syzkaller login: [ 40.679123] BUG: Bad rss-counter state mm:000000002a660ef4 type:MM_FILEPAGES val:33 [ 40.680720] BUG: Bad rss-counter state mm:000000002a660ef4 type:MM_ANONPAGES val:22 [ 40.839620] ================================================================== [ 40.840918] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.842257] Read of size 8 at addr ffff8880096fec20 by task sshd/219 [ 40.843533] [ 40.843840] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.845098] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.846284] Call Trace: [ 40.846679] [ 40.847027] dump_stack_lvl+0x91/0xf0 [ 40.847619] print_report+0xcc/0x620 [ 40.848201] ? __virt_addr_valid+0x102/0x340 [ 40.848884] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.849631] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.850386] kasan_report+0xbe/0xf0 [ 40.850954] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.851702] vma_interval_tree_remove+0xc75/0xec0 [ 40.852437] vma_prepare+0xc54/0x11a0 [ 40.853024] __split_vma+0x5af/0x950 [ 40.853602] ? __pfx___split_vma+0x10/0x10 [ 40.854245] ? find_held_lock+0x2c/0x110 [ 40.854861] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.855545] ? lock_is_held_type+0x9f/0x120 [ 40.856194] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.856957] ? mtree_range_walk+0x632/0x900 [ 40.857620] ? mas_walk+0x5c7/0x7c0 [ 40.858189] do_vmi_munmap+0x1f1/0x2b0 [ 40.858788] mmap_region+0x1f9/0x2660 [ 40.859360] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.859964] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.860836] ? __pfx_lock_acquire+0x10/0x10 [ 40.861486] ? __pfx_mmap_region+0x10/0x10 [ 40.862134] ? security_mmap_addr+0x7d/0xa0 [ 40.862779] ? get_unmapped_area+0x1f5/0x3f0 [ 40.863450] do_mmap+0x854/0xf00 [ 40.863990] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.864594] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.865270] ksys_mmap_pgoff+0x3af/0x500 [ 40.865851] do_syscall_64+0x3f/0x90 [ 40.866306] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.866916] RIP: 0033:0x7f34eacabd82 [ 40.867345] 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 [ 40.869361] RSP: 002b:00007ffdafee98d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.870213] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f34eacabd82 [ 40.871012] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f34ea0e5000 [ 40.871807] RBP: 00007f34ea0e5000 R08: 0000000000000009 R09: 0000000000001000 [ 40.872633] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558d4613aec0 [ 40.873460] R13: 00007ffdafee98f0 R14: 00007ffdafee9920 R15: 00007ffdafee9c80 [ 40.874297] [ 40.874583] [ 40.874793] Allocated by task 212: [ 40.875209] kasan_save_stack+0x22/0x50 [ 40.875702] kasan_set_track+0x25/0x30 [ 40.876196] __kasan_slab_alloc+0x59/0x70 [ 40.876715] kmem_cache_alloc+0x16b/0x370 [ 40.877230] vm_area_dup+0x20/0x160 [ 40.877667] __split_vma+0x170/0x950 [ 40.878118] split_vma+0xc6/0x110 [ 40.878556] mprotect_fixup+0x8d2/0xb30 [ 40.879045] do_mprotect_pkey+0x87e/0xd40 [ 40.879564] __x64_sys_mprotect+0x78/0xc0 [ 40.880080] do_syscall_64+0x3f/0x90 [ 40.880559] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.881194] [ 40.881401] Freed by task 212: [ 40.881784] kasan_save_stack+0x22/0x50 [ 40.882272] kasan_set_track+0x25/0x30 [ 40.882756] kasan_save_free_info+0x2b/0x50 [ 40.883285] __kasan_slab_free+0x10a/0x190 [ 40.883817] kmem_cache_free+0x10d/0x4d0 [ 40.884366] rcu_core+0x8c8/0x2860 [ 40.884816] __do_softirq+0x1b7/0x7d4 [ 40.885285] [ 40.885499] Last potentially related work creation: [ 40.886064] kasan_save_stack+0x22/0x50 [ 40.886567] __kasan_record_aux_stack+0x8e/0xa0 [ 40.887125] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.887752] remove_vma+0x139/0x170 [ 