[ 31.470246] BUG: Bad rss-counter state mm:0000000011a3f1a5 type:MM_FILEPAGES val:33 [ 31.471486] BUG: Bad rss-counter state mm:0000000011a3f1a5 type:MM_ANONPAGES val:22 [ 31.509016] ================================================================== [ 31.510149] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.511386] Read of size 8 at addr ffff88800d5ae3f8 by task sshd/219 [ 31.512325] [ 31.512579] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.513686] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.514873] Call Trace: [ 31.515262] [ 31.515612] dump_stack_lvl+0x91/0xf0 [ 31.516191] print_report+0xcc/0x620 [ 31.516770] ? __virt_addr_valid+0x102/0x340 [ 31.517463] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.518223] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.518976] kasan_report+0xbe/0xf0 [ 31.519560] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.520333] vma_interval_tree_remove+0xc75/0xec0 [ 31.521076] vma_prepare+0xc54/0x11a0 [ 31.521655] __split_vma+0x5af/0x950 [ 31.522224] ? __pfx___split_vma+0x10/0x10 [ 31.522854] ? find_held_lock+0x2c/0x110 [ 31.523486] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.524181] ? lock_is_held_type+0x9f/0x120 [ 31.524844] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.525610] ? mtree_range_walk+0x632/0x900 [ 31.526286] ? mas_walk+0x5c7/0x7c0 [ 31.526865] do_vmi_munmap+0x1f1/0x2b0 [ 31.527465] mmap_region+0x1f9/0x2660 [ 31.528049] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.528669] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.529559] ? __pfx_lock_acquire+0x10/0x10 [ 31.530199] ? __pfx_mmap_region+0x10/0x10 [ 31.530831] ? security_mmap_addr+0x7d/0xa0 [ 31.531468] ? get_unmapped_area+0x1f5/0x3f0 [ 31.532128] do_mmap+0x854/0xf00 [ 31.532658] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.533265] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.533972] ksys_mmap_pgoff+0x3af/0x500 [ 31.534580] do_syscall_64+0x3f/0x90 [ 31.535153] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.535919] RIP: 0033:0x7f1be8055d82 [ 31.536354] 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 [ 31.538373] RSP: 002b:00007ffdd2dc1578 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.539223] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1be8055d82 [ 31.540031] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1be748f000 [ 31.540823] RBP: 00007f1be748f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.541637] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555ecc710ec0 [ 31.542435] R13: 00007ffdd2dc1590 R14: 00007ffdd2dc15c0 R15: 00007ffdd2dc1920 [ 31.543246] [ 31.543523] [ 31.543728] Allocated by task 211: [ 31.544132] kasan_save_stack+0x22/0x50 [ 31.544610] kasan_set_track+0x25/0x30 [ 31.545081] __kasan_slab_alloc+0x59/0x70 [ 31.545594] kmem_cache_alloc+0x16b/0x370 [ 31.546097] vm_area_dup+0x20/0x160 [ 31.546544] __split_vma+0x170/0x950 [ 31.547002] split_vma+0xc6/0x110 [ 31.547444] mprotect_fixup+0x8d2/0xb30 [ 31.547940] do_mprotect_pkey+0x87e/0xd40 [ 31.548458] __x64_sys_mprotect+0x78/0xc0 [ 31.548971] do_syscall_64+0x3f/0x90 [ 31.549471] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.550115] [ 31.550332] Freed by task 211: [ 31.550717] kasan_save_stack+0x22/0x50 [ 31.551220] kasan_set_track+0x25/0x30 [ 31.551710] kasan_save_free_info+0x2b/0x50 [ 31.552234] __kasan_slab_free+0x10a/0x190 [ 31.552776] kmem_cache_free+0x10d/0x4d0 [ 31.553293] rcu_core+0x8c8/0x2860 [ 31.553748] __do_softirq+0x1b7/0x7d4 [ 31.554233] [ 31.554448] Last potentially related work creation: [ 31.555041] kasan_save_stack+0x22/0x50 [ 31.555540] __kasan_record_aux_stack+0x8e/0xa0 [ 31.556107] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.556743] remove_vma+0x139/0x170 [ 31.557192] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.557732] do_vmi_munmap+0x1f1/0x2b0 [ 31.558222] __vm_munmap+0x138/0x3a0 [ 31.558690] __x64_sys_munmap+0x59/0x80 [ 31.559192] do_syscall_64+0x3f/0x90 [ 31.559665] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.560302] [ 31.560512] The buggy address belongs to the object at ffff88800d5ae3a0 [ 31.560512] which belongs to the cache vm_area_struct of size 168 [ 31.561997] The buggy address is located 88 bytes inside of [ 31.561997] freed 168-byte region [ffff88800d5ae3a0, ffff88800d5ae448) [ 31.563395] [ 31.563610] The buggy address belongs to the physical page: [ 31.564270] page:000000005740b165 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd5ae [ 31.565351] memcg:ffff88800e19db01 [ 31.565786] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.566484] page_type: 0xffffffff() [ 31.566917] raw: 0100000000000200 ffff8880087a0c80 ffffea000032d880 dead000000000003 [ 31.567806] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e19db01 [ 31.568712] page dumped because: kasan: bad access detected [ 31.569390] [ 31.569611] Memory state around the buggy address: [ 31.570190] ffff88800d5ae280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.571040] ffff88800d5ae300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.571887] >ffff88800d5ae380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.572743] ^ [ 31.573593] ffff88800d5ae400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.574453] ffff88800d5ae480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.575316] ================================================================== [ 31.576354] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.797665] BUG: Bad rss-counter state mm:0000000073c7d7d4 type:MM_FILEPAGES val:33 [ 33.798883] BUG: Bad rss-counter state mm:0000000073c7d7d4 type:MM_ANONPAGES val:22 [ 34.180100] BUG: Bad rss-counter state mm:000000005cde6e7a type:MM_FILEPAGES val:33 [ 34.181149] BUG: Bad rss-counter state mm:000000005cde6e7a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44209' (ECDSA) to the list of known hosts. 2023/06/20 19:48:17 fuzzer started 2023/06/20 19:48:17 dialing manager at localhost:36067 2023/06/20 19:48:17 checking machine... 2023/06/20 19:48:17 checking revisions... [ 34.892121] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:48:18 testing simple program... [ 34.930464] cgroup: Unknown subsys name 'net' [ 34.969198] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:48:17 Registers: info registers vcpu 0 RAX=0000000000000282 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015f851c0 RSI=000000000000002e RDI=ffff888015c3ff58 RBP=ffff888015c3ff58 RSP=ffff888015c3ff28 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888015c3ff58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451202e 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 00007fa824ab7900 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=00007fa823fd5000 CR3=000000000c588000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=48d4c564207bcadc00000000000ae988 XMM05=b74641c1c8f604280000000000132e20 XMM06=26e2103f76d173710000000000131b58 XMM07=fb795ef6d657705600000000001220f0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86098097 RBX=0000000000000001 RCX=ffffffff86098092 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800c9df3e0 RSP=ffff88800c9df2c8 R8 =ffffffff86098096 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff88800c9df3e8 R13=ffff88800c9df3d0 R14=ffff88800c9df3c9 R15=ffff88800c9df388 RIP=ffffffff81130ab5 RFL=00000297 [--S-APC] 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 00007fd6a03e6900 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=00007fd6a099d618 CR3=000000000f6cc000 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=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000