syzkaller login: [ 34.826485] BUG: Bad rss-counter state mm:0000000034e51e74 type:MM_FILEPAGES val:33 [ 34.828423] BUG: Bad rss-counter state mm:0000000034e51e74 type:MM_ANONPAGES val:22 [ 34.995079] ================================================================== [ 34.996205] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.997270] Read of size 8 at addr ffff888016368ed8 by task sshd/221 [ 34.998137] [ 34.998363] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.999224] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.000227] Call Trace: [ 35.000547] [ 35.000832] dump_stack_lvl+0x91/0xf0 [ 35.001326] print_report+0xcc/0x620 [ 35.001813] ? __virt_addr_valid+0x102/0x340 [ 35.002378] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.002996] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.003617] kasan_report+0xbe/0xf0 [ 35.004104] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.004733] vma_interval_tree_remove+0xc75/0xec0 [ 35.005342] vma_prepare+0xc54/0x11a0 [ 35.005824] __split_vma+0x5af/0x950 [ 35.006301] ? __pfx___split_vma+0x10/0x10 [ 35.006838] ? find_held_lock+0x2c/0x110 [ 35.007371] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.007968] ? lock_is_held_type+0x9f/0x120 [ 35.008514] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.009123] ? mtree_range_walk+0x632/0x900 [ 35.009679] ? mas_walk+0x5c7/0x7c0 [ 35.010165] do_vmi_munmap+0x1f1/0x2b0 [ 35.010666] mmap_region+0x1f9/0x2660 [ 35.011150] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.011676] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.012401] ? __pfx_lock_acquire+0x10/0x10 [ 35.012934] ? __pfx_mmap_region+0x10/0x10 [ 35.013467] ? security_mmap_addr+0x7d/0xa0 [ 35.013998] ? get_unmapped_area+0x1f5/0x3f0 [ 35.014550] do_mmap+0x854/0xf00 [ 35.014991] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.015491] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.016066] ksys_mmap_pgoff+0x3af/0x500 [ 35.016573] do_syscall_64+0x3f/0x90 [ 35.017054] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.017699] RIP: 0033:0x7f1d7467cd82 [ 35.018154] 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 [ 35.020331] RSP: 002b:00007ffceea7b948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.021248] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1d7467cd82 [ 35.022103] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1d73ab6000 [ 35.022944] RBP: 00007f1d73ab6000 R08: 0000000000000009 R09: 0000000000001000 [ 35.023799] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c769f60f70 [ 35.024657] R13: 00007ffceea7b960 R14: 00007ffceea7b990 R15: 00007ffceea7bcf0 [ 35.025512] [ 35.025802] [ 35.026020] Allocated by task 213: [ 35.026456] kasan_save_stack+0x22/0x50 [ 35.026960] kasan_set_track+0x25/0x30 [ 35.027454] __kasan_slab_alloc+0x59/0x70 [ 35.028001] kmem_cache_alloc+0x16b/0x370 [ 35.028520] vm_area_dup+0x20/0x160 [ 35.028975] __split_vma+0x170/0x950 [ 35.029445] split_vma+0xc6/0x110 [ 35.029885] mprotect_fixup+0x8d2/0xb30 [ 35.030390] do_mprotect_pkey+0x87e/0xd40 [ 35.030911] __x64_sys_mprotect+0x78/0xc0 [ 35.031440] do_syscall_64+0x3f/0x90 [ 35.031911] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.032585] [ 35.032806] Freed by task 204: [ 35.033194] kasan_save_stack+0x22/0x50 [ 35.033704] kasan_set_track+0x25/0x30 [ 35.034197] kasan_save_free_info+0x2b/0x50 [ 35.034727] __kasan_slab_free+0x10a/0x190 [ 35.035261] kmem_cache_free+0x10d/0x4d0 [ 35.035771] rcu_core+0x8c8/0x2860 [ 35.036227] __do_softirq+0x1b7/0x7d4 [ 35.036706] [ 35.036924] Last potentially related work creation: [ 35.037514] kasan_save_stack+0x22/0x50 [ 35.038033] __kasan_record_aux_stack+0x8e/0xa0 [ 35.038630] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.039280] remove_vma+0x139/0x170 [ 35.039734] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.040324] do_vmi_munmap+0x1f1/0x2b0 [ 35.040811] __vm_munmap+0x138/0x3a0 [ 35.041277] __x64_sys_munmap+0x59/0x80 [ 35.041782] do_syscall_64+0x3f/0x90 [ 35.042258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.042897] [ 35.043114] The buggy address belongs to the object at ffff888016368e80 [ 35.043114] which belongs to the cache vm_area_struct of size 168 [ 35.044602] The buggy address is located 88 bytes inside of [ 35.044602] freed 168-byte region [ffff888016368e80, ffff888016368f28) [ 35.046005] [ 35.046221] The buggy address belongs to the physical page: [ 35.046878] page:00000000f0cee857 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16368 [ 35.047972] memcg:ffff88800e5d4301 [ 35.048403] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.049045] page_type: 0xffffffff() [ 35.049494] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.050411] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5d4301 [ 35.051314] page dumped because: kasan: bad access detected [ 35.051985] [ 35.052203] Memory state around the buggy address: [ 35.052787] ffff888016368d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.053649] ffff888016368e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 35.054500] >ffff888016368e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.055354] ^ [ 35.056087] ffff888016368f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 35.056946] ffff888016368f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.057797] ================================================================== [ 35.058787] Disabling lock debugging due to kernel taint [ 36.977307] BUG: Bad rss-counter state mm:000000007a37e044 type:MM_FILEPAGES val:33 [ 36.978231] BUG: Bad rss-counter state mm:000000007a37e044 type:MM_ANONPAGES val:22 [ 37.448950] BUG: Bad rss-counter state mm:00000000571bbc7e type:MM_FILEPAGES val:33 [ 37.449913] BUG: Bad rss-counter state mm:00000000571bbc7e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5102' (ECDSA) to the list of known hosts. 2023/06/19 20:28:12 fuzzer started 2023/06/19 20:28:12 dialing manager at localhost:44161 2023/06/19 20:28:12 checking machine... 2023/06/19 20:28:12 checking revisions... [ 38.171497] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:28:12 testing simple program... [ 38.229702] cgroup: Unknown subsys name 'net' [ 38.298782] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:28:06 Registers: info registers vcpu 0 RAX=ffffed100d9c13a3 RBX=ffffed100d9c13a4 RCX=ffffffff812e00e5 RDX=ffffed100d9c13a4 RSI=0000000000000004 RDI=ffff88806ce09d18 RBP=ffffed100d9c13a3 RSP=ffff88806ce09cd0 R8 =0000000000000001 R9 =ffffed100d9c13a3 R10=ffff88806ce09d1b R11=0000001589a821a0 R12=ffff88806ce39508 R13=ffff88806ce39510 R14=0000000000000000 R15=ffff888016de51c0 RIP=ffffffff8180f009 RFL=00000002 [-------] 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 00007f09c767b900 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=00007fff15926000 CR3=000000000da24000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 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=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=00007f0c58dfa2e0 CR3=0000000016e02000 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=2032313a38323a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a38323a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000