[ 39.588500] BUG: Bad rss-counter state mm:00000000ea8c4cc0 type:MM_FILEPAGES val:33 [ 39.589789] BUG: Bad rss-counter state mm:00000000ea8c4cc0 type:MM_ANONPAGES val:22 [ 39.734625] ================================================================== [ 39.735630] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.736799] Read of size 8 at addr ffff8880168a8c20 by task sshd/218 [ 39.737665] [ 39.737904] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.738866] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.739937] Call Trace: [ 39.740287] [ 39.740599] dump_stack_lvl+0x91/0xf0 [ 39.741150] print_report+0xcc/0x620 [ 39.741623] ? __virt_addr_valid+0x102/0x340 [ 39.742184] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.742809] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.743430] kasan_report+0xbe/0xf0 [ 39.743904] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.744525] vma_interval_tree_remove+0xc75/0xec0 [ 39.745140] vma_prepare+0xc54/0x11a0 [ 39.745615] __split_vma+0x5af/0x950 [ 39.746081] ? __pfx___split_vma+0x10/0x10 [ 39.746608] ? find_held_lock+0x2c/0x110 [ 39.747128] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.747687] ? lock_is_held_type+0x9f/0x120 [ 39.748219] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.748828] ? mtree_range_walk+0x632/0x900 [ 39.749381] ? mas_walk+0x5c7/0x7c0 [ 39.749847] do_vmi_munmap+0x1f1/0x2b0 [ 39.750332] mmap_region+0x1f9/0x2660 [ 39.750807] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.751318] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.752025] ? __pfx_lock_acquire+0x10/0x10 [ 39.752556] ? __pfx_mmap_region+0x10/0x10 [ 39.753099] ? security_mmap_addr+0x7d/0xa0 [ 39.753659] ? get_unmapped_area+0x1f5/0x3f0 [ 39.754232] do_mmap+0x854/0xf00 [ 39.754691] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.755210] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.755795] ksys_mmap_pgoff+0x3af/0x500 [ 39.756328] do_syscall_64+0x3f/0x90 [ 39.756826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.757522] RIP: 0033:0x7f0314e5ad82 [ 39.758005] 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 [ 39.760232] RSP: 002b:00007fffdf669dd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.761205] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0314e5ad82 [ 39.762088] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0314294000 [ 39.762973] RBP: 00007f0314294000 R08: 0000000000000009 R09: 0000000000001000 [ 39.763872] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b8d044af70 [ 39.764766] R13: 00007fffdf669df0 R14: 00007fffdf669e20 R15: 00007fffdf66a180 [ 39.765667] [ 39.765972] [ 39.766200] Allocated by task 211: [ 39.766644] kasan_save_stack+0x22/0x50 [ 39.767165] kasan_set_track+0x25/0x30 [ 39.767681] __kasan_slab_alloc+0x59/0x70 [ 39.768231] kmem_cache_alloc+0x16b/0x370 [ 39.768775] vm_area_dup+0x20/0x160 [ 39.769238] __split_vma+0x170/0x950 [ 39.769704] split_vma+0xc6/0x110 [ 39.770146] mprotect_fixup+0x8d2/0xb30 [ 39.770654] do_mprotect_pkey+0x87e/0xd40 [ 39.771173] __x64_sys_mprotect+0x78/0xc0 [ 39.771696] do_syscall_64+0x3f/0x90 [ 39.772175] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.772816] [ 39.773050] Freed by task 211: [ 39.773445] kasan_save_stack+0x22/0x50 [ 39.773946] kasan_set_track+0x25/0x30 [ 39.774438] kasan_save_free_info+0x2b/0x50 [ 39.774972] __kasan_slab_free+0x10a/0x190 [ 39.775505] kmem_cache_free+0x10d/0x4d0 [ 39.776010] rcu_core+0x8c8/0x2860 [ 39.776450] __do_softirq+0x1b7/0x7d4 [ 39.776935] [ 39.777149] Last potentially related work creation: [ 39.777801] kasan_save_stack+0x22/0x50 [ 39.778311] __kasan_record_aux_stack+0x8e/0xa0 [ 39.778882] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.779522] remove_vma+0x139/0x170 [ 39.779979] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.780541] do_vmi_munmap+0x1f1/0x2b0 [ 39.781044] __vm_munmap+0x138/0x3a0 [ 39.781517] __x64_sys_munmap+0x59/0x80 [ 39.782018] do_syscall_64+0x3f/0x90 [ 39.782499] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.783164] [ 39.783378] The buggy address belongs to the object at ffff8880168a8bc8 [ 39.783378] which belongs to the cache vm_area_struct of size 168 [ 39.784844] The buggy address is located 88 bytes inside of [ 39.784844] freed 168-byte region [ffff8880168a8bc8, ffff8880168a8c70) [ 39.786268] [ 39.786482] The buggy address belongs to the physical page: [ 39.787138] page:0000000056519e6d refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880168a8ae0 pfn:0x168a8 [ 39.788376] memcg:ffff88800fd52101 [ 39.788805] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.789472] page_type: 0xffffffff() [ 39.789921] raw: 0100000000000200 ffff88800879fc80 ffffea00005628c0 dead000000000004 [ 39.790859] raw: ffff8880168a8ae0 0000000080110010 00000001ffffffff ffff88800fd52101 [ 39.791788] page dumped because: kasan: bad access detected [ 39.792452] [ 39.792665] Memory state around the buggy address: [ 39.793265] ffff8880168a8b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.794123] ffff8880168a8b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 39.794977] >ffff8880168a8c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.795828] ^ [ 39.796355] ffff8880168a8c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 39.797221] ffff8880168a8d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 39.798067] ================================================================== [ 39.798975] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 41.275528] BUG: Bad rss-counter state mm:00000000705723ed type:MM_FILEPAGES val:33 [ 41.276234] BUG: Bad rss-counter state mm:00000000705723ed type:MM_ANONPAGES val:22 [ 41.856629] BUG: Bad rss-counter state mm:000000004a0de13e type:MM_FILEPAGES val:33 [ 41.858092] BUG: Bad rss-counter state mm:000000004a0de13e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2605' (ECDSA) to the list of known hosts. 2023/06/19 22:21:47 fuzzer started 2023/06/19 22:21:47 dialing manager at localhost:44161 2023/06/19 22:21:47 checking machine... 2023/06/19 22:21:47 checking revisions... [ 42.515534] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:21:47 testing simple program... [ 42.572289] cgroup: Unknown subsys name 'net' [ 42.627132] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:21:37 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=00007fe746a63850 CR3=000000000d5b4000 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=f85c71d402d9cf87e94cbc4b9e7263c3 XMM02=000000000011cfe8eff9b2d0a8fce9cb XMM03=000000000011d0b82c67c8bc2e329bc3 XMM04=be94a09becabd66900000000000ae988 XMM05=1441fc4c249f5d730000000000134b40 XMM06=bdf2e299e47b49d500000000001335c0 XMM07=fb795ef6d65770560000000000123e00 XMM08=2c67c8bc2e329bc3000000000011d058 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=1ffff1100267bf86 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff8880133dfc20 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=0000000000000000 R13=0000000000000000 R14=ffffffff856c1d40 R15=0000000000000000 RIP=ffffffff812d8ef8 RFL=00000206 [-----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 00007f2c74807900 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=00007f2c74dbe618 CR3=000000000906e000 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