syzkaller login: [ 40.824300] BUG: Bad rss-counter state mm:0000000001e8526e type:MM_FILEPAGES val:33 [ 40.825079] BUG: Bad rss-counter state mm:0000000001e8526e type:MM_ANONPAGES val:22 [ 40.952622] ================================================================== [ 40.953314] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.954032] Read of size 8 at addr ffff88800f157d08 by task sshd/220 [ 40.954623] [ 40.954792] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.955441] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.956274] Call Trace: [ 40.956519] [ 40.956738] dump_stack_lvl+0x91/0xf0 [ 40.957107] print_report+0xcc/0x620 [ 40.957482] ? __virt_addr_valid+0x102/0x340 [ 40.957927] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.958419] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.958893] kasan_report+0xbe/0xf0 [ 40.959248] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.959720] vma_interval_tree_remove+0xc75/0xec0 [ 40.960181] vma_prepare+0xc54/0x11a0 [ 40.960547] __split_vma+0x5af/0x950 [ 40.960910] ? __pfx___split_vma+0x10/0x10 [ 40.961312] ? find_held_lock+0x2c/0x110 [ 40.961710] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.962149] ? lock_is_held_type+0x9f/0x120 [ 40.962557] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.963016] ? mtree_range_walk+0x632/0x900 [ 40.963439] ? mas_walk+0x5c7/0x7c0 [ 40.963802] do_vmi_munmap+0x1f1/0x2b0 [ 40.964177] mmap_region+0x1f9/0x2660 [ 40.964544] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.964937] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.965477] ? __pfx_lock_acquire+0x10/0x10 [ 40.965885] ? __pfx_mmap_region+0x10/0x10 [ 40.966305] ? security_mmap_addr+0x7d/0xa0 [ 40.966710] ? get_unmapped_area+0x1f5/0x3f0 [ 40.967133] do_mmap+0x854/0xf00 [ 40.967472] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.967855] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.968285] ksys_mmap_pgoff+0x3af/0x500 [ 40.968675] do_syscall_64+0x3f/0x90 [ 40.969035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.969543] RIP: 0033:0x7f21d4fdcd82 [ 40.969898] 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 [ 40.971583] RSP: 002b:00007ffcecb55548 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.972279] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f21d4fdcd82 [ 40.972928] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f21d4416000 [ 40.973578] RBP: 00007f21d4416000 R08: 0000000000000009 R09: 0000000000001000 [ 40.974240] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d7fc841d90 [ 40.974890] R13: 00007ffcecb55560 R14: 00007ffcecb55590 R15: 00007ffcecb558f0 [ 40.975546] [ 40.975767] [ 40.975931] Allocated by task 213: [ 40.976264] kasan_save_stack+0x22/0x50 [ 40.976647] kasan_set_track+0x25/0x30 [ 40.977026] __kasan_slab_alloc+0x59/0x70 [ 40.977425] kmem_cache_alloc+0x16b/0x370 [ 40.977823] vm_area_dup+0x20/0x160 [ 40.978191] __split_vma+0x170/0x950 [ 40.978545] split_vma+0xc6/0x110 [ 40.978882] mprotect_fixup+0x8d2/0xb30 [ 40.979267] do_mprotect_pkey+0x87e/0xd40 [ 40.979667] __x64_sys_mprotect+0x78/0xc0 [ 40.980066] do_syscall_64+0x3f/0x90 [ 40.980425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.980922] [ 40.981084] Freed by task 213: [ 40.981385] kasan_save_stack+0x22/0x50 [ 40.981770] kasan_set_track+0x25/0x30 [ 40.982153] kasan_save_free_info+0x2b/0x50 [ 40.982561] __kasan_slab_free+0x10a/0x190 [ 40.982972] kmem_cache_free+0x10d/0x4d0 [ 40.983361] rcu_core+0x8c8/0x2860 [ 40.983699] __do_softirq+0x1b7/0x7d4 [ 40.984065] [ 40.984227] Last potentially related work creation: [ 40.984686] kasan_save_stack+0x22/0x50 [ 40.985067] __kasan_record_aux_stack+0x8e/0xa0 [ 40.985512] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.986024] remove_vma+0x139/0x170 [ 40.986373] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.986804] do_vmi_munmap+0x1f1/0x2b0 [ 40.987176] __vm_munmap+0x138/0x3a0 [ 40.987542] __x64_sys_munmap+0x59/0x80 [ 40.987918] do_syscall_64+0x3f/0x90 [ 40.988284] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.988775] [ 40.988938] Second to last potentially related work creation: [ 40.989467] kasan_save_stack+0x22/0x50 [ 40.989859] __kasan_record_aux_stack+0x8e/0xa0 [ 40.990307] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.990807] remove_vma+0x139/0x170 [ 40.991154] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.991581] do_vmi_munmap+0x1f1/0x2b0 [ 40.991957] mmap_region+0x1f9/0x2660 [ 40.992323] do_mmap+0x854/0xf00 [ 40.992651] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.993033] ksys_mmap_pgoff+0x3af/0x500 [ 40.993421] do_syscall_64+0x3f/0x90 [ 40.993795] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.994287] [ 40.994453] The buggy address belongs to the object at ffff88800f157cb0 [ 40.994453] which belongs to the cache vm_area_struct of size 168 [ 40.995581] The buggy address is located 88 bytes inside of [ 40.995581] freed 168-byte region [ffff88800f157cb0, ffff88800f157d58) [ 40.996666] [ 40.996829] The buggy address belongs to the physical page: [ 40.997340] page:00000000a4a0e7ad refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf157 [ 40.998187] memcg:ffff88800cbf7801 [ 40.998516] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.999048] page_type: 0xffffffff() [ 40.999399] raw: 0100000000000200 ffff88800879fc80 ffffea0000316880 dead000000000005 [ 41.000123] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cbf7801 [ 41.000821] page dumped because: kasan: bad access detected [ 41.001341] [ 41.001506] Memory state around the buggy address: [ 41.001957] ffff88800f157c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 41.002635] ffff88800f157c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 41.003320] >ffff88800f157d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 41.003971] ^ [ 41.004311] ffff88800f157d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 41.004973] ffff88800f157e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 41.005633] ================================================================== [ 41.006420] Disabling lock debugging due to kernel taint [ 42.493717] BUG: Bad rss-counter state mm:000000002d573d0c type:MM_FILEPAGES val:33 [ 42.494892] BUG: Bad rss-counter state mm:000000002d573d0c type:MM_ANONPAGES val:22 [ 42.942499] BUG: Bad rss-counter state mm:00000000357e11f0 type:MM_FILEPAGES val:33 [ 42.943800] BUG: Bad rss-counter state mm:00000000357e11f0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62442' (ECDSA) to the list of known hosts. 2023/06/20 00:43:05 fuzzer started 2023/06/20 00:43:05 dialing manager at localhost:44161 2023/06/20 00:43:05 checking machine... 2023/06/20 00:43:05 checking revisions... [ 43.574734] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:43:05 testing simple program... [ 43.620640] cgroup: Unknown subsys name 'net' [ 43.670701] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:42:55 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f4d12d3c378 CR3=000000000cad6000 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=f3e8f95194f7bca49d46203be2d28533 XMM02=000000000011d590ec2efd57dc4c00df XMM03=000000000012473898c796916d9138d5 XMM04=b0050d4c6cf65cce00000000000ae988 XMM05=19e9129bd510f2350000000000135610 XMM06=463f5cc8f491e45e0000000000134478 XMM07=e042d86d42eb936e00000000001249b8 XMM08=98c796916d9138d5000000000011d5f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=0000000000000001 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=00007ff572a91618 CR3=000000000da52000 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=2034303a33343a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a33343a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000