syzkaller login: [ 38.394060] BUG: Bad rss-counter state mm:000000004d6d5f5c type:MM_FILEPAGES val:33 [ 38.395291] BUG: Bad rss-counter state mm:000000004d6d5f5c type:MM_ANONPAGES val:22 [ 38.443404] ================================================================== [ 38.444722] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.445998] Read of size 8 at addr ffff88800e7d8228 by task sshd/220 [ 38.446870] [ 38.447120] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.448028] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.449110] Call Trace: [ 38.449473] [ 38.449745] dump_stack_lvl+0x91/0xf0 [ 38.450213] print_report+0xcc/0x620 [ 38.450677] ? __virt_addr_valid+0x102/0x340 [ 38.451201] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.451786] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.452375] kasan_report+0xbe/0xf0 [ 38.452835] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.453486] vma_interval_tree_remove+0xc75/0xec0 [ 38.454091] vma_prepare+0xc54/0x11a0 [ 38.454554] __split_vma+0x5af/0x950 [ 38.455032] ? __pfx___split_vma+0x10/0x10 [ 38.455561] ? find_held_lock+0x2c/0x110 [ 38.456099] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.456674] ? lock_is_held_type+0x9f/0x120 [ 38.457224] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.457813] ? mtree_range_walk+0x632/0x900 [ 38.458349] ? mas_walk+0x5c7/0x7c0 [ 38.458801] do_vmi_munmap+0x1f1/0x2b0 [ 38.459280] mmap_region+0x1f9/0x2660 [ 38.459752] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.460255] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.460949] ? __pfx_lock_acquire+0x10/0x10 [ 38.461492] ? __pfx_mmap_region+0x10/0x10 [ 38.461993] ? security_mmap_addr+0x7d/0xa0 [ 38.462488] ? get_unmapped_area+0x1f5/0x3f0 [ 38.463011] do_mmap+0x854/0xf00 [ 38.463435] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.463903] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.464432] ksys_mmap_pgoff+0x3af/0x500 [ 38.464909] do_syscall_64+0x3f/0x90 [ 38.465373] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.465978] RIP: 0033:0x7f6a0fb6ad82 [ 38.466414] 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 [ 38.468399] RSP: 002b:00007fffef3e1598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.469261] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6a0fb6ad82 [ 38.470052] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6a0efa4000 [ 38.470870] RBP: 00007f6a0efa4000 R08: 0000000000000009 R09: 0000000000001000 [ 38.471709] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d2371b5b20 [ 38.472539] R13: 00007fffef3e15b0 R14: 00007fffef3e15e0 R15: 00007fffef3e1940 [ 38.473378] [ 38.473657] [ 38.473871] Allocated by task 213: [ 38.474284] kasan_save_stack+0x22/0x50 [ 38.474767] kasan_set_track+0x25/0x30 [ 38.475249] __kasan_slab_alloc+0x59/0x70 [ 38.475764] kmem_cache_alloc+0x16b/0x370 [ 38.476274] vm_area_dup+0x20/0x160 [ 38.476718] __split_vma+0x170/0x950 [ 38.477177] split_vma+0xc6/0x110 [ 38.477600] mprotect_fixup+0x8d2/0xb30 [ 38.478125] do_mprotect_pkey+0x87e/0xd40 [ 38.478649] __x64_sys_mprotect+0x78/0xc0 [ 38.479174] do_syscall_64+0x3f/0x90 [ 38.479648] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.480288] [ 38.480501] Freed by task 203: [ 38.480915] kasan_save_stack+0x22/0x50 [ 38.481442] kasan_set_track+0x25/0x30 [ 38.481940] kasan_save_free_info+0x2b/0x50 [ 38.482470] __kasan_slab_free+0x10a/0x190 [ 38.483005] kmem_cache_free+0x10d/0x4d0 [ 38.483526] rcu_core+0x8c8/0x2860 [ 38.484031] __do_softirq+0x1b7/0x7d4 [ 38.484505] [ 38.484722] Last potentially related work creation: [ 38.485329] kasan_save_stack+0x22/0x50 [ 38.485828] __kasan_record_aux_stack+0x8e/0xa0 [ 38.486398] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.487044] remove_vma+0x139/0x170 [ 38.487491] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.488046] do_vmi_munmap+0x1f1/0x2b0 [ 38.488539] __vm_munmap+0x138/0x3a0 [ 38.489005] __x64_sys_munmap+0x59/0x80 [ 38.489512] do_syscall_64+0x3f/0x90 [ 38.489980] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.490613] [ 38.490830] The buggy address belongs to the object at ffff88800e7d81d0 [ 38.490830] which belongs to the cache vm_area_struct of size 168 [ 38.492337] The buggy address is located 88 bytes inside of [ 38.492337] freed 168-byte region [ffff88800e7d81d0, ffff88800e7d8278) [ 38.493783] [ 38.493999] The buggy address belongs to the physical page: [ 38.494662] page:00000000247a0f58 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7d8 [ 38.495739] memcg:ffff888018c52b01 [ 38.496161] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.496801] page_type: 0xffffffff() [ 38.497269] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.498183] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018c52b01 [ 38.499082] page dumped because: kasan: bad access detected [ 38.499742] [ 38.499953] Memory state around the buggy address: [ 38.500537] ffff88800e7d8100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.501394] ffff88800e7d8180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.502251] >ffff88800e7d8200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.503098] ^ [ 38.503652] ffff88800e7d8280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.504508] ffff88800e7d8300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.505375] ================================================================== [ 38.506287] Disabling lock debugging due to kernel taint [ 40.374408] BUG: Bad rss-counter state mm:00000000f4cea411 type:MM_FILEPAGES val:33 [ 40.375298] BUG: Bad rss-counter state mm:00000000f4cea411 type:MM_ANONPAGES val:22 [ 40.908936] BUG: Bad rss-counter state mm:00000000ad9d7959 type:MM_FILEPAGES val:33 [ 40.910109] BUG: Bad rss-counter state mm:00000000ad9d7959 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55125' (ECDSA) to the list of known hosts. 2023/06/19 11:22:59 fuzzer started 2023/06/19 11:22:59 dialing manager at localhost:44161 2023/06/19 11:22:59 checking machine... 2023/06/19 11:22:59 checking revisions... [ 41.522612] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:23:00 testing simple program... [ 41.571698] cgroup: Unknown subsys name 'net' [ 41.620580] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:22:51 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff814c84ed RDX=ffff88800e7c51c0 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888018e0f1e0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=00000000000928c0 RIP=ffffffff814c0245 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3d277fc900 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=00007ffd6d270000 CR3=000000000d8e4000 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=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 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=0000000000000001 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=00007f0d14242940 CR3=0000000010222000 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=2039353a32323a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a32323a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000