5.9.0-next-20201015: autofs oops in update-binfmts

From: Pavel Machek
Date: Fri Oct 16 2020 - 08:35:37 EST

Hi!

I'm getting this during boot: 32-bit thinkpad x60.

[ 10.718377] BUG: kernel NULL pointer dereference, address: 00000000
[ 10.721848] #PF: supervisor read access in kernel mode
[ 10.722763] #PF: error_code(0x0000) - not-present page
[ 10.726759] *pdpt = 000000000339e001 *pde = 0000000000000000
[ 10.730793] Oops: 0000 [#1] PREEMPT SMP PTI
[ 10.736201] CPU: 1 PID: 2762 Comm: update-binfmts Not tainted 5.9.0-next-20201015+ #152
[ 10.738769] Hardware name: LENOVO 17097HU/17097HU, BIOS 7BETD8WW (2.19 ) 03/31/2011
[ 10.742769] EIP: __kernel_write+0xd4/0x230
[ 10.746769] Code: 89 d6 64 8b 15 b4 77 4c c5 8b 8a 38 0b 00 00 31 d2 85 c9 74 04 0f b7 51 30 66 89 75 e8 8b 75 ac 8d 4d b0 89 45 e4 66 89 55 ea <8b> 06 8b 56 04 57 6a 01 89 45 d4 8d 45 b8 89 55 d8 ba 01 00 00 00
[ 10.758762] EAX: 00020000 EBX: c1922a40 ECX: c33cdad0 EDX: 00000000
[ 10.762791] ESI: 00000000 EDI: 0000012c EBP: c33cdb20 ESP: c33cdacc
[ 10.766766] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010286
[ 10.770762] CR0: 80050033 CR2: 00000000 CR3: 033d0000 CR4: 000006b0
[ 10.770762] Call Trace:
[ 10.770762] ? __mutex_unlock_slowpath+0x2b/0x2c0
[ 10.770762] ? dma_direct_map_sg+0x13a/0x320
[ 10.770762] autofs_notify_daemon+0x14d/0x2b0
[ 10.770762] autofs_wait+0x4cd/0x770
[ 10.793051] ? autofs_d_automount+0xd6/0x1e0
[ 10.793051] autofs_mount_wait+0x43/0xe0
[ 10.797808] autofs_d_automount+0xdf/0x1e0
[ 10.797808] __traverse_mounts+0x85/0x200
[ 10.797808] step_into+0x368/0x620
[ 10.797808] ? proc_setup_thread_self+0x110/0x110
[ 10.797808] walk_component+0x58/0x190
[ 10.811838] link_path_walk.part.0+0x245/0x360
[ 10.811838] path_lookupat.isra.0+0x31/0x130
[ 10.811838] filename_lookup+0x8d/0x130
[ 10.818749] ? cache_alloc_debugcheck_after+0x151/0x180
[ 10.818749] ? getname_flags+0x1f/0x160
[ 10.818749] ? kmem_cache_alloc+0x75/0x100
[ 10.818749] user_path_at_empty+0x25/0x30
[ 10.818749] vfs_statx+0x63/0x100
[ 10.831022] ? _raw_spin_unlock+0x18/0x30
[ 10.831022] ? replace_page_cache_page+0x160/0x160
[ 10.831022] __do_sys_stat64+0x36/0x60
[ 10.831022] ? exit_to_user_mode_prepare+0x35/0xe0
[ 10.831022] ? irqentry_exit_to_user_mode+0x8/0x20
[ 10.838773] ? irqentry_exit+0x55/0x70
[ 10.838773] ? exc_page_fault+0x228/0x3c0
[ 10.838773] __ia32_sys_stat64+0xd/0x10
[ 10.838773] do_int80_syscall_32+0x2c/0x40
[ 10.848561] entry_INT80_32+0x111/0x111
[ 10.848561] EIP: 0xb7ee2092
[ 10.848561] Code: 00 00 00 e9 90 ff ff ff ff a3 24 00 00 00 68 30 00 00 00 e9 80 ff ff ff ff a3 e8 ff ff ff 66 90 00 00 00 00 00 00 00 00 cd 80 <c3> 8d b4 26 00 00 00 00 8d b6 00 00 00 00 8b 1c 24 c3 8d b4 26 00
[ 10.848561] EAX: ffffffda EBX: 00468490 ECX: bfbce6ec EDX: 00467348
[ 10.848561] ESI: 00000000 EDI: 00468490 EBP: bfbce6ec ESP: bfbce6c4
[ 10.848561] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00000292
[ 10.848561] Modules linked in:
[ 10.848561] CR2: 0000000000000000
[ 10.851552] ---[ end trace d01bd7323c2317a5 ]---
[ 10.851558] EIP: __kernel_write+0xd4/0x230
[ 10.851561] Code: 89 d6 64 8b 15 b4 77 4c c5 8b 8a 38 0b 00 00 31 d2 85 c9 74 04 0f b7 51 30 66 89 75 e8 8b 75 ac 8d 4d b0 89 45 e4 66 89 55 ea <8b> 06 8b 56 04 57 6a 01 89 45 d4 8d 45 b8 89 55 d8 ba 01 00 00 00
[ 10.851563] EAX: 00020000 EBX: c1922a40 ECX: c33cdad0 EDX: 00000000
[ 10.851565] ESI: 00000000 EDI: 0000012c EBP: c33cdb20 ESP: c33cdacc
[ 10.851568] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010286
[ 10.851570] CR0: 80050033 CR2: 004a700e CR3: 033d0000 CR4: 000006b0
[ 11.803128] systemd-journald[2514]: Received request to flush runtime journal from PID 1
[ 26.113941] iwl3945 0000:03:00.0: loaded firmware version 15.32.2.9
[ 59.809322] traps: clock-applet[3636] trap int3 ip:b724ffc0 sp:bf879b90 error:0 in libglib-2.0.so.0.5000.3[b7203000+12a000]
[ 59.812036] traps: mateweather-app[3638] trap int3 ip:b7283fc0 sp:bfb65760 error:0 in libglib-2.0.so.0.5000.3[b7237000+12a000]
[ 64.628401] wlan0: authenticate with 5c:f4:ab:10:d2:bb

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