syzkaller login: [ 30.598297] BUG: Bad rss-counter state mm:000000002b844257 type:MM_FILEPAGES val:33 [ 30.599532] BUG: Bad rss-counter state mm:000000002b844257 type:MM_ANONPAGES val:22 [ 30.704654] ================================================================== [ 30.705365] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.706093] Read of size 8 at addr ffff8880169dec20 by task sshd/220 [ 30.706693] [ 30.706859] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.707641] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.708393] Call Trace: [ 30.708638] [ 30.708861] dump_stack_lvl+0x91/0xf0 [ 30.709232] print_report+0xcc/0x620 [ 30.709619] ? __virt_addr_valid+0x102/0x340 [ 30.710041] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.710516] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.710989] kasan_report+0xbe/0xf0 [ 30.711353] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.711831] vma_interval_tree_remove+0xc75/0xec0 [ 30.712292] vma_prepare+0xc54/0x11a0 [ 30.712658] __split_vma+0x5af/0x950 [ 30.713028] ? __pfx___split_vma+0x10/0x10 [ 30.713440] ? find_held_lock+0x2c/0x110 [ 30.713841] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.714277] ? lock_is_held_type+0x9f/0x120 [ 30.714710] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.715176] ? mtree_range_walk+0x632/0x900 [ 30.715492] ? mas_walk+0x5c7/0x7c0 [ 30.715756] do_vmi_munmap+0x1f1/0x2b0 [ 30.716031] mmap_region+0x1f9/0x2660 [ 30.716302] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.716590] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.716985] ? __pfx_lock_acquire+0x10/0x10 [ 30.717281] ? __pfx_mmap_region+0x10/0x10 [ 30.717577] ? security_mmap_addr+0x7d/0xa0 [ 30.717879] ? get_unmapped_area+0x1f5/0x3f0 [ 30.718181] do_mmap+0x854/0xf00 [ 30.718420] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.718703] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.719012] ksys_mmap_pgoff+0x3af/0x500 [ 30.719290] do_syscall_64+0x3f/0x90 [ 30.719556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.719913] RIP: 0033:0x7faebe8e7d82 [ 30.720165] 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 [ 30.721339] RSP: 002b:00007fff0a1742e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.721838] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faebe8e7d82 [ 30.722331] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faebdd21000 [ 30.722865] RBP: 00007faebdd21000 R08: 0000000000000009 R09: 0000000000001000 [ 30.723333] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560e9e83eec0 [ 30.723803] R13: 00007fff0a174300 R14: 00007fff0a174330 R15: 00007fff0a174690 [ 30.724282] [ 30.724442] [ 30.724560] Allocated by task 213: [ 30.724800] kasan_save_stack+0x22/0x50 [ 30.725075] kasan_set_track+0x25/0x30 [ 30.725350] __kasan_slab_alloc+0x59/0x70 [ 30.725635] kmem_cache_alloc+0x16b/0x370 [ 30.725928] vm_area_dup+0x20/0x160 [ 30.726181] __split_vma+0x170/0x950 [ 30.726453] split_vma+0xc6/0x110 [ 30.726698] mprotect_fixup+0x8d2/0xb30 [ 30.726975] do_mprotect_pkey+0x87e/0xd40 [ 30.727264] __x64_sys_mprotect+0x78/0xc0 [ 30.727551] do_syscall_64+0x3f/0x90 [ 30.727814] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.728180] [ 30.728302] Freed by task 213: [ 30.728518] kasan_save_stack+0x22/0x50 [ 30.728801] kasan_set_track+0x25/0x30 [ 30.729075] kasan_save_free_info+0x2b/0x50 [ 30.729369] __kasan_slab_free+0x10a/0x190 [ 30.729663] kmem_cache_free+0x10d/0x4d0 [ 30.729944] rcu_core+0x8c8/0x2860 [ 30.730194] __do_softirq+0x1b7/0x7d4 [ 30.730464] [ 30.730583] Last potentially related work creation: [ 30.730925] kasan_save_stack+0x22/0x50 [ 30.731216] __kasan_record_aux_stack+0x8e/0xa0 [ 30.731552] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.731925] remove_vma+0x139/0x170 [ 30.732192] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.732517] do_vmi_munmap+0x1f1/0x2b0 [ 30.732799] __vm_munmap+0x138/0x3a0 [ 30.733074] __x64_sys_munmap+0x59/0x80 [ 30.733363] do_syscall_64+0x3f/0x90 [ 30.733639] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.734020] [ 30.734147] Second to last potentially