40.888190] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.888765] do_vmi_munmap+0x1f1/0x2b0 [ 40.889232] __vm_munmap+0x138/0x3a0 [ 40.889689] __x64_sys_munmap+0x59/0x80 [ 40.890176] do_syscall_64+0x3f/0x90 [ 40.890640] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.891264] [ 40.891471] The buggy address belongs to the object at ffff8880096febc8 [ 40.891471] which belongs to the cache vm_area_struct of size 168 [ 40.892920] The buggy address is located 88 bytes inside of [ 40.892920] freed 168-byte region [ffff8880096febc8, ffff8880096fec70) [ 40.894290] [ 40.894505] The buggy address belongs to the physical page: [ 40.895148] page:00000000c7804321 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x96fe [ 40.896217] memcg:ffff8880093c1c01 [ 40.896653] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.897285] page_type: 0xffffffff() [ 40.897727] raw: 0100000000000200 ffff88800879fc80 ffffea00003bf400 dead000000000008 [ 40.898630] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880093c1c01 [ 40.899513] page dumped because: kasan: bad access detected [ 40.900158] [ 40.900365] Memory state around the buggy address: [ 40.900936] ffff8880096feb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.901768] ffff8880096feb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 40.902592] >ffff8880096fec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 40.903426] ^ [ 40.903937] ffff8880096fec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 40.904774] ffff8880096fed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 40.905602] ================================================================== [ 40.906512] Disabling lock debugging due to kernel taint [ 42.956683] BUG: Bad rss-counter state mm:0000000078cb7dc5 type:MM_FILEPAGES val:33 [ 42.957950] BUG: Bad rss-counter state mm:0000000078cb7dc5 type:MM_ANONPAGES val:22 [ 43.382924] BUG: Bad rss-counter state mm:00000000ad391411 type:MM_FILEPAGES val:33 [ 43.384710] BUG: Bad rss-counter state mm:00000000ad391411 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29751' (ECDSA) to the list of known hosts. 2023/06/19 13:12:08 fuzzer started 2023/06/19 13:12:08 dialing manager at localhost:44161 2023/06/19 13:12:08 checking machine... 2023/06/19 13:12:08 checking revisions... [ 44.035957] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:12:09 testing simple program... [ 44.080632] cgroup: Unknown subsys name 'net' [ 44.119693] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:12:06 Registers: info registers vcpu 0 RAX=ffffed1001fa8ef4 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800dd98000 RSI=ffffffff814c84f5 RDI=ffffffff8560b640 RBP=1ffff11001fa8ef4 RSP=ffff88800fd47790 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652988 R15=0000000000092c40 RIP=ffffffff812d8659 RFL=00000282 [--S----] 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 00007f79dd1c1900 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=00007ffd7085e000 CR3=000000000cbe4000 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=0000000000000000 RBX=0000000000000246 RCX=ffffffff812e0423 RDX=0000000000000000 RSI=0000000000000004 RDI=ffffffff85616740 RBP=ffffffff85616740 RSP=ffff888008e57cf8 R8 =0000000000000000 R9 =fffffbfff0ac2ce8 R10=ffffffff85616743 R11=1ffff1100d9e7479 R12=ffffffff85616740 R13=0000000000000246 R14=0000000000006d3d R15=ffff88806cf3a2d2 RIP=ffffffff81534210 RFL=00000002 [-------] 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=00007fea18f0b269 CR3=000000000de1e000 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=756e696c2d34365f3638782f62696c2f XMM01=2e6f732e6c736e62696c2f756e672d78 XMM02=00322e6f732e6c736e62696c2f756e67 XMM03=2d78756e696c2d34365f3638782f6269 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000