[ 26.557465] BUG: Bad rss-counter state mm:00000000871860e2 type:MM_FILEPAGES val:33 [ 26.558631] BUG: Bad rss-counter state mm:00000000871860e2 type:MM_ANONPAGES val:22 [ 26.703760] ================================================================== [ 26.704694] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.705650] Read of size 8 at addr ffff88801bc06140 by task sshd/218 [ 26.706432] [ 26.706654] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.707718] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.708692] Call Trace: [ 26.709006] [ 26.709305] dump_stack_lvl+0x91/0xf0 [ 26.709791] print_report+0xcc/0x620 [ 26.710277] ? __virt_addr_valid+0x102/0x340 [ 26.710857] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.711483] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.712097] kasan_report+0xbe/0xf0 [ 26.712570] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.713207] vma_interval_tree_remove+0xc75/0xec0 [ 26.713811] vma_prepare+0xc54/0x11a0 [ 26.714290] __split_vma+0x5af/0x950 [ 26.714762] ? __pfx___split_vma+0x10/0x10 [ 26.715297] ? find_held_lock+0x2c/0x110 [ 26.715825] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.716388] ? lock_is_held_type+0x9f/0x120 [ 26.716928] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.717536] ? mtree_range_walk+0x632/0x900 [ 26.718088] ? mas_walk+0x5c7/0x7c0 [ 26.718557] do_vmi_munmap+0x1f1/0x2b0 [ 26.719067] mmap_region+0x1f9/0x2660 [ 26.719549] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.720059] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.720772] ? __pfx_lock_acquire+0x10/0x10 [ 26.721304] ? __pfx_mmap_region+0x10/0x10 [ 26.721840] ? security_mmap_addr+0x7d/0xa0 [ 26.722370] ? get_unmapped_area+0x1f5/0x3f0 [ 26.722921] do_mmap+0x854/0xf00 [ 26.723371] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.723862] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.724427] ksys_mmap_pgoff+0x3af/0x500 [ 26.724934] do_syscall_64+0x3f/0x90 [ 26.725413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.726058] RIP: 0033:0x7fe94e940d82 [ 26.726513] 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 [ 26.728638] RSP: 002b:00007fffcf7867c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.729544] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe94e940d82 [ 26.730386] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe94dd7a000 [ 26.731250] RBP: 00007fe94dd7a000 R08: 0000000000000009 R09: 0000000000001000 [ 26.732101] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564f3ecbdec0 [ 26.732942] R13: 00007fffcf7867e0 R14: 00007fffcf786810 R15: 00007fffcf786b70 [ 26.733797] [ 26.734090] [ 26.734306] Allocated by task 211: [ 26.734734] kasan_save_stack+0x22/0x50 [ 26.735252] kasan_set_track+0x25/0x30 [ 26.735744] __kasan_slab_alloc+0x59/0x70 [ 26.736266] kmem_cache_alloc+0x16b/0x370 [ 26.736788] vm_area_dup+0x20/0x160 [ 26.737247] __split_vma+0x170/0x950 [ 26.737721] split_vma+0xc6/0x110 [ 26.738158] mprotect_fixup+0x8d2/0xb30 [ 26.738664] do_mprotect_pkey+0x87e/0xd40 [ 26.739197] __x64_sys_mprotect+0x78/0xc0 [ 26.739720] do_syscall_64+0x3f/0x90 [ 26.740197] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.740846] [ 26.741061] Freed by task 211: [ 26.741457] kasan_save_stack+0x22/0x50 [ 26.741963] kasan_set_track+0x25/0x30 [ 26.742462] kasan_save_free_info+0x2b/0x50 [ 26.743010] __kasan_slab_free+0x10a/0x190 [ 26.743543] kmem_cache_free+0x10d/0x4d0 [ 26.744058] rcu_core+0x8c8/0x2860 [ 26.744509] __do_softirq+0x1b7/0x7d4 [ 26.744986] [ 26.745205] Last potentially related work creation: [ 26.745791] kasan_save_stack+0x22/0x50 [ 26.746306] __kasan_record_aux_stack+0x8e/0xa0 [ 26.746885] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.747550] remove_vma+0x139/0x170 [ 26.748067] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.748629] do_vmi_munmap+0x1f1/0x2b0 [ 26.749112] __vm_munmap+0x138/0x3a0 [ 26.749584] __x64_sys_munmap+0x59/0x80 [ 26.750080] do_syscall_64+0x3f/0x90 [ 26.750551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.751219] [ 26.751437] The buggy address belongs to the object at ffff88801bc060e8 [ 26.751437] which belongs to the cache vm_area_struct of size 168 [ 26.752904] The buggy address is located 88 bytes inside of [ 26.752904] freed 168-byte region [ffff88801bc060e8, ffff88801bc06190) [ 26.754307] [ 26.754527] The buggy address belongs to the physical page: [ 26.755193] page:0000000074d2c83b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc06 [ 26.756285] memcg:ffff888008f3b201 [ 26.756714] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.757362] page_type: 0xffffffff() [ 26.757821] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 26.758739] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888008f3b201 [ 26.759654] page dumped because: kasan: bad access detected [ 26.760315] [ 26.760535] Memory state around the buggy address: [ 26.761112] ffff88801bc06000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.761969] ffff88801bc06080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 26.762826] >ffff88801bc06100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.763692] ^ [ 26.764325] ffff88801bc06180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 26.765178] ffff88801bc06200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 26.766025] ================================================================== [ 26.767018] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.071223] BUG: Bad rss-counter state mm:00000000fe5b00d3 type:MM_FILEPAGES val:33 [ 29.072214] BUG: Bad rss-counter state mm:00000000fe5b00d3 type:MM_ANONPAGES val:22 [ 29.546634] BUG: Bad rss-counter state mm:00000000af354732 type:MM_FILEPAGES val:33 [ 29.547828] BUG: Bad rss-counter state mm:00000000af354732 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34246' (ECDSA) to the list of known hosts. 2023/06/19 21:24:16 fuzzer started 2023/06/19 21:24:16 dialing manager at localhost:44161 2023/06/19 21:24:16 checking machine... 2023/06/19 21:24:16 checking revisions... [ 30.200169] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:24:17 testing simple program... [ 30.264669] cgroup: Unknown subsys name 'net' [ 30.333642] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:24:13 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff888019957628 RCX=ffffffff86137501 RDX=1ffff1100332aed0 RSI=0000000000000000 RDI=ffffffff8180cd09 RBP=ffff888019957680 RSP=ffff888019957608 R8 =ffffffff86137542 R9 =ffff888019957668 R10=0000000000038001 R11=0000000000020d8a R12=ffff8880199576f0 R13=0000000000000000 R14=ffff88801589b680 R15=0000000000000d40 RIP=ffffffff811fc8a2 RFL=00000202 [-------] 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 00007f5e13fff700 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=00007ffeaa871e28 CR3=000000000ebe2000 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=2036313a34323a3132203931206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a34323a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800e11d140 RCX=ffffffff8364f395 RDX=ffff88801035b680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800f352000 RSP=ffff88801470f820 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=ffff88800e11d1a0 R14=0000000001000000 R15=dffffc0000000000 RIP=ffffffff814c07e4 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 00007f353ad55900 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=00007f353a1cc5a0 CR3=000000000d640000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=e086ee266944f9f800000000000ae988 XMM05=1c4e64dc050317d70000000000134ce8 XMM06=ff1072b5da687ca30000000000133448 XMM07=fb795ef6d65770560000000000123cd8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000