syzkaller login: [ 30.692460] BUG: Bad rss-counter state mm:000000006e6ce94f type:MM_FILEPAGES val:33 [ 30.694206] BUG: Bad rss-counter state mm:000000006e6ce94f type:MM_ANONPAGES val:22 [ 30.857471] ================================================================== [ 30.858423] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.859363] Read of size 8 at addr ffff8880167be228 by task sshd/219 [ 30.860126] [ 30.860354] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.861306] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.862277] Call Trace: [ 30.862596] [ 30.862876] dump_stack_lvl+0x91/0xf0 [ 30.863365] print_report+0xcc/0x620 [ 30.863841] ? __virt_addr_valid+0x102/0x340 [ 30.864386] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.864995] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.865622] kasan_report+0xbe/0xf0 [ 30.866105] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.866728] vma_interval_tree_remove+0xc75/0xec0 [ 30.867322] vma_prepare+0xc54/0x11a0 [ 30.867791] __split_vma+0x5af/0x950 [ 30.868259] ? __pfx___split_vma+0x10/0x10 [ 30.868785] ? find_held_lock+0x2c/0x110 [ 30.869305] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.869871] ? lock_is_held_type+0x9f/0x120 [ 30.870405] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.871013] ? mtree_range_walk+0x632/0x900 [ 30.871573] ? mas_walk+0x5c7/0x7c0 [ 30.872059] do_vmi_munmap+0x1f1/0x2b0 [ 30.872571] mmap_region+0x1f9/0x2660 [ 30.873072] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.873625] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.874361] ? __pfx_lock_acquire+0x10/0x10 [ 30.874905] ? __pfx_mmap_region+0x10/0x10 [ 30.875453] ? security_mmap_addr+0x7d/0xa0 [ 30.875999] ? get_unmapped_area+0x1f5/0x3f0 [ 30.876569] do_mmap+0x854/0xf00 [ 30.877016] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.877523] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.878118] ksys_mmap_pgoff+0x3af/0x500 [ 30.878641] do_syscall_64+0x3f/0x90 [ 30.879136] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.879805] RIP: 0033:0x7f92f028ed82 [ 30.880282] 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 [ 30.882543] RSP: 002b:00007ffe443c6778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.883482] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f92f028ed82 [ 30.884363] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f92ef6c8000 [ 30.885248] RBP: 00007f92ef6c8000 R08: 0000000000000009 R09: 0000000000001000 [ 30.886137] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fda4c48ec0 [ 30.887010] R13: 00007ffe443c6790 R14: 00007ffe443c67c0 R15: 00007ffe443c6b20 [ 30.887903] [ 30.888203] [ 30.888424] Allocated by task 212: [ 30.888866] kasan_save_stack+0x22/0x50 [ 30.889389] kasan_set_track+0x25/0x30 [ 30.889927] __kasan_slab_alloc+0x59/0x70 [ 30.890470] kmem_cache_alloc+0x16b/0x370 [ 30.891013] vm_area_dup+0x20/0x160 [ 30.891489] __split_vma+0x170/0x950 [ 30.892002] split_vma+0xc6/0x110 [ 30.892466] mprotect_fixup+0x8d2/0xb30 [ 30.892988] do_mprotect_pkey+0x87e/0xd40 [ 30.893528] __x64_sys_mprotect+0x78/0xc0 [ 30.894097] do_syscall_64+0x3f/0x90 [ 30.894594] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.895266] [ 30.895488] Freed by task 212: [ 30.895912] kasan_save_stack+0x22/0x50 [ 30.896442] kasan_set_track+0x25/0x30 [ 30.896951] kasan_save_free_info+0x2b/0x50 [ 30.897505] __kasan_slab_free+0x10a/0x190 [ 30.898081] kmem_cache_free+0x10d/0x4d0 [ 30.898613] rcu_core+0x8c8/0x2860 [ 30.899094] __do_softirq+0x1b7/0x7d4 [ 30.899592] [ 30.899816] Last potentially related work creation: [ 30.900439] kasan_save_stack+0x22/0x50 [ 30.900963] __kasan_record_aux_stack+0x8e/0xa0 [ 30.901565] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.902259] remove_vma+0x139/0x170 [ 30.902726] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.903307] do_vmi_munmap+0x1f1/0x2b0 [ 30.903812] __vm_munmap+0x138/0x3a0 [ 30.904296] __x64_sys_munmap+0x59/0x80 [ 30.904833] do_syscall_64+0x3f/0x90 [ 30.905324] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.906016] [ 30.906241] The buggy address belongs to the object at ffff8880167be1d0 [ 30.906241] which belongs to the cache vm_area_struct of size 168 [ 30.907806] The buggy address is located 88 bytes inside of [ 30.907806] freed 168-byte region [ffff8880167be1d0, ffff8880167be278) [ 30.909322] [ 30.909569] The buggy address belongs to the physical page: [ 30.910274] page:00000000c2e2dace refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x167be [ 30.911421] memcg:ffff888019445b01 [ 30.911864] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.912535] page_type: 0xffffffff() [ 30.913004] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.913971] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019445b01 [ 30.914871] page dumped because: kasan: bad access detected [ 30.915535] [ 30.915753] Memory state around the buggy address: [ 30.916338] ffff8880167be100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.917195] ffff8880167be180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.918057] >ffff8880167be200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.918895] ^ [ 30.919456] ffff8880167be280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.920320] ffff8880167be300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.921176] ================================================================== [ 30.922485] Disabling lock debugging due to kernel taint [ 32.757164] BUG: Bad rss-counter state mm:00000000037aa3ac type:MM_FILEPAGES val:33 [ 32.758341] BUG: Bad rss-counter state mm:00000000037aa3ac type:MM_ANONPAGES val:22 [ 33.143299] BUG: Bad rss-counter state mm:00000000087ee405 type:MM_FILEPAGES val:33 [ 33.144568] BUG: Bad rss-counter state mm:00000000087ee405 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38535' (ECDSA) to the list of known hosts. 2023/06/20 11:06:26 fuzzer started 2023/06/20 11:06:26 dialing manager at localhost:36067 2023/06/20 11:06:26 checking machine... 2023/06/20 11:06:26 checking revisions... [ 33.851858] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:06:27 testing simple program... [ 33.902277] cgroup: Unknown subsys name 'net' [ 33.941479] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:06:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864b202c RDX=0000000000000001 RSI=0000000000000000 RDI=ffffffff864b202e RBP=ffff8880195af580 RSP=ffff8880195af4b8 R8 =0000000000000001 R9 =ffff8880195af568 R10=0000000000038001 R11=00000000000b5080 R12=ffff8880195af588 R13=ffff8880195af570 R14=ffff8880195aff58 R15=ffff8880195af528 RIP=ffffffff81131204 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 00007fe20d95a700 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=00007f153c2ff0b0 CR3=000000000f66e000 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=2036323a36303a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a36303a3131203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000016b195b528 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000016 RSI=ffff88806cf28140 RDI=00000000000542f8 RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000f0fb8 R11=ffff88806cf09ff8 R12=00000000000542f8 R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff81106295 RFL=00000013 [----A-C] 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=00007ff234d37b10 CR3=000000000c76a000 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=69bf4b2aef605aa636497c939ed49b18 XMM02=ec2efd57dc4c00df000000000011a540 XMM03=0ede23ff5eea1faf000000000011a610 XMM04=e305ccae7996333800000000000ae988 XMM05=dfcdbad4f1609c370000000000131920 XMM06=806171799158d96700000000001317a8 XMM07=e042d86d42eb936e0000000000121cd0 XMM08=0ede23ff5eea1faf000000000011a610 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000