syzkaller login: [ 90.487884] BUG: Bad rss-counter state mm:000000008dc8b85e type:MM_FILEPAGES val:33 [ 90.489119] BUG: Bad rss-counter state mm:000000008dc8b85e type:MM_ANONPAGES val:22 [ 90.524867] ================================================================== [ 90.525651] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 90.526369] Read of size 8 at addr ffff8880181e6a50 by task sshd/221 [ 90.526963] [ 90.527132] CPU: 0 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 90.527931] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 90.528688] Call Trace: [ 90.529026] [ 90.529247] dump_stack_lvl+0x91/0xf0 [ 90.529644] print_report+0xcc/0x620 [ 90.529974] ? __virt_addr_valid+0x102/0x340 [ 90.530285] ? vma_interval_tree_remove+0xc75/0xec0 [ 90.530628] ? vma_interval_tree_remove+0xc75/0xec0 [ 90.530969] kasan_report+0xbe/0xf0 [ 90.531258] ? vma_interval_tree_remove+0xc75/0xec0 [ 90.531605] vma_interval_tree_remove+0xc75/0xec0 [ 90.531948] vma_prepare+0xc54/0x11a0 [ 90.532216] __split_vma+0x5af/0x950 [ 90.532480] ? __pfx___split_vma+0x10/0x10 [ 90.532773] ? find_held_lock+0x2c/0x110 [ 90.533097] do_vmi_align_munmap+0x2ba/0x11f0 [ 90.533450] ? lock_is_held_type+0x9f/0x120 [ 90.533780] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 90.534142] ? mtree_range_walk+0x632/0x900 [ 90.534470] ? mas_walk+0x5c7/0x7c0 [ 90.534747] do_vmi_munmap+0x1f1/0x2b0 [ 90.535043] mmap_region+0x1f9/0x2660 [ 90.535330] ? vm_mmap_pgoff+0x15c/0x3a0 [ 90.535632] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 90.536050] ? __pfx_lock_acquire+0x10/0x10 [ 90.536370] ? __pfx_mmap_region+0x10/0x10 [ 90.536685] ? security_mmap_addr+0x7d/0xa0 [ 90.537000] ? get_unmapped_area+0x1f5/0x3f0 [ 90.537332] do_mmap+0x854/0xf00 [ 90.537594] vm_mmap_pgoff+0x1a6/0x3a0 [ 90.537889] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 90.538221] ksys_mmap_pgoff+0x3af/0x500 [ 90.538517] do_syscall_64+0x3f/0x90 [ 90.538795] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 90.539173] RIP: 0033:0x7f6187fdbd82 [ 90.539451] 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 [ 90.540760] RSP: 002b:00007ffd71869758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 90.541302] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6187fdbd82 [ 90.541810] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6187415000 [ 90.542323] RBP: 00007f6187415000 R08: 0000000000000009 R09: 0000000000001000 [ 90.542843] R10: 0000000000000812 R11: 0000000000000206 R12: 00005571f1dfdf70 [ 90.543357] R13: 00007ffd71869770 R14: 00007ffd718697a0 R15: 00007ffd71869b00 [ 90.543880] [ 90.544053] [ 90.544182] Allocated by task 214: [ 90.544438] kasan_save_stack+0x22/0x50 [ 90.544740] kasan_set_track+0x25/0x30 [ 90.545030] __kasan_slab_alloc+0x59/0x70 [ 90.545350] kmem_cache_alloc+0x16b/0x370 [ 90.545654] vm_area_dup+0x20/0x160 [ 90.545931] __split_vma+0x170/0x950 [ 90.546207] split_vma+0xc6/0x110 [ 90.546467] mprotect_fixup+0x8d2/0xb30 [ 90.546764] do_mprotect_pkey+0x87e/0xd40 [ 90.547073] __x64_sys_mprotect+0x78/0xc0 [ 90.547383] do_syscall_64+0x3f/0x90 [ 90.547657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 90.548040] [ 90.548169] Freed by task 214: [ 90.548403] kasan_save_stack+0x22/0x50 [ 90.548694] kasan_set_track+0x25/0x30 [ 90.548983] kasan_save_free_info+0x2b/0x50 [ 90.549292] __kasan_slab_free+0x10a/0x190 [ 90.549619] kmem_cache_free+0x10d/0x4d0 [ 90.549915] rcu_core+0x8c8/0x2860 [ 90.550168] __do_softirq+0x1b7/0x7d4 [ 90.550452] [ 90.550578] Last potentially related work creation: [ 90.550931] kasan_save_stack+0x22/0x50 [ 90.551231] __kasan_record_aux_stack+0x8e/0xa0 [ 90.551568] __call_rcu_common.constprop.0+0x6a/0xb90 [ 90.551943] remove_vma+0x139/0x170 [ 90.552210] do_vmi_align_munmap+0xd4a/0x11f0 [ 