related work creation: [ 30.734552] kasan_save_stack+0x22/0x50 [ 30.734840] __kasan_record_aux_stack+0x8e/0xa0 [ 30.735173] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.735546] remove_vma+0x139/0x170 [ 30.735809] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.736133] do_vmi_munmap+0x1f1/0x2b0 [ 30.736410] mmap_region+0x1f9/0x2660 [ 30.736688] do_mmap+0x854/0xf00 [ 30.736934] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.737225] ksys_mmap_pgoff+0x3af/0x500 [ 30.737508] do_syscall_64+0x3f/0x90 [ 30.737783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.738156] [ 30.738280] The buggy address belongs to the object at ffff8880169debc8 [ 30.738280] which belongs to the cache vm_area_struct of size 168 [ 30.739166] The buggy address is located 88 bytes inside of [ 30.739166] freed 168-byte region [ffff8880169debc8, ffff8880169dec70) [ 30.739986] [ 30.740113] The buggy address belongs to the physical page: [ 30.740503] page:000000000a392d9d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x169de [ 30.741150] memcg:ffff888018202d01 [ 30.741397] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.741774] page_type: 0xffffffff() [ 30.742039] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bfe40 dead000000000008 [ 30.742585] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018202d01 [ 30.743120] page dumped because: kasan: bad access detected [ 30.743512] [ 30.743640] Memory state around the buggy address: [ 30.743991] ffff8880169deb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.744499] ffff8880169deb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.745003] >ffff8880169dec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.745520] ^ [ 30.745825] ffff8880169dec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.746334] ffff8880169ded00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.746822] ================================================================== [ 30.747348] Disabling lock debugging due to kernel taint [ 32.725770] BUG: Bad rss-counter state mm:0000000078b2b2e8 type:MM_FILEPAGES val:33 [ 32.726874] BUG: Bad rss-counter state mm:0000000078b2b2e8 type:MM_ANONPAGES val:22 [ 33.285959] BUG: Bad rss-counter state mm:00000000f1d2d6aa type:MM_FILEPAGES val:33 [ 33.287139] BUG: Bad rss-counter state mm:00000000f1d2d6aa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64143' (ECDSA) to the list of known hosts. 2023/06/20 12:35:50 fuzzer started 2023/06/20 12:35:51 dialing manager at localhost:36067 2023/06/20 12:35:51 checking machine... 2023/06/20 12:35:51 checking revisions... [ 33.914062] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:35:51 testing simple program... [ 33.969856] cgroup: Unknown subsys name 'net' [ 34.024638] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:35:50 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6b RBX=fffffbfff0ba7a6b RCX=ffffffff81363cba RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff88806ce09d60 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=1ffff1100d9c7479 R12=0000000000000000 R13=0000000000006610 R14=ffff88806ce3a360 R15=0000000000000000 RIP=ffffffff8180f184 RFL=00000046 [---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 00007ffac5299700 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=00007f3eacdd4618 CR3=00000000099c2000 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=2030353a35333a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a35333a3231203032 XMM08=3d656e696c646d632022656369767265 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=0000000000000001 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=00007f437fe213a0 CR3=0000000013a78000 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=a30270a49b83a18dce477cb498ee7550 XMM02=000000000011aa90ec2efd57dc4c00df XMM03=0000000000121780f2bbb6eab7d71449 XMM04=94abf7bf39c2b16a00000000000ae988 XMM05=19e9129bd510f2350000000000132930 XMM06=cf89117738ea3a430000000000131798 XMM07=e042d86d42eb936e0000000000121a00 XMM08=f2bbb6eab7d71449000000000011aaf0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000