syzkaller login: [ 31.596474] BUG: Bad rss-counter state mm:00000000709c9244 type:MM_FILEPAGES val:33 [ 31.597714] BUG: Bad rss-counter state mm:00000000709c9244 type:MM_ANONPAGES val:22 [ 31.637853] ================================================================== [ 31.638805] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.639798] Read of size 8 at addr ffff888018ec9880 by task sshd/220 [ 31.640777] [ 31.641007] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.641923] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.642978] Call Trace: [ 31.643319] [ 31.643617] dump_stack_lvl+0x91/0xf0 [ 31.644143] print_report+0xcc/0x620 [ 31.644653] ? __virt_addr_valid+0x102/0x340 [ 31.645228] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.645867] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.646511] kasan_report+0xbe/0xf0 [ 31.647013] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.647660] vma_interval_tree_remove+0xc75/0xec0 [ 31.648299] vma_prepare+0xc54/0x11a0 [ 31.648797] __split_vma+0x5af/0x950 [ 31.649289] ? __pfx___split_vma+0x10/0x10 [ 31.649840] ? find_held_lock+0x2c/0x110 [ 31.650382] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.650973] ? lock_is_held_type+0x9f/0x120 [ 31.651531] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.652184] ? mtree_range_walk+0x632/0x900 [ 31.652757] ? mas_walk+0x5c7/0x7c0 [ 31.653251] do_vmi_munmap+0x1f1/0x2b0 [ 31.653761] mmap_region+0x1f9/0x2660 [ 31.654260] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.654790] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.655522] ? __pfx_lock_acquire+0x10/0x10 [ 31.656077] ? __pfx_mmap_region+0x10/0x10 [ 31.656627] ? security_mmap_addr+0x7d/0xa0 [ 31.657174] ? get_unmapped_area+0x1f5/0x3f0 [ 31.657740] do_mmap+0x854/0xf00 [ 31.658191] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.658700] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.659277] ksys_mmap_pgoff+0x3af/0x500 [ 31.659806] do_syscall_64+0x3f/0x90 [ 31.660308] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.660972] RIP: 0033:0x7f8546b11d82 [ 31.661452] 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 [ 31.663626] RSP: 002b:00007fff798458d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.664571] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8546b11d82 [ 31.665443] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8545f4b000 [ 31.666304] RBP: 00007f8545f4b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.667166] R10: 0000000000000812 R11: 0000000000000206 R12: 000055988a197ec0 [ 31.668039] R13: 00007fff798458f0 R14: 00007fff79845920 R15: 00007fff79845c80 [ 31.668923] [ 31.669224] [ 31.669444] Allocated by task 213: [ 31.669879] kasan_save_stack+0x22/0x50 [ 31.670396] kasan_set_track+0x25/0x30 [ 31.670904] __kasan_slab_alloc+0x59/0x70 [ 31.671441] kmem_cache_alloc+0x16b/0x370 [ 31.671966] vm_area_dup+0x20/0x160 [ 31.672461] __split_vma+0x170/0x950 [ 31.672941] split_vma+0xc6/0x110 [ 31.673390] mprotect_fixup+0x8d2/0xb30 [ 31.673901] do_mprotect_pkey+0x87e/0xd40 [ 31.674436] __x64_sys_mprotect+0x78/0xc0 [ 31.674969] do_syscall_64+0x3f/0x90 [ 31.675458] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.676123] [ 31.676350] Freed by task 213: [ 31.676751] kasan_save_stack+0x22/0x50 [ 31.677267] kasan_set_track+0x25/0x30 [ 31.677774] kasan_save_free_info+0x2b/0x50 [ 31.678318] __kasan_slab_free+0x10a/0x190 [ 31.678863] kmem_cache_free+0x10d/0x4d0 [ 31.679380] rcu_core+0x8c8/0x2860 [ 31.679834] __do_softirq+0x1b7/0x7d4 [ 31.680330] [ 31.680548] Last potentially related work creation: [ 31.681139] kasan_save_stack+0x22/0x50 [ 31.681654] __kasan_record_aux_stack+0x8e/0xa0 [ 31.682235] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.682890] remove_vma+0x139/0x170 [ 31.683347] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.683915] do_vmi_munmap+0x1f1/0x2b0 [ 31.684431] __vm_munmap+0x138/0x3a0 [ 31.684907] __x64_sys_munmap+0x59/0x80 [ 31.685417] do_syscall_64+0x3f/0x90 [ 31.685906] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.686570] [ 31.686789] The buggy address belongs to the object at ffff888018ec9828 [ 31.686789] which belongs to the cache vm_area_struct of size 168 [ 31.688290] The buggy address is located 88 bytes inside of [ 31.688290] freed 168-byte region [ffff888018ec9828, ffff888018ec98d0) [ 31.689732] [ 31.689950] The buggy address belongs to the physical page: [ 31.690615] page:000000009e5f90e8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18ec9 [ 31.691725] memcg:ffff888018ec3701 [ 31.692172] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.692885] page_type: 0xffffffff() [ 31.693338] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.694271] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018ec3701 [ 31.695187] page dumped because: kasan: bad access detected [ 31.695861] [ 31.696090] Memory state around the buggy address: [ 31.696675] ffff888018ec9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.697539] ffff888018ec9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.698403] >ffff888018ec9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.699263] ^ [ 31.699681] ffff888018ec9900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.700567] ffff888018ec9980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.701422] ================================================================== [ 31.702496] Disabling lock debugging due to kernel taint [ 34.357274] BUG: Bad rss-counter state mm:00000000c5034e22 type:MM_FILEPAGES val:33 [ 34.358455] BUG: Bad rss-counter state mm:00000000c5034e22 type:MM_ANONPAGES val:22 [ 34.847536] BUG: Bad rss-counter state mm:000000009dc34f0a type:MM_FILEPAGES val:33 [ 34.848592] BUG: Bad rss-counter state mm:000000009dc34f0a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26353' (ECDSA) to the list of known hosts. 2023/06/21 06:03:56 fuzzer started 2023/06/21 06:03:56 dialing manager at localhost:36067 2023/06/21 06:03:56 checking machine... 2023/06/21 06:03:56 checking revisions... [ 35.567559] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:03:56 testing simple program... [ 35.625921] cgroup: Unknown subsys name 'net' [ 35.679599] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:03:56 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fff4fa8c698 CR3=000000000c658000 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=2035353a33303a3630203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a33303a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800d6b7dd0 RCX=0000000000000001 RDX=1ffff11001ad6f02 RSI=ffff88800d6b7da0 RDI=ffff88800d6b7810 RBP=ffff88800d6b0000 RSP=ffff88800d6b7790 R8 =0000000000000001 R9 =ffff88800d6b7840 R10=0000000000038001 R11=0000000000023906 R12=ffff88800d6b7860 R13=ffff88800d6b7848 R14=ffff88800d6b7da0 R15=ffff88800d6b7800 RIP=ffffffff81131ca6 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 00007f3801b51900 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=00007fc2fd400650 CR3=000000000d9c4000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=12295c6a6e2ffcf000000000000ae988 XMM05=532eed5b87e5761e0000000000132980 XMM06=4fda316b135da52b0000000000131770 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000