syzkaller login: [ 30.280138] BUG: Bad rss-counter state mm:000000009a82de46 type:MM_FILEPAGES val:33 [ 30.281382] BUG: Bad rss-counter state mm:000000009a82de46 type:MM_ANONPAGES val:22 [ 30.351503] ================================================================== [ 30.352418] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.353350] Read of size 8 at addr ffff88800908b310 by task sshd/220 [ 30.354121] [ 30.354405] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.355281] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.356255] Call Trace: [ 30.356575] [ 30.356865] dump_stack_lvl+0x91/0xf0 [ 30.357377] print_report+0xcc/0x620 [ 30.357864] ? __virt_addr_valid+0x102/0x340 [ 30.358437] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.359077] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.359690] kasan_report+0xbe/0xf0 [ 30.360174] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.360797] vma_interval_tree_remove+0xc75/0xec0 [ 30.361403] vma_prepare+0xc54/0x11a0 [ 30.361885] __split_vma+0x5af/0x950 [ 30.362365] ? __pfx___split_vma+0x10/0x10 [ 30.362905] ? find_held_lock+0x2c/0x110 [ 30.363431] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.363997] ? lock_is_held_type+0x9f/0x120 [ 30.364540] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.365147] ? mtree_range_walk+0x632/0x900 [ 30.365701] ? mas_walk+0x5c7/0x7c0 [ 30.366178] do_vmi_munmap+0x1f1/0x2b0 [ 30.366677] mmap_region+0x1f9/0x2660 [ 30.367184] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.367704] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.368426] ? __pfx_lock_acquire+0x10/0x10 [ 30.368961] ? __pfx_mmap_region+0x10/0x10 [ 30.369494] ? security_mmap_addr+0x7d/0xa0 [ 30.370030] ? get_unmapped_area+0x1f5/0x3f0 [ 30.370580] do_mmap+0x854/0xf00 [ 30.371024] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.371524] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.372092] ksys_mmap_pgoff+0x3af/0x500 [ 30.372607] do_syscall_64+0x3f/0x90 [ 30.373080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.373739] RIP: 0033:0x7fb6c77a9d82 [ 30.374198] 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 [ 30.376355] RSP: 002b:00007ffd6324ba08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.377266] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb6c77a9d82 [ 30.378112] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb6c6be3000 [ 30.378971] RBP: 00007fb6c6be3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.379821] R10: 0000000000000812 R11: 0000000000000206 R12: 000055840e0b4ec0 [ 30.380674] R13: 00007ffd6324ba20 R14: 00007ffd6324ba50 R15: 00007ffd6324bdb0 [ 30.381537] [ 30.381827] [ 30.382046] Allocated by task 213: [ 30.382475] kasan_save_stack+0x22/0x50 [ 30.382986] kasan_set_track+0x25/0x30 [ 30.383482] __kasan_slab_alloc+0x59/0x70 [ 30.384003] kmem_cache_alloc+0x16b/0x370 [ 30.384523] vm_area_dup+0x20/0x160 [ 30.384976] __split_vma+0x170/0x950 [ 30.385446] split_vma+0xc6/0x110 [ 30.385887] mprotect_fixup+0x8d2/0xb30 [ 30.386392] do_mprotect_pkey+0x87e/0xd40 [ 30.386929] __x64_sys_mprotect+0x78/0xc0 [ 30.387453] do_syscall_64+0x3f/0x90 [ 30.387932] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.388577] [ 30.388792] Freed by task 213: [ 30.389187] kasan_save_stack+0x22/0x50 [ 30.389691] kasan_set_track+0x25/0x30 [ 30.390183] kasan_save_free_info+0x2b/0x50 [ 30.390718] __kasan_slab_free+0x10a/0x190 [ 30.391267] kmem_cache_free+0x10d/0x4d0 [ 30.391775] rcu_core+0x8c8/0x2860 [ 30.392213] __do_softirq+0x1b7/0x7d4 [ 30.392691] [ 30.392907] Last potentially related work creation: [ 30.393492] kasan_save_stack+0x22/0x50 [ 30.393994] __kasan_record_aux_stack+0x8e/0xa0 [ 30.394573] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.395230] remove_vma+0x139/0x170 [ 30.395687] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.396251] do_vmi_munmap+0x1f1/0x2b0 [ 30.396732] __vm_munmap+0x138/0x3a0 [ 30.397197] __x64_sys_munmap+0x59/0x80 [ 30.397689] do_syscall_64+0x3f/0x90 [ 30.398170] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.398813] [ 30.399038] The buggy address belongs to the object at ffff88800908b2b8 [ 30.399038] which belongs to the cache vm_area_struct of size 168 [ 30.400514] The buggy address is located 88 bytes inside of [ 30.400514] freed 168-byte region [ffff88800908b2b8, ffff88800908b360) [ 30.401922] [ 30.402139] The buggy address belongs to the physical page: [ 30.402803] page:00000000fce44185 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x908b [ 30.403896] memcg:ffff88800683b701 [ 30.404326] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.404972] page_type: 0xffffffff() [ 30.405427] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.406348] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800683b701 [ 30.407300] page dumped because: kasan: bad access detected [ 30.407966] [ 30.408185] Memory state around the buggy address: [ 30.408772] ffff88800908b200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.409628] ffff88800908b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.410487] >ffff88800908b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.411354] ^ [ 30.411821] ffff88800908b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.412680] ffff88800908b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.413539] ================================================================== [ 30.414505] Disabling lock debugging due to kernel taint [ 32.377084] BUG: Bad rss-counter state mm:0000000071b2d00d type:MM_FILEPAGES val:33 [ 32.378582] BUG: Bad rss-counter state mm:0000000071b2d00d type:MM_ANONPAGES val:22 [ 32.848296] BUG: Bad rss-counter state mm:0000000015a5b08e type:MM_FILEPAGES val:33 [ 32.849355] BUG: Bad rss-counter state mm:0000000015a5b08e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57953' (ECDSA) to the list of known hosts. 2023/06/20 22:49:44 fuzzer started 2023/06/20 22:49:44 dialing manager at localhost:36067 2023/06/20 22:49:44 checking machine... 2023/06/20 22:49:44 checking revisions... [ 33.637837] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:49:44 testing simple program... [ 33.684701] cgroup: Unknown subsys name 'net' [ 33.720934] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:49:43 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=00007feb5ab72970 CR3=000000000c92e000 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=00000000000000000000000000000000 XMM01=19cb7f509d4b7f8a084c9dac3b4159f4 XMM02=000000000011d128ec2efd57dc4c00df XMM03=0000000000121520f1b69fb877dc3697 XMM04=86fc3000e8f6324100000000000ae988 XMM05=19e9129bd510f2350000000000131650 XMM06=1c86f0159ed1f63000000000001304b8 XMM07=e042d86d42eb936e00000000001217a0 XMM08=f1b69fb877dc3697000000000011d188 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800ec58be0 RCX=ffff88800844f780 RDX=ffffea00003bf780 RSI=ffff88800efdee40 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff88800c527a38 R8 =ffff88800efde390 R9 =0000000000000000 R10=ffffea00003bf780 R11=00000000000d0006 R12=dffffc0000000000 R13=ffff88800c527a78 R14=ffff88800844f780 R15=ffff88800efdee40 RIP=ffffffff81810316 RFL=00000202 [-------] 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 00007f4794915900 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=00007ffd3b835000 CR3=00000000182c4000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000