Details
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Bug
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Resolution: Unresolved
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Medium
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None
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None
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None
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3
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9223372036854775807
Description
[ 89.443257] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 89.443261] #PF: supervisor read access in kernel mode [ 89.443262] #PF: error_code(0x0000) - not-present page [ 89.443263] PGD 13721d067 P4D 13721d067 PUD 12f2e3067 PMD 0 [ 89.443266] Oops: 0000 [#1] SMP [ 89.443269] CPU: 1 PID: 10112 Comm: lctl Tainted: G W O ------- --- 5.14.0 #24 [ 89.443271] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.17.0-4.fc41 04/01/2014 [ 89.443272] RIP: 0010:lmv_tgt_seq_start+0x32/0x60 [lmv] [ 89.443287] Code: 8b 06 8b 8f f8 10 00 00 48 39 c8 48 89 ca 7d 38 39 c2 76 1f 89 c2 48 89 c1 c1 ea 09 81 e1 ff 01 00 00 48 8b 94 d7 f8 0c 00 00 <4c> 8b 04 ca 4d 85 c0 75 18 48 83 c0 01 48 89 06 8b 8f f8 10 00 00 [ 89.443288] RSP: 0018:ffff90d318b0bd80 EFLAGS: 00010246 [ 89.443289] RAX: 0000000000000000 RBX: ffff90d43b9f2ae0 RCX: 0000000000000000 [ 89.443291] RDX: 0000000000000000 RSI: ffff90d43b9f2b08 RDI: ffff90d33722c230 [ 89.443291] RBP: 0000000000000000 R08: 0000000000400cc0 R09: 00000000ffffffff [ 89.443292] R10: ffffffff8d2d8827 R11: 0000000000000000 R12: ffff90d318b0be18 [ 89.443293] R13: ffff90d318b0bdf0 R14: ffff90d43b9f2b08 R15: ffff90d318b0bf10 [ 89.443296] FS: 00007f0ba1a02940(0000) GS:ffff90d450900000(0000) knlGS:0000000000000000 [ 89.443297] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 89.443298] CR2: 0000000000000000 CR3: 00000001444a2000 CR4: 0000000000350eb0 [ 89.443302] Call Trace: [ 89.443305] <TASK> [ 89.443307] ? __die_body.cold+0x1a/0x1f [ 89.443311] ? page_fault_oops+0x65/0x1d0 [ 89.443314] ? lockdep_init_map_type+0x47/0x220 [ 89.443330] ? exc_page_fault+0x65/0x240 [ 89.443333] ? asm_exc_page_fault+0x22/0x30 [ 89.443336] ? seq_read_iter+0x377/0x460 [ 89.443339] ? lmv_tgt_seq_start+0x32/0x60 [lmv] [ 89.443347] seq_read_iter+0xdd/0x460 [ 89.443350] seq_read+0x131/0x160 [ 89.443352] full_proxy_read+0x4b/0x70 [ 89.443356] vfs_read+0x8e/0x3b0 [ 89.443358] ? do_sys_openat2+0x58/0xa0 [ 89.443361] ksys_read+0x50/0xc0 [ 89.443363] do_syscall_64+0x38/0xe0
this is lctl get_param racing with mount