90.552538] do_vmi_munmap+0x1f1/0x2b0 [ 90.552826] __vm_munmap+0x138/0x3a0 [ 90.553104] __x64_sys_munmap+0x59/0x80 [ 90.553404] do_syscall_64+0x3f/0x90 [ 90.553664] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 90.554028] [ 90.554149] The buggy address belongs to the object at ffff8880181e69f8 [ 90.554149] which belongs to the cache vm_area_struct of size 168 [ 90.554970] The buggy address is located 88 bytes inside of [ 90.554970] freed 168-byte region [ffff8880181e69f8, ffff8880181e6aa0) [ 90.555763] [ 90.555883] The buggy address belongs to the physical page: [ 90.556257] page:000000003f317021 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x181e6 [ 90.556869] memcg:ffff8880164fb301 [ 90.557108] flags: 0x100000000000200(slab|node=0|zone=1) [ 90.557480] page_type: 0xffffffff() [ 90.557730] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 90.558245] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880164fb301 [ 90.558748] page dumped because: kasan: bad access detected [ 90.559120] [ 90.559239] Memory state around the buggy address: [ 90.559566] ffff8880181e6900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 90.560044] ffff8880181e6980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 90.560518] >ffff8880181e6a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 90.560994] ^ [ 90.561391] ffff8880181e6a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 90.561862] ffff8880181e6b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 90.562335] ================================================================== [ 90.562932] Disabling lock debugging due to kernel taint [ 92.995796] BUG: Bad rss-counter state mm:0000000066589992 type:MM_FILEPAGES val:33 [ 92.997042] BUG: Bad rss-counter state mm:0000000066589992 type:MM_ANONPAGES val:22 [ 93.448032] BUG: Bad rss-counter state mm:000000006aae5c8e type:MM_FILEPAGES val:33 [ 93.449326] BUG: Bad rss-counter state mm:000000006aae5c8e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59030' (ECDSA) to the list of known hosts. 2023/06/20 03:49:59 fuzzer started 2023/06/20 03:49:59 dialing manager at localhost:44161 2023/06/20 03:49:59 checking machine... 2023/06/20 03:49:59 checking revisions... [ 94.098826] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:50:00 testing simple program... [ 94.149585] cgroup: Unknown subsys name 'net' [ 94.185799] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:49:00 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800fe08000 RSI=ffffffff814c84f5 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff888015c9f368 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6c88 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=ffff8880068a8280 RIP=ffffffff812d860e RFL=00000293 [--S-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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1804d7f900 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=00007f18041e4508 CR3=000000000cb96000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=739ca7cd346f36ba00000000000ae988 XMM05=ade39ec07f430f6a000000000013d528 XMM06=2d5b93cef43e86aa000000000013c5d0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800c5f2f00 RBX=0000000000000000 RCX=0000000080400040 RDX=000000008040000f RSI=ffffffff81806c6b RDI=0000000000000000 RBP=ffff88801652fc00 RSP=ffff88801652fb40 R8 =0000000080400040 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=ffffffff81806df1 R12=000000000003ce60 R13=ffff88800c5f2fc0 R14=ffffea0000317c80 R15=ffff88806cf3ce60 RIP=ffffffff818072b2 RFL=00000002 [-------] 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 00007f41e0bb0900 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=00007f41e11680b0 CR3=000000000d676000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000