syzkaller login: [ 39.241311] BUG: Bad rss-counter state mm:0000000034b6c056 type:MM_FILEPAGES val:33 [ 39.242644] BUG: Bad rss-counter state mm:0000000034b6c056 type:MM_ANONPAGES val:22 [ 39.394135] ================================================================== [ 39.395095] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.396055] Read of size 8 at addr ffff88800e6783f8 by task sshd/220 [ 39.396980] [ 39.397199] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.398109] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.399135] Call Trace: [ 39.399458] [ 39.399743] dump_stack_lvl+0x91/0xf0 [ 39.400239] print_report+0xcc/0x620 [ 39.400730] ? __virt_addr_valid+0x102/0x340 [ 39.401298] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.401948] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.402573] kasan_report+0xbe/0xf0 [ 39.403059] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.403693] vma_interval_tree_remove+0xc75/0xec0 [ 39.404298] vma_prepare+0xc54/0x11a0 [ 39.404785] __split_vma+0x5af/0x950 [ 39.405268] ? __pfx___split_vma+0x10/0x10 [ 39.405823] ? find_held_lock+0x2c/0x110 [ 39.406354] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.406930] ? lock_is_held_type+0x9f/0x120 [ 39.407489] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.408098] ? mtree_range_walk+0x632/0x900 [ 39.408656] ? mas_walk+0x5c7/0x7c0 [ 39.409137] do_vmi_munmap+0x1f1/0x2b0 [ 39.409659] mmap_region+0x1f9/0x2660 [ 39.410145] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.410663] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.411391] ? __pfx_lock_acquire+0x10/0x10 [ 39.411932] ? __pfx_mmap_region+0x10/0x10 [ 39.412470] ? security_mmap_addr+0x7d/0xa0 [ 39.413036] ? get_unmapped_area+0x1f5/0x3f0 [ 39.413591] do_mmap+0x854/0xf00 [ 39.414048] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.414549] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.415111] ksys_mmap_pgoff+0x3af/0x500 [ 39.415623] do_syscall_64+0x3f/0x90 [ 39.416098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.416743] RIP: 0033:0x7f41bc711d82 [ 39.417206] 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 [ 39.419362] RSP: 002b:00007ffc1b5fd988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.420280] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f41bc711d82 [ 39.421126] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f41bbb4b000 [ 39.421988] RBP: 00007f41bbb4b000 R08: 0000000000000009 R09: 0000000000001000 [ 39.422824] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562275851ec0 [ 39.423662] R13: 00007ffc1b5fd9a0 R14: 00007ffc1b5fd9d0 R15: 00007ffc1b5fdd30 [ 39.424508] [ 39.424798] [ 39.425011] Allocated by task 213: [ 39.425436] kasan_save_stack+0x22/0x50 [ 39.425947] kasan_set_track+0x25/0x30 [ 39.426437] __kasan_slab_alloc+0x59/0x70 [ 39.426958] kmem_cache_alloc+0x16b/0x370 [ 39.427470] vm_area_dup+0x20/0x160 [ 39.427920] __split_vma+0x170/0x950 [ 39.428383] split_vma+0xc6/0x110 [ 39.428827] mprotect_fixup+0x8d2/0xb30 [ 39.429370] do_mprotect_pkey+0x87e/0xd40 [ 39.429915] __x64_sys_mprotect+0x78/0xc0 [ 39.430454] do_syscall_64+0x3f/0x90 [ 39.430936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.431590] [ 39.431810] Freed by task 213: [ 39.432214] kasan_save_stack+0x22/0x50 [ 39.432738] kasan_set_track+0x25/0x30 [ 39.433243] kasan_save_free_info+0x2b/0x50 [ 39.433793] __kasan_slab_free+0x10a/0x190 [ 39.434337] kmem_cache_free+0x10d/0x4d0 [ 39.434854] rcu_core+0x8c8/0x2860 [ 39.435306] __do_softirq+0x1b7/0x7d4 [ 39.435801] [ 39.436031] Last potentially related work creation: [ 39.436630] kasan_save_stack+0x22/0x50 [ 39.437145] __kasan_record_aux_stack+0x8e/0xa0 [ 39.437802] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.438463] remove_vma+0x139/0x170 [ 39.438931] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.439508] do_vmi_munmap+0x1f1/0x2b0 [ 39.440010] __vm_munmap+0x138/0x3a0 [ 39.440500] __x64_sys_munmap+0x59/0x80 [ 39.441014] do_syscall_64+0x3f/0x90 [ 39.441504] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.442180] [ 39.442404] The buggy address belongs to the object at ffff88800e6783a0 [ 39.442404] which belongs to the cache vm_area_struct of size 168 [ 39.443950] The buggy address is located 88 bytes inside of [ 39.443950] freed 168-byte region [ffff88800e6783a0, ffff88800e678448) [ 39.445412] [ 39.445654] The buggy address belongs to the physical page: [ 39.446346] page:00000000a4bab06f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe678 [ 39.447470] memcg:ffff88800e3f5b01 [ 39.447911] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.448579] page_type: 0xffffffff() [ 39.449047] raw: 0100000000000200 ffff88800879fc80 ffffea000040a400 dead000000000002 [ 39.450010] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3f5b01 [ 39.450919] page dumped because: kasan: bad access detected [ 39.451589] [ 39.451803] Memory state around the buggy address: [ 39.452388] ffff88800e678280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.453258] ffff88800e678300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.454126] >ffff88800e678380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.455008] ^ [ 39.455878] ffff88800e678400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.456752] ffff88800e678480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.457604] ================================================================== [ 39.458620] Disabling lock debugging due to kernel taint [ 41.235516] BUG: Bad rss-counter state mm:000000009bcf7527 type:MM_FILEPAGES val:33 [ 41.236823] BUG: Bad rss-counter state mm:000000009bcf7527 type:MM_ANONPAGES val:22 [ 41.707777] BUG: Bad rss-counter state mm:00000000f65960de type:MM_FILEPAGES val:33 [ 41.708829] BUG: Bad rss-counter state mm:00000000f65960de type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46651' (ECDSA) to the list of known hosts. 2023/06/19 16:51:43 fuzzer started 2023/06/19 16:51:43 dialing manager at localhost:44161 2023/06/19 16:51:43 checking machine... 2023/06/19 16:51:43 checking revisions... [ 42.395246] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:51:43 testing simple program... [ 42.447914] cgroup: Unknown subsys name 'net' [ 42.498623] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:51:42 Registers: info registers vcpu 0 RAX=ffffffff8617a0a9 RBX=0000000000000001 RCX=ffffffff8617a0a8 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff8617a0ac R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000002bf7a R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff888018077d40 R15=ffff88806ce09a98 RIP=ffffffff81130b99 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 00007f026a939900 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=00007ffc1a808000 CR3=0000000018266000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f9933b97860 CR3=0000000015e4a000 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=2032343a31353a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a31353a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000