[ 61.256658] BUG: Bad rss-counter state mm:000000000e8cdf06 type:MM_FILEPAGES val:33 [ 61.257906] BUG: Bad rss-counter state mm:000000000e8cdf06 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 61.335000] ================================================================== [ 61.335965] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.336916] Read of size 8 at addr ffff88800e7d5d08 by task sshd/227 [ 61.337690] [ 61.337922] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.338906] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.339897] Call Trace: [ 61.340265] [ 61.340556] dump_stack_lvl+0x91/0xf0 [ 61.341048] print_report+0xcc/0x620 [ 61.341531] ? __virt_addr_valid+0x102/0x340 [ 61.342102] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.342729] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.343346] kasan_report+0xbe/0xf0 [ 61.343826] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.344447] vma_interval_tree_remove+0xc75/0xec0 [ 61.345060] vma_prepare+0xc54/0x11a0 [ 61.345568] __split_vma+0x5af/0x950 [ 61.346065] ? __pfx___split_vma+0x10/0x10 [ 61.346621] ? find_held_lock+0x2c/0x110 [ 61.347165] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.347772] ? lock_is_held_type+0x9f/0x120 [ 61.348342] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.348984] ? mtree_range_walk+0x632/0x900 [ 61.349562] ? mas_walk+0x5c7/0x7c0 [ 61.350071] do_vmi_munmap+0x1f1/0x2b0 [ 61.350583] mmap_region+0x1f9/0x2660 [ 61.351069] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.351592] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.352316] ? __pfx_lock_acquire+0x10/0x10 [ 61.352854] ? __pfx_mmap_region+0x10/0x10 [ 61.353395] ? security_mmap_addr+0x7d/0xa0 [ 61.353951] ? get_unmapped_area+0x1f5/0x3f0 [ 61.354508] do_mmap+0x854/0xf00 [ 61.354951] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.355458] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.356044] ksys_mmap_pgoff+0x3af/0x500 [ 61.356566] do_syscall_64+0x3f/0x90 [ 61.357044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.357695] RIP: 0033:0x7f6a91494d82 [ 61.358165] 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 [ 61.360315] RSP: 002b:00007ffc140edba8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.361234] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6a91494d82 [ 61.362112] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6a908ce000 [ 61.362957] RBP: 00007f6a908ce000 R08: 0000000000000009 R09: 0000000000001000 [ 61.363813] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557e5e00aec0 [ 61.364664] R13: 00007ffc140edbc0 R14: 00007ffc140edbf0 R15: 00007ffc140edf50 [ 61.365544] [ 61.365844] [ 61.366058] Allocated by task 220: [ 61.366503] kasan_save_stack+0x22/0x50 [ 61.367015] kasan_set_track+0x25/0x30 [ 61.367506] __kasan_slab_alloc+0x59/0x70 [ 61.368042] kmem_cache_alloc+0x16b/0x370 [ 61.368556] vm_area_dup+0x20/0x160 [ 61.369017] __split_vma+0x170/0x950 [ 61.369501] split_vma+0xc6/0x110 [ 61.369969] mprotect_fixup+0x8d2/0xb30 [ 61.370476] do_mprotect_pkey+0x87e/0xd40 [ 61.370997] __x64_sys_mprotect+0x78/0xc0 [ 61.371528] do_syscall_64+0x3f/0x90 [ 61.372014] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.372669] [ 61.372894] Freed by task 220: [ 61.373299] kasan_save_stack+0x22/0x50 [ 61.373827] kasan_set_track+0x25/0x30 [ 61.374331] kasan_save_free_info+0x2b/0x50 [ 61.374866] __kasan_slab_free+0x10a/0x190 [ 61.375411] kmem_cache_free+0x10d/0x4d0 [ 61.375938] rcu_core+0x8c8/0x2860 [ 61.376395] __do_softirq+0x1b7/0x7d4 [ 61.376878] [ 61.377092] Last potentially related work creation: [ 61.377683] kasan_save_stack+0x22/0x50 [ 61.378212] __kasan_record_aux_stack+0x8e/0xa0 [ 61.378790] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.379435] remove_vma+0x139/0x170 [ 61.379890] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.380464] do_vmi_munmap+0x1f1/0x2b0 [ 61.380960] __vm_munmap+0x138/0x3a0 [ 61.381440] __x64_sys_munmap+0x59/0x80 [ 61.381955] do_syscall_64+0x3f/0x90 [ 61.382449] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.383115] [ 61.383332] The buggy address belongs to the object at ffff88800e7d5cb0 [ 61.383332] which belongs to the cache vm_area_struct of size 168 [ 61.384830] The buggy address is located 88 bytes inside of [ 61.384830] freed 168-byte region [ffff88800e7d5cb0, ffff88800e7d5d58) [ 61.386251] [ 61.386474] The buggy address belongs to the physical page: [ 61.387151] page:00000000436b6637 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7d5 [ 61.388250] memcg:ffff88800e3ff901 [ 61.388680] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 61.389396] page_type: 0xffffffff() [ 61.389863] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b4880 dead000000000007 [ 61.390806] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3ff901 [ 61.391714] page dumped because: kasan: bad access detected [ 61.392395] [ 61.392614] Memory state around the buggy address: [ 61.393207] ffff88800e7d5c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 61.394089] ffff88800e7d5c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 61.394953] >ffff88800e7d5d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 61.395813] ^ [ 61.396263] ffff88800e7d5d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 61.397128] ffff88800e7d5e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 61.398002] ================================================================== [ 61.399052] Disabling lock debugging due to kernel taint [ 63.410144] BUG: Bad rss-counter state mm:000000005552e589 type:MM_FILEPAGES val:33 [ 63.411672] BUG: Bad rss-counter state mm:000000005552e589 type:MM_ANONPAGES val:22 [ 63.900218] BUG: Bad rss-counter state mm:000000009badfe52 type:MM_FILEPAGES val:33 [ 63.901481] BUG: Bad rss-counter state mm:000000009badfe52 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48643' (ECDSA) to the list of known hosts. 2023/06/20 13:21:40 fuzzer started 2023/06/20 13:21:40 dialing manager at localhost:36067 2023/06/20 13:21:40 checking machine... 2023/06/20 13:21:40 checking revisions... [ 64.715401] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:21:41 testing simple program... [ 64.767342] cgroup: Unknown subsys name 'net' [ 64.841058] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:21:40 Registers: info registers vcpu 0 RAX=1ffff11001d462f7 RBX=ffff88800ea31788 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800ea31798 RBP=ffff888019920000 RSP=ffff888008d9fc98 R8 =0000000000000001 R9 =ffffed10011b3f87 R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888018baa948 R14=ffffffff81162a75 R15=ffff888010338200 RIP=ffffffff818464b7 RFL=00000016 [----AP-] 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 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=00007fb0b087d0b0 CR3=0000000017bb2000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 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=00007f4bc4f98250 CR3=000000000c6cc000 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=b50d82dc92e8b3a3664bf55bd5f87426 XMM02=2c67c8bc2e329bc3000000000011b5b8 XMM03=fb795ef6d65770560000000000121f78 XMM04=d960d7e507135c0c00000000000ae988 XMM05=cc677445ba5af88200000000001322d8 XMM06=e8008b1642ea3e600000000000131960 XMM07=e042d86d42eb936e0000000000122250 XMM08=ecdeeca7b9f53c32000000000011b618 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000