syzkaller login: [ 38.712358] BUG: Bad rss-counter state mm:000000007e879efa type:MM_FILEPAGES val:33 [ 38.713663] BUG: Bad rss-counter state mm:000000007e879efa type:MM_ANONPAGES val:22 [ 38.857852] ================================================================== [ 38.858812] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.859759] Read of size 8 at addr ffff88800df08b38 by task sshd/218 [ 38.860685] [ 38.860906] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.861811] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.862873] Call Trace: [ 38.863198] [ 38.863487] dump_stack_lvl+0x91/0xf0 [ 38.863999] print_report+0xcc/0x620 [ 38.864488] ? __virt_addr_valid+0x102/0x340 [ 38.865051] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.865687] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.866305] kasan_report+0xbe/0xf0 [ 38.866812] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.867436] vma_interval_tree_remove+0xc75/0xec0 [ 38.868054] vma_prepare+0xc54/0x11a0 [ 38.868542] __split_vma+0x5af/0x950 [ 38.869023] ? __pfx___split_vma+0x10/0x10 [ 38.869566] ? find_held_lock+0x2c/0x110 [ 38.870107] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.870695] ? lock_is_held_type+0x9f/0x120 [ 38.871263] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.871886] ? mtree_range_walk+0x632/0x900 [ 38.872437] ? mas_walk+0x5c7/0x7c0 [ 38.872937] do_vmi_munmap+0x1f1/0x2b0 [ 38.873431] mmap_region+0x1f9/0x2660 [ 38.873941] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.874459] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.875220] ? __pfx_lock_acquire+0x10/0x10 [ 38.875769] ? __pfx_mmap_region+0x10/0x10 [ 38.876304] ? security_mmap_addr+0x7d/0xa0 [ 38.876852] ? get_unmapped_area+0x1f5/0x3f0 [ 38.877407] do_mmap+0x854/0xf00 [ 38.877876] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.878381] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.878982] ksys_mmap_pgoff+0x3af/0x500 [ 38.879497] do_syscall_64+0x3f/0x90 [ 38.879994] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.880661] RIP: 0033:0x7fd10bba3d82 [ 38.881123] 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 [ 38.883313] RSP: 002b:00007ffe1ab47d28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.884241] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd10bba3d82 [ 38.885103] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd10afdd000 [ 38.885977] RBP: 00007fd10afdd000 R08: 0000000000000009 R09: 0000000000001000 [ 38.886849] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c898dd3ec0 [ 38.887722] R13: 00007ffe1ab47d40 R14: 00007ffe1ab47d70 R15: 00007ffe1ab480d0 [ 38.888583] [ 38.888879] [ 38.889100] Allocated by task 211: [ 38.889544] kasan_save_stack+0x22/0x50 [ 38.890209] kasan_set_track+0x25/0x30 [ 38.890847] __kasan_slab_alloc+0x59/0x70 [ 38.891377] kmem_cache_alloc+0x16b/0x370 [ 38.891914] vm_area_dup+0x20/0x160 [ 38.892370] __split_vma+0x170/0x950 [ 38.892855] split_vma+0xc6/0x110 [ 38.893301] mprotect_fixup+0x8d2/0xb30 [ 38.893837] do_mprotect_pkey+0x87e/0xd40 [ 38.894361] __x64_sys_mprotect+0x78/0xc0 [ 38.894934] do_syscall_64+0x3f/0x90 [ 38.895412] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.896074] [ 38.896297] Freed by task 211: [ 38.896710] kasan_save_stack+0x22/0x50 [ 38.897220] kasan_set_track+0x25/0x30 [ 38.897740] kasan_save_free_info+0x2b/0x50 [ 38.898278] __kasan_slab_free+0x10a/0x190 [ 38.898838] kmem_cache_free+0x10d/0x4d0 [ 38.899348] rcu_core+0x8c8/0x2860 [ 38.899816] __do_softirq+0x1b7/0x7d4 [ 38.900302] [ 38.900521] Last potentially related work creation: [ 38.901120] kasan_save_stack+0x22/0x50 [ 38.901719] __kasan_record_aux_stack+0x8e/0xa0 [ 38.902298] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.902989] remove_vma+0x139/0x170 [ 38.903452] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.904060] do_vmi_munmap+0x1f1/0x2b0 [ 38.904557] __vm_munmap+0x138/0x3a0 [ 38.905038] __x64_sys_munmap+0x59/0x80 [ 38.905550] do_syscall_64+0x3f/0x90 [ 38.906043] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.906734] [ 38.906954] Second to last potentially related work creation: [ 38.907653] kasan_save_stack+0x22/0x50 [ 38.908162] __kasan_record_aux_stack+0x8e/0xa0 [ 38.908746] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.909385] remove_vma+0x139/0x170 [ 38.909852] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.910405] do_vmi_munmap+0x1f1/0x2b0 [ 38.910946] mmap_region+0x1f9/0x2660 [ 38.911426] do_mmap+0x854/0xf00 [ 38.911885] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.912379] ksys_mmap_pgoff+0x3af/0x500 [ 38.912903] do_syscall_64+0x3f/0x90 [ 38.913382] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.914046] [ 38.914264] The buggy address belongs to the object at ffff88800df08ae0 [ 38.914264] which belongs to the cache vm_area_struct of size 168 [ 38.915788] The buggy address is located 88 bytes inside of [ 38.915788] freed 168-byte region [ffff88800df08ae0, ffff88800df08b88) [ 38.917211] [ 38.917429] The buggy address belongs to the physical page: [ 38.918109] page:00000000a254a715 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf08 [ 38.919232] memcg:ffff88800e05eb01 [ 38.919687] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.920337] page_type: 0xffffffff() [ 38.920812] raw: 0100000000000200 ffff8880087a0c80 ffffea0000679e80 dead000000000008 [ 38.921757] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e05eb01 [ 38.922691] page dumped because: kasan: bad access detected [ 38.923418] [ 38.923653] Memory state around the buggy address: [ 38.924245] ffff88800df08a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.925118] ffff88800df08a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 38.925991] >ffff88800df08b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.926909] ^ [ 38.927558] ffff88800df08b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 38.928461] ffff88800df08c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.929353] ================================================================== [ 38.930346] Disabling lock debugging due to kernel taint [ 41.348349] BUG: Bad rss-counter state mm:0000000038c3b0b1 type:MM_FILEPAGES val:33 [ 41.349508] BUG: Bad rss-counter state mm:0000000038c3b0b1 type:MM_ANONPAGES val:22 [ 41.821828] BUG: Bad rss-counter state mm:00000000b3e105e3 type:MM_FILEPAGES val:33 [ 41.823030] BUG: Bad rss-counter state mm:00000000b3e105e3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29172' (ECDSA) to the list of known hosts. 2023/06/20 14:09:28 fuzzer started 2023/06/20 14:09:28 dialing manager at localhost:36067 2023/06/20 14:09:28 checking machine... 2023/06/20 14:09:28 checking revisions... [ 42.495433] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:09:28 testing simple program... [ 42.551679] cgroup: Unknown subsys name 'net' [ 42.609830] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:09:28 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff11002f8fe9b RCX=ffffffff812d8f13 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff888017c7f4c8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8f13 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 00007f116d683700 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=00007fd3074560b0 CR3=000000000e5f6000 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=2037323a39303a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a39303a3431203032 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=00007fbf50818200 CR3=000000000f372000 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=c9a390f8bf3fcfbf8f45cbb7e9c72d6d XMM02=000000000011b208eff9b2d0a8fce9cb XMM03=000000000011b2d82c67c8bc2e329bc3 XMM04=f35e0d897d18b3cf00000000000ae988 XMM05=751b9502027dc0b90000000000132b30 XMM06=6c0600e83fe831a60000000000131d08 XMM07=e042d86d42eb936e0000000000121f10 XMM08=dd3f9ef2f3da47b4000000000011b2d8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000