syzkaller login: [ 44.563400] BUG: Bad rss-counter state mm:0000000022c90447 type:MM_FILEPAGES val:33 [ 44.565376] BUG: Bad rss-counter state mm:0000000022c90447 type:MM_ANONPAGES val:22 [ 44.717893] ================================================================== [ 44.718831] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.719752] Read of size 8 at addr ffff8880159e8df0 by task sshd/226 [ 44.720500] [ 44.720747] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.721720] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.722680] Call Trace: [ 44.722998] [ 44.723280] dump_stack_lvl+0x91/0xf0 [ 44.723771] print_report+0xcc/0x620 [ 44.724256] ? __virt_addr_valid+0x102/0x340 [ 44.724826] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.725451] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.726084] kasan_report+0xbe/0xf0 [ 44.726558] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.727169] vma_interval_tree_remove+0xc75/0xec0 [ 44.727789] vma_prepare+0xc54/0x11a0 [ 44.728282] __split_vma+0x5af/0x950 [ 44.728776] ? __pfx___split_vma+0x10/0x10 [ 44.729296] ? find_held_lock+0x2c/0x110 [ 44.729823] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.730385] ? lock_is_held_type+0x9f/0x120 [ 44.730918] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.731518] ? mtree_range_walk+0x632/0x900 [ 44.732056] ? mas_walk+0x5c7/0x7c0 [ 44.732526] do_vmi_munmap+0x1f1/0x2b0 [ 44.733035] mmap_region+0x1f9/0x2660 [ 44.733512] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.734020] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.734718] ? __pfx_lock_acquire+0x10/0x10 [ 44.735247] ? __pfx_mmap_region+0x10/0x10 [ 44.735772] ? security_mmap_addr+0x7d/0xa0 [ 44.736294] ? get_unmapped_area+0x1f5/0x3f0 [ 44.736849] do_mmap+0x854/0xf00 [ 44.737282] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.737778] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.738338] ksys_mmap_pgoff+0x3af/0x500 [ 44.738839] do_syscall_64+0x3f/0x90 [ 44.739313] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.739955] RIP: 0033:0x7f56caaa5d82 [ 44.740404] 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 [ 44.742548] RSP: 002b:00007fff53033c18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.743456] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f56caaa5d82 [ 44.744307] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f56c9edf000 [ 44.745170] RBP: 00007f56c9edf000 R08: 0000000000000009 R09: 0000000000001000 [ 44.746010] R10: 0000000000000812 R11: 0000000000000206 R12: 00005604c4b6fec0 [ 44.746864] R13: 00007fff53033c30 R14: 00007fff53033c60 R15: 00007fff53033fc0 [ 44.747727] [ 44.748015] [ 44.748232] Allocated by task 219: [ 44.748673] kasan_save_stack+0x22/0x50 [ 44.749202] kasan_set_track+0x25/0x30 [ 44.749698] __kasan_slab_alloc+0x59/0x70 [ 44.750218] kmem_cache_alloc+0x16b/0x370 [ 44.750737] vm_area_dup+0x20/0x160 [ 44.751198] __split_vma+0x170/0x950 [ 44.751668] split_vma+0xc6/0x110 [ 44.752112] mprotect_fixup+0x8d2/0xb30 [ 44.752612] do_mprotect_pkey+0x87e/0xd40 [ 44.753143] __x64_sys_mprotect+0x78/0xc0 [ 44.753667] do_syscall_64+0x3f/0x90 [ 44.754142] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.754788] [ 44.755003] Freed by task 219: [ 44.755403] kasan_save_stack+0x22/0x50 [ 44.755901] kasan_set_track+0x25/0x30 [ 44.756392] kasan_save_free_info+0x2b/0x50 [ 44.756928] __kasan_slab_free+0x10a/0x190 [ 44.757475] kmem_cache_free+0x10d/0x4d0 [ 44.757993] rcu_core+0x8c8/0x2860 [ 44.758438] __do_softirq+0x1b7/0x7d4 [ 44.758922] [ 44.759138] Last potentially related work creation: [ 44.759726] kasan_save_stack+0x22/0x50 [ 44.760233] __kasan_record_aux_stack+0x8e/0xa0 [ 44.760830] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.761474] remove_vma+0x139/0x170 [ 44.761928] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.762492] do_vmi_munmap+0x1f1/0x2b0 [ 44.762985] __vm_munmap+0x138/0x3a0 [ 44.763464] __x64_sys_munmap+0x59/0x80 [ 44.763959] do_syscall_64+0x3f/0x90 [ 44.764431] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.765075] [ 44.765297] The buggy address belongs to the object at ffff8880159e8d98 [ 44.765297] which belongs to the cache vm_area_struct of size 168 [ 44.766762] The buggy address is located 88 bytes inside of [ 44.766762] freed 168-byte region [ffff8880159e8d98, ffff8880159e8e40) [ 44.768162] [ 44.768375] The buggy address belongs to the physical page: [ 44.769045] page:00000000836c7631 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x159e8 [ 44.770135] memcg:ffff888016ac4001 [ 44.770562] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.771231] page_type: 0xffffffff() [ 44.771695] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.772629] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ac4001 [ 44.773546] page dumped because: kasan: bad access detected [ 44.774204] [ 44.774423] Memory state around the buggy address: [ 44.775000] ffff8880159e8c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 44.775867] ffff8880159e8d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 44.776741] >ffff8880159e8d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 44.777647] ^ [ 44.778469] ffff8880159e8e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 44.779351] ffff8880159e8e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.780216] ================================================================== [ 44.781342] Disabling lock debugging due to kernel taint [ 47.458519] BUG: Bad rss-counter state mm:0000000086eec9a6 type:MM_FILEPAGES val:33 [ 47.459910] BUG: Bad rss-counter state mm:0000000086eec9a6 type:MM_ANONPAGES val:22 [ 47.984415] BUG: Bad rss-counter state mm:000000004fa062f4 type:MM_FILEPAGES val:33 [ 47.985585] BUG: Bad rss-counter state mm:000000004fa062f4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13694' (ECDSA) to the list of known hosts. 2023/06/19 19:48:45 fuzzer started 2023/06/19 19:48:46 dialing manager at localhost:44161 2023/06/19 19:48:46 checking machine... 2023/06/19 19:48:46 checking revisions... [ 48.729138] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:48:46 testing simple program... [ 48.771955] cgroup: Unknown subsys name 'net' [ 48.821235] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:48:39 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000053 RCX=ffffffff8184ced7 RDX=1ffffd4000064d20 RSI=0000000000000008 RDI=ffffea0000326900 RBP=ffff88800c9a6453 RSP=ffff888014677878 R8 =0000000000000000 R9 =fffff94000064d20 R10=ffffea0000326907 R11=0000000000000000 R12=ffff88800c9a6400 R13=0000000000000001 R14=0100000000010200 R15=ffffea0000326900 RIP=ffffffff8184cef5 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 00007f0e6c7b0900 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=00007f0e6bc39fa0 CR3=000000000c482000 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=4f9850b7f02b5787ef43f7da4037858f XMM02=000000000011cd40eff9b2d0a8fce9cb XMM03=000000000011ce102c67c8bc2e329bc3 XMM04=e05ab883e46ca79e00000000000ae988 XMM05=79e92ed7452eba1d00000000001350a0 XMM06=fdb02789931f531a0000000000133e40 XMM07=fb795ef6d65770560000000000123b78 XMM08=2c67c8bc2e329bc3000000000011cdb0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fff12edf000 CR3=000000000e3e6000 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=2035343a38343a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a38343a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000