Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.370605] BUG: Bad rss-counter state mm:000000000af6fe75 type:MM_FILEPAGES val:33 [ 36.371796] BUG: Bad rss-counter state mm:000000000af6fe75 type:MM_ANONPAGES val:22 [ 36.529013] ================================================================== [ 36.529976] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.530917] Read of size 8 at addr ffff88800eccd310 by task sshd/218 [ 36.531825] [ 36.532056] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.532963] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.533957] Call Trace: [ 36.534275] [ 36.534558] dump_stack_lvl+0x91/0xf0 [ 36.535051] print_report+0xcc/0x620 [ 36.535560] ? __virt_addr_valid+0x102/0x340 [ 36.536129] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.536772] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.537412] kasan_report+0xbe/0xf0 [ 36.537898] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.538547] vma_interval_tree_remove+0xc75/0xec0 [ 36.539184] vma_prepare+0xc54/0x11a0 [ 36.539696] __split_vma+0x5af/0x950 [ 36.540192] ? __pfx___split_vma+0x10/0x10 [ 36.540788] ? find_held_lock+0x2c/0x110 [ 36.541356] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.541959] ? lock_is_held_type+0x9f/0x120 [ 36.542538] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.543184] ? mtree_range_walk+0x632/0x900 [ 36.543771] ? mas_walk+0x5c7/0x7c0 [ 36.544270] do_vmi_munmap+0x1f1/0x2b0 [ 36.544795] mmap_region+0x1f9/0x2660 [ 36.545316] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.545862] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.546622] ? __pfx_lock_acquire+0x10/0x10 [ 36.547185] ? __pfx_mmap_region+0x10/0x10 [ 36.547747] ? security_mmap_addr+0x7d/0xa0 [ 36.548322] ? get_unmapped_area+0x1f5/0x3f0 [ 36.548905] do_mmap+0x854/0xf00 [ 36.549384] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.549911] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.550514] ksys_mmap_pgoff+0x3af/0x500 [ 36.551065] do_syscall_64+0x3f/0x90 [ 36.551577] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.552263] RIP: 0033:0x7f0d6d331d82 [ 36.552763] 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 [ 36.555066] RSP: 002b:00007ffce845e3c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.556040] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0d6d331d82 [ 36.556956] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0d6c76b000 [ 36.557864] RBP: 00007f0d6c76b000 R08: 0000000000000009 R09: 0000000000001000 [ 36.558767] R10: 0000000000000812 R11: 0000000000000206 R12: 000055932a509f70 [ 36.559674] R13: 00007ffce845e3e0 R14: 00007ffce845e410 R15: 00007ffce845e770 [ 36.560605] [ 36.560914] [ 36.561143] Allocated by task 211: [ 36.561602] kasan_save_stack+0x22/0x50 [ 36.562137] kasan_set_track+0x25/0x30 [ 36.562674] __kasan_slab_alloc+0x59/0x70 [ 36.563235] kmem_cache_alloc+0x16b/0x370 [ 36.563790] vm_area_dup+0x20/0x160 [ 36.564272] __split_vma+0x170/0x950 [ 36.564770] split_vma+0xc6/0x110 [ 36.565238] mprotect_fixup+0x8d2/0xb30 [ 36.565778] do_mprotect_pkey+0x87e/0xd40 [ 36.566338] __x64_sys_mprotect+0x78/0xc0 [ 36.566891] do_syscall_64+0x3f/0x90 [ 36.567386] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.568079] [ 36.568306] Freed by task 211: [ 36.568733] kasan_save_stack+0x22/0x50 [ 36.569260] kasan_set_track+0x25/0x30 [ 36.569798] kasan_save_free_info+0x2b/0x50 [ 36.570379] __kasan_slab_free+0x10a/0x190 [ 36.570944] kmem_cache_free+0x10d/0x4d0 [ 36.571496] rcu_core+0x8c8/0x2860 [ 36.571971] __do_softirq+0x1b7/0x7d4 [ 36.572500] [ 36.572771] Last potentially related work creation: [ 36.573414] kasan_save_stack+0x22/0x50 [ 36.573953] __kasan_record_aux_stack+0x8e/0xa0 [ 36.574567] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.575248] remove_vma+0x139/0x170 [ 36.575735] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.576338] do_vmi_munmap+0x1f1/0x2b0 [ 36.576873] __vm_munmap+0x138/0x3a0 [ 36.577374] __x64_sys_munmap+0x59/0x80 [ 36.577908] do_syscall_64+0x3f/0x90 [ 36.578415] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.579104] [ 36.579330] Second to last potentially related work creation: [ 36.580057] kasan_save_stack+0x22/0x50 [ 36.580609] __kasan_record_aux_stack+0x8e/0xa0 [ 36.581221] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.581901] remove_vma+0x139/0x170 [ 36.582388] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.582980] do_vmi_munmap+0x1f1/0x2b0 [ 36.583496] mmap_region+0x1f9/0x2660 [ 36.584007] do_mmap+0x854/0xf00 [ 36.584469] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.584995] ksys_mmap_pgoff+0x3af/0x500 [ 36.585531] do_syscall_64+0x3f/0x90 [ 36.586030] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.586703] [ 36.586933] The buggy address belongs to the object at ffff88800eccd2b8 [ 36.586933] which belongs to the cache vm_area_struct of size 168 [ 36.588503] The buggy address is located 88 bytes inside of [ 36.588503] freed 168-byte region [ffff88800eccd2b8, ffff88800eccd360) [ 36.590012] [ 36.590241] The buggy address belongs to the physical page: [ 36.590947] page:00000000d4e8b014 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeccd [ 36.592115] memcg:ffff88800dc7c601 [ 36.592571] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.593323] page_type: 0xffffffff() [ 36.593809] raw: 0100000000000200 ffff88800879fc80 ffffea00005158c0 dead000000000003 [ 36.594794] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc7c601 [ 36.595760] page dumped because: kasan: bad access detected [ 36.596488] [ 36.596717] Memory state around the buggy address: [ 36.597344] ffff88800eccd200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 36.598262] ffff88800eccd280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 36.599181] >ffff88800eccd300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 36.600098] ^ [ 36.600600] ffff88800eccd380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.601514] ffff88800eccd400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 36.602428] ================================================================== [ 36.603485] Disabling lock debugging due to kernel taint [ 39.190385] BUG: Bad rss-counter state mm:00000000721122c7 type:MM_FILEPAGES val:33 [ 39.191051] BUG: Bad rss-counter state mm:00000000721122c7 type:MM_ANONPAGES val:22 [ 39.686892] BUG: Bad rss-counter state mm:00000000b2817c0c type:MM_FILEPAGES val:33 [ 39.688068] BUG: Bad rss-counter state mm:00000000b2817c0c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63103' (ECDSA) to the list of known hosts. 2023/06/19 22:04:14 fuzzer started 2023/06/19 22:04:15 dialing manager at localhost:44161 2023/06/19 22:04:15 checking machine... 2023/06/19 22:04:15 checking revisions... [ 40.303421] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:04:15 testing simple program... [ 40.351706] cgroup: Unknown subsys name 'net' [ 40.402625] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:04:09 Registers: info registers vcpu 0 RAX=ffffffff815a7556 RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff815a2954 RDI=ffffffff852be698 RBP=ffff8880146d7d28 RSP=ffff8880146d7c58 R8 =0000000000000004 R9 =000000007fff0000 R10=000000007fff0000 R11=0000000000000000 R12=00000000000000bf R13=ffff8880146d7d60 R14=00000000000000bf R15=ffffc90000644058 RIP=ffffffff814c07e0 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 00007f1b48aca900 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=00007f2461830650 CR3=000000000c538000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=51e5b08d7ae2046400000000000ae988 XMM05=acc8d6bcd850d32d0000000000135e18 XMM06=bdf2e299e47b49d50000000000134898 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=00007ffec677cb68 CR3=000000000d5b8000 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=2034313a34303a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a34303a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000