Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.449162] BUG: Bad rss-counter state mm:0000000093405703 type:MM_FILEPAGES val:33 [ 32.450405] BUG: Bad rss-counter state mm:0000000093405703 type:MM_ANONPAGES val:22 [ 32.493124] ================================================================== [ 32.494220] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.495287] Read of size 8 at addr ffff88800e72c058 by task sshd/226 [ 32.496148] [ 32.496390] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.497364] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.498410] Call Trace: [ 32.498761] [ 32.499068] dump_stack_lvl+0x91/0xf0 [ 32.499610] print_report+0xcc/0x620 [ 32.500135] ? __virt_addr_valid+0x102/0x340 [ 32.500741] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.501415] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.502090] kasan_report+0xbe/0xf0 [ 32.502672] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.503394] vma_interval_tree_remove+0xc75/0xec0 [ 32.504090] vma_prepare+0xc54/0x11a0 [ 32.504652] __split_vma+0x5af/0x950 [ 32.505202] ? __pfx___split_vma+0x10/0x10 [ 32.505824] ? find_held_lock+0x2c/0x110 [ 32.506434] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.507110] ? lock_is_held_type+0x9f/0x120 [ 32.507732] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.508438] ? mtree_range_walk+0x632/0x900 [ 32.509084] ? mas_walk+0x5c7/0x7c0 [ 32.509648] do_vmi_munmap+0x1f1/0x2b0 [ 32.510227] mmap_region+0x1f9/0x2660 [ 32.510787] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.511374] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.512189] ? __pfx_lock_acquire+0x10/0x10 [ 32.512794] ? __pfx_mmap_region+0x10/0x10 [ 32.513406] ? security_mmap_addr+0x7d/0xa0 [ 32.514022] ? get_unmapped_area+0x1f5/0x3f0 [ 32.514675] do_mmap+0x854/0xf00 [ 32.515178] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.515752] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.516392] ksys_mmap_pgoff+0x3af/0x500 [ 32.516991] do_syscall_64+0x3f/0x90 [ 32.517545] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.518292] RIP: 0033:0x7f85ab44bd82 [ 32.518840] 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 [ 32.521334] RSP: 002b:00007ffd636a8a68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.522409] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f85ab44bd82 [ 32.523436] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f85aa885000 [ 32.524464] RBP: 00007f85aa885000 R08: 0000000000000009 R09: 0000000000001000 [ 32.525486] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bb02072f70 [ 32.526489] R13: 00007ffd636a8a80 R14: 00007ffd636a8ab0 R15: 00007ffd636a8e10 [ 32.527535] [ 32.527891] [ 32.528148] Allocated by task 219: [ 32.528678] kasan_save_stack+0x22/0x50 [ 32.529287] kasan_set_track+0x25/0x30 [ 32.529896] __kasan_slab_alloc+0x59/0x70 [ 32.530526] kmem_cache_alloc+0x16b/0x370 [ 32.531159] vm_area_dup+0x20/0x160 [ 32.531717] __split_vma+0x170/0x950 [ 32.532288] split_vma+0xc6/0x110 [ 32.532826] mprotect_fixup+0x8d2/0xb30 [ 32.533437] do_mprotect_pkey+0x87e/0xd40 [ 32.534073] __x64_sys_mprotect+0x78/0xc0 [ 32.534734] do_syscall_64+0x3f/0x90 [ 32.535321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.536124] [ 32.536388] Freed by task 219: [ 32.536879] kasan_save_stack+0x22/0x50 [ 32.537503] kasan_set_track+0x25/0x30 [ 32.538108] kasan_save_free_info+0x2b/0x50 [ 32.538789] __kasan_slab_free+0x10a/0x190 [ 32.539448] kmem_cache_free+0x10d/0x4d0 [ 32.540076] rcu_core+0x8c8/0x2860 [ 32.540637] __do_softirq+0x1b7/0x7d4 [ 32.541230] [ 32.541495] Last potentially related work creation: [ 32.542224] kasan_save_stack+0x22/0x50 [ 32.542861] __kasan_record_aux_stack+0x8e/0xa0 [ 32.543577] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.544385] remove_vma+0x139/0x170 [ 32.544951] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.545656] do_vmi_munmap+0x1f1/0x2b0 [ 32.546252] __vm_munmap+0x138/0x3a0 [ 32.546854] __x64_sys_munmap+0x59/0x80 [ 32.547488] do_syscall_64+0x3f/0x90 [ 32.548084] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.548889] [ 32.549159] Second to last potentially related work creation: [ 32.550034] kasan_save_stack+0x22/0x50 [ 32.550684] __kasan_record_aux_stack+0x8e/0xa0 [ 32.551421] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.552237] remove_vma+0x139/0x170 [ 32.552728] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.553314] do_vmi_munmap+0x1f1/0x2b0 [ 32.553816] mmap_region+0x1f9/0x2660 [ 32.554308] do_mmap+0x854/0xf00 [ 32.554766] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.555276] ksys_mmap_pgoff+0x3af/0x500 [ 32.555799] do_syscall_64+0x3f/0x90 [ 32.556292] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.556976] [ 32.557199] The buggy address belongs to the object at ffff88800e72c000 [ 32.557199] which belongs to the cache vm_area_struct of size 168 [ 32.558754] The buggy address is located 88 bytes inside of [ 32.558754] freed 168-byte region [ffff88800e72c000, ffff88800e72c0a8) [ 32.560228] [ 32.560455] The buggy address belongs to the physical page: [ 32.561135] page:00000000101014db refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe72c [ 32.562265] memcg:ffff88800e1f7601 [ 32.562722] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.563394] page_type: 0xffffffff() [ 32.563863] raw: 0100000000000200 ffff8880087a0c80 ffffea00003934c0 dead000000000006 [ 32.564826] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1f7601 [ 32.565781] page dumped because: kasan: bad access detected [ 32.566461] [ 32.566704] Memory state around the buggy address: [ 32.567304] ffff88800e72bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.568189] ffff88800e72bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.569086] >ffff88800e72c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.569980] ^ [ 32.570741] ffff88800e72c080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.571626] ffff88800e72c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.572520] ================================================================== [ 32.573957] Disabling lock debugging due to kernel taint [ 35.210318] BUG: Bad rss-counter state mm:00000000b33e6fe5 type:MM_FILEPAGES val:33 [ 35.211907] BUG: Bad rss-counter state mm:00000000b33e6fe5 type:MM_ANONPAGES val:22 [ 35.758343] BUG: Bad rss-counter state mm:00000000b7cefa52 type:MM_FILEPAGES val:33 [ 35.759496] BUG: Bad rss-counter state mm:00000000b7cefa52 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40328' (ECDSA) to the list of known hosts. 2023/06/21 05:42:03 fuzzer started 2023/06/21 05:42:03 dialing manager at localhost:36067 2023/06/21 05:42:03 checking machine... 2023/06/21 05:42:03 checking revisions... [ 36.500744] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:42:04 testing simple program... [ 36.551485] cgroup: Unknown subsys name 'net' [ 36.598730] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:42:03 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff11001b24f66 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff88800d927b18 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88806ce361a0 R15=0000000000000000 RIP=ffffffff8135b930 RFL=00000047 [---Z-PC] 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 00007f0217e14900 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=00007ffc96b26000 CR3=000000001651e000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f80df03a1e0 CR3=000000000cbfc000 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=4f775d748d1a498e704ad7fed8d87c23 XMM02=2c67c8bc2e329bc3000000000011b7d0 XMM03=fb795ef6d657705600000000001219d8 XMM04=dbe0f596a2769beb00000000000ae988 XMM05=7114989f622dba8f0000000000133628 XMM06=13e856d8d71426c800000000001327c8 XMM07=e042d86d42eb936e0000000000121c58 XMM08=571fab0d0767a814000000000011b830 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000