syzkaller login: [ 78.359420] BUG: Bad rss-counter state mm:000000007e79cde0 type:MM_FILEPAGES val:33 [ 78.360627] BUG: Bad rss-counter state mm:000000007e79cde0 type:MM_ANONPAGES val:22 [ 78.396886] ================================================================== [ 78.398083] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 78.399299] Read of size 8 at addr ffff888009580d08 by task sshd/220 [ 78.400366] [ 78.400649] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 78.401988] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 78.403267] Call Trace: [ 78.403693] [ 78.404069] dump_stack_lvl+0x91/0xf0 [ 78.404715] print_report+0xcc/0x620 [ 78.405356] ? __virt_addr_valid+0x102/0x340 [ 78.406102] ? vma_interval_tree_remove+0xc75/0xec0 [ 78.406930] ? vma_interval_tree_remove+0xc75/0xec0 [ 78.407754] kasan_report+0xbe/0xf0 [ 78.408410] ? vma_interval_tree_remove+0xc75/0xec0 [ 78.409252] vma_interval_tree_remove+0xc75/0xec0 [ 78.410087] vma_prepare+0xc54/0x11a0 [ 78.410729] __split_vma+0x5af/0x950 [ 78.411315] ? __pfx___split_vma+0x10/0x10 [ 78.411936] ? find_held_lock+0x2c/0x110 [ 78.412563] do_vmi_align_munmap+0x2ba/0x11f0 [ 78.413236] ? lock_is_held_type+0x9f/0x120 [ 78.413864] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 78.414600] ? mtree_range_walk+0x632/0x900 [ 78.415255] ? mas_walk+0x5c7/0x7c0 [ 78.415816] do_vmi_munmap+0x1f1/0x2b0 [ 78.416406] mmap_region+0x1f9/0x2660 [ 78.416978] ? vm_mmap_pgoff+0x15c/0x3a0 [ 78.417588] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 78.418454] ? __pfx_lock_acquire+0x10/0x10 [ 78.419085] ? __pfx_mmap_region+0x10/0x10 [ 78.419709] ? security_mmap_addr+0x7d/0xa0 [ 78.420341] ? get_unmapped_area+0x1f5/0x3f0 [ 78.420985] do_mmap+0x854/0xf00 [ 78.421501] vm_mmap_pgoff+0x1a6/0x3a0 [ 78.422094] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 78.422760] ksys_mmap_pgoff+0x3af/0x500 [ 78.423335] do_syscall_64+0x3f/0x90 [ 78.423854] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.424555] RIP: 0033:0x7f256ebf4d82 [ 78.425191] 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 [ 78.427624] RSP: 002b:00007ffc493cea88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 78.428600] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f256ebf4d82 [ 78.429511] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f256e02e000 [ 78.430441] RBP: 00007f256e02e000 R08: 0000000000000009 R09: 0000000000001000 [ 78.431353] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f4b465eec0 [ 78.432251] R13: 00007ffc493ceaa0 R14: 00007ffc493cead0 R15: 00007ffc493cee30 [ 78.433160] [ 78.433469] [ 78.433697] Allocated by task 213: [ 78.434163] kasan_save_stack+0x22/0x50 [ 78.434697] kasan_set_track+0x25/0x30 [ 78.435221] __kasan_slab_alloc+0x59/0x70 [ 78.435785] kmem_cache_alloc+0x16b/0x370 [ 78.436334] vm_area_dup+0x20/0x160 [ 78.436819] __split_vma+0x170/0x950 [ 78.437313] split_vma+0xc6/0x110 [ 78.437777] mprotect_fixup+0x8d2/0xb30 [ 78.438343] do_mprotect_pkey+0x87e/0xd40 [ 78.438904] __x64_sys_mprotect+0x78/0xc0 [ 78.439455] do_syscall_64+0x3f/0x90 [ 78.439964] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.440641] [ 78.440871] Freed by task 213: [ 78.441288] kasan_save_stack+0x22/0x50 [ 78.441834] kasan_set_track+0x25/0x30 [ 78.442383] kasan_save_free_info+0x2b/0x50 [ 78.442958] __kasan_slab_free+0x10a/0x190 [ 78.443526] kmem_cache_free+0x10d/0x4d0 [ 78.444069] rcu_core+0x8c8/0x2860 [ 78.444556] __do_softirq+0x1b7/0x7d4 [ 78.445081] [ 78.445319] Last potentially related work creation: [ 78.445960] kasan_save_stack+0x22/0x50 [ 78.446502] __kasan_record_aux_stack+0x8e/0xa0 [ 78.447113] __call_rcu_common.constprop.0+0x6a/0xb90 [ 78.447808] remove_vma+0x139/0x170 [ 78.448298] do_vmi_align_munmap+0xd4a/0x11f0 [ 78.448899] do_vmi_munmap+0x1f1/0x2b0 [ 78.449425] __vm_munmap+0x138/0x3a0 [ 78.449928] __x64_sys_munmap+0x59/0x80 [ 78.450481] do_syscall_64+0x3f/0x90 [ 78.450995] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.451680] [ 78.451911] Second to last potentially related work creation: [ 78.452647] kasan_save_stack+0x22/0x50 [ 78.453192] __kasan_record_aux_stack+0x8e/0xa0 [ 78.453807] __call_rcu_common.constprop.0+0x6a/0xb90 [ 78.454528] remove_vma+0x139/0x170 [ 78.455015] do_vmi_align_munmap+0xd4a/0x11f0 [ 78.455604] do_vmi_munmap+0x1f1/0x2b0 [ 78.456121] mmap_region+0x1f9/0x2660 [ 78.456649] do_mmap+0x854/0xf00 [ 78.457113] vm_mmap_pgoff+0x1a6/0x3a0 [ 78.457628] ksys_mmap_pgoff+0x3af/0x500 [ 78.458178] do_syscall_64+0x3f/0x90 [ 78.458700] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 78.459378] [ 78.459614] The buggy address belongs to the object at ffff888009580cb0 [ 78.459614] which belongs to the cache vm_area_struct of size 168 [ 78.461219] The buggy address is located 88 bytes inside of [ 78.461219] freed 168-byte region [ffff888009580cb0, ffff888009580d58) [ 78.462762] [ 78.462997] The buggy address belongs to the physical page: [ 78.463721] page:0000000009954133 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9580 [ 78.464897] memcg:ffff88800d288a01 [ 78.465354] flags: 0x100000000000200(slab|node=0|zone=1) [ 78.466067] page_type: 0xffffffff() [ 78.466566] raw: 0100000000000200 ffff88800879fc80 ffffea00003b0000 dead000000000004 [ 78.467560] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d288a01 [ 78.468552] page dumped because: kasan: bad access detected [ 78.469284] [ 78.469518] Memory state around the buggy address: [ 78.470180] ffff888009580c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 78.471123] ffff888009580c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 78.472047] >ffff888009580d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 78.472976] ^ [ 78.473451] ffff888009580d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 78.474390] ffff888009580e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 78.475318] ================================================================== [ 78.476632] Disabling lock debugging due to kernel taint [ 80.436521] BUG: Bad rss-counter state mm:00000000b8d34398 type:MM_FILEPAGES val:33 [ 80.437499] BUG: Bad rss-counter state mm:00000000b8d34398 type:MM_ANONPAGES val:22 [ 80.938512] BUG: Bad rss-counter state mm:0000000068414aa8 type:MM_FILEPAGES val:33 [ 80.939507] BUG: Bad rss-counter state mm:0000000068414aa8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27669' (ECDSA) to the list of known hosts. 2023/06/20 07:36:34 fuzzer started 2023/06/20 07:36:34 dialing manager at localhost:44161 2023/06/20 07:36:34 checking machine... 2023/06/20 07:36:34 checking revisions... [ 81.678027] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:36:34 testing simple program... [ 81.728181] cgroup: Unknown subsys name 'net' [ 81.764651] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:35:46 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff81807ebb RCX=0000000000000001 RDX=1ffff11003418ed0 RSI=ffff88801a0c7990 RDI=ffffffff81807ebb RBP=ffffffff81807ebb RSP=ffff88801a0c75d8 R8 =0000000000000001 R9 =ffff88801a0c7668 R10=0000000000038001 R11=0000000000020de7 R12=0000000000000001 R13=0000000000000000 R14=ffff888015fd1b40 R15=0000000000000d40 RIP=ffffffff811fc772 RFL=00000287 [--S--PC] 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 00007f8832053700 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=00007ffe89d36588 CR3=0000000019e2c000 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=2034333a36333a3730203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a36333a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080010000 RBX=ffff88806cf293c0 RCX=ffffffff813bcf4a RDX=ffff8880168cb680 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000000 RSP=ffff88806cf09dd0 R8 =0000000000000007 R9 =0000000000000000 R10=ffffffffffffffbb R11=000000169112e484 R12=ffffffffffffffbb R13=ffff88806cf2c240 R14=ffff888015f179d8 R15=dffffc0000000000 RIP=ffffffff814c07e0 RFL=00000086 [--S--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 00007f5bff8df900 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=00007f5bffe94650 CR3=000000000c626000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000