syzkaller login: [ 35.878012] BUG: Bad rss-counter state mm:00000000325ed7ae type:MM_FILEPAGES val:32 [ 35.879902] BUG: Bad rss-counter state mm:00000000325ed7ae type:MM_ANONPAGES val:22 [ 36.047577] ================================================================== [ 36.048674] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.049897] Read of size 8 at addr ffff88800e7fe6b0 by task sshd/219 [ 36.050878] [ 36.051112] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.052032] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.053096] Call Trace: [ 36.053437] [ 36.053744] dump_stack_lvl+0x91/0xf0 [ 36.054268] print_report+0xcc/0x620 [ 36.054795] ? __virt_addr_valid+0x102/0x340 [ 36.055385] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.056046] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.056710] kasan_report+0xbe/0xf0 [ 36.057224] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.057884] vma_interval_tree_remove+0xc75/0xec0 [ 36.058530] vma_prepare+0xc54/0x11a0 [ 36.059071] __split_vma+0x5af/0x950 [ 36.059577] ? __pfx___split_vma+0x10/0x10 [ 36.060145] ? find_held_lock+0x2c/0x110 [ 36.060700] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.061307] ? lock_is_held_type+0x9f/0x120 [ 36.061884] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.062534] ? mtree_range_walk+0x632/0x900 [ 36.063133] ? mas_walk+0x5c7/0x7c0 [ 36.063643] do_vmi_munmap+0x1f1/0x2b0 [ 36.064173] mmap_region+0x1f9/0x2660 [ 36.064694] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.065253] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.066029] ? __pfx_lock_acquire+0x10/0x10 [ 36.066603] ? __pfx_mmap_region+0x10/0x10 [ 36.067193] ? security_mmap_addr+0x7d/0xa0 [ 36.067766] ? get_unmapped_area+0x1f5/0x3f0 [ 36.068363] do_mmap+0x854/0xf00 [ 36.068836] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.069372] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.069977] ksys_mmap_pgoff+0x3af/0x500 [ 36.070525] do_syscall_64+0x3f/0x90 [ 36.071055] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.071746] RIP: 0033:0x7fd963b0dd82 [ 36.072241] 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 [ 36.074515] RSP: 002b:00007ffecee96f78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.075496] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd963b0dd82 [ 36.076405] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd962f47000 [ 36.077316] RBP: 00007fd962f47000 R08: 0000000000000009 R09: 0000000000001000 [ 36.078222] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565042f12b20 [ 36.079138] R13: 00007ffecee96f90 R14: 00007ffecee96fc0 R15: 00007ffecee97320 [ 36.080060] [ 36.080376] [ 36.080604] Allocated by task 212: [ 36.081068] kasan_save_stack+0x22/0x50 [ 36.081610] kasan_set_track+0x25/0x30 [ 36.082145] __kasan_slab_alloc+0x59/0x70 [ 36.082724] kmem_cache_alloc+0x16b/0x370 [ 36.083283] vm_area_dup+0x20/0x160 [ 36.083769] __split_vma+0x170/0x950 [ 36.084271] split_vma+0xc6/0x110 [ 36.084744] mprotect_fixup+0x8d2/0xb30 [ 36.085282] do_mprotect_pkey+0x87e/0xd40 [ 36.085841] __x64_sys_mprotect+0x78/0xc0 [ 36.086396] do_syscall_64+0x3f/0x90 [ 36.086918] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.087606] [ 36.087838] Freed by task 212: [ 36.088260] kasan_save_stack+0x22/0x50 [ 36.088799] kasan_set_track+0x25/0x30 [ 36.089331] kasan_save_free_info+0x2b/0x50 [ 36.089905] __kasan_slab_free+0x10a/0x190 [ 36.090480] kmem_cache_free+0x10d/0x4d0 [ 36.091041] rcu_core+0x8c8/0x2860 [ 36.091600] __do_softirq+0x1b7/0x7d4 [ 36.092110] [ 36.092339] Last potentially related work creation: [ 36.092966] kasan_save_stack+0x22/0x50 [ 36.093502] __kasan_record_aux_stack+0x8e/0xa0 [ 36.094112] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.094819] remove_vma+0x139/0x170 [ 36.095304] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.095896] do_vmi_munmap+0x1f1/0x2b0 [ 36.096420] __vm_munmap+0x138/0x3a0 [ 36.096931] __x64_sys_munmap+0x59/0x80 [ 36.097462] do_syscall_64+0x3f/0x90 [ 36.097972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.098677] [ 36.098910] Second to last potentially related work creation: [ 36.099651] kasan_save_stack+0x22/0x50 [ 36.100197] __kasan_record_aux_stack+0x8e/0xa0 [ 36.100815] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.101515] remove_vma+0x139/0x170 [ 36.102003] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.102607] do_vmi_munmap+0x1f1/0x2b0 [ 36.103149] mmap_region+0x1f9/0x2660 [ 36.103669] do_mmap+0x854/0xf00 [ 36.104136] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.104658] ksys_mmap_pgoff+0x3af/0x500 [ 36.105198] do_syscall_64+0x3f/0x90 [ 36.105740] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.106437] [ 36.106688] The buggy address belongs to the object at ffff88800e7fe658 [ 36.106688] which belongs to the cache vm_area_struct of size 168 [ 36.108280] The buggy address is located 88 bytes inside of [ 36.108280] freed 168-byte region [ffff88800e7fe658, ffff88800e7fe700) [ 36.109802] [ 36.110038] The buggy address belongs to the physical page: [ 36.110757] page:00000000ab7dbd1a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7fe [ 36.111925] memcg:ffff88800e141701 [ 36.112387] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.113092] page_type: 0xffffffff() [ 36.113581] raw: 0100000000000200 ffff88800879fc80 ffffea00003a6d00 dead000000000002 [ 36.114572] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e141701 [ 36.115571] page dumped because: kasan: bad access detected [ 36.116291] [ 36.116527] Memory state around the buggy address: [ 36.117159] ffff88800e7fe580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.118087] ffff88800e7fe600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 36.119028] >ffff88800e7fe680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.119954] ^ [ 36.120581] ffff88800e7fe700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 36.121513] ffff88800e7fe780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 36.122433] ================================================================== [ 36.123508] Disabling lock debugging due to kernel taint [ 38.336970] BUG: Bad rss-counter state mm:00000000c178d8a6 type:MM_FILEPAGES val:33 [ 38.338434] BUG: Bad rss-counter state mm:00000000c178d8a6 type:MM_ANONPAGES val:22 [ 38.772001] BUG: Bad rss-counter state mm:000000001cc23014 type:MM_FILEPAGES val:33 [ 38.773037] BUG: Bad rss-counter state mm:000000001cc23014 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28790' (ECDSA) to the list of known hosts. 2023/06/19 22:51:02 fuzzer started 2023/06/19 22:51:02 dialing manager at localhost:44161 2023/06/19 22:51:02 checking machine... 2023/06/19 22:51:02 checking revisions... [ 39.528190] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:51:03 testing simple program... [ 39.576897] cgroup: Unknown subsys name 'net' [ 39.651432] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:50:57 Registers: info registers vcpu 0 RAX=000055bd3bfcdb2a RBX=000055bd3bfcdb20 RCX=0000000000000030 RDX=0000000000000001 RSI=00007ff615d193c0 RDI=000055bd3bfcdb20 RBP=000000000000000f RSP=00007ffc9cf28590 R8 =000055bd3bff9263 R9 =00007ff615d65be0 R10=000000000000006f R11=0000000000000246 R12=000055bd3bfeaf70 R13=00007ffc9cf28598 R14=00007ff61578eb22 R15=00007ff6157b3710 RIP=00007ff6162e041f RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff6157b3900 00000000 00000000 GS =0000 0000000000000000 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=00007ff615d68650 CR3=0000000014672000 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=23232323232323232323232323232323 XMM01=00000053000002a03b031b01003d0920 XMM02=ffff0000000000000000000000000000 XMM03=00003737313009524148434553415245 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000000000000000ffffffffffffff XMM08=00003737313009524148434553415245 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff888008d87c98 RCX=ffffffff813b8f97 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888008d87c60 RSP=ffff888008d87bb0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888008d87cc0 R13=0000000000000000 R14=0000000000000000 R15=0000000000000200 RIP=ffffffff814c01d0 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 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=00007f2c0ef6cb10 CR3=0000000013a6c000 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=efd864958527a981bc422fcb9923c355 XMM02=000000000011f108d59e07bde36eea69 XMM03=000000000011f230ec2efd57dc4c00df XMM04=2d38a5f0a9fd521300000000000ae988 XMM05=08f8774104ad755300000000001359b0 XMM06=1577de8bb45255460000000000134750 XMM07=fb795ef6d657705600000000001239d0 XMM08=2c67c8bc2e329bc3000000000011f230 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000