0x80 [ 39.030528] do_syscall_64+0x3f/0x90 [ 39.030999] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.031641] [ 39.031854] Second to last potentially related work creation: [ 39.032535] kasan_save_stack+0x22/0x50 [ 39.033046] __kasan_record_aux_stack+0x8e/0xa0 [ 39.033622] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.034274] remove_vma+0x139/0x170 [ 39.034724] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.035281] do_vmi_munmap+0x1f1/0x2b0 [ 39.035780] mmap_region+0x1f9/0x2660 [ 39.036258] do_mmap+0x854/0xf00 [ 39.036687] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.037176] ksys_mmap_pgoff+0x3af/0x500 [ 39.037676] do_syscall_64+0x3f/0x90 [ 39.038148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.038785] [ 39.039001] The buggy address belongs to the object at ffff88800ea4d9f8 [ 39.039001] which belongs to the cache vm_area_struct of size 168 [ 39.040520] The buggy address is located 88 bytes inside of [ 39.040520] freed 168-byte region [ffff88800ea4d9f8, ffff88800ea4daa0) [ 39.041937] [ 39.042156] The buggy address belongs to the physical page: [ 39.042814] page:000000002b163c08 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea4d [ 39.043904] memcg:ffff888009413e01 [ 39.044326] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.044968] page_type: 0xffffffff() [ 39.045419] raw: 0100000000000200 ffff88800879fc80 ffffea00005e2b00 dead000000000002 [ 39.046346] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009413e01 [ 39.047253] page dumped because: kasan: bad access detected [ 39.047930] [ 39.048143] Memory state around the buggy address: [ 39.048724] ffff88800ea4d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.049590] ffff88800ea4d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 39.050441] >ffff88800ea4da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.051298] ^ [ 39.052009] ffff88800ea4da80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 39.052860] ffff88800ea4db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.053710] ================================================================== [ 39.054741] Disabling lock debugging due to kernel taint [ 41.736147] BUG: Bad rss-counter state mm:0000000060ce8c6c type:MM_FILEPAGES val:33 [ 41.737821] BUG: Bad rss-counter state mm:0000000060ce8c6c type:MM_ANONPAGES val:22 [ 42.250926] BUG: Bad rss-counter state mm:000000007310c5ab type:MM_FILEPAGES val:33 [ 42.252033] BUG: Bad rss-counter state mm:000000007310c5ab type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26048' (ECDSA) to the list of known hosts. 2023/06/19 18:44:22 fuzzer started 2023/06/19 18:44:22 dialing manager at localhost:44161 2023/06/19 18:44:22 checking machine... 2023/06/19 18:44:22 checking revisions... [ 42.932183] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:44:22 testing simple program... [ 42.978450] cgroup: Unknown subsys name 'net' [ 43.027583] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:44:22 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a78 RCX=0000000000000001 RDX=1ffff1100d9c135a RSI=ffff888014217b30 RDI=ffff88806ce09a78 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a60 R8 =0000000000000001 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=0000000000024543 R12=ffff88806ce09b40 R13=0000000000000000 R14=ffff88800ffd3680 R15=ffff88800fedc400 RIP=ffffffff8113038e 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 00007eff81e4b700 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=00007f36e0f7cbb0 CR3=000000001a008000 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=2032323a34343a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a34343a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888015afa000 RCX=ffffffff8386d06b RDX=ffff8880166f3680 RSI=0000000000000000 RDI=0000000000000004 RBP=ffff88800956b6b8 RSP=ffff8880142bfa80 R8 =0000000000000004 R9 =00000000d2ac3123 R10=00000000000000e4 R11=0000000000000000 R12=00000000d2ac3123 R13=00000000000000e4 R14=dffffc0000000000 R15=ffff888015afa6b8 RIP=ffffffff814c07e0 RFL=00000296 [--S-AP-] 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 00007f78b7382900 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=00007ffd9598c000 CR3=000000000e25e000 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=6720646572637465733a4d41503d706f 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