syzkaller login: [ 30.915208] BUG: Bad rss-counter state mm:000000005bcbd1bc type:MM_FILEPAGES val:33 [ 30.915975] BUG: Bad rss-counter state mm:000000005bcbd1bc type:MM_ANONPAGES val:22 [ 31.047554] ================================================================== [ 31.048272] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.048891] Read of size 8 at addr ffff888018ce36b0 by task sshd/224 [ 31.049369] [ 31.049514] CPU: 0 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.050106] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.050833] Call Trace: [ 31.051061] [ 31.051255] dump_stack_lvl+0x91/0xf0 [ 31.051599] print_report+0xcc/0x620 [ 31.052116] ? __virt_addr_valid+0x102/0x340 [ 31.052494] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.052936] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.053381] kasan_report+0xbe/0xf0 [ 31.053723] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.054208] vma_interval_tree_remove+0xc75/0xec0 [ 31.054680] vma_prepare+0xc54/0x11a0 [ 31.055021] __split_vma+0x5af/0x950 [ 31.055326] ? __pfx___split_vma+0x10/0x10 [ 31.055687] ? find_held_lock+0x2c/0x110 [ 31.056047] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.056435] ? lock_is_held_type+0x9f/0x120 [ 31.056810] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.057221] ? mtree_range_walk+0x632/0x900 [ 31.057596] ? mas_walk+0x5c7/0x7c0 [ 31.057922] do_vmi_munmap+0x1f1/0x2b0 [ 31.058280] mmap_region+0x1f9/0x2660 [ 31.058691] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.059061] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.059571] ? __pfx_lock_acquire+0x10/0x10 [ 31.059949] ? __pfx_mmap_region+0x10/0x10 [ 31.060291] ? security_mmap_addr+0x7d/0xa0 [ 31.060650] ? get_unmapped_area+0x1f5/0x3f0 [ 31.061038] do_mmap+0x854/0xf00 [ 31.061336] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.061675] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.062061] ksys_mmap_pgoff+0x3af/0x500 [ 31.062411] do_syscall_64+0x3f/0x90 [ 31.062774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.063232] RIP: 0033:0x7fed341b8d82 [ 31.063559] 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 [ 31.065132] RSP: 002b:00007ffdc8b347e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.065737] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fed341b8d82 [ 31.066313] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fed335f2000 [ 31.066918] RBP: 00007fed335f2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.067503] R10: 0000000000000812 R11: 0000000000000206 R12: 00005562ce3b9ec0 [ 31.068066] R13: 00007ffdc8b34800 R14: 00007ffdc8b34830 R15: 00007ffdc8b34b90 [ 31.068669] [ 31.068890] [ 31.069038] Allocated by task 216: [ 31.069346] kasan_save_stack+0x22/0x50 [ 31.069718] kasan_set_track+0x25/0x30 [ 31.070067] __kasan_slab_alloc+0x59/0x70 [ 31.070444] kmem_cache_alloc+0x16b/0x370 [ 31.070931] vm_area_dup+0x20/0x160 [ 31.071227] __split_vma+0x170/0x950 [ 31.071516] split_vma+0xc6/0x110 [ 31.071782] mprotect_fixup+0x8d2/0xb30 [ 31.072094] do_mprotect_pkey+0x87e/0xd40 [ 31.072406] __x64_sys_mprotect+0x78/0xc0 [ 31.072720] do_syscall_64+0x3f/0x90 [ 31.073011] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.073397] [ 31.073526] Freed by task 205: [ 31.073768] kasan_save_stack+0x22/0x50 [ 31.074078] kasan_set_track+0x25/0x30 [ 31.074378] kasan_save_free_info+0x2b/0x50 [ 31.074750] __kasan_slab_free+0x10a/0x190 [ 31.075076] kmem_cache_free+0x10d/0x4d0 [ 31.075384] rcu_core+0x8c8/0x2860 [ 31.075656] __do_softirq+0x1b7/0x7d4 [ 31.075945] [ 31.076076] Last potentially related work creation: [ 31.076424] kasan_save_stack+0x22/0x50 [ 31.076727] __kasan_record_aux_stack+0x8e/0xa0 [ 31.077076] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.077473] remove_vma+0x139/0x170 [ 31.077746] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.078117] do_vmi_munmap+0x1f1/0x2b0 [ 31.078415] __vm_munmap+0x138/0x3a0 [ 31.078725] __x64_sys_munmap+0x59/0x80 [ 31.079031] do_syscall_64+0x3f/0x90 [ 31.079314] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.079702] [ 31.079834] The buggy address belongs to the object at ffff888018ce3658 [ 31.079834] which belongs to the cache vm_area_struct of size 168 [ 31.080720] The buggy address is located 88 bytes inside of [ 31.080720] freed 168-byte region [ffff888018ce3658, ffff888018ce3700) [ 31.081564] [ 31.081697] The buggy address belongs to the physical page: [ 31.082105] page:000000008051e078 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18ce3 [ 31.082802] memcg:ffff888015a1a501 [ 31.083059] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.083450] page_type: 0xffffffff() [ 31.083723] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.084276] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015a1a501 [ 31.084820] page dumped because: kasan: bad access detected [ 31.085213] [ 31.085343] Memory state around the buggy address: [ 31.085691] ffff888018ce3580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.086207] ffff888018ce3600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.086762] >ffff888018ce3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.087270] ^ [ 31.087624] ffff888018ce3700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.088153] ffff888018ce3780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.088673] ================================================================== [ 31.089382] Disabling lock debugging due to kernel taint [ 32.459474] BUG: Bad rss-counter state mm:000000009b23b1e0 type:MM_FILEPAGES val:33 [ 32.460535] BUG: Bad rss-counter state mm:000000009b23b1e0 type:MM_ANONPAGES val:22 [ 32.810084] BUG: Bad rss-counter state mm:00000000026ad14d type:MM_FILEPAGES val:33 [ 32.811024] BUG: Bad rss-counter state mm:00000000026ad14d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62081' (ECDSA) to the list of known hosts. 2023/06/21 09:03:29 fuzzer started 2023/06/21 09:03:29 dialing manager at localhost:36067 2023/06/21 09:03:29 checking machine... 2023/06/21 09:03:29 checking revisions... [ 33.381823] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:03:29 testing simple program... [ 33.417082] cgroup: Unknown subsys name 'net' [ 33.453901] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:03:29 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=00007fbfb8e825b0 CR3=0000000009b28000 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=e1636a4c1e9a29845946a0874d3b38a1 XMM02=2c67c8bc2e329bc3000000000011a3d8 XMM03=fb795ef6d65770560000000000121840 XMM04=2d62fa3a03cd7e3b00000000000ae988 XMM05=5a9d233068761c4a00000000001316a8 XMM06=663bfe82f3cd26d30000000000130510 XMM07=e042d86d42eb936e0000000000121ac0 XMM08=2711fb4ae6fd2e97000000000011a438 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff815345ff RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84512042 RSP=ffff888016d9ff18 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888016d9ff58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81534607 RFL=00000047 [---Z-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 00007f68e0886900 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=00007ffda0793000 CR3=0000000018e46